Radionuclides measured on 21 water bottle profiles during POLARSTERN cruise ANT-XXIV/3
Drake Passage is a major route for many water masses from the strong Antarctic Circumpolar Current. During the ANTXXIV-3 expedition (in 2008) the vertical distributions of dissolved and size-fractionated particulate 231Pa and thorium isotopes (230Th, 232Th and 234Th) were investigated in order to be...
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Format: | Other/Unknown Material |
Language: | English |
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PANGAEA
2010
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Online Access: | https://doi.pangaea.de/10.1594/PANGAEA.746773 https://doi.org/10.1594/PANGAEA.746773 |
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.746773 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
ANT-XXIV/3 AWI_MarGeoChem CTD/Rosette ultra clean CTD-RO CTD-UC Drake Passage GEOTRACES Global marine biogeochemical cycles of trace elements and their isotopes Marine Geochemistry @ AWI MULT Multiple investigations Polarstern Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas PS71 PS71/097-2 PS71/099-2 PS71/101-3 PS71/104-6 PS71/104-8 PS71/113-4 PS71/131-6 PS71/154-1 PS71/161-4 PS71/161-6 PS71/178-3 PS71/193-6 PS71/193-7 PS71/222-2 PS71/230-4 PS71/230-6 PS71/236-6 PS71/241-7 PS71/244-10 PS71/244-8 PS71/250-1 Scotia Sea southwest Atlantic South Atlantic Ocean SPP1158 Weddell Sea |
spellingShingle |
ANT-XXIV/3 AWI_MarGeoChem CTD/Rosette ultra clean CTD-RO CTD-UC Drake Passage GEOTRACES Global marine biogeochemical cycles of trace elements and their isotopes Marine Geochemistry @ AWI MULT Multiple investigations Polarstern Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas PS71 PS71/097-2 PS71/099-2 PS71/101-3 PS71/104-6 PS71/104-8 PS71/113-4 PS71/131-6 PS71/154-1 PS71/161-4 PS71/161-6 PS71/178-3 PS71/193-6 PS71/193-7 PS71/222-2 PS71/230-4 PS71/230-6 PS71/236-6 PS71/241-7 PS71/244-10 PS71/244-8 PS71/250-1 Scotia Sea southwest Atlantic South Atlantic Ocean SPP1158 Weddell Sea Venchiarutti, Célia Rutgers van der Loeff, Michiel M Stimac, Ingrid Radionuclides measured on 21 water bottle profiles during POLARSTERN cruise ANT-XXIV/3 |
topic_facet |
ANT-XXIV/3 AWI_MarGeoChem CTD/Rosette ultra clean CTD-RO CTD-UC Drake Passage GEOTRACES Global marine biogeochemical cycles of trace elements and their isotopes Marine Geochemistry @ AWI MULT Multiple investigations Polarstern Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas PS71 PS71/097-2 PS71/099-2 PS71/101-3 PS71/104-6 PS71/104-8 PS71/113-4 PS71/131-6 PS71/154-1 PS71/161-4 PS71/161-6 PS71/178-3 PS71/193-6 PS71/193-7 PS71/222-2 PS71/230-4 PS71/230-6 PS71/236-6 PS71/241-7 PS71/244-10 PS71/244-8 PS71/250-1 Scotia Sea southwest Atlantic South Atlantic Ocean SPP1158 Weddell Sea |
description |
Drake Passage is a major route for many water masses from the strong Antarctic Circumpolar Current. During the ANTXXIV-3 expedition (in 2008) the vertical distributions of dissolved and size-fractionated particulate 231Pa and thorium isotopes (230Th, 232Th and 234Th) were investigated in order to better define the scavenging regimes and the effects of the oceanic circulation on the fate of particulate material and on the Pa-Th distributions in the water column. The reversible scavenging-model applied to both 230Th and 234Th, in the upper 1500 m depth, gives estimates of the particle dynamics (settling velocities S~ 500-1300 m/y, adsorption and desorption rate constants of 0.1-0.4 1/y and 1-6 1/y respectively). Particulate 234Th/230Th activity ratio shows a depth dependence, with decreasing ratio with increasing depth in agreement with previous studies, but no relationship with particle size was found. 231Pa and thorium isotope fractionation and partition coefficients were investigated with particle size vs depth and latitude and appear to vary horizontally following a North-South gradient. This suggests that both radionuclides are mostly bound to the fine suspended particles. At Drake Passage, the 230Thxs distribution is controlled by a southward upwelling of deep water (clearly visible on the vertical section of total 230Thxs, defined as dissolved + particulate concentrations) and reversible-scavenging processes (linear increase of 230Thxs with increasing depth) with North of the Southern ACC Front, higher settling velocities and less adsorption/desorption cycles, than South of it. Distributions of dissolved and total 231Paxs also reflect the influence of the North-South upwelling but somehow this effect appears to be limited to the upper 1500 m depth of the water column. Below this depth, 231Paxs vertical profiles exhibit contrasted concentrations, with some high dissolved activities in the deep water of the stations in the northern part of the ACC and not South of the ACC. These N-S differences in dissolved ... |
format |
Other/Unknown Material |
author |
Venchiarutti, Célia Rutgers van der Loeff, Michiel M Stimac, Ingrid |
author_facet |
Venchiarutti, Célia Rutgers van der Loeff, Michiel M Stimac, Ingrid |
author_sort |
Venchiarutti, Célia |
title |
Radionuclides measured on 21 water bottle profiles during POLARSTERN cruise ANT-XXIV/3 |
title_short |
Radionuclides measured on 21 water bottle profiles during POLARSTERN cruise ANT-XXIV/3 |
title_full |
Radionuclides measured on 21 water bottle profiles during POLARSTERN cruise ANT-XXIV/3 |
title_fullStr |
Radionuclides measured on 21 water bottle profiles during POLARSTERN cruise ANT-XXIV/3 |
title_full_unstemmed |
Radionuclides measured on 21 water bottle profiles during POLARSTERN cruise ANT-XXIV/3 |
title_sort |
radionuclides measured on 21 water bottle profiles during polarstern cruise ant-xxiv/3 |
publisher |
PANGAEA |
publishDate |
2010 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.746773 https://doi.org/10.1594/PANGAEA.746773 |
op_coverage |
MEDIAN LATITUDE: -57.318548 * MEDIAN LONGITUDE: -23.531386 * SOUTH-BOUND LATITUDE: -70.574900 * WEST-BOUND LONGITUDE: -64.418200 * NORTH-BOUND LATITUDE: -37.016600 * EAST-BOUND LONGITUDE: 12.754800 * DATE/TIME START: 2008-02-11T14:21:00 * DATE/TIME END: 2008-04-11T02:57:00 |
long_lat |
ENVELOPE(-64.418200,12.754800,-37.016600,-70.574900) |
genre |
Antarc* Antarctic Drake Passage Scotia Sea Sea ice South Atlantic Ocean Weddell Sea |
genre_facet |
Antarc* Antarctic Drake Passage Scotia Sea Sea ice South Atlantic Ocean Weddell Sea |
op_source |
Supplement to: Venchiarutti, Célia; Rutgers van der Loeff, Michiel M; Stimac, Ingrid (2011): Scavenging of 231Pa and thorium isotopes based on dissolved and size-fractionated particulate distributions at Drake Passage (ANTXXIV-3). Deep Sea Research Part II: Topical Studies in Oceanography, 58(25-26), 2767-2784, https://doi.org/10.1016/j.dsr2.2010.10.040 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.746773 https://doi.org/10.1594/PANGAEA.746773 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1594/PANGAEA.74677310.1016/j.dsr2.2010.10.040 |
_version_ |
1810489145550700544 |
spelling |
ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.746773 2024-09-15T17:42:32+00:00 Radionuclides measured on 21 water bottle profiles during POLARSTERN cruise ANT-XXIV/3 Venchiarutti, Célia Rutgers van der Loeff, Michiel M Stimac, Ingrid MEDIAN LATITUDE: -57.318548 * MEDIAN LONGITUDE: -23.531386 * SOUTH-BOUND LATITUDE: -70.574900 * WEST-BOUND LONGITUDE: -64.418200 * NORTH-BOUND LATITUDE: -37.016600 * EAST-BOUND LONGITUDE: 12.754800 * DATE/TIME START: 2008-02-11T14:21:00 * DATE/TIME END: 2008-04-11T02:57:00 2010 application/zip, 21 datasets https://doi.pangaea.de/10.1594/PANGAEA.746773 https://doi.org/10.1594/PANGAEA.746773 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.746773 https://doi.org/10.1594/PANGAEA.746773 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess Supplement to: Venchiarutti, Célia; Rutgers van der Loeff, Michiel M; Stimac, Ingrid (2011): Scavenging of 231Pa and thorium isotopes based on dissolved and size-fractionated particulate distributions at Drake Passage (ANTXXIV-3). Deep Sea Research Part II: Topical Studies in Oceanography, 58(25-26), 2767-2784, https://doi.org/10.1016/j.dsr2.2010.10.040 ANT-XXIV/3 AWI_MarGeoChem CTD/Rosette ultra clean CTD-RO CTD-UC Drake Passage GEOTRACES Global marine biogeochemical cycles of trace elements and their isotopes Marine Geochemistry @ AWI MULT Multiple investigations Polarstern Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas PS71 PS71/097-2 PS71/099-2 PS71/101-3 PS71/104-6 PS71/104-8 PS71/113-4 PS71/131-6 PS71/154-1 PS71/161-4 PS71/161-6 PS71/178-3 PS71/193-6 PS71/193-7 PS71/222-2 PS71/230-4 PS71/230-6 PS71/236-6 PS71/241-7 PS71/244-10 PS71/244-8 PS71/250-1 Scotia Sea southwest Atlantic South Atlantic Ocean SPP1158 Weddell Sea dataset publication series 2010 ftpangaea https://doi.org/10.1594/PANGAEA.74677310.1016/j.dsr2.2010.10.040 2024-07-24T02:31:20Z Drake Passage is a major route for many water masses from the strong Antarctic Circumpolar Current. During the ANTXXIV-3 expedition (in 2008) the vertical distributions of dissolved and size-fractionated particulate 231Pa and thorium isotopes (230Th, 232Th and 234Th) were investigated in order to better define the scavenging regimes and the effects of the oceanic circulation on the fate of particulate material and on the Pa-Th distributions in the water column. The reversible scavenging-model applied to both 230Th and 234Th, in the upper 1500 m depth, gives estimates of the particle dynamics (settling velocities S~ 500-1300 m/y, adsorption and desorption rate constants of 0.1-0.4 1/y and 1-6 1/y respectively). Particulate 234Th/230Th activity ratio shows a depth dependence, with decreasing ratio with increasing depth in agreement with previous studies, but no relationship with particle size was found. 231Pa and thorium isotope fractionation and partition coefficients were investigated with particle size vs depth and latitude and appear to vary horizontally following a North-South gradient. This suggests that both radionuclides are mostly bound to the fine suspended particles. At Drake Passage, the 230Thxs distribution is controlled by a southward upwelling of deep water (clearly visible on the vertical section of total 230Thxs, defined as dissolved + particulate concentrations) and reversible-scavenging processes (linear increase of 230Thxs with increasing depth) with North of the Southern ACC Front, higher settling velocities and less adsorption/desorption cycles, than South of it. Distributions of dissolved and total 231Paxs also reflect the influence of the North-South upwelling but somehow this effect appears to be limited to the upper 1500 m depth of the water column. Below this depth, 231Paxs vertical profiles exhibit contrasted concentrations, with some high dissolved activities in the deep water of the stations in the northern part of the ACC and not South of the ACC. These N-S differences in dissolved ... Other/Unknown Material Antarc* Antarctic Drake Passage Scotia Sea Sea ice South Atlantic Ocean Weddell Sea PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(-64.418200,12.754800,-37.016600,-70.574900) |