Surface water changes during transit from North Pole to Fram Strait
Rutgers van der Loeff, Michiel ORCID: https://orcid.org/0000-0003-1393-3742,
Casacuberta, Núria,
Wefing, Anne-Marie,
Laukert, Georgi,
Bauch, D.,
Paffrath, Ronja,
Provost, Christine,
Karcher, Michael ORCID: https://orcid.org/0000-0002-9587-811X,
Meyer, Hanno ORCID: https://orcid.org/0000-0003-4129-4706,
Schaffer, Janin ORCID: https://orcid.org/0000-0002-1395-7851 and
Rabe, Benjamin ORCID: https://orcid.org/0000-0001-5794-9856
;
Contact
Michiel.Rutgers.v.d.Loeff [ at ] awi.de
Abstract
Ice drift recorded by ice buoys show a relatively direct pathway of ice from the North Pole to Fram Strait. An ice tethered buoy deployed in 2015 during GEOTRACES section GN04 at 89°N was recovered in August 2016 at 76°43N in Fram Strait during GEOTRACES section GN05.
Does the surface water follow a similar pathway? Tracer data collected during these two expeditions are used to investigate to what extent the water in the East Greenland Current (EGC) can be considered a downstream extension of the Transpolar Drift (TPD) at the North Pole.
The reduction of 228Ra activities and 129I/236U ratios in the EGC compared to the TPD can be explained either by a much longer (order 3-4 years) travel time than suggested by the ice drift, or by admixture of surface waters from other, presumably Pacific sources.
The pathways followed by surface water in a coupled sea-ice-ocean model suggest that the transit of surface water is indeed much more erratic and time consuming than the transit of ice. We will discuss whether N/P ratios or Nd isotopes give evidence for a change in the contribution of Pacific waters.
Item Type
Conference
(Invited talk)
Authors
Rutgers van der Loeff, Michiel ORCID: https://orcid.org/0000-0003-1393-3742,
Casacuberta, Núria,
Wefing, Anne-Marie,
Laukert, Georgi,
Bauch, D.,
Paffrath, Ronja,
Provost, Christine,
Karcher, Michael ORCID: https://orcid.org/0000-0002-9587-811X,
Meyer, Hanno ORCID: https://orcid.org/0000-0003-4129-4706,
Schaffer, Janin ORCID: https://orcid.org/0000-0002-1395-7851 and
Rabe, Benjamin ORCID: https://orcid.org/0000-0001-5794-9856
;
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Primary Division
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Published
Event Details
Goldschmidt Conference, 18 Aug 2019 - 23 Aug 2019, Barcelona.
Eprint ID
50416
Cite as
Rutgers van der Loeff, M.
,
Casacuberta, N.
,
Wefing, A. M.
,
Laukert, G.
,
Bauch, D.
,
Paffrath, R.
,
Provost, C.
,
Karcher, M.
,
Meyer, H.
,
Schaffer, J.
and
Rabe, B.
(2019):
Surface water changes during transit from North Pole to Fram Strait
,
Goldschmidt Conference,
Barcelona,
18 August 2019 - 23 August 2019
.
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ARK > XXIX > 3
PS > 100
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