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Items where Author is "Friedrich, Jana"

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Number of items: 62.

Article
Friedrich, J. , Janssen, F. , Aleynik, D. , Bange, H. , Boltacheva, N. , Cagatay, M. N. , Dale, A. W. , Etiope, G. , Erdem, Z. , Geraga, M. , Gilli, A. , Gomoiu, M. T. , Hall, P. O. J. , Hanson, D. , He, Y. , Holtappels, M. , Kirf, M. K. , Kononets, M. , Konovalov, S. , Lichtschlag, A. , Livingstone, D. M. , Marinaro, G. , Mazlumyan, S. , Naeher, S. , North, . R. P. , Papatheodorou, G. , Pfannkuche, O. , Prien, R. D. , Rehder, G. , Schubert, C. J. , Soltwedel, T. , Sommer, S. , Stahl, H. , Stanev, E. V. , Teaca, A. , Tengberg, A. , Waldmann, C. , Wehrli, B. and Wenzhöfer, F. (2014)
Investigating hypoxia in aquatic environments: diverse approaches to addressing a complex phenomenon ,
Biogeosciences, 11 , pp. 1215-1259 .
doi:10.5194/bg-11-1215-2014 , hdl:10013/epic.43101

Article
Kusch, S. , Kashiyama, Y. , Ogawa, N. O. , Altabet, M. , Butzin, M. , Friedrich, J. , Ohkouchi, N. and Mollenhauer, G. (2010)
Implications for chloro- and pheopigment synthesis and preservation from combined compound-specific δ13C, δ15N, and Δ14C analysis ,
Biogeosciences Discuss., 7 , pp. 6265-6294 .
doi:10.5194/bgd-7-6265-2010 , hdl:10013/epic.35721

Article
Kusch, S. , Kashiyama, Y. , Ogawa, N. O. , Altabet, M. , Butzin, M. , Friedrich, J. , Ohkouchi, N. and Mollenhauer, G. (2010)
Implications for chloro- and pheopigment synthesis and preservation from combined compound-specific δ13C, δ15N, and Δ14C ,
Biogeosciences, 7 , pp. 4105-4118 .
doi:10.5194/bg-7-4105-2010 , hdl:10013/epic.36440

Conference -Talk
Kusch, S. , Kashiyama, Y. , Ogawa, N. O. , Altabet, M. , Friedrich, J. , Ohkouchi, N. and Mollenhauer, G. (2009)
Radiocarbon ages and stable C- and N-isotopic composition of chloro- and pheo-pigments from the Western Black Sea ,
International Meeting on Organic Geochemistry, 6-11 September, Bremen, Germany. .
hdl:10013/epic.33363

Article
Langmead, O. , McQuatters-Gollop, A. , Mee, L. D. , Friedrich, J. , Gilbert, A. J. , Gomoiu, M. T. , Jackson, E. L. , Knudsen, S. , Minicheva, G. and Todorova, V. (2009)
Recovery or decline of the Black Sea: A societal choice revealed by socio-ecological modeling. ,
Ecological Modelling., 220 (21), pp. 2927-2939 .
doi:10.1016/j.ecolmodel.2008.09.011 , hdl:10013/epic.39158

Conference -Invited talk
Kusch, S. , Kashiyama, Y. , Ogawa, N. O. , Friedrich, J. , Ohkouchi, N. and Mollenhauer, G. (2009)
Synthesis, degradation and depositional dynamics of chloro- and pheopigments from the Western Black Sea: insights from combined δ13C, δ15N and Δ14C analysis ,
ISOCOMPOUND '09 - Advances in analyses and applications of compound-specific stable isotopes in ecology, ecosystem- and earth sciences, 1-5 June 2009, Potsdam, Germany. .
hdl:10013/epic.32788

Article
Artioli, J. , Friedrich, J. , Gilbert, A. J. , MacQuatters-Gollop, A. , Mee, L. D. , Vermaat, J. E. , Wullf, F. , Humborg, C. , Palmeri, L. and Pollehne, F. (2008)
Nutrient budgets for European seas: a measure of the effectiveness of nutrient reduction policies ,
Marine Pollution Bulletin. 56(9), pp. 1609-1617 .
doi:10.1016/j.marpolbul.2008.05.027 , hdl:10013/epic.31575

Article
Friedrich, J. (2008)
Uranium contamination of the Aral Sea ,
Journal of Marine Systems. .
doi:10.1016/j.jmarsys.2008.03.020 , hdl:10013/epic.31571

Conference -Poster
Witt, M. , Friedrich, J. and Koch, B. (2007)
Characterization of fulvic and humic acids from different locations by ultrahigh resolution mass spectrometry ,
8th European FTMS conference. 28 Aug - 1 Sep 2007, Moscow, Russia. .
hdl:10013/epic.28806

Conference -Talk
Gilbert, A. , Artioli, Y. , Daunys, D. , Friedrich, J. , Humborg, C. , Lowe, C. , McQuatters-Gallop, A. , Mee, L. D. , Olenin, S. and Palmeri, L. (2007)
Estimation of future nutrient enrichment in Europes regional seas. ,
EGU2007-A-11085. .
hdl:10013/epic.27022

Conference -Invited talk
van Beusekom, J. , Friedrich, J. , Colijn, F. , Dolch, T. , Hass, C. , Löbl, M. , Martens, P. , Nehls, G. and Reise, K. (2007)
Long-Term Ecological Trends n the Wadden Sea ,
AGU Science meeting, Acapulco, Mexico, May 21-25 .
hdl:10013/epic.26850

Conference -Talk
Artioli, Y. , Friedrich, J. , Vermaat, J. , Wulff, F. , Gilbert, A. , Humborg, C. and Palmeri, L. (2007)
Nutrient budgets for European seas: a measure of the effectiveness of nutrient reduction policies ,
EGU2007-A-11079. .
hdl:10013/epic.26614

Conference -Poster
Koch, B. , Dittmar, T. , Witt, M. , Friedrich, J. and Kattner, G. (2007)
Resolving unresolved complex mixtures: Offline coupling of liquid chromatography and Fourier Transform Ion Cyclotron Resonance Mass Spectrometry ,
8th European FTMS conference. 28 Aug - 1 Sep 2007, Moscow, Russia. .
hdl:10013/epic.28805

Article
Teodoru, C. R. , Friedl, G. , Friedrich, J. , Roehl, U. , Sturm, M. and Wehrli, B. (2007)
Spatial distribution and recent changes in carbon, nitrogen and phosphorus accumulation in sediments of the Black Sea. ,
Marine Chemistry. .
doi:10.10.1016/j.marchem.2006.12.013 , hdl:10013/epic.26615

Conference -Talk
Friedrich, J. (2007)
Uranium contamination of the Aral Sea ,
EGU2007-A-01877. .
hdl:10013/epic.27021

Conference -Talk
Friedrich, J. , Delacruz, J. , Gilbert, A. and Mee, L. (2006)
Analyzing Ecosystem State Changes on the North-Western Black Sea Shelf with Conceptual Models. ,
EGU, Abstract EGU06-A-02670, 3-7 April, Vienna , Austria. .
hdl:10013/epic.25059

Article
Merz, B. , Friedrich, J. , Disse, M. , Schwarz, J. N. , Goldammer, J. G. and Wächter, J. (2006)
Possibilities and limitations of interdisciplinary, user-oriented research: Experiences from the German Research Network Natural Disasters ,
Natural hazards, 38, 1 , pp. 3-20 .
hdl:10013/epic.22341

Conference -Invited talk
Friedrich, J. (2005)
Nutrient budgets on the north-western Black Sea shelf. ,
invited lecture, EU-FRP 6 European Lifestyles and Marine Ecosystems, Meeting of WP 3 Eutrophication, 1/2005, Istanbul, Turkey. .
hdl:10013/epic.22355

Conference -Talk
Friedrich, J. and Oberhänsli, H. (2005)
Present geochemical state of the Aral Sea and consequences for the ecosystem. ,
EGU, 25-29 April, Vienna, Austria. .
hdl:10013/epic.25056

Conference -Talk
Friedrich, J. and Oberhänsli, H. (2005)
Present geochemical state of the Aral Sea and consequences for the ecosystem. ,
Physical and chemical fluxes in the dying Aral Sea. 3. Workshop under NATO Cooperative Linkage Project, EST.CLG 980445, 26-28 Oct., Moscow, Russia. .
hdl:10013/epic.25058

Article
Mee, L. D. , Friedrich, J. and Gomoiu, M. T. (2005)
Restoring the Black Sea in times of uncertainty. ,
Oceanography, Vol.18, No.2, pp. 32-43 .
hdl:10013/epic.22391
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Conference -Talk
Friedrich, J. , Gregoire, M. , Cociasu, A. and Gilbert, A. (2005)
Towards nutrient budget scenarios for the north-western Black Sea shelf. ,
LOICZ II Inaugural Open Science Meeting, 27-29 June, Egmond aan Zee, The Netherlands. .
hdl:10013/epic.25057

Conference -Poster
Hanfland, C. , Friedrich, J. , Geibert, W. and Rutgers v. d. Loeff, M. (2005)
Ziele und Vorbereitungen des deutschen Beitrags zum internationalen GEOTRACES Programm ,
22. Int. Polartagung, 18.-24.9.2005, Jena, Deutschland. .
hdl:10013/epic.22910

Conference -Talk
Friedrich, J. , Boroffka, N. and Oberhänsli, H. (2004)
The Aral Sea - Geochemical and Archeological Evidence for a Changing Ecosystem ,
Physical and chemical fluxes in the dying Aral Sea. Workshop under NATO Cooperative Linkage Project, EST.CLG 980445, 4/2004, Nukus/Uzbekhistan. .
hdl:10013/epic.22356

Conference -Poster
Friedrich, J. , Boroffka, N. and Oberhänsli, H. (2004)
The Aral Sea Geochemical Evidence for a Changing Ecosystem ,
Conference on "Climate change and aquatic systems. Past, present and future", 7/2004, Plymouth,UK. .
hdl:10013/epic.22358

Conference -Invited talk
Friedrich, J. , Mee, L. D. and Reynolds, P. (2004)
The Black Sea Ecosystem Recovery Project Eutrophication and adaptive management. Informal ,
invited lecture, conference on Methane seepage, mud volcanoes and gas hydrates in the Black Sea, 2/2004, Kiel, Germany,. .
hdl:10013/epic.22353

Conference -Poster
Hanfland, C. and Friedrich, J. (2004)
Determination of naturally occurring radionuclides in the Southern Ocean during GEOTRACES program ,
SCAR Open Science Conference, 26.-28.7.2004, Bremen, Germany. Terra Nostra Abstract Volume of XXVIII SCAR Meeting .
hdl:10013/epic.20534

Conference -Talk
Friedrich, J. (2004)
Geochemical results from the Aktumsyk field campaign in April 2004 ,
Physical and chemical fluxes in the dying Aral Sea. Workshop under NATO Cooperative Linkage Project, EST.CLG 980445, 11/2004, Potsdam, Germany. .
hdl:10013/epic.22357

Article
Friedrich, J. and Oberhänsli, H. (2004)
Hydrochemical properties of the Aral Sea water in summer 2002 ,
Journal of Marine Systems, 47 , pp. 77-88 .
hdl:10013/epic.19854
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Conference -Invited talk
Friedrich, J. , Gomoiu, M. T. , Besiktepe, S. and Mee, L. D. (2004)
Improve knowledge on the process of eutrophication in the Black Sea Report on the activities of the International Study Group in 2003-2004. ,
invited lectue, Inception meeting of Phase II of the Black Sea Ecosystem Recovery Project, 11/2004, Istanbul, Turkey. .
hdl:10013/epic.22354

Article
Gregoire, M. and Friedrich, J. (2004)
Nitrogen Budget of the north-western Black Sea shelf as inferred from modeling studies and in-situ benthic measurements. ,
Marine Ecology-Progress Series, 270 , pp. 15-39 .
hdl:10013/epic.19859
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Inbook
Rutgers v. d. Loeff, M. , Friedrich, J. , Geibert, W. , Hanfland, C. , Höltzen, H. , Vöge, I. and Walter, H. J. (2004)
Radionuclides as tracers for particle flux and transport of water masses in the Atlantic sector of the Southern Ocean ,
The South Atlantic in the Late Quaternary - Reconstruction of Material Budget and Current systems. Wefer, G., Ratmeyer, V. and Meinecke, G. (Eds.), Springer-Verlag : Berlin, Heidelberg, New York, Tokyo:, ISBN: 3-540-21028-8 .
hdl:10013/epic.15232

Conference -Talk
Friedrich, J. , Boroffka, N. and Oberhänsli, H. (2003)
The Aral Sea - New Data From a Changing Ecosystem - ,
35th International Liège Colloquium on Ocean Dynamics Dying and Dead Seas, 5/2003, Liege, Belgium. .
hdl:10013/epic.22359

Article
Friedrich, J. , Dinkel, C. , Grieder, E. , Radan, S. , Secrieru, D. , Steingruber, S. and Wehrli, B. (2003)
Nutrient uptake in Danube Delta Lakes. ,
Biogeochemistry, 64 , pp. 373-398 .
hdl:10013/epic.19855
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Conference -Talk
Friedrich, J. and Wehrli, B. (2003)
Reducing Nutrient Input Into the Black Sea - Learning From the Danube Delta - ,
International conference on Scientific and policy challenges towards an effective management of the marine environment Emphasis on the Black Sea and the Mediterranean regions, 10/2003, Varna, Bulgaria. .
hdl:10013/epic.22360

Article
Friedrich, J. , Dinkel, C. , Pimenov, N. , Wijsman, J. , Gomoiu, M. T. , Popa, L. , Cociasu, A. and Wehrli, B. (2002)
Benthic Nutrient Cycling and Diagenetic Pathways in the North Western Black Sea. ,
Estuarine coastal and shelf science, 54 , pp. 369-383 .
hdl:10013/epic.19856
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Conference -Invited talk
Friedrich, J. and Merz, B. (2002)
German Research Network Natural Disasters. ,
Invited lecture, 2nd IIASA-DPRI Meeting "Integrated disaster risk manegement: Megacity Vulnerability and Resilience", 7/2002, Laxenburg, Austria. .
hdl:10013/epic.22351

Conference -Invited talk
Friedrich, J. and Merz, B. (2002)
German Research Network Natural Disasters. ,
Seminar at SLF, 9/2002, Davos, Switzerland. .
hdl:10013/epic.22352

Conference -Invited talk
Friedrich, J. (2002)
Nutrient transformation in marine and freshwater ecosystems. ,
Seminar at Potsdam Institute for Climate Impact Research, 6/2002, Potsdam, Germany. .
hdl:10013/epic.22350

Conference -Talk
Friedrich, J. , Friedl, G. , Bondar, C. , Pimenov, N. , Wehrli, B. and Gregoire, M. (2002)
Spatial and Temporal Variability of Benthic Fluxes and Diagentic Pathways of Organic Matter in the North-Western Black Sea ,
Second International Conference on the Oceanography of the Eastern Mediterranean and Black Sea: Similarities and Differences of Two Interconnected Basins, 10/2002, Ankara, Turkey. .
hdl:10013/epic.22361

Conference -Talk
Friedrich, J. , Friedl, G. , Bondar, C. , Pimenov, N. , Wehrli, B. and Gregoire, M. (2002)
Spatial and Temporal Variability of Benthic Fluxes and Diagentic Pathways of Organic Matter in the North-Western Black Sea ,
AGU/ASLO Ocean Sciences Meeting, 2/2002, Honolulu, Hawaii-USA. .
hdl:10013/epic.22362

Conference -Invited talk
Friedrich, J. (2002)
Spatial and temporal variability of benthic fluxes and benthic mineralization pathways of organic matter in freshwater and marine ecosystems. ,
Seminar at INRS-ETE, 2/2002, Quebec, Canada. .
hdl:10013/epic.22349

Article
Friedrich, J. and Rutgers v. d. Loeff, M. (2002)
A two-tracer (210Po-234Th) approach to distinguish organic carbon and biogenic silica export flux in the Antarctic Circumpolar Current ,
DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS, 49 , pp. 101-120 .
hdl:10013/epic.16327
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Conference -Talk
Friedrich, J. and Merz, B. (2001)
Deutsches Forschungsnetz Naturkatastrophen ,
2th Panel on Natural Disaster Prevention of the German Committee of Disaster Prevention, 9/2001, Leipzig, Germany. .
hdl:10013/epic.22363

Article
Steingruber, S. M. , Friedrich, J. , Gächter, R. and Wehrli, B. (2001)
Measurement of denitrification in sediments with the 15N isotope pairing technique. ,
Applied and environmental microbiology, 67 , pp. 3771-3778 .
hdl:10013/epic.19857

Conference -Invited talk
Friedrich, J. and Merz, B. (2001)
Presentation of the German Research Network Natural Disasters. ,
Ernst Basler & Partner AG, 8/2001, Zollikon,Switzerland. .
hdl:10013/epic.22348

Conference -Poster
Friedrich, J. and Wehrli, B. (2000)
Delta Lakes as Nutrient Sinks Case Study Danube Delta ,
ASLO Aquatic Sciences Meeting Research across Boundaries 6/2000, Copenhagen, Denmark. .
hdl:10013/epic.22364

Conference -Invited talk
Friedrich, J. , Dinkel, C. and Wehrli, B. (2000)
Delta Lakes as nutrient sinks A process study in the Danube Delta. ,
Seminar at Institute F.A. Forel, 2/2000, Versoix/Switzerland. .
hdl:10013/epic.22347

Article
Pimenov, N. V. , Rusanov, I. I. , Yusupov, S. K. , Friedrich, J. , Lein, A. Y. , Wehrli, B. and Ivanov, M. V. (2000)
Microbial Processes at the Aerobic-Anaerobic Interface in the Deep-Water Zone of the Black Sea. ,
Microbiology, 69 , pp. 436-448 .
hdl:10013/epic.19858

Conference -Invited talk
Friedrich, J. (1999)
Benthic nutrient fluxes in marine and limnetic systems Black Sea and Danube Delta. ,
UFZ-Seminar, Umweltforschungszentrum, November 1999, Magdeburg/Germany. .
hdl:10013/epic.22346

Article
Friedrich, J. , Dinkel, C. , Grieder, E. , Steingruber, S. , Radan, S. and Wehrli, B. (1999)
Delta Lakes as nutrient sinks A process study in the Danube Delta. ,
GeoEcoMarina, 4 , pp. 5-17 .
hdl:10013/epic.21029

Conference -Poster
Wehrli, B. , Friedrich, J. and Dinkel, C. (1998)
Benthic fluxes of Nutrients and Redox-Sensitive Metals in the North Western Black Sea ,
"Ocean Sciences Meeting", AGU-ASLO, 1/1998, San Diego, USA. .
hdl:10013/epic.22365

Conference -Talk
Friedrich, J. , Dinkel, C. , Wehrli, B. , Friedl, G. , Pimenov, N. , Wijsman, J. and Gomoiu, M. T. (1998)
Benthic nutreint cycling and diagenetic pathways in the north-western Black Sea. ,
EU-EROS 21 "The interactions betwen the Danube, Dniestr and Dniepr Rivers and the north-western Black Sea. final meeting on the North-Western Black Sea,6/1998, Ispra, Italy. .
hdl:10013/epic.22368

Conference -Poster
Friedrich, J. and Rutgers v. d. Loeff, M. (1998)
Lead-210 and Polonium-210 in the Southern Polar Ocean - Tracer for Particle Export? ,
"Ocean Sciences Meeting", AGU-ASLO, 1/1998, San Diego, USA. .
hdl:10013/epic.22366

Conference -Poster
Friedrich, J. , Dinkel, C. and Wehrli, B. (1997)
Benthic fluxes of nutrients and redox sensitive metals in the north-western Black Sea. ,
LOICZ conference Global change science in the coastal zone 10/1997, Noordwijkerhout, Netherlands. .
hdl:10013/epic.22369

Article
Rutgers v. d. Loeff, M. , Friedrich, J. and Bathmann, U. (1997)
Carbon export during the spring bloom at the Antarctic Polar Front, determined with the natural tracer 234Th ,
Deep-Sea Research II, 44 , pp. 457-478 .
hdl:10013/epic.13280

PANGAEA Documentation
Rutgers v. d. Loeff, M. , Höltzen, H. and Friedrich, J. (1997)
Documentation of file RADIOISO.XLS ,
Smetacek, Victor; de Baar, Hein JW; Bathmann, Ulrich; Lochte, Karin; Rutgers van der Loeff, Michiel M (1997): Ecology and biogeochemistry of the Antarctic circumpolar current during austral spring: Southern Ocean JGOFS Cruise ANT X/6 of R.V. Polarstern. D, Bremerhaven, PANGAEA, 00100-2 .
hdl:10013/epic.37541
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"Berichte zur Polar- und Meeresforschung" PhD
Friedrich, J. (1997)
Polonium-210 und Blei-210 im Südpolarmeer : natürliche Tracer für biologische und hydrographische Prozesse im Oberflächenwasser des Antarktischen Zirkumpolarstroms und des Weddellmeeres = Polonium-210 and Lead-210 in the southern Polar Ocean : naturally occurring tracers of biological and hydrographical processes in the surface waters of the Antarctic circumpolar current and the Weddell Sea ,
Berichte zur Polarforschung (Reports on Polar Research), Bremerhaven, Alfred Wegener Institute for Polar and Marine Research, 235 , 155 p. .
hdl:10013/epic.10236
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Thesis -PhD
Friedrich, J. (1997)
Polonium-210 und Blei-210 im Südpolarmeer: Natürliche Tracer für biologische und hydrographische Prozesse im Oberflächenwasser des Antarktischen Zirkumpolarstroms und des Weddellmeeres ,
PhD thesis,
hdl:10013/epic.11440

Conference -Invited talk
Friedrich, J. (1996)
Polonium-210 and Lead-210 in the Southern Polar Ocean Tracer for particle export? ,
EAWAG Seminar, EAWAG, Dezember 1996, Kastanienbaum, Schweiz. .
hdl:10013/epic.22345

Conference -Talk
Van der Loeff, M. M. R. , Friedrich, J. , Bathmann, U. , Dubischar, C. , Stoll, M. H. C. and de Baar, H. J. W. (1994)
Carbon Export During the Spring Bloom at the Southern Polar Front, Quantified with the Natural Tracer 234Th. ,
1994 Ocean Sciences Meeting, ASLO, 21-25 Feb, San Diego, California, USA. .
hdl:10013/epic.22262

Conference -Poster
Friedrich, J. and Rutgers v. d. Loeff, M. (1994)
Polonium-210 and Lead-210 in Surface Waters of the Antarctic Circumpolar Current During the Development of a Plankton Bloom. ,
"Ocean Sciences Meeting", AGU-ASLO, 2/1994, San Diego, USA. .
hdl:10013/epic.22367

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