Radium 228 and Radium 226 in surface water of the Kara Sea and Laptev Sea
The surface water in the Transpolar Drift in the Arctic Ocean has a strong signature of 228Ra. In an earlier study of 228Ra in the open Arctic we showed that the major 228Ra source had to be in the Siberian shelf seas, but only a single shelf station was published so far. Here we investigate the sou...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.60021 2023-05-15T15:01:01+02:00 Radium 228 and Radium 226 in surface water of the Kara Sea and Laptev Sea Rutgers van der Loeff, Michiel M Kühne, Stephan Wahsner, Monika Höltzen, Heike Frank, Markus Ekwurzel, Brenda Mensch, Manfred Rachold, Volker MEDIAN LATITUDE: 76.795496 * MEDIAN LONGITUDE: 92.899991 * SOUTH-BOUND LATITUDE: 68.823833 * WEST-BOUND LONGITUDE: 30.253333 * NORTH-BOUND LATITUDE: 82.771667 * EAST-BOUND LONGITUDE: 133.548333 * DATE/TIME START: 1993-08-12T10:00:00 * DATE/TIME END: 1999-09-04T00:00:00 * MINIMUM DEPTH, water: 1.00 m * MAXIMUM DEPTH, water: 1.00 m 2003-03-24 text/tab-separated-values, 369 data points https://doi.pangaea.de/10.1594/PANGAEA.60021 https://doi.org/10.1594/PANGAEA.60021 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.60021 https://doi.org/10.1594/PANGAEA.60021 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Rutgers van der Loeff, Michiel M; Kühne, Stephan; Wahsner, Monika; Höltzen, Heike; Frank, Markus; Ekwurzel, Brenda; Mensch, Manfred; Rachold, Volker (2003): 228Ra and 226Ra in the Kara and Laptev seas. Continental Shelf Research, 23(1), 113-124, https://doi.org/10.1016/S0278-4343(02)00169-3 4387-1 4397-1 4405-1 4414-1 4416-1 4418-1 ARK-IX/4 AWI_MarGeoChem AWI_Paleo AWI_PerDyn AWI Arctic Land Expedition BC Box corer Calculated DEPTH water DM49 Dmitry Mendeleev Elevation of event Event label Gamma-ray spectrometry HAND Isotope ratio mass spectrometry Jenissei KAL_R Kasten corer RUS L1 L2 L3 Laptev Sea System Latitude of event Lena99_1 Lena99_2 Lena99_3 Lena-Delta1999 Longitude of event LSS M15 M92 Marine Geochemistry @ AWI Men4377-1 Men4380-1 Men4384-1 Men4387-1 Men4392-1 Men4395-1 Men4397-1 Men4398-1 Men4400-1 Men4402-1 Dataset 2003 ftpangaea https://doi.org/10.1594/PANGAEA.60021 https://doi.org/10.1016/S0278-4343(02)00169-3 2023-01-20T07:36:34Z The surface water in the Transpolar Drift in the Arctic Ocean has a strong signature of 228Ra. In an earlier study of 228Ra in the open Arctic we showed that the major 228Ra source had to be in the Siberian shelf seas, but only a single shelf station was published so far. Here we investigate the sources of this signal on the Siberian shelves by measurements of 228Ra and 226Ra in surface waters of the Kara and Laptev Sea, including the Ob, Yenisey and Lena estuaries. In the Ob and Lena rivers we found an indication for a very strong and unexpected removal of both isotopes in the early stage of estuarine mixing, presumably related to flocculation of organic-rich material. Whereas 226Ra behaves conservatively on the shelf, the distribution of 228Ra is governed by large inputs on the shelves, although sources are highly variable. In the Kara Sea the maximum activity was found in the Baydaratskaya Bay, where tidal resonance and low freshwater supply favour 228Ra accumulation. The Laptev Sea is a stronger source for 228Ra than the Kara Sea. Since a large part of Kara Sea water flows through the Laptev Sea, the 228Ra signal in the Transpolar Drift can be described as originating on the Laptev shelf. The combined freshwater inputs from the Eurasian shelves thus produce a common radium signature with a 228Ra/226Ra activity ratio of 4.0 at 20% river water. The radium signals of the individual Siberian rivers and shelves cannot be separated, but their signal is significantly different from the signal produced on the Canadian shelf (Smith et al., in press). In this respect, the radium tracers add to the information given by Barium. Moreover, with the 5.8 year half-life of 228Ra, they have the potential to serve as a tracer for the age of a water mass since its contact with the shelves. Dataset Arctic Arctic Ocean Baydaratskaya bay Kara Sea laptev Laptev Sea PANGAEA - Data Publisher for Earth & Environmental Science Arctic Arctic Ocean Laptev Sea Kara Sea Rus’ ENVELOPE(155.950,155.950,54.200,54.200) Yenisey ENVELOPE(82.680,82.680,71.828,71.828) ENVELOPE(30.253333,133.548333,82.771667,68.823833) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
4387-1 4397-1 4405-1 4414-1 4416-1 4418-1 ARK-IX/4 AWI_MarGeoChem AWI_Paleo AWI_PerDyn AWI Arctic Land Expedition BC Box corer Calculated DEPTH water DM49 Dmitry Mendeleev Elevation of event Event label Gamma-ray spectrometry HAND Isotope ratio mass spectrometry Jenissei KAL_R Kasten corer RUS L1 L2 L3 Laptev Sea System Latitude of event Lena99_1 Lena99_2 Lena99_3 Lena-Delta1999 Longitude of event LSS M15 M92 Marine Geochemistry @ AWI Men4377-1 Men4380-1 Men4384-1 Men4387-1 Men4392-1 Men4395-1 Men4397-1 Men4398-1 Men4400-1 Men4402-1 |
spellingShingle |
4387-1 4397-1 4405-1 4414-1 4416-1 4418-1 ARK-IX/4 AWI_MarGeoChem AWI_Paleo AWI_PerDyn AWI Arctic Land Expedition BC Box corer Calculated DEPTH water DM49 Dmitry Mendeleev Elevation of event Event label Gamma-ray spectrometry HAND Isotope ratio mass spectrometry Jenissei KAL_R Kasten corer RUS L1 L2 L3 Laptev Sea System Latitude of event Lena99_1 Lena99_2 Lena99_3 Lena-Delta1999 Longitude of event LSS M15 M92 Marine Geochemistry @ AWI Men4377-1 Men4380-1 Men4384-1 Men4387-1 Men4392-1 Men4395-1 Men4397-1 Men4398-1 Men4400-1 Men4402-1 Rutgers van der Loeff, Michiel M Kühne, Stephan Wahsner, Monika Höltzen, Heike Frank, Markus Ekwurzel, Brenda Mensch, Manfred Rachold, Volker Radium 228 and Radium 226 in surface water of the Kara Sea and Laptev Sea |
topic_facet |
4387-1 4397-1 4405-1 4414-1 4416-1 4418-1 ARK-IX/4 AWI_MarGeoChem AWI_Paleo AWI_PerDyn AWI Arctic Land Expedition BC Box corer Calculated DEPTH water DM49 Dmitry Mendeleev Elevation of event Event label Gamma-ray spectrometry HAND Isotope ratio mass spectrometry Jenissei KAL_R Kasten corer RUS L1 L2 L3 Laptev Sea System Latitude of event Lena99_1 Lena99_2 Lena99_3 Lena-Delta1999 Longitude of event LSS M15 M92 Marine Geochemistry @ AWI Men4377-1 Men4380-1 Men4384-1 Men4387-1 Men4392-1 Men4395-1 Men4397-1 Men4398-1 Men4400-1 Men4402-1 |
description |
The surface water in the Transpolar Drift in the Arctic Ocean has a strong signature of 228Ra. In an earlier study of 228Ra in the open Arctic we showed that the major 228Ra source had to be in the Siberian shelf seas, but only a single shelf station was published so far. Here we investigate the sources of this signal on the Siberian shelves by measurements of 228Ra and 226Ra in surface waters of the Kara and Laptev Sea, including the Ob, Yenisey and Lena estuaries. In the Ob and Lena rivers we found an indication for a very strong and unexpected removal of both isotopes in the early stage of estuarine mixing, presumably related to flocculation of organic-rich material. Whereas 226Ra behaves conservatively on the shelf, the distribution of 228Ra is governed by large inputs on the shelves, although sources are highly variable. In the Kara Sea the maximum activity was found in the Baydaratskaya Bay, where tidal resonance and low freshwater supply favour 228Ra accumulation. The Laptev Sea is a stronger source for 228Ra than the Kara Sea. Since a large part of Kara Sea water flows through the Laptev Sea, the 228Ra signal in the Transpolar Drift can be described as originating on the Laptev shelf. The combined freshwater inputs from the Eurasian shelves thus produce a common radium signature with a 228Ra/226Ra activity ratio of 4.0 at 20% river water. The radium signals of the individual Siberian rivers and shelves cannot be separated, but their signal is significantly different from the signal produced on the Canadian shelf (Smith et al., in press). In this respect, the radium tracers add to the information given by Barium. Moreover, with the 5.8 year half-life of 228Ra, they have the potential to serve as a tracer for the age of a water mass since its contact with the shelves. |
format |
Dataset |
author |
Rutgers van der Loeff, Michiel M Kühne, Stephan Wahsner, Monika Höltzen, Heike Frank, Markus Ekwurzel, Brenda Mensch, Manfred Rachold, Volker |
author_facet |
Rutgers van der Loeff, Michiel M Kühne, Stephan Wahsner, Monika Höltzen, Heike Frank, Markus Ekwurzel, Brenda Mensch, Manfred Rachold, Volker |
author_sort |
Rutgers van der Loeff, Michiel M |
title |
Radium 228 and Radium 226 in surface water of the Kara Sea and Laptev Sea |
title_short |
Radium 228 and Radium 226 in surface water of the Kara Sea and Laptev Sea |
title_full |
Radium 228 and Radium 226 in surface water of the Kara Sea and Laptev Sea |
title_fullStr |
Radium 228 and Radium 226 in surface water of the Kara Sea and Laptev Sea |
title_full_unstemmed |
Radium 228 and Radium 226 in surface water of the Kara Sea and Laptev Sea |
title_sort |
radium 228 and radium 226 in surface water of the kara sea and laptev sea |
publisher |
PANGAEA |
publishDate |
2003 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.60021 https://doi.org/10.1594/PANGAEA.60021 |
op_coverage |
MEDIAN LATITUDE: 76.795496 * MEDIAN LONGITUDE: 92.899991 * SOUTH-BOUND LATITUDE: 68.823833 * WEST-BOUND LONGITUDE: 30.253333 * NORTH-BOUND LATITUDE: 82.771667 * EAST-BOUND LONGITUDE: 133.548333 * DATE/TIME START: 1993-08-12T10:00:00 * DATE/TIME END: 1999-09-04T00:00:00 * MINIMUM DEPTH, water: 1.00 m * MAXIMUM DEPTH, water: 1.00 m |
long_lat |
ENVELOPE(155.950,155.950,54.200,54.200) ENVELOPE(82.680,82.680,71.828,71.828) ENVELOPE(30.253333,133.548333,82.771667,68.823833) |
geographic |
Arctic Arctic Ocean Laptev Sea Kara Sea Rus’ Yenisey |
geographic_facet |
Arctic Arctic Ocean Laptev Sea Kara Sea Rus’ Yenisey |
genre |
Arctic Arctic Ocean Baydaratskaya bay Kara Sea laptev Laptev Sea |
genre_facet |
Arctic Arctic Ocean Baydaratskaya bay Kara Sea laptev Laptev Sea |
op_source |
Supplement to: Rutgers van der Loeff, Michiel M; Kühne, Stephan; Wahsner, Monika; Höltzen, Heike; Frank, Markus; Ekwurzel, Brenda; Mensch, Manfred; Rachold, Volker (2003): 228Ra and 226Ra in the Kara and Laptev seas. Continental Shelf Research, 23(1), 113-124, https://doi.org/10.1016/S0278-4343(02)00169-3 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.60021 https://doi.org/10.1594/PANGAEA.60021 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.60021 https://doi.org/10.1016/S0278-4343(02)00169-3 |
_version_ |
1766333081379143680 |