Radionuclides measured on 37 water bottle profiles during POLARSTERN cruise ARK-XXII/2 ...

The loss of Arctic sea ice has accelerated in recent years. With the decline in sea ice cover, the Arctic Ocean biogeochemistry is undergoing unprecedented change. A key question about the changing Arctic Ocean biogeochemistry is concerning the impact of the shrinking sea ice cover on the particulat...

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Bibliographic Details
Main Authors: Cai, Pinghe, Rutgers van der Loeff, Michiel M, Stimac, Ingrid, Nöthig, Eva-Maria, Lepore, Kate, Moran, S Bradley
Format: Dataset
Language:English
Published: PANGAEA 2010
Subjects:
Event label
Date/Time of event
Latitude of event
Longitude of event
Elevation of event
DEPTH, water
Salinity
Uranium-238
Uranium-238, standard deviation
Thorium-234, total
Thorium-234, total, standard deviation
Thorium-234/Uranium-238 activity ratio
Thorium-234/Uranium-238 activity ratio, standard deviation
CTD/Rosette, ultra clean
CTD/Rosette
CTD
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ARK-XXII/2
Polarstern
Global marine biogeochemical cycles of trace elements and their isotopes GEOTRACES
Marine Geochemistry @ AWI AWI_MarGeoChem
Arctic
Arctic Ocean
Barents Sea
Kara Sea
Laptev Sea
The Ark
laptev
Sea ice
Online Access:https://dx.doi.org/10.1594/pangaea.708354
https://doi.pangaea.de/10.1594/PANGAEA.708354
Description
Summary:The loss of Arctic sea ice has accelerated in recent years. With the decline in sea ice cover, the Arctic Ocean biogeochemistry is undergoing unprecedented change. A key question about the changing Arctic Ocean biogeochemistry is concerning the impact of the shrinking sea ice cover on the particulate organic carbon (POC) export from the upper Arctic Ocean. Thus far, there are still very few direct measurements of POC export in the permanently ice-covered central Arctic Ocean. A further issue is that the magnitude of the POC export so far documented in this region remains controversial. During the ARK-XXII/2 expedition to the Arctic Ocean from 28 July to 7 October in 2007, we conducted a high-resolution study of POC export using 234Th/238U disequilibrium. Depth profiles of total 234Th in the upper 200 m were collected at 36 stations in the central Arctic Ocean and its adjacent seas, i.e., the Barents Sea, the Kara Sea and the Laptev Sea. Samples were processed using a small-volume MnO2 coprecipitation method ... : Volume sampled: 4 L of seawater ...

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