Radium in Arctic surface water ...
The transpolar drift is strongly enriched in 228Ra accumulated on the wide Arctic shelves with subsequent rapid offshore transport. We present new data of Polarstern expeditions to the central Arctic and to the Kara and Laptev seas. Because 226Ra activities in Pacific waters are 30% higher than in A...
Main Authors: | , , , , , , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
PANGAEA
2012
|
Subjects: | |
Online Access: | https://dx.doi.org/10.1594/pangaea.772682 https://doi.pangaea.de/10.1594/PANGAEA.772682 |
id |
ftdatacite:10.1594/pangaea.772682 |
---|---|
record_format |
openpolar |
spelling |
ftdatacite:10.1594/pangaea.772682 2024-09-09T19:20:42+00:00 Radium in Arctic surface water ... Rutgers van der Loeff, Michiel M Cai, Pinghe Stimac, Ingrid Bauch, Dorothea Hanfland, Claudia Roeske, Tobias Moran, S Bradley 2012 application/zip https://dx.doi.org/10.1594/pangaea.772682 https://doi.pangaea.de/10.1594/PANGAEA.772682 en eng PANGAEA https://dx.doi.org/10.1029/2011jc007478 Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 CTD/Rosette In situ pump Expendable CTD ARK-XI/1 ARK-XXII/2 Polarstern Marine Geochemistry @ AWI AWI_MarGeoChem article Collection Supplementary Publication Series of Datasets 2012 ftdatacite https://doi.org/10.1594/pangaea.77268210.1029/2011jc007478 2024-07-03T13:10:33Z The transpolar drift is strongly enriched in 228Ra accumulated on the wide Arctic shelves with subsequent rapid offshore transport. We present new data of Polarstern expeditions to the central Arctic and to the Kara and Laptev seas. Because 226Ra activities in Pacific waters are 30% higher than in Atlantic waters, we correct 226Ra for the Pacific admixture when normalizing 228Ra with 226Ra. The use of 228Ra decay as age marker critically depends on the constancy in space and time of the source activity, a condition that has not yet adequately been tested. While 228Ra decays during transit over the central basin, ingrowth of 228Th could provide an alternative age marker. The high 228Th/228Ra activity ratio (AR = 0.8-1.0) in the central basins is incompatible with a mixing model based on horizontal eddy diffusion. An advective model predicts that 228Th grows to an equilibrium AR, the value of which depends on the scavenging regime. The low AR over the Lomonosov Ridge (AR = 0.5) can be due to either rapid ... : Supplement to: Rutgers van der Loeff, Michiel M; Cai, Pinghe; Stimac, Ingrid; Bauch, Dorothea; Hanfland, Claudia; Roeske, Tobias; Moran, S Bradley (2012): Shelf-basin exchange times of Arctic surface waters estimated from 228Th/228Ra disequilibrium. Journal of Geophysical Research: Oceans, 177, C03024 ... Article in Journal/Newspaper Arctic laptev Lomonosov Ridge DataCite Arctic Central Basin ENVELOPE(43.000,43.000,73.500,73.500) Pacific |
institution |
Open Polar |
collection |
DataCite |
op_collection_id |
ftdatacite |
language |
English |
topic |
CTD/Rosette In situ pump Expendable CTD ARK-XI/1 ARK-XXII/2 Polarstern Marine Geochemistry @ AWI AWI_MarGeoChem |
spellingShingle |
CTD/Rosette In situ pump Expendable CTD ARK-XI/1 ARK-XXII/2 Polarstern Marine Geochemistry @ AWI AWI_MarGeoChem Rutgers van der Loeff, Michiel M Cai, Pinghe Stimac, Ingrid Bauch, Dorothea Hanfland, Claudia Roeske, Tobias Moran, S Bradley Radium in Arctic surface water ... |
topic_facet |
CTD/Rosette In situ pump Expendable CTD ARK-XI/1 ARK-XXII/2 Polarstern Marine Geochemistry @ AWI AWI_MarGeoChem |
description |
The transpolar drift is strongly enriched in 228Ra accumulated on the wide Arctic shelves with subsequent rapid offshore transport. We present new data of Polarstern expeditions to the central Arctic and to the Kara and Laptev seas. Because 226Ra activities in Pacific waters are 30% higher than in Atlantic waters, we correct 226Ra for the Pacific admixture when normalizing 228Ra with 226Ra. The use of 228Ra decay as age marker critically depends on the constancy in space and time of the source activity, a condition that has not yet adequately been tested. While 228Ra decays during transit over the central basin, ingrowth of 228Th could provide an alternative age marker. The high 228Th/228Ra activity ratio (AR = 0.8-1.0) in the central basins is incompatible with a mixing model based on horizontal eddy diffusion. An advective model predicts that 228Th grows to an equilibrium AR, the value of which depends on the scavenging regime. The low AR over the Lomonosov Ridge (AR = 0.5) can be due to either rapid ... : Supplement to: Rutgers van der Loeff, Michiel M; Cai, Pinghe; Stimac, Ingrid; Bauch, Dorothea; Hanfland, Claudia; Roeske, Tobias; Moran, S Bradley (2012): Shelf-basin exchange times of Arctic surface waters estimated from 228Th/228Ra disequilibrium. Journal of Geophysical Research: Oceans, 177, C03024 ... |
format |
Article in Journal/Newspaper |
author |
Rutgers van der Loeff, Michiel M Cai, Pinghe Stimac, Ingrid Bauch, Dorothea Hanfland, Claudia Roeske, Tobias Moran, S Bradley |
author_facet |
Rutgers van der Loeff, Michiel M Cai, Pinghe Stimac, Ingrid Bauch, Dorothea Hanfland, Claudia Roeske, Tobias Moran, S Bradley |
author_sort |
Rutgers van der Loeff, Michiel M |
title |
Radium in Arctic surface water ... |
title_short |
Radium in Arctic surface water ... |
title_full |
Radium in Arctic surface water ... |
title_fullStr |
Radium in Arctic surface water ... |
title_full_unstemmed |
Radium in Arctic surface water ... |
title_sort |
radium in arctic surface water ... |
publisher |
PANGAEA |
publishDate |
2012 |
url |
https://dx.doi.org/10.1594/pangaea.772682 https://doi.pangaea.de/10.1594/PANGAEA.772682 |
long_lat |
ENVELOPE(43.000,43.000,73.500,73.500) |
geographic |
Arctic Central Basin Pacific |
geographic_facet |
Arctic Central Basin Pacific |
genre |
Arctic laptev Lomonosov Ridge |
genre_facet |
Arctic laptev Lomonosov Ridge |
op_relation |
https://dx.doi.org/10.1029/2011jc007478 |
op_rights |
Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 |
op_doi |
https://doi.org/10.1594/pangaea.77268210.1029/2011jc007478 |
_version_ |
1809760863177932800 |