Stable isotope record of foraminifera from the Southern Ocean
Sediment cores from the southern continental margin of Australia are near the formation region of Antarctic Intermediate Water (AAIW) and Subantarctic Mode Water and record the changes in these water masses from the last glacial maximum through the present. Carbon and oxygen isotopes were measured o...
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1994
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.729815 2024-06-02T07:57:49+00:00 Stable isotope record of foraminifera from the Southern Ocean Lynch-Stieglitz, Jean Fairbanks, Richard G Charles, Christopher D MEDIAN LATITUDE: -43.256394 * MEDIAN LONGITUDE: 127.157307 * SOUTH-BOUND LATITUDE: -77.666667 * WEST-BOUND LONGITUDE: -20.860000 * NORTH-BOUND LATITUDE: -37.550000 * EAST-BOUND LONGITUDE: 165.000000 * DATE/TIME START: 1962-07-23T00:00:00 * DATE/TIME END: 1985-04-17T00:00:00 1994 application/zip, 11 datasets https://doi.pangaea.de/10.1594/PANGAEA.729815 https://doi.org/10.1594/PANGAEA.729815 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.729815 https://doi.org/10.1594/PANGAEA.729815 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess Supplement to: Lynch-Stieglitz, Jean; Fairbanks, Richard G; Charles, Christopher D (1994): Glacial-interglacial history of Antarctic Intermediate Water: Relative strengths of Antarctic versus Indian Ocean sources. Paleoceanography, 9(1), 7-30, https://doi.org/10.1029/93PA02446 17SL 7SL ANTIPROD APSARA1 APSARA2 AT_II-107_22 ATII_USA Atlantis II (1963) BLW2 CHN115-26PG CHN115-27PG CHN155-36PG GC Gravity corer Gravity corer (Kiel type) Indian Ocean IO1578 IO1578.005-TC Islas Orcadas Lamont-Doherty Earth Observatory Columbia University LDEO Marion Dufresne (1972) MD00 MD38 MD73025-2 MD73026 MD80-304 MD82-424 MD84-551 OSIRIS I Pacific PC Piston corer RC11 RC1112 RC11-80 RC13 RC13-254 RC13-255 RC13-256 RC13-260 RC13-262TW RC13-263 RC13-267 RC13-269 RC13-271 RC13-275 RC15 RC15-93 Dataset 1994 ftpangaea https://doi.org/10.1594/PANGAEA.72981510.1029/93PA02446 2024-05-07T23:45:53Z Sediment cores from the southern continental margin of Australia are near the formation region of Antarctic Intermediate Water (AAIW) and Subantarctic Mode Water and record the changes in these water masses from the last glacial maximum through the present. Carbon and oxygen isotopes were measured on the benthic foraminiferal species Planulina wuellerstrorfi for both the Recent and last glacial maximum sections of the cores and were then used to reconstruct temperature and carbon isotopic water column profiles. The glacial oxygen isotope profile indicates a vertical temperature structure for this region similar to that in today's Subantarctic Zone. Although intermediate water delta13C cannot be used as a nutrient tracer in this region because of the large influence of air-sea carbon isotopic exchange on this water mass, delta13C can be used as a water mass tracer. Today, AAIW properties reflect contributions from cool, fresh Antarctic Surface Waters (2/3) and warm, salty waters from the Indian Ocean (1/3). When examined in conjuction with the glacial delta13C and delta18C data from the north Indian and Southern Oceans, our data suggest a much reduced contribution of North Indian Ocean intermediate water to glacial Antarctic Intermediate Water relative to the contribution of Antarctic Surface Water. This fresher, cooler glacial Antarctic Intermediate Water would be distributed to the intermediate-depth ocean, thus decreasing the transport of salt produced in the North Indian Ocean to the rest of the world's oceans. Combined with evidence for a reduced influence of North Atlantic Deep Water, these results suggest major changes in the pathways for the redistribution of heat and salt in the glacial ocean. Dataset Antarc* Antarctic North Atlantic Deep Water North Atlantic Southern Ocean PANGAEA - Data Publisher for Earth & Environmental Science Antarctic Southern Ocean Pacific Indian Orcadas ENVELOPE(-44.717,-44.717,-60.750,-60.750) ENVELOPE(-20.860000,165.000000,-37.550000,-77.666667) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
17SL 7SL ANTIPROD APSARA1 APSARA2 AT_II-107_22 ATII_USA Atlantis II (1963) BLW2 CHN115-26PG CHN115-27PG CHN155-36PG GC Gravity corer Gravity corer (Kiel type) Indian Ocean IO1578 IO1578.005-TC Islas Orcadas Lamont-Doherty Earth Observatory Columbia University LDEO Marion Dufresne (1972) MD00 MD38 MD73025-2 MD73026 MD80-304 MD82-424 MD84-551 OSIRIS I Pacific PC Piston corer RC11 RC1112 RC11-80 RC13 RC13-254 RC13-255 RC13-256 RC13-260 RC13-262TW RC13-263 RC13-267 RC13-269 RC13-271 RC13-275 RC15 RC15-93 |
spellingShingle |
17SL 7SL ANTIPROD APSARA1 APSARA2 AT_II-107_22 ATII_USA Atlantis II (1963) BLW2 CHN115-26PG CHN115-27PG CHN155-36PG GC Gravity corer Gravity corer (Kiel type) Indian Ocean IO1578 IO1578.005-TC Islas Orcadas Lamont-Doherty Earth Observatory Columbia University LDEO Marion Dufresne (1972) MD00 MD38 MD73025-2 MD73026 MD80-304 MD82-424 MD84-551 OSIRIS I Pacific PC Piston corer RC11 RC1112 RC11-80 RC13 RC13-254 RC13-255 RC13-256 RC13-260 RC13-262TW RC13-263 RC13-267 RC13-269 RC13-271 RC13-275 RC15 RC15-93 Lynch-Stieglitz, Jean Fairbanks, Richard G Charles, Christopher D Stable isotope record of foraminifera from the Southern Ocean |
topic_facet |
17SL 7SL ANTIPROD APSARA1 APSARA2 AT_II-107_22 ATII_USA Atlantis II (1963) BLW2 CHN115-26PG CHN115-27PG CHN155-36PG GC Gravity corer Gravity corer (Kiel type) Indian Ocean IO1578 IO1578.005-TC Islas Orcadas Lamont-Doherty Earth Observatory Columbia University LDEO Marion Dufresne (1972) MD00 MD38 MD73025-2 MD73026 MD80-304 MD82-424 MD84-551 OSIRIS I Pacific PC Piston corer RC11 RC1112 RC11-80 RC13 RC13-254 RC13-255 RC13-256 RC13-260 RC13-262TW RC13-263 RC13-267 RC13-269 RC13-271 RC13-275 RC15 RC15-93 |
description |
Sediment cores from the southern continental margin of Australia are near the formation region of Antarctic Intermediate Water (AAIW) and Subantarctic Mode Water and record the changes in these water masses from the last glacial maximum through the present. Carbon and oxygen isotopes were measured on the benthic foraminiferal species Planulina wuellerstrorfi for both the Recent and last glacial maximum sections of the cores and were then used to reconstruct temperature and carbon isotopic water column profiles. The glacial oxygen isotope profile indicates a vertical temperature structure for this region similar to that in today's Subantarctic Zone. Although intermediate water delta13C cannot be used as a nutrient tracer in this region because of the large influence of air-sea carbon isotopic exchange on this water mass, delta13C can be used as a water mass tracer. Today, AAIW properties reflect contributions from cool, fresh Antarctic Surface Waters (2/3) and warm, salty waters from the Indian Ocean (1/3). When examined in conjuction with the glacial delta13C and delta18C data from the north Indian and Southern Oceans, our data suggest a much reduced contribution of North Indian Ocean intermediate water to glacial Antarctic Intermediate Water relative to the contribution of Antarctic Surface Water. This fresher, cooler glacial Antarctic Intermediate Water would be distributed to the intermediate-depth ocean, thus decreasing the transport of salt produced in the North Indian Ocean to the rest of the world's oceans. Combined with evidence for a reduced influence of North Atlantic Deep Water, these results suggest major changes in the pathways for the redistribution of heat and salt in the glacial ocean. |
format |
Dataset |
author |
Lynch-Stieglitz, Jean Fairbanks, Richard G Charles, Christopher D |
author_facet |
Lynch-Stieglitz, Jean Fairbanks, Richard G Charles, Christopher D |
author_sort |
Lynch-Stieglitz, Jean |
title |
Stable isotope record of foraminifera from the Southern Ocean |
title_short |
Stable isotope record of foraminifera from the Southern Ocean |
title_full |
Stable isotope record of foraminifera from the Southern Ocean |
title_fullStr |
Stable isotope record of foraminifera from the Southern Ocean |
title_full_unstemmed |
Stable isotope record of foraminifera from the Southern Ocean |
title_sort |
stable isotope record of foraminifera from the southern ocean |
publisher |
PANGAEA |
publishDate |
1994 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.729815 https://doi.org/10.1594/PANGAEA.729815 |
op_coverage |
MEDIAN LATITUDE: -43.256394 * MEDIAN LONGITUDE: 127.157307 * SOUTH-BOUND LATITUDE: -77.666667 * WEST-BOUND LONGITUDE: -20.860000 * NORTH-BOUND LATITUDE: -37.550000 * EAST-BOUND LONGITUDE: 165.000000 * DATE/TIME START: 1962-07-23T00:00:00 * DATE/TIME END: 1985-04-17T00:00:00 |
long_lat |
ENVELOPE(-44.717,-44.717,-60.750,-60.750) ENVELOPE(-20.860000,165.000000,-37.550000,-77.666667) |
geographic |
Antarctic Southern Ocean Pacific Indian Orcadas |
geographic_facet |
Antarctic Southern Ocean Pacific Indian Orcadas |
genre |
Antarc* Antarctic North Atlantic Deep Water North Atlantic Southern Ocean |
genre_facet |
Antarc* Antarctic North Atlantic Deep Water North Atlantic Southern Ocean |
op_source |
Supplement to: Lynch-Stieglitz, Jean; Fairbanks, Richard G; Charles, Christopher D (1994): Glacial-interglacial history of Antarctic Intermediate Water: Relative strengths of Antarctic versus Indian Ocean sources. Paleoceanography, 9(1), 7-30, https://doi.org/10.1029/93PA02446 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.729815 https://doi.org/10.1594/PANGAEA.729815 |
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.72981510.1029/93PA02446 |
_version_ |
1800741018956464128 |