Items where Author is "Freitag, Johannes"

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Number of items: 132.

Article

Article
Pearce, E. , Zigone, D. , Hofstede, C. , Fichtner, A. , Rimpot, J. , Rasmussen, S. O. , Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440 and Eisen, O. ORCID: https://orcid.org/0000-0002-6380-962X (2024)
Firn seismic anisotropy in the Northeast Greenland Ice Stream from ambient-noise surface waves ,
The Cryosphere, 18 (10), pp. 4917-4932 .
doi:10.5194/tc-18-4917-2024 , hdl:10013/epic.004f391e-17c2-40a8-a425-2e1c0a7e72a7
[thumbnail of Pearce_eteal_2024_TC_firn-noise-Greenland.pdf]
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Westhoff, J. , Freitag, J. , Orsi, A. , Martinerie, P. , Weikusat, I. , Dyonisius, M. , Faïn, X. , Fourteau, K. and Blunier, T. (2024)
Combining traditional and novel techniques to increase our understanding of the lock-in depth of atmospheric gases in polar ice cores – results from the EastGRIP region ,
The Cryosphere, 18 (9), pp. 4379-4397 .
doi:10.5194/tc-18-4379-2024 , hdl:10013/epic.9053681e-fd9b-47f5-ac03-e0c6334d8408
[thumbnail of tc-18-4379-2024.pdf]
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Fourteau, K. , Freitag, J. , Malinen, M. and Löwe, H. (2024)
Microstructure-based simulations of the viscous densification of snow and firn ,
The Cryosphere, 18 (6), pp. 2831-2846 .
doi:10.5194/tc-18-2831-2024 , hdl:10013/epic.d46eab97-5613-4bbf-b96b-c7f5058a8e37
[thumbnail of tc-18-2831-2024.pdf]
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Llorenç-Vicedo, A. , Gomez, M. L. , Zeising, O. ORCID: https://orcid.org/0000-0002-1284-8098, Kleiner, T. , Freitag, J. , Martinez-Hernandez, F. , Wilhelms, F. and Martinez-Garcia, M. (2024)
New avenues for potentially seeking microbial responses to climate change beneath Antarctic ice shelves / McMahon, K. (editor) ,
mSphere, 9 (5), e00073-e00024 .
doi:10.1128/msphere.00073-24 , hdl:10013/epic.5940fcf7-1cef-4560-b5fb-e5d94a47ee78
[thumbnail of New avenues for potentially seeking microbial responses to climate change beneath Antarctic ice shelves.pdf]
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Sundu, K. , Freitag, J. , Fourteau, K. and Löwe, H. (2024)
A microstructure-based parameterization of the effective anisotropic elasticity tensor of snow, firn, and bubbly ice ,
The Cryosphere, 18 (4), pp. 1579-1596 .
doi:10.5194/tc-18-1579-2024 , hdl:10013/epic.ebf6fe1e-4bfd-48d1-93be-ef34125c53e3
[thumbnail of tc-18-1579-2024.pdf]
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Abbott, P. M. , McConnell, J. R. , Chellman, N. J. , Kipfstuhl, S. , Hörhold, M. ORCID: https://orcid.org/0000-0002-9110-0909, Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440, Cook, E. , Hutchison, W. and Sigl, M. (2024)
Mid-to Late Holocene East Antarctic ice-core tephrochronology: Implications for reconstructing volcanic eruptions and assessing their climatic impacts over the last 5,500 years ,
Quaternary Science Reviews, 329 , p. 108544 .
doi:10.1016/j.quascirev.2024.108544 , hdl:10013/epic.48f0d903-e14a-47f6-8fa2-83a08db9296e
[thumbnail of 1-s2.0-S0277379124000453-main.pdf]
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Faïn, X. , Etheridge, D. M. , Fourteau, K. , Martinerie, P. , Trudinger, C. M. , Rhodes, R. H. , Chellman, N. J. , Langenfelds, R. L. , McConnell, J. R. , Curran, M. A. , Brook, E. J. , Blunier, T. , Teste, G. , Grilli, R. , Lemoine, A. , Sturges, W. T. , Vannière, B. , Freitag, J. and Chappellaz, J. (2023)
Southern Hemisphere atmospheric history of carbon monoxide over the late Holocene reconstructed from multiple Antarctic ice archives ,
Climate of the Past, 19 (11), pp. 2287-2311 .
doi:10.5194/cp-19-2287-2023 , hdl:10013/epic.815caea2-bd56-4ae7-bbaa-a427c8907530
[thumbnail of cp-19-2287-2023.pdf]
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Article
Hoffmann-Abdi, K. , Meyer, H. ORCID: https://orcid.org/0000-0003-4129-4706, Fernandoy, F. , Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440, Shaw, F. M. , Werner, M. ORCID: https://orcid.org/0000-0002-6473-0243, Thomas, E. R. , McConnell, J. R. and Schneider, C. (2023)
Deciphering stable water isotope records of firn cores from a strongly maritime, high-accumulation site on the Antarctic Peninsula ,
Journal of Glaciology, pp. 1-19 .
doi:10.1017/jog.2023.79 , hdl:10013/epic.97cc3717-8d9c-40a1-a06e-874af2a918bd
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Article
Wang, Z. , Chung, A. , Steinhage, D. ORCID: https://orcid.org/0000-0003-4737-9751, Parrenin, F. , Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440 and Eisen, O. ORCID: https://orcid.org/0000-0002-6380-962X (2023)
Mapping age and basal conditions of ice in the Dome Fuji region, Antarctica, by combining radar internal layer stratigraphy and flow modeling ,
The Cryosphere, 17 (10), pp. 4297-4314 .
doi:10.5194/tc-17-4297-2023 , hdl:10013/epic.91aee362-b6cc-43fa-9791-75bf989be89b
[thumbnail of tc-17-4903-2023.pdf]
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Article
Hirsch, N. , Zuhr, A. , Münch, T. , Hörhold, M. , Freitag, J. , Dallmayr, R. and Laepple, T. (2023)
Stratigraphic noise and its potential drivers across the plateau of Dronning Maud Land, East Antarctica ,
The Cryosphere, 17 (10), pp. 4207-4221 .
doi:10.5194/tc-17-4207-2023 , hdl:10013/epic.68ba8e1f-668b-44aa-8c4d-cf775ca6b119
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Hoffmann-Abdi, K. , Fernandoy, F. , Meyer, H. ORCID: https://orcid.org/0000-0003-4129-4706, Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440, Opel, T. ORCID: https://orcid.org/0000-0003-1315-8256, McConnell, J. R. and Schneider, C. (2023)
Correction: Hoffmann-Abdi et al. Short-Term Meteorological and Environmental Signals Recorded in a Firn Core from a High-Accumulation Site on Plateau Laclavere, Antarctic Peninsula. Geosciences 2021, 11, 428 ,
Geosciences, 13 (8), p. 237 .
doi:10.3390/geosciences13080237 , hdl:10013/epic.c000633b-bff1-4dcc-98c3-098200432ffe
[thumbnail of 147a_Hoffmann_Abdi_2021_MDPI_geoscience_Corrigendum.pdf]
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Westhoff, J. , Sinnl, G. , Svensson, A. , Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440, Kjær, H. A. , Vallelonga, P. , Vinther, B. M. , Kipfstuhl, S. ORCID: https://orcid.org/0000-0003-1495-5273, Dahl-Jensen, D. and Weikusat, I. ORCID: https://orcid.org/0000-0002-3023-6036 (2022)
Melt in the Greenland EastGRIP ice core reveals Holocene warm events ,
Climate of the Past, 18 , pp. 1011-1034 .
doi:10.5194/cp-18-1011-2022 , hdl:10013/epic.20a42087-f123-425d-9641-3c717d6adaf8
[thumbnail of westhoff2022cp.pdf]
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McConnell, J. R. , Chellman, N. J. , Mulvaney, R. , Eckhardt, S. , Stohl, A. , Plunkett, G. , Kipfstuhl, S. ORCID: https://orcid.org/0000-0003-1495-5273, Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440, Isaksson, E. , Gleason, K. E. , Brugger, S. O. , McWethy, D. B. , Abram, N. J. , Liu, P. and Aristarain, A. J. (2021)
Hemispheric black carbon increase after the 13th-century Māori arrival in New Zealand ,
Nature, 598 (7879), pp. 82-85 .
doi:10.1038/s41586-021-03858-9 , hdl:10013/epic.33efdf2f-adba-4ce3-980a-24da7a3a13a3

Article
Liu, P. , Kaplan, J. O. , Mickley, L. J. , Li, Y. , Chellman, N. J. , Arienzo, M. M. , Kodros, J. K. , Pierce, J. R. , Sigl, M. , Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440, Mulvaney, R. , Curran, M. A. J. and McConnell, J. R. (2021)
Improved estimates of preindustrial biomass burning reduce the magnitude of aerosol climate forcing in the Southern Hemisphere ,
Science Advances, 7 (22) .
doi:10.1126/sciadv.abc1379 , hdl:10013/epic.15197cac-a883-45c0-a950-d6a06aebb35d

Article
Dallmayr, R. , Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440, Hörhold, M. , Laepple, T. , Della-Lunga, D. and Wilhelms, F. ORCID: https://orcid.org/0000-0001-7688-3135 (2021)
A dual-tube sampling technique for snowpack studies ,
Journal of Glaciology, 67 (261), pp. 84-90 .
doi:10.1017/jog.2020.85 , hdl:10013/epic.0f141618-3675-411c-991f-f335a04a34b7
[thumbnail of dualtube_sampling_technique_for_snowpack_studies.pdf]
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Hoffmann-Abdi, K. , Fernandoy, F. , Meyer, H. ORCID: https://orcid.org/0000-0003-4129-4706, Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440, Opel, T. ORCID: https://orcid.org/0000-0003-1315-8256, McConnell, J. R. and Schneider, C. (2021)
Short-Term Meteorological and Environmental Signals Recorded in a Firn Core from a High-Accumulation Site on Plateau Laclavere, Antarctic Peninsula ,
Geosciences, 11 (10), p. 428 .
doi:10.3390/geosciences11100428 , hdl:10013/epic.affebd34-f8f0-4bd9-b859-41fc6b1dc506
[thumbnail of 150_Hoffmann_Abdi_2021_MDPI_geoscience.pdf]
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Weinhart, A. H. ORCID: https://orcid.org/0000-0003-2856-2630, Kipfstuhl, S. , Hörhold, M. ORCID: https://orcid.org/0000-0002-9110-0909, Eisen, O. ORCID: https://orcid.org/0000-0002-6380-962X and Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440 (2021)
Spatial Distribution of Crusts in Antarctic and Greenland Snowpacks and Implications for Snow and Firn Studies ,
Frontiers in Earth Science, 9 , p. 630070 .
doi:10.3389/feart.2021.630070 , hdl:10013/epic.ac797748-f660-4dca-8944-f0d49c258adc
[thumbnail of feart-09-630070.pdf]
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Kjær, H. A. , Lolk Hauge, L. , Simonsen, M. , Yoldi, Z. , Koldtoft, I. , Hörhold, M. ORCID: https://orcid.org/0000-0002-9110-0909, Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440, Kipfstuhl, S. , Svensson, A. and Vallelonga, P. (2021)
A portable lightweight in situ analysis (LISA) box for ice and snow analysis ,
The Cryosphere, 15 (8), pp. 3719-3730 .
doi:10.5194/tc-15-3719-2021 , hdl:10013/epic.f8682f6f-3ffa-49ed-aab1-ed9577d2caf2

Article
Weinhart, A. H. ORCID: https://orcid.org/0000-0003-2856-2630, Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440, Hörhold, M. ORCID: https://orcid.org/0000-0002-9110-0909, Kipfstuhl, S. ORCID: https://orcid.org/0000-0003-1495-5273 and Eisen, O. ORCID: https://orcid.org/0000-0002-6380-962X (2020)
Representative surface snow density on the East Antarctic Plateau ,
The Cryosphere, 14 (11), pp. 3663-3685 .
doi:10.5194/tc-14-3663-2020 , hdl:10013/epic.cc875138-aea9-40b5-85ef-a6a633f71e38
[thumbnail of tc-14-3663-2020.pdf]
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Hoffmann, K. , Fernandoy, F. , Meyer, H. ORCID: https://orcid.org/0000-0003-4129-4706, Thomas, E. R. , Aliaga, M. , Tetzner, D. , Freitag, J. , Opel, T. ORCID: https://orcid.org/0000-0003-1315-8256, Arigony-Neto, J. , Göbel, C. F. , Jaña, R. , Rodríguez Oroz, D. , Tuckwell, R. , Ludlow, E. , McConnell, J. R. and Schneider, C. (2020)
Stable water isotopes and accumulation rates in the Union Glacier region, Ellsworth Mountains, West Antarctica, over the last 35 years ,
The Cryosphere, 14 (3), pp. 881-904 .
doi:10.5194/tc-14-881-2020 , hdl:10013/epic.e08a5db2-d826-4c39-b9e9-925883abc1d9

Article
Moser, D. E. ORCID: https://orcid.org/0000-0002-9110-0909, Hörhold, M. ORCID: https://orcid.org/0000-0002-9110-0909, Kipfstuhl, S. and Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440 (2020)
Microstructure of Snow and Its Link to Trace Elements and Isotopic Composition at Kohnen Station, Dronning Maud Land, Antarctica ,
Frontiers in Earth Science, 8 , p. 23 .
doi:10.3389/feart.2020.00023 , hdl:10013/epic.77cce15f-b5e8-4471-ae62-178002fbda69
[thumbnail of feart-08-00023-1.pdf]
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Kokhanovsky, A. A. , Lamare, M. , Danne, O. , Brockmann, C. , Dumont, M. , Picard, G. , Arnaud, L. , Favier, V. , Jourdain, B. , Le Meur, E. , Di Mauro, B. , Aoki, T. , Niwano, M. , Rozanov, V. , Korkin, S. , Kipfstuhl, S. , Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440, Hörhold, M. ORCID: https://orcid.org/0000-0002-9110-0909, Zuhr, A. ORCID: https://orcid.org/0000-0002-3861-365X, Vladimirova, D. O. , Faber, A. K. , Steen-Larsen, H. C. , Wahl, S. , Andersen, J. K. , Vandecrux, B. , van As, D. , Mankoff, K. D. , Kern, M. , Zege, E. and Box, J. E. (2019)
Retrieval of Snow Properties from the Sentinel-3 Ocean and Land Colour Instrument ,
Remote Sensing, 11 (19), p. 2280 .
doi:10.3390/rs11192280 , hdl:10013/epic.e3bcca1b-0f9e-4eb0-9637-b79affdca77b
[thumbnail of remotesensing-11-02280-v3.pdf]
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Schlegel, R. , Diez, A. , Löwe, H. , Mayer, C. , Lambrecht, A. , Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440, Miller, H. , Hofstede, C. ORCID: https://orcid.org/0000-0002-6015-6918 and Eisen, O. ORCID: https://orcid.org/0000-0002-6380-962X (2019)
Comparison of elastic moduli from seismic diving-wave and ice-core microstructure analysis in Antarctic polar firn ,
Annals of Glaciology, 60 (79), pp. 220-230 .
doi:10.1017/aog.2019.10 , hdl:10013/epic.96658a91-2ae5-4f2a-94a8-a7cd0bd9c009
[thumbnail of Schlegel_etal_2019_AGlac-elastic-moduli-firn.pdf]
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Schaller, C. F. , Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440 and Eisen, O. ORCID: https://orcid.org/0000-0002-6380-962X (2017)
Critical porosity of gas enclosure in polar firn independent of climate ,
Climate of the Past, 13 , pp. 1685-1693 .
doi:10.5194/cp-13-1685-2017 , hdl:10013/epic.f0a665ac-02f9-4c48-9cc1-a28795ddb0a6
[thumbnail of Schaller_CP_2017.pdf]
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Münch, T. ORCID: https://orcid.org/0000-0002-5492-7544, Kipfstuhl, S. , Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440, Meyer, H. ORCID: https://orcid.org/0000-0003-4129-4706 and Laepple, T. ORCID: https://orcid.org/0000-0001-8108-7520 (2017)
Constraints on post-depositional isotope modifications in East Antarctic firn from analysing temporal changes of isotope profiles ,
The Cryosphere, 11 (5), pp. 2175-2188 .
doi:10.5194/tc-11-2175-2017 , hdl:10013/epic.51602
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Carlsen, T. , Birnbaum, G. ORCID: https://orcid.org/0000-0002-0252-6781, Ehrlich, A. , Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440, Heygster, G. , Istomina, L. , Kipfstuhl, S. , Orsi, A. , Schaefer, M. and Wendisch, M. (2017)
Comparison of different methods to retrieve optical-equivalent snow grain size in central Antarctica ,
The Cryosphere, 11 , pp. 2727-2741 .
doi:10.5194/tc-11-2727-2017
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Karlsson, N. B. , Eisen, O. ORCID: https://orcid.org/0000-0002-6380-962X, Dahl-Jensen, D. , Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440, Kipfstuhl, S. , Lewis, C. , Nielsen, L. T. , Paden, J. , Winter, A. and Wilhelms, F. ORCID: https://orcid.org/0000-0001-7688-3135 (2016)
Accumulation Rates during 1311–2011 CE in North-Central Greenland Derived from Air-Borne Radar Data ,
Frontiers in Earth Science, 4 , p. 97 .
doi:10.3389/feart.2016.00097 , hdl:10013/epic.48973
[thumbnail of karlssonetal2016.pdf]
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Schaller, C. F. , Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440, Kipfstuhl, S. , Laepple, T. ORCID: https://orcid.org/0000-0001-8108-7520, Steen-Larsen, H. C. and Eisen, O. ORCID: https://orcid.org/0000-0002-6380-962X (2016)
A representative density profile of the North Greenland snowpack ,
The Cryosphere, 10 (5), pp. 1991-2002 .
doi:10.5194/tc-10-1991-2016 , hdl:10013/epic.48741
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Münch, T. ORCID: https://orcid.org/0000-0002-5492-7544, Kipfstuhl, S. , Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440, Meyer, H. ORCID: https://orcid.org/0000-0003-4129-4706 and Laepple, T. ORCID: https://orcid.org/0000-0001-8108-7520 (2016)
Regional climate signal vs. local noise: a two-dimensional view of water isotopes in Antarctic firn at Kohnen station, Dronning Maud Land ,
Climate of the Past, 12 , pp. 1565-1581 .
doi:10.5194/cp-12-1565-2016 , hdl:10013/epic.46413
[thumbnail of cp-12-1565-2016.pdf]
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Ritter, F. , Steen-Larsen, H. C. , Werner, M. ORCID: https://orcid.org/0000-0002-6473-0243, Masson-Delmotte, V. , Orsi, A. , Behrens, M. ORCID: https://orcid.org/0000-0001-9275-4333, Birnbaum, G. ORCID: https://orcid.org/0000-0002-0252-6781, Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440, Risi, C. and Kipfstuhl, S. (2016)
Isotopic exchange on the diurnal scale between near-surface snow and lower atmospheric water vapor at Kohnen station, East Antarctica ,
The Cryosphere, 10 , pp. 1647-1663 .
doi:10.5194/tc-10-1647-2016 , hdl:10013/epic.48316
[thumbnail of Ritter_Isotopic_exchange_on_the_diurnal_scale_between_near-surface_snow_and_lower_atmospheric_water_vapor_at_Kohnen_station_East_Antarctica_Cryosphere-2016.pdf]
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Laepple, T. ORCID: https://orcid.org/0000-0001-8108-7520, Hörhold, M. , Münch, T. ORCID: https://orcid.org/0000-0002-5492-7544, Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440, Wegner, A. and Kipfstuhl, S. (2016)
Layering of surface snow and firn at Kohnen Station, Antarctica - noise or seasonal signal? ,
Journal of Geophysical Research: Earth Surface, 121 , pp. 1849-1860 .
doi:10.1002/2016JF003919 , hdl:10013/epic.48734
[thumbnail of Laepple_et_al-2016-Journal_of_Geophysical_Research__Earth_Surface.pdf]
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Rhodes, R. H. , Faïn, X. , Brook, E. J. , McConnell, J. R. , Maselli, O. J. , Sigl, M. , Edwards, J. , Buizert, C. , Blunier, T. , Chappellaz, J. and Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440 (2016)
Local artifacts in ice core methane records caused by layered bubble trapping and in situ production: a multi-site investigation ,
Climate of the Past, 12 (4), pp. 1061-1077 .
doi:10.5194/cp-12-1061-2016 , hdl:10013/epic.49832
[thumbnail of rhodesetal2016.pdf]
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Kronenberger, M. , Wirjadi, O. , Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440 and Hagen, H. (2015)
Gaussian curvature using fundamental forms for binary voxel data ,
Graphical Models, 82 , pp. 123-136 .
doi:10.1016/j.gmod.2015.06.009 , hdl:10013/epic.51086

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Christmann, J. , Müller, R. , Webber, K. , Isaia, D. , Schader, F. , Kipfstuhl, S. , Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440 and Humbert, A. (2015)
Measurement of fracture toughness of polycrystalline bubbly ice from an Antarctic ice core ,
Earth Syst. Sci. Data, 7 , pp. 87-92 .
doi:10.5194/essd-7-87-2015 , hdl:10013/epic.48956
[thumbnail of essd-7-87-2015.pdf]
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Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440, Kipfstuhl, S. , Laepple, T. ORCID: https://orcid.org/0000-0001-8108-7520 and Wilhelms, F. ORCID: https://orcid.org/0000-0001-7688-3135 (2013)
Impurity-controlled densification: a new model for stratified polar firn ,
Journal of Glaciology, 59 (218), pp. 1163-1169 .
doi:10.3189/2013JoG13J042 , hdl:10013/epic.42658
[thumbnail of freitagetal2013_firnmodel.pdf]
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Hubbard, B. , Tison, J. L. , Philippe, M. , Heene, B. , Pattyn, F. , Malone, T. and Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440 (2013)
Ice shelf density reconstructed from optical televiewer borehole logging ,
Geophysical Research Letters, 40 (22), pp. 5882-5887 .
doi:10.1002/2013GL058023 , hdl:10013/epic.42690
[thumbnail of grl51094.pdf]
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Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440, Kipfstuhl, S. and Laepple, T. ORCID: https://orcid.org/0000-0001-8108-7520 (2013)
Core-scale radioscopic imaging: a new method reveals density-calcium link in Antarctic firn ,
J. Glaciol., 59 (218), pp. 1009-1014 .
doi:10.3189/2013JoG13J028 , hdl:10013/epic.42155
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Article
Binder, T. , Garbe, C. S. , Wagenbach, D. , Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440 and Kipfstuhl, S. (2013)
Extraction and parametrization of grain boundary networks in glacier ice, using a dedicated method of automatic image analysis ,
Journal of Microscopy, 250 (2), pp. 130-141 .
doi:10.1111/jmi.12029 , hdl:10013/epic.41389

Article
Bendel, V. , Ueltzhöffer, K. J. , Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440, Kipfstuhl, S. , Kuhs, W. , Garbe, C. S. and Faria, S. H. (2013)
High-resolution variations in size, number and arrangement of air bubbles in the EPICA DML (Antarcitca) ice core ,
Journal of Glaciology, 59 (217), pp. 972-980 .
doi:10.3189/2013JoG12J245 , hdl:10013/epic.42156
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Article
Weikusat, C. , Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440 and Kipfstuhl, S. (2012)
Raman spectroscopy of gaseous inclusions in EDML ice core: First results - microbubbles ,
Journal of Glaciology, 58 (210), pp. 761-766 .
doi:10.3189/2012JoG11J222 , hdl:10013/epic.39700

Article
Linow, S. , Hörhold, M. and Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440 (2012)
Grain-size evolution of polar firn: a new empirical grain growth parameterization based on X-ray microcomputer tomography measurements ,
Journal of Glaciology, 58 (212), pp. 1245-1252 .
doi:10.3189/2012JoG11J256 , hdl:10013/epic.40394

Article
Hörhold, M. , Laepple, T. ORCID: https://orcid.org/0000-0001-8108-7520, Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440, Bigler, M. , Fischer, H. and Kipfstuhl, S. (2012)
On the impact of impurities on the densification of polar firn ,
Earth and Planetary Science Letters, 325-32 , pp. 93-99 .
doi:10.1016/j.epsl.2011.12.022 , hdl:10013/epic.41153
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Article
Hörhold, M. , Kipfstuhl, S. , Wilhelms, F. ORCID: https://orcid.org/0000-0001-7688-3135, Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440 and Frenzel, A. (2011)
The densification of layered polar firn ,
JOURNAL OF GEOPHYSICAL RESEARCH, VOL. 116, F01001PP., 15 .
doi:10.1029/2009JF001630 , hdl:10013/epic.37133
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Article
Faria, S. H. , Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440 and Kipfstuhl, S. (2010)
Polar ice structure and the integrity of ice-core paleoclimate records ,
Journal of Quaternary Science Reviews, 29 (1-2), Climate of the Last Million Years: New Insights from EPICA and Other Records, pp. 338-351 .
doi:10.1016/j.quascirev.2009.10.016 , hdl:10013/epic.34411

Article
Birnbaum, G. ORCID: https://orcid.org/0000-0002-0252-6781, Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440, Brauner, R. , König-Langlo, G. , Schulz, E. , Kipfstuhl, S. , Oerter, H. , Reijmer, C. H. , Schlosser, E. , Faria, S. H. , Ries, H. , Loose, B. , Herber, A. ORCID: https://orcid.org/0000-0001-6651-3835, Duda, M. G. , Powers, J. G. , Manning, K. W. and Van den Broeke, M. R. (2010)
Strong-wind events and their influence on the formation of snow dunes: Observations from Kohnen Station, Dronning Maud Land, Antarctica ,
Journal of Glaciology, 56 (199), pp. 891-902 .
hdl:10013/epic.36095
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Article
Redenbach, C. , Särkkä, A. , Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440 and Schladitz, K. (2009)
Anisotropy analysis of pressed point processes ,
Advances in Statistical Analysis, pp. 1-25 .
doi:10.1007/s10182-009-0106-5 , hdl:10013/epic.32441

Article
Kipfstuhl, S. , Faria, S. H. , Azuma, N. , Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440, Weikusat, I. ORCID: https://orcid.org/0000-0002-3023-6036, Kaufmann, P. , Miller, H. , Weiler, K. and Wilhelms, F. ORCID: https://orcid.org/0000-0001-7688-3135 (2009)
Evidence of dynamic recrystallization in polar firn ,
Journal of Geophysical Research, 114, B05204. .
doi:10.1029/2008JB005583 , hdl:10013/epic.34410
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Article
Hörhold, M. , Albert, M. R. and Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440 (2009)
The impact of accumulation rate on anisotropy and air permeability of polar firn at a high accumulation site ,
Journal of Glaciology, 55 (192), pp. 625-630 .
hdl:10013/epic.33525

Article
Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440, Kipfstuhl, S. and Faria, S. H. (2008)
The connectivity of crystallite agglomerates in low-density firn at Kohnen station, Dronning Maud Land, Antarctica ,
Ann. Glaciol., 49 , pp. 114-120 .
hdl:10013/epic.31526

Article
Abegg, F. , Bohrmann, G. , Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440 and Kuhs, W. (2007)
Fabric of gas hydrate in sediments from Hydrate Ridge - Results from ODP Leg 204 samples. ,
Geo-Marine Letters, 27 , pp. 269-277 .
doi:10.1007/s00367-007-0080-4 , hdl:10013/epic.32431

Article
Landais, A. , Barnola, J. M. , Kawamura, K. , Caillon, N. , Delmotte, M. , Van Ommen, T. , Dreyfus, G. , Jouzel, J. , Masson-Delmotte, V. , Minster, B. , Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440, Leuenberger, M. , Schwander, J. , Huber, C. , Etheridge, D. and Morgan, V. (2006)
Firn-air d15N in modern polar sites and glacial-interglacial ice: a model-data mismatch during glacial periods in Antarctica? ,
Quaternary science reviews, 25 (1), pp. 49-62 .
doi:10.1016/j.quascirev.2005.06.007 , hdl:10013/epic.25212

Article
Kipfstuhl, S. , Hamann, I. ORCID: https://orcid.org/0000-0002-3023-6036, Lambrecht, A. , Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440, Faria, S. H. , Grigoriev, D. and Azuma, N. (2006)
Microstructure mapping: a new method for imaging deformation-induced microstructural features of ice on the grain scale ,
Journal of glaciology, 52 (178), pp. 398-406 .
hdl:10013/epic.27838
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Article
EPICA Community Members, T. , Barbante, C. , Barnola, J. M. , Becagli, S. , Beer, J. , Bigler, M. , Boutron, C. , Blunier, T. , Castellano, E. , Cattani, O. , Chappellaz, J. , Dahl-Jensen, D. , Debret, M. , Delmonte, B. , Dick, D. , Falourd, S. , Faria, S. , Federer, U. , Fischer, H. , Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440, Frenzel, A. , Fritzsche, D. ORCID: https://orcid.org/0000-0002-0018-8993, Fundel, F. , Gabrielli, P. , Gaspari, V. , Gersonde, R. , Graf, W. , Grigoriev, D. , Hamann, I. ORCID: https://orcid.org/0000-0002-3023-6036, Hansson, M. , Hoffmann, G. , Hutterli, M. A. , Huybrechts, P. , Isaksson, E. , Johnsen, S. , Jouzel, J. , Kaczmarska, M. , Karlin, T. , Kaufmann, P. , Kipfstuhl, S. , Kohno, M. , Lambert, F. , Lambrecht, A. , Lambrecht, A. , Landais, A. , Lawer, G. , Leuenberger, M. , Littot, G. , Loulergue, L. , Lüthi, D. , Maggi, V. , Marino, F. , Masson-Delmotte, V. , Meyer, H. ORCID: https://orcid.org/0000-0003-4129-4706, Miller, H. , Mulvaney, R. , Narcisi, B. , Oerlemans, J. , Oerter, H. , Parrenin, F. , Petit, J. R. , Raisbeck, G. , Raynaud, D. , Röthlisberger, R. , Ruth, U. , Rybak, O. , Severi, M. , Schmitt, J. , Schwander, J. , Siegenthaler, U. , Siggaard-Andersen, M. L. , Spahni, R. , Steffensen, J. P. , Stenni, B. , Stocker, T. F. , Tison, J. L. , Traversi, R. , Udisti, R. , Valero-Delgado, F. , van den Broeke, M. R. , van de Wal, R. S. W. , Wagenbach, D. , Wegner, A. , Weiler, K. , Wilhelms, F. ORCID: https://orcid.org/0000-0001-7688-3135, Winther, J. G. and Wolff, E. (2006)
One-to-one coupling of glacial climate variability in Greenland and Antarctica ,
Nature, 444 (7116), pp. 195-198 .
doi:10.1038/nature05301 , hdl:10013/epic.41684
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Article
Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440, Wilhelms, F. ORCID: https://orcid.org/0000-0001-7688-3135 and Kipfstuhl, S. (2004)
Microstructure dependent densification of polar firn derived from X-ray microtomography ,
Journal of glaciology, 50, 169 , pp. 243-250 .
hdl:10013/epic.19834

Article
Eisen, O. ORCID: https://orcid.org/0000-0002-6380-962X, Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440, Haas, C. ORCID: https://orcid.org/0000-0002-7674-3500, Rack, W. , Rotschky, G. and Schmitt, J. (2003)
Bowling mermaids; or How do fresh water ice balls form? ,
Journal of Glaciology, 49, 167 , pp. 605-606 .
hdl:10013/epic.19024
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Article
Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440 and Eicken, H. (2003)
Meltwater circulation and permeability of Arctic summer sea ice derived from hydrological field experiments ,
Journal of Glaciology, Vol 49, pp. 349-358 .
hdl:10013/epic.15219
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Article
Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440, Dobrindt, U. and Kipfstuhl, S. (2002)
A new method for predicting transport properties of polar firn with respect to gases on the pore space scale ,
Annals of Glaciology, 35 , pp. 538-544 .
hdl:10013/epic.15220
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Article
Eicken, H. , Kolatschek, J. , Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440, Lindemann, F. , Kassens, H. and Dmitrenko, I. (2000)
A key source area and constraints on entrainment for basin-scale sediment transport by Arctic sea ice ,
Geophysical Research Letters, 27 (13), pp. 1919-1922 .
hdl:10013/epic.15221
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Inbook

Inbook
Binder, T. , Weikusat, I. ORCID: https://orcid.org/0000-0002-3023-6036, Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440, Garbe, C. S. , Wagenbach, D. and Kipfstuhl, S. (2013)
Microstructure through an Ice Sheet / Barnett, M. (editor) ,
In: Recrystallization and Grain Growth V, Materials Science Forum, Zurich, Switzerland, Trans Tech Publications, 590 p., ISBN: 978-3-03785-688-8 .
doi:10.4028/www.scientific.net/MSF.753.481 , hdl:10013/epic.41351

Inbook
Eicken, H. , Weissenberger, J. , Bussmann, I. ORCID: https://orcid.org/0000-0002-1197-7461, Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440, Schuster, W. , Delgado, F. V. , Evers, K. , Jochmann, P. , Krembs, C. , Gradinger, R. , Lindemann, F. , Cottier, F. , Hall, R. , Wadhams, P. , Reisemann, M. , Kuosa, H. , Ikävalko, J. , Leonard, G. H. , Shen, H. , Ackley, S. and Smedsrud, L. H. (1998)
Ice-tank studies of physical and biological sea-ice processes, in ,
Ice in surface waters, H. Shen, Editor. , Balkema: Rotterdam .
hdl:10013/epic.31852

Conference

Conference -Poster
Freitag, J. and Salamon, M. (2024)
Digital twins: fast flyby X-ray CT of polar firn
hdl:10013/epic.c9f10ba1-1393-496b-9098-50573823c161
[thumbnail of PosterEGU2024_jfreitag.pdf]
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Conference -Lecture
Freitag, J. (2024)
Ice sample and data management with CaosDB in the Glaciology section at AWI
hdl:10013/epic.4c98beba-e0c2-4c2d-9d09-b9e79634bc2a
[thumbnail of ASDM2024_jfreitag.pdf]
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Conference -Lecture
Freitag, J. (2023)
X-ray computer tomography of polar firn - how snow transforms to ice
hdl:10013/epic.03d03686-5681-4837-91ea-32b90a127fac
[thumbnail of HU-UB-workshop_JF.pdf]
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Conference -Poster
Westhoff, J. , Weikusat, I. ORCID: https://orcid.org/0000-0002-3023-6036, Blunier, T. , Bons, P. , Dyonisius, M. , Fain, X. , Franke, S. ORCID: https://orcid.org/0000-0001-8462-4379, Freitag, J. , Jansen, D. , Kerch, J. , Kipfstuhl, J. , Kjær, H. A. , Martinerie, P. , Sinnl, G. , Steffensen, J. P. , Stoll, N. , Svensson, A. , Vallelonga, P. , Vinther, B. and Dahl-Jensen, D. (2022)
Visual Stratigraphy of the EastGRIP Ice Core - Of the Lost Ice Core Orientation, Deformation Structures, Extreme Warm Events, and Trapped Ancient Air
hdl:10013/epic.d19acaa6-93ae-44e2-852a-8ffda7a2b050
[thumbnail of IPICS_ThesisPoster_v2_online(1).pdf]
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Conference -Poster
Stichel, T. ORCID: https://orcid.org/0000-0002-5925-1301, Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440, Henkel, S. ORCID: https://orcid.org/0000-0001-7490-0237, Geibert, W. ORCID: https://orcid.org/0000-0001-8646-2334 and Kasten, S. ORCID: https://orcid.org/0000-0001-7453-5137 (2022)
Marine Ice: A sleeping iron giant in the Southern Ocean? ,
SPP Antarctic Research Coordination Workshop 2022, Bielefeld, 11 September 2022 - 13 September 2022 .
hdl:10013/epic.e381ff6d-efc8-46d7-985c-7ad2deec1798

Conference -Poster
Stichel, T. ORCID: https://orcid.org/0000-0002-5925-1301, Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440, Henkel, S. ORCID: https://orcid.org/0000-0001-7490-0237, Geibert, W. ORCID: https://orcid.org/0000-0001-8646-2334 and Kasten, S. ORCID: https://orcid.org/0000-0001-7453-5137 (2022)
Marine Ice: A sleeping iron giant in the Southern Ocean? ,
Goldschmidt Conference 2022, Honolulu, USA, 11 July 2022 - 15 July 2022 .
hdl:10013/epic.72c656ce-c0aa-4591-b2a5-f0a0f11f503c
[thumbnail of Marine-Ingot.pdf]
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Conference -Poster
Münch, T. ORCID: https://orcid.org/0000-0002-5492-7544, Hörhold, M. ORCID: https://orcid.org/0000-0002-9110-0909, Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440, Behrens, M. ORCID: https://orcid.org/0000-0001-9275-4333 and Laepple, T. ORCID: https://orcid.org/0000-0001-8108-7520 (2021)
A simple forward model of known processes explains trench-average d18O at EDML, East Antarctica ,
EGU General Assembly 2021, Online, 19 April 2021 - 30 April 2021 .
hdl:10013/epic.a2540d81-c899-4b14-898e-e253b0188fa1

Conference -Poster
Münch, T. ORCID: https://orcid.org/0000-0002-5492-7544, Hörhold, M. ORCID: https://orcid.org/0000-0002-9110-0909, Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440, Behrens, M. ORCID: https://orcid.org/0000-0001-9275-4333 and Laepple, T. ORCID: https://orcid.org/0000-0001-8108-7520 (2020)
Testing the ideal ice-core record for past temperature reconstructions using combined isotope and impurity analyses ,
EGU Sharing Geoscience Online, Online, 4 May 2020 - 8 May 2020 .
doi:10.5194/egusphere-egu2020-15866 , hdl:10013/epic.32b80318-e6de-4283-bb65-e1bacc0b6e2e

Conference -Talk
Schlemmer, A. , tom Wörden, H. , Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440, Fitschen, T. , Kerch, J. ORCID: https://orcid.org/0000-0002-7200-6837, Schlomann, Y. , Hornung, D. , Weikusat, I. ORCID: https://orcid.org/0000-0002-3023-6036, Parlitz, U. , Wilhelms, F. ORCID: https://orcid.org/0000-0001-7688-3135 and Luther, S. (2019)
Evaluation of the semantic research data management system CaosDB in glaciology ,
deRSE19 - Konferenz für ForschungssoftwareentwicklerInnen in Deutschland, Potsdam, Germany, 4 June 2019 - 6 June 2019 .
hdl:10013/epic.ad5019dc-ce77-4bcf-a861-d6bee0707777

Conference -Talk
Schlegel, R. , Diez, A. , Löwe, H. , Mayer, C. , Lambrecht, A. , Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440, Miller, H. , Hofstede, C. ORCID: https://orcid.org/0000-0002-6015-6918 and Eisen, O. ORCID: https://orcid.org/0000-0002-6380-962X (2019)
Comparison of elastic moduli from seismic diving-wave and ice-core microstructure analysis in Antarctic polar firn ,
EGU General Assembly, Vienna, 7 April 2019 - 12 April 2019 .
hdl:10013/epic.63469c1a-aace-47e7-91e2-623546010102
[thumbnail of EGU2019-121.pdf]
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Conference -Talk
Eisen, O. ORCID: https://orcid.org/0000-0002-6380-962X, Kerch, J. ORCID: https://orcid.org/0000-0002-7200-6837, Eichler, J. , Binder, T. , Bohleber, P. , Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440, Bons, P. D. and Weikusat, I. ORCID: https://orcid.org/0000-0002-3023-6036 (2018)
Extreme spatial variability of crystal fabric in an Alpine ice core - a plea for high-res continuous fabric data on all ice cores ,
22nd Alpine Glaciology Meeting, Chamonix, 1 March 2018 - 2 March 2018 .
hdl:10013/epic.07a27d8e-d78f-4343-94b7-e70bebf8075e

Conference -Talk
Schaller, C. F. , Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440, Sowers, T. , Vinther, B. , Weinhart, A. ORCID: https://orcid.org/0000-0003-2856-2630 and Eisen, O. ORCID: https://orcid.org/0000-0002-6380-962X (2017)
In-situ observation of bubble trapping in polar firn ,
EGU General Assembly, Vienna, 23 April 2017 - 28 April 2017 .
hdl:10013/epic.05b61388-a40d-4e9d-968e-b76257565c78
[thumbnail of EGU2017-14721-1.pdf]
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Conference -Invited talk
Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440 (2017)
Computertomografie von Schnee und Eis ,
Heidelberger Bildverarbeitungsforum, Fürth, Germany, 7 March 2017 - 7 March 2017 .
hdl:10013/epic.50623
[thumbnail of ComputertomografievonSchneeundEis.pdf]
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Conference -Poster
Carlsen, T. , Belke Brea, M. , Birnbaum, G. ORCID: https://orcid.org/0000-0002-0252-6781, Ehrlich, A. , Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440, Heygster, G. , Istomina, L. , Humbert, A. , Kipfstuhl, S. , Koenig-Langlo, G. , Orsi, A. , Schaefer, M. and Wendisch, M. (2016)
Spatio-temporal variability of snow surface albedo and grain size derived from airborne and ground-based observations in Antarctica ,
SCAR Open Science Conference, Kuala Lumpur, Malaysia, 22 August 2016 - 26 August 2016 .
hdl:10013/epic.48525

Conference -Talk
Karlsson, N. , Eisen, O. ORCID: https://orcid.org/0000-0002-6380-962X, Nielsen, L. T. , Kipfstuhl, S. , Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440, Paden, J. , Dahl-Jensen, D. , Winter, A. and Wilhelms, F. ORCID: https://orcid.org/0000-0001-7688-3135 (2016)
Accumulation rates from central North Greenland during the past 700yr ,
EGU General Assembly 2016, Vienna, Austria, 17 April 2016 - 22 April 2016 .
hdl:10013/epic.47805

Conference -Talk
Carlsen, T. , Birnbaum, G. ORCID: https://orcid.org/0000-0002-0252-6781, Ehrlich, A. , Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440, Heygster, G. , Istomina, L. , Kipfstuhl, S. , Orsi, A. , Schaefer, M. and Wendisch, M. (2016)
Observations of snow properties in Antarctica ,
International Radiation Symposium, Auckland, New Zealand, 16 April 2016 - 22 April 2016 .
hdl:10013/epic.47767

Conference -Poster
Karlsson, N. B. , Eisen, O. ORCID: https://orcid.org/0000-0002-6380-962X, Nielsen, L. T. , Kipfstuhl, S. , Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440, Paden, J. , Dahl-Jensen, D. , Winter, A. and Wilhelms, F. ORCID: https://orcid.org/0000-0001-7688-3135 (2016)
Accumulation rates from central North Greenland during the past 700 year ,
Second Open Science Conference of the International Partnerships in Ice Core Sciences (IPICS2016), Hobart, Australia, 17 March 2016 - 22 March 2016 .
hdl:10013/epic.47799

Conference -Poster
Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440, Schaller, C. , Kipfstuhl, S. , Vinther, B. M. and Svensson, A. (2016)
Bubble observations and analysis of the Renland ice core ,
Second IPICS Open Science Meeting, Hobart, Australia, 7 March 2016 - 11 March 2016 .
hdl:10013/epic.49829
[thumbnail of jfreitag_ipics2016_renlandbubbles_lowres.pdf]
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Conference -Poster
Belke Brea, M. , Birnbaum, G. ORCID: https://orcid.org/0000-0002-0252-6781, Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440, Kipfstuhl, S. , Humbert, A. , Schaefer, M. , König-Langlo, G. and Loose, B. (2015)
The impact of specific surface area and clouds on surface albedo: Investigations made at Kohnen Station, Antarctica, during summer 2013/2014 ,
26th International Congress on Polar Research, Munich, Germany, 6 September 2015 - 11 September 2015 .
hdl:10013/epic.45957
[thumbnail of Poster_Belke-Brea_20150906.pdf]
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Conference -Poster
Carlsen, T. , Belke Brea, M. , Birnbaum, G. ORCID: https://orcid.org/0000-0002-0252-6781, Ehrlich, A. , Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440, Schaefer, M. and Wendisch, M. (2015)
Airborne and in situ ground-based measurements of surface albedo, bidirectional reflectivity BRDF and snow properties on the Antarctic plateau ,
Koordinationsworkshop DFG-Schwerpunktprogramm 1158 - Antarktisforschung, Frankfurt am Main, 30 September 2015 - 2 October 2015 .
hdl:10013/epic.46081

Conference -Poster
Münch, T. ORCID: https://orcid.org/0000-0002-5492-7544, Kipfstuhl, S. , Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440, Meyer, H. ORCID: https://orcid.org/0000-0003-4129-4706 and Laepple, T. ORCID: https://orcid.org/0000-0001-8108-7520 (2015)
Signal vs. Noise: Obtaining a representative d18O record in a low-accumulation region ,
EGU General Assembly 2015, Vienna, Austria, 12 April 2015 - 17 April 2015 .
hdl:10013/epic.45778
[thumbnail of poster_egu2015.pdf]
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Conference -Poster
Münch, T. ORCID: https://orcid.org/0000-0002-5492-7544, Kipfstuhl, S. , Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440, Meyer, H. ORCID: https://orcid.org/0000-0003-4129-4706 and Laepple, T. ORCID: https://orcid.org/0000-0001-8108-7520 (2015)
Signal vs. Noise: Obtaining a representative d18O record in a low-accumulation region ,
36th Meeting of the AWI Scientific Advisory Board (SAB), 6 May 2015 - 7 May 2015 .
hdl:10013/epic.45779
[thumbnail of poster_ThomasMuench.pdf]
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Conference -Poster
Hörhold, M. , Linow, S. and Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440 (2014)
Accounting for the layering of snow and firn - on the link between density and grain size variability ,
Microstructure in Snow Microwave Radiative Transfer (MICROSNOW) Workshop, University of Reading, 6 August 2014 - 8 August 2014 .
hdl:10013/epic.44265
[thumbnail of microsnow.pdf]
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Conference -Poster
Klein, K. , Schneebeli, M. , Birnbaum, G. ORCID: https://orcid.org/0000-0002-0252-6781, Reijmer, C. H. and Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440 (2014)
Cascading decrease of the surface snow SSA at Kohnen Station, DML, Antarctica ,
EGU General Assembly 2014, Vienna, 28 April 2014 - 2 May 2014 .
hdl:10013/epic.43620
[thumbnail of KatharinaKlein_EGU2014.pdf]
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Conference -Poster
Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440, Kipfstuhl, S. , Vinther, B. M. , Popp, T. J. , Hoerz, S. and Eling, L. (2014)
Melt layer statistic of two firn cores recently drilled at Dye3 and South Dome in the dry snow zone of Southern Greenland ,
EGU general assembly, Vienna, Austria, 27 April 2014 - 2 May 2014 .
hdl:10013/epic.49825
[thumbnail of Freitag_et_al_EGU2014lowres.pdf]
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Conference -Poster
Münch, T. ORCID: https://orcid.org/0000-0002-5492-7544, Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440, Meyer, H. ORCID: https://orcid.org/0000-0003-4129-4706, Kipfstuhl, S. and Laepple, T. ORCID: https://orcid.org/0000-0001-8108-7520 (2014)
Two-dimensional insights into the signal formation in low-accumulation firn-cores ,
EGU General Assembly 2014, Vienna, Austria, 27 April 2014 - 2 May 2014 .
hdl:10013/epic.45777

Conference -Talk
Binder, T. , Weikusat, I. ORCID: https://orcid.org/0000-0002-3023-6036, Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440, Garbe, C. S. , Wagenbach, D. and Kipfstuhl, S. (2013)
Automated microstructure characterization through deep ice cores using sublimation etching ,
5th International Conference on Recrystallization & Grain Growth, Sydney, 5 May 2013 - 10 May 2013 .
hdl:10013/epic.43564
[thumbnail of ReXGG2013_Binder.pdf]
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Conference -Poster
Birnbaum, G. ORCID: https://orcid.org/0000-0002-0252-6781, Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440 and Klein, K. (2013)
In situ measurements of snow properties and surface albedo at Kohnen Station, East Antarctic Plateau to improve prognostic snow models ,
Snow Grain Size Workshop, Grenoble, France, 2 April 2013 - 5 April 2013 .
hdl:10013/epic.41380

Conference -Invited talk
Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440, Kipfstuhl, S. , Laepple, T. ORCID: https://orcid.org/0000-0001-8108-7520 and Klein, K. (2013)
Modeling delta-age distributions of enclosed air in layered firn ,
PIRE-Firn Workshop, La Jolla, San Diego, USA, 21 September 2013 - 26 September 2013 .
hdl:10013/epic.49845
[thumbnail of Pire2013JF.pdf]
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Conference -Poster
Binder, T. , Weikusat, I. ORCID: https://orcid.org/0000-0002-3023-6036, Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440, Svensson, A. , Wagenbach, D. , Garbe, C. S. and Kipfstuhl, S. (2013)
Properties of grain boundary networks in the NEEM ice core ,
EGU General Assembly 2013, Vienna, 7 April 2013 - 12 April 2013 .
hdl:10013/epic.41354
[thumbnail of EGU2013-4764.pdf]
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Conference -Poster
Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440, Kipfstuhl, S. , Klein, K. , Wegner, A. , Wilhelms, F. ORCID: https://orcid.org/0000-0001-7688-3135 and Bigler, M. (2012)
Shifts in the gas age scales of the EDML and EDC ice cores suggested by a new model for impurity controlled firn densification ,
IPICS International Partnerships in Ice Core Sciences, PresQuile de Giens, France, 1 October 2012 - 5 October 2012 .
hdl:10013/epic.42158

Conference -Poster
Klein, K. and Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440 (2012)
Direct observations of pore close-off in stratified firn by means of large scale X-ray computer tomography ,
Open Science Conference IPICS 2012, Giens, France, 1 October 2012 - 5 October 2012 .
hdl:10013/epic.43619
[thumbnail of IPICS_2012_KKlein.pdf]
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Conference -Invited talk
Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440, Kipfstuhl, S. , Hörhold, M. , Wegner, A. , Wilhelms, F. ORCID: https://orcid.org/0000-0001-7688-3135 and Bigler, M. (2012)
Impurity controlled firn densification: a new model approach ,
PIRE Firn workshop, PresQuile de Giens, France, 29 September 2012 - 31 September 2012 .
hdl:10013/epic.42159

Conference -Talk
Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440, Kipfstuhl, S. , Hörhold, M. , Wegner, A. , Wilhelms, F. ORCID: https://orcid.org/0000-0001-7688-3135 and Bigler, M. (2012)
Impurity controlled firn densification ,
EGU Meeting, Vienna, 22 April 2012 - 27 April 2012 .
hdl:10013/epic.42161

Conference -Poster
Weißbach, S. , Wegner, A. , Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440 and Kipfstuhl, S. (2012)
The influence of impurities on the densification of firn -a case study from North Greenland ,
Geophysical Research Abstracts Vol. 14, EGU2012-10143, EGU General Assembly, Vienna, 22 April 2012 - 27 April 2012 .
hdl:10013/epic.39264
[thumbnail of epic-egu.pdf]
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Conference -Poster
Weikusat, C. , Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440 and Kipfstuhl, S. (2011)
Raman spectroscopy of bubbles and microbubbles in EDML antarctic ice core ,
Geophysical Research Abstracts Vol. 13, EGU2011-7178 .
hdl:10013/epic.37353
[thumbnail of Fulltext]
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Conference -Poster
Behrens, M. ORCID: https://orcid.org/0000-0001-9275-4333, Kipfstuhl, S. and Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440 (2010)
Combining total air content measurements with ice and pore structure investigations on the micro-scale ,
EPICA Science Meeting, 2010, Rome, Italy. .
hdl:10013/epic.35189

Conference -Invited talk
Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440 (2009)
Direkte Beobachtungen und Modellierung des Lufteinschlusses im polaren Eis Neue Erkenntnisse für die Luftaltersbestimmung ,
Seminar der Abt. Klima- und Umweltphysik, Universität Bern. .
hdl:10013/epic.36395

Conference -Talk
Kipfstuhl, S. , Faria, S. H. , Azuma, N. , Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440 and Weikusat, I. ORCID: https://orcid.org/0000-0002-3023-6036 (2009)
Dynamic recrystallization in polar firn and ice ,
EGU .
hdl:10013/epic.34440

Conference -Poster
Kipfstuhl, S. , Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440, Horn, M. , Hörhold, M. and Faria, S. H. (2009)
Grain size in polar firn - what can we learn from high resolution images about grain growth in firn? ,
EGU .
hdl:10013/epic.34441

Conference -Poster
Drews, R. , Bohleber, P. , Eisen, O. ORCID: https://orcid.org/0000-0002-6380-962X, Steinhage, D. ORCID: https://orcid.org/0000-0003-4737-9751, Weikusat, I. ORCID: https://orcid.org/0000-0002-3023-6036, Wilhelms, F. ORCID: https://orcid.org/0000-0001-7688-3135 and Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440 (2009)
Imprints of air bubbles and crystal orientation fabric on RES signature ? ,
EGU 2009. .
hdl:10013/epic.33294
[thumbnail of Fulltext]
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Conference -Talk
Hörhold, M. , Kipfstuhl, S. , Wilhelms, F. ORCID: https://orcid.org/0000-0001-7688-3135 and Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440 (2009)
Is the densification of polar firn abnormal ? ,
European Geosciences Union General Assembly 2009 Vienna, Austria 24 April 2009.. .
hdl:10013/epic.32064

Conference -Conference paper
Faria, S. H. , Kipfstuhl, S. , Azuma, N. , Kuhs, W. F. , Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440, Weikusat, I. ORCID: https://orcid.org/0000-0002-3023-6036, Murshed, M. M. and Klein, H. (2009)
Multiscale Structures in the Antarctic Ice Sheet Part I: Inland Ice ,
Physics of ice core records II / ed. by Takeo Hondoh Sapporo : Hokkaido University Press. (Low Temperature Science, Supplement Issue ; 68) .
hdl:10013/epic.35759
[thumbnail of Fulltext]
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Conference -Poster
Hörhold, M. , Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440 and Kipfstuhl, S. (2009)
Polar Snow and Firn Properties - Examples from a Natural Long -Term-Experiment ,
International Snow Sciences Workshop (ISSW) 27.9. - 2.10. 2009, Davos, Switzerland,. .
hdl:10013/epic.34022

Conference -Poster
Hörhold, M. and Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440 (2008)
Why do we care about snow pore structure? ,
Knowledge Based Materials 4th Marie Curie Summer School, Porous and Aquerous Materials, 19. - 29.8.2008, Trest, Chech Republic. .
hdl:10013/epic.34029

Conference -Poster
Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440, Kipfstuhl, S. and Hörhold, M. (2008)
The layered structure of firn and its effect on air entrapment ,
EPICA Science conference, Venice 11.-13.11.2008. .
hdl:10013/epic.31596

Conference -Invited talk
Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440 (2008)
The layering of polar firn and its linkage to air trapping ,
Workshop on the mircostructure and properties of firn, 10-11.3.2008 Dartmouth College, Hanover, USA. .
hdl:10013/epic.31357

Conference -Poster
Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440, Kipfstuhl, S. and Faria, S. (2007)
3D-X-ray micro tomography and 2D-microstructure mapping of polar firn - a comprehensive picture by two complementary methods? ,
International symposium on snow science, IGS, MoscowSeptember 2007. .
hdl:10013/epic.27907

Conference -Poster
Lautensack, C. , Särkkä, A. , Schladitz, K. and Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440 (2007)
Anisotropy analysis of the system of air pores in polar ice ,
14th Workshop on Stochastic Geometry, Stereology and Image Analysis, 23-28. September 2007, Neudietendorf, Germany. .
hdl:10013/epic.27950

Conference -Poster
Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440, Kipfstuhl, S. and Lambrecht, A. (2007)
Direct observations and model calculations of air trapping in polar ice ,
EGU ViennaApril 2007. .
hdl:10013/epic.27905

Conference -Invited talk
Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440 (2007)
Eis und Kälte - Der Arbeitsalltag eines Polarforschers ,
Oberstufenzentrum KSA, Bremen, Beitrag zum Profilthema Polarforschung in Geographie, Deutsch und Darstellendem Spiel.2.2007. .
hdl:10013/epic.26401

Conference -Poster
Abegg, F. , Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440, Pape, T. , Bahr, A. , Klapp, S. and Bohrmann, G. (2007)
Fabric and depth distribution of gas hydrate in the shallow sub-seafloor of the Batumi Seep area offshore Georgia, Eastern Black Sea. ,
GV-Tagung: The Oceans in the Earth System, BremenOctober 2007. .
hdl:10013/epic.27892

Conference -Poster
Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440, Kipfstuhl, S. and Faria, S. (2007)
In Situ X-Ray-micro-tomography of snow at the EPICA-Drill Site Dronning Maud Land (DML) Antarctica ,
EGU ViennaApril 2007. .
hdl:10013/epic.27906

Conference -Invited talk
Hamann, I. ORCID: https://orcid.org/0000-0002-3023-6036, Kipfstuhl, S. , Faria, S. H. and Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440 (2007)
Microstructures in the EPICA DML ice core, Antarctica - sub-grain boundary statistics ,
The 2nd International Workshop on Physics of Ice Core Records (PICR-2), February 2 6, 2007, Institute of Low Temperature Science, Hokkaido University, Sapporo, Japan. .
hdl:10013/epic.26579

Conference -Poster
Birnbaum, G. ORCID: https://orcid.org/0000-0002-0252-6781, Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440, Brauner, R. , König-Langlo, G. and Tijm-Reijmer, C. (2007)
Starkwindereignisse und ihr Einfluss auf die Bildung von Schneedünen auf dem antarktischen Plateau von Dronning Maud Land ,
DACH Meteorologentagung, 10-14 Sept., Hamburg. .
hdl:10013/epic.27712

Conference -Talk
Birnbaum, G. ORCID: https://orcid.org/0000-0002-0252-6781, Brauner, R. , Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440, König-Langlo, G. and Tijm-Reijmer, C. (2007)
Strong Wind and Heavy Precipitation Events on the Antarctic plateau: Observations from Kohnen Station, Dronning Maud Land ,
2nd Antarctic Meteorological Observation, Modeling, and Forecasting Workshop, 26-28 June, Rome, Italy. .
hdl:10013/epic.26870

Conference -Invited talk
Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440 (2007)
Von Schnee zu Eis - Anwendungen der Röntgen Mikro-Computer-Tomographie in der Antarktis ,
Arbeitskreis "Bildanalyse und Mustererkennung Kaiserslautern" (BAMEK) IWTM-Fraunhofer-Institut.2.2007. .
hdl:10013/epic.26400

Conference -Invited talk
Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440 (2006)
Anwendung der Röntgen-Mikro-Computertomographie in der Antarktis - das polare Eisschild als poröses Medium ,
Sect. of Crystallography, GZG, University of Göttingen.11.2006. .
hdl:10013/epic.25931

Conference -Talk
Wilhelms, F. ORCID: https://orcid.org/0000-0001-7688-3135, Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440, Faria, S. H. , Oerter, H. , Miller, H. , Kipfstuhl, S. , Ruth, U. , Huybrechts, P. , Hamman, I. , Fritzsche, D. ORCID: https://orcid.org/0000-0002-0018-8993, Lawer, G. , Frenzel, A. , Dick, D. , Karlin, T. , Kaufmann, P. , Lambrecht, A. , Rybak, O. , Twarloh, B. and Valero-Delgado, F. (2006)
Both EPICA cores completed: Is the little sister the elder one? ,
European Geosciences Union General Assembly 2006 Vienna, Austria 07 April 2006. .
hdl:10013/epic.25469

Conference -Poster
Weiler, K. , Schwander, J. , Nyfeler, P. , Leuenberger, M. , Kaufmann, P. , Stoof, G. , Trimborn, K. , Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440 and Kipfstuhl, S. (2006)
Firnair sampling at Kohnen Station, Antarctica: estimation of the age difference between air and ice from CO2-data ,
EGU, Vienna 2006. .
hdl:10013/epic.25170

Conference -Poster
Hamann, I. ORCID: https://orcid.org/0000-0002-3023-6036, Faria, S. H. , Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440, Kipfstuhl, S. and Lambrecht, A. (2006)
Grain boundary hierarchy in the EPICA-DML deep ice core, Antarctica ,
11th International Conference on the Physics and Chemistry of Ice PCI 2006 Bremerhaven, Germany, July 23rd28th .
hdl:10013/epic.25642
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Conference -Poster
Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440, Kipfstuhl, S. and Faria, S. H. (2006)
The firnification of snow measured by X-Ray-micro-tomography at the EPICA-Drill site Dronning Maud Land (DML), Antarctica ,
11th International Conference on the Physics and Chemistry of Ice, PCI, Bremerhaven, Germany.7.-28.7.2006. .
hdl:10013/epic.25932

Conference -Poster
Kipfstuhl, S. , Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440, Hamann, I. ORCID: https://orcid.org/0000-0002-3023-6036, Lambrecht, A. and Ruth, U. (2005)
Cloudy bands and their microstructure in the EPICA-DML ice core ,
. .
hdl:10013/epic.23149

Conference -Poster
Ruth, U. , Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440, Kaufmann, P. , Kipfstuhl, S. , Raynaud, D. , Lipenkov, V. and Lemieux, B. (2005)
Continuous Measurements of Air Content: First Results from the EDML Ice Core, Antarctica and comparison to EDC ,
General Assembly of the European Geosciences Union, 24.-29.04.2005 Vienna, Austria. .
hdl:10013/epic.22584

Conference -Invited talk
Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440 (2005)
Der Übergang von offener zu geschlossener Porosität in Eisstrukturen, Analyse von Volumenbildern der Mikrostruktur von Werkstoffen, 17 Feb., Kaiserslautern, Deutschland ,
. .
hdl:10013/epic.22593

Conference -Poster
Ruth, U. , Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440, Kaufmann, P. , Kipfstuhl, S. and Raynaud, D. (2004)
Continuous measurements of air content: first results from the EDML ice core, Antarctica ,
AGU Fall Meeting 13-17 Dec. 2004 San Francisco USA. .
hdl:10013/epic.22143

Conference -Poster
Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440, Wilhelms, F. ORCID: https://orcid.org/0000-0001-7688-3135 and Kipfstuhl, S. (2004)
The influence of stratigraphic features on gas diffusion and pore close-off in dry polar firn ,
EGS-conference, 25-30 April, Nice, France. .
hdl:10013/epic.21564

Conference -Talk
Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440 (2003)
Gespür für Schnee Anwendungen der Röntgen-Computer-Tomographie in der Polarforschung ,
12th Workshop 'Quantitative Image Analysis', 16 May, Darmstadt, Germany. .
hdl:10013/epic.19254

Conference -Poster
Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440, Wilhelms, F. ORCID: https://orcid.org/0000-0001-7688-3135 and Kipfstuhl, S. (2003)
Particle size dependent densification rates lead to minimum in density fluctuations of polar firn ,
EGS-AGU-EUG, 7-11 April, Nice, France. .
hdl:10013/epic.19253

Conference -Poster
Eicken, H. , Pfirman, S. , Krouse, H. R. , Haas, C. ORCID: https://orcid.org/0000-0002-7674-3500, Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440 and Mackensen, A. ORCID: https://orcid.org/0000-0002-5024-4455 (1999)
Tracer studies of Arctic sea-ice growth and ablation ,
IUGG-Tagung, Birmingham, UK. .
hdl:10013/epic.20297

"Berichte zur Polar- und Meeresforschung"

"Berichte zur Polar- und Meeresforschung" PhD
Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440 (1999)
Untersuchungen zur Hydrologie des arktischen Meereises : Konsequenzen für den kleinskaligen Stofftransport = The hydraulic properties of Arctic sea-ice : implications for the small scale particle transport ,
Berichte zur Polarforschung (Reports on Polar Research), Bremerhaven, Alfred Wegener Institute for Polar and Marine Research, 325 , 150 p. .
doi:10.2312/BzP_0325_1999 , hdl:10013/epic.10328
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PANGAEA Documentation

PANGAEA Documentation
Sikorski, I. , Freitag, J. ORCID: https://orcid.org/0000-0003-2654-9440 and Mieding, B. (2002)
Stationen des Polarfront-Projektes ,
Alfred-Wegener-Institut für Polar- und Meeresforschung, Bremerhaven., Bremerhaven, PANGAEA .
hdl:10013/epic.28413
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