Isotope tracers (Delta δ¹³C) in Weddell Sea water during POLARSTERN cruise ANT-XII/3
Stable oxygen isotopic composition of sea water and stable carbon isotopes of dissolved inorganic carbon (DIC) on the continental shelf in the southern Weddell Sea are presented. Using the stations sampled during the summer 1995 two sections can be constructed, one closely parallel to the ice shelf...
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Format: | Dataset |
Language: | English |
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PANGAEA
2001
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Subjects: | |
Online Access: | https://doi.pangaea.de/10.1594/PANGAEA.55750 https://doi.org/10.1594/PANGAEA.55750 |
id |
ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.55750 |
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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-XII/3 AWI_Paleo Calculated Date/Time of event DEPTH water Elevation of event Event label FR-6 Latitude of event Longitude of event Mass spectrometer Finnigan MAT 251 MULT Multiple investigations Paleoenvironmental Reconstructions from Marine Sediments @ AWI Polarstern PS34 PS34/113 PS34/114 PS34/115 PS34/118 PS34/120 PS34/122 PS34/124 PS34/128 PS34/131 PS34/134 PS34/136 PS34/137 PS34/138 PS34/139 PS34/140 PS34/141 PS34/142 PS34/143 PS34/144 PS34/145 PS34/147 PS34/148 PS34/151 PS34/152 PS34/153 PS34/156 PS34/159 PS34/160 PS34/161 PS34/162 PS34/163 PS34/164 PS34/165 |
spellingShingle |
ANT-XII/3 AWI_Paleo Calculated Date/Time of event DEPTH water Elevation of event Event label FR-6 Latitude of event Longitude of event Mass spectrometer Finnigan MAT 251 MULT Multiple investigations Paleoenvironmental Reconstructions from Marine Sediments @ AWI Polarstern PS34 PS34/113 PS34/114 PS34/115 PS34/118 PS34/120 PS34/122 PS34/124 PS34/128 PS34/131 PS34/134 PS34/136 PS34/137 PS34/138 PS34/139 PS34/140 PS34/141 PS34/142 PS34/143 PS34/144 PS34/145 PS34/147 PS34/148 PS34/151 PS34/152 PS34/153 PS34/156 PS34/159 PS34/160 PS34/161 PS34/162 PS34/163 PS34/164 PS34/165 Mackensen, Andreas Isotope tracers (Delta δ¹³C) in Weddell Sea water during POLARSTERN cruise ANT-XII/3 |
topic_facet |
ANT-XII/3 AWI_Paleo Calculated Date/Time of event DEPTH water Elevation of event Event label FR-6 Latitude of event Longitude of event Mass spectrometer Finnigan MAT 251 MULT Multiple investigations Paleoenvironmental Reconstructions from Marine Sediments @ AWI Polarstern PS34 PS34/113 PS34/114 PS34/115 PS34/118 PS34/120 PS34/122 PS34/124 PS34/128 PS34/131 PS34/134 PS34/136 PS34/137 PS34/138 PS34/139 PS34/140 PS34/141 PS34/142 PS34/143 PS34/144 PS34/145 PS34/147 PS34/148 PS34/151 PS34/152 PS34/153 PS34/156 PS34/159 PS34/160 PS34/161 PS34/162 PS34/163 PS34/164 PS34/165 |
description |
Stable oxygen isotopic composition of sea water and stable carbon isotopes of dissolved inorganic carbon (DIC) on the continental shelf in the southern Weddell Sea are presented. Using the stations sampled during the summer 1995 two sections can be constructed, one closely parallel to the ice shelf edge and the other perpendicular to the upper continental slope. Generally, delta18O values clearly separate between different shelf water masses depending on the content of meteoric meltwater added during melting of glacial ice. Extrapolation of the mixing line between the cores of High Salinity Shelf Water (HSSW) and supercooled Ice Shelf Water (ISW) reveals delta18O values of the glacial ice of -27 per mil, whereas extrapolation of the mixing line between the delta18O values of the most-saline HSSW and lowest temperature ISW results in delta18O values of -34 per mil for glacial ice. These values point to an origin of meltwater from below the ice shelf, where ice is less depleted in 18O, since deep beneath the ice shelf close to the grounding line, values may reach -40 per mil. If values between -34 and -27 per mil are used as delta18O end member values for glacial ice, the amount of meltwater from the ice shelf that adds to the formation of ISW off the Filchner-Ronne Ice Shelf ranges from 0.2 to 0.8%, in agreement with previous studies based on delta18O and 4He. Carbon isotopic fractionation due to gas exchange between the atmosphere and the ocean at cold temperatures results in Delta delta13CDIC values of 0.20 +/- 0.17 per mil for Weddell Sea Deep Water, the water mass that ventilates the global abyssal ocean, typically defined as Antarctic Bottom Water (AABW). This confirms the low end of the range estimated previously (0.2-0.4 per mil), and thus corroborates the dominance of biology in shaping the deep and bottom water delta13C signal. It has been hypothesized that different modes of glacial/interglacial Antarctic bottom water formation may be separated by different stable isotopic compositions of deep-sea ... |
format |
Dataset |
author |
Mackensen, Andreas |
author_facet |
Mackensen, Andreas |
author_sort |
Mackensen, Andreas |
title |
Isotope tracers (Delta δ¹³C) in Weddell Sea water during POLARSTERN cruise ANT-XII/3 |
title_short |
Isotope tracers (Delta δ¹³C) in Weddell Sea water during POLARSTERN cruise ANT-XII/3 |
title_full |
Isotope tracers (Delta δ¹³C) in Weddell Sea water during POLARSTERN cruise ANT-XII/3 |
title_fullStr |
Isotope tracers (Delta δ¹³C) in Weddell Sea water during POLARSTERN cruise ANT-XII/3 |
title_full_unstemmed |
Isotope tracers (Delta δ¹³C) in Weddell Sea water during POLARSTERN cruise ANT-XII/3 |
title_sort |
isotope tracers (delta δ¹³c) in weddell sea water during polarstern cruise ant-xii/3 |
publisher |
PANGAEA |
publishDate |
2001 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.55750 https://doi.org/10.1594/PANGAEA.55750 |
op_coverage |
MEDIAN LATITUDE: -75.375660 * MEDIAN LONGITUDE: -44.808553 * SOUTH-BOUND LATITUDE: -77.635000 * WEST-BOUND LONGITUDE: -60.846660 * NORTH-BOUND LATITUDE: -73.001667 * EAST-BOUND LONGITUDE: -29.998333 * DATE/TIME START: 1995-01-25T12:28:00 * DATE/TIME END: 1995-03-04T04:13:00 * MINIMUM DEPTH, water: 4.55 m * MAXIMUM DEPTH, water: 3297.63 m |
long_lat |
ENVELOPE(-61.000,-61.000,-78.500,-78.500) ENVELOPE(-60.846660,-29.998333,-73.001667,-77.635000) |
geographic |
Antarctic Ronne Ice Shelf Weddell Weddell Sea |
geographic_facet |
Antarctic Ronne Ice Shelf Weddell Weddell Sea |
genre |
Antarc* Antarctic Filchner Ronne Ice Shelf Filchner-Ronne Ice Shelf Ice Shelf Ronne Ice Shelf Weddell Sea |
genre_facet |
Antarc* Antarctic Filchner Ronne Ice Shelf Filchner-Ronne Ice Shelf Ice Shelf Ronne Ice Shelf Weddell Sea |
op_source |
Supplement to: Mackensen, Andreas (2001): Oxygen and carbon stable isotope tracers of Weddell Sea water masses: new data and some paleoceanographic implications. Deep Sea Research Part I: Oceanographic Research Papers, 48(6), 1401-1422, https://doi.org/10.1016/S0967-0637(00)00093-5 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.55750 https://doi.org/10.1594/PANGAEA.55750 |
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.55750 https://doi.org/10.1016/S0967-0637(00)00093-5 |
_version_ |
1766275947217027072 |
spelling |
ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.55750 2023-05-15T14:04:42+02:00 Isotope tracers (Delta δ¹³C) in Weddell Sea water during POLARSTERN cruise ANT-XII/3 Mackensen, Andreas MEDIAN LATITUDE: -75.375660 * MEDIAN LONGITUDE: -44.808553 * SOUTH-BOUND LATITUDE: -77.635000 * WEST-BOUND LONGITUDE: -60.846660 * NORTH-BOUND LATITUDE: -73.001667 * EAST-BOUND LONGITUDE: -29.998333 * DATE/TIME START: 1995-01-25T12:28:00 * DATE/TIME END: 1995-03-04T04:13:00 * MINIMUM DEPTH, water: 4.55 m * MAXIMUM DEPTH, water: 3297.63 m 2001-10-07 text/tab-separated-values, 1886 data points https://doi.pangaea.de/10.1594/PANGAEA.55750 https://doi.org/10.1594/PANGAEA.55750 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.55750 https://doi.org/10.1594/PANGAEA.55750 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Mackensen, Andreas (2001): Oxygen and carbon stable isotope tracers of Weddell Sea water masses: new data and some paleoceanographic implications. Deep Sea Research Part I: Oceanographic Research Papers, 48(6), 1401-1422, https://doi.org/10.1016/S0967-0637(00)00093-5 ANT-XII/3 AWI_Paleo Calculated Date/Time of event DEPTH water Elevation of event Event label FR-6 Latitude of event Longitude of event Mass spectrometer Finnigan MAT 251 MULT Multiple investigations Paleoenvironmental Reconstructions from Marine Sediments @ AWI Polarstern PS34 PS34/113 PS34/114 PS34/115 PS34/118 PS34/120 PS34/122 PS34/124 PS34/128 PS34/131 PS34/134 PS34/136 PS34/137 PS34/138 PS34/139 PS34/140 PS34/141 PS34/142 PS34/143 PS34/144 PS34/145 PS34/147 PS34/148 PS34/151 PS34/152 PS34/153 PS34/156 PS34/159 PS34/160 PS34/161 PS34/162 PS34/163 PS34/164 PS34/165 Dataset 2001 ftpangaea https://doi.org/10.1594/PANGAEA.55750 https://doi.org/10.1016/S0967-0637(00)00093-5 2023-01-20T07:35:52Z Stable oxygen isotopic composition of sea water and stable carbon isotopes of dissolved inorganic carbon (DIC) on the continental shelf in the southern Weddell Sea are presented. Using the stations sampled during the summer 1995 two sections can be constructed, one closely parallel to the ice shelf edge and the other perpendicular to the upper continental slope. Generally, delta18O values clearly separate between different shelf water masses depending on the content of meteoric meltwater added during melting of glacial ice. Extrapolation of the mixing line between the cores of High Salinity Shelf Water (HSSW) and supercooled Ice Shelf Water (ISW) reveals delta18O values of the glacial ice of -27 per mil, whereas extrapolation of the mixing line between the delta18O values of the most-saline HSSW and lowest temperature ISW results in delta18O values of -34 per mil for glacial ice. These values point to an origin of meltwater from below the ice shelf, where ice is less depleted in 18O, since deep beneath the ice shelf close to the grounding line, values may reach -40 per mil. If values between -34 and -27 per mil are used as delta18O end member values for glacial ice, the amount of meltwater from the ice shelf that adds to the formation of ISW off the Filchner-Ronne Ice Shelf ranges from 0.2 to 0.8%, in agreement with previous studies based on delta18O and 4He. Carbon isotopic fractionation due to gas exchange between the atmosphere and the ocean at cold temperatures results in Delta delta13CDIC values of 0.20 +/- 0.17 per mil for Weddell Sea Deep Water, the water mass that ventilates the global abyssal ocean, typically defined as Antarctic Bottom Water (AABW). This confirms the low end of the range estimated previously (0.2-0.4 per mil), and thus corroborates the dominance of biology in shaping the deep and bottom water delta13C signal. It has been hypothesized that different modes of glacial/interglacial Antarctic bottom water formation may be separated by different stable isotopic compositions of deep-sea ... Dataset Antarc* Antarctic Filchner Ronne Ice Shelf Filchner-Ronne Ice Shelf Ice Shelf Ronne Ice Shelf Weddell Sea PANGAEA - Data Publisher for Earth & Environmental Science Antarctic Ronne Ice Shelf ENVELOPE(-61.000,-61.000,-78.500,-78.500) Weddell Weddell Sea ENVELOPE(-60.846660,-29.998333,-73.001667,-77.635000) |