Stable carbon and oxygen isotope analyses of Neogloboquadrina pachyderma
Detailed records of the carbon and oxygen isotopic ratios of Neogloboquadrina pachyderma are compared between nine high-latitude sediment cores, from the Northern and Southern Hemispheres, covering the last 140000 yrs. The strong analogies between the delta13C records permit to define a delta13C str...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.726109 2023-05-15T17:14:57+02:00 Stable carbon and oxygen isotope analyses of Neogloboquadrina pachyderma Labeyrie, Laurent D Duplessy, Jean-Claude MEDIAN LATITUDE: 36.874195 * MEDIAN LONGITUDE: -4.944505 * SOUTH-BOUND LATITUDE: -54.060000 * WEST-BOUND LONGITUDE: -83.520000 * NORTH-BOUND LATITUDE: 79.266700 * EAST-BOUND LONGITUDE: 67.440000 * DATE/TIME START: 1963-04-07T00:00:00 * DATE/TIME END: 1982-01-01T00:00:00 1985-07-27 application/zip, 21 datasets https://doi.pangaea.de/10.1594/PANGAEA.726109 https://doi.org/10.1594/PANGAEA.726109 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.726109 https://doi.org/10.1594/PANGAEA.726109 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Labeyrie, Laurent D; Duplessy, Jean-Claude (1985): Changes in the oceanic 13C/12C ratio during the last 140.000 years: high latitude surface water records. Palaeogeography, Palaeoclimatology, Palaeoecology, 50(2-3), 217-240, https://doi.org/10.1016/0031-0182(85)90069-0 ANTIPROD APSARA1 Atlantic Ocean CEPAG CH67-19 CH69-32 CH69-69 CH6X CH70-K11 CH72-101 CH72-104 CH73-110 CH73-136 CH73-139 CH73-139C CH73-144 CH77-07 CH7X Core GC GEOGAS Glacial Atlantic Ocean Mapping GLAMAP2000 Gravity corer HU75-41 HU75-42 Indian Ocean Jean Charcot Le Noroit Le Suroît Marion Dufresne (1972) MD00 MD73025-2 MD73026 MD80-304 MD82-424 MG138 NO77/79 NO79-06 OSIRIS I PC Piston corer ROMANCHA South Atlantic South Indian Ocean SU81-47 V19 V19-30 V23 Dataset 1985 ftpangaea https://doi.org/10.1594/PANGAEA.726109 https://doi.org/10.1016/0031-0182(85)90069-0 2023-01-20T07:31:28Z Detailed records of the carbon and oxygen isotopic ratios of Neogloboquadrina pachyderma are compared between nine high-latitude sediment cores, from the Northern and Southern Hemispheres, covering the last 140000 yrs. The strong analogies between the delta13C records permit to define a delta13C stratigraphic scale, with three clear cut transitions simultaneous with the oxygen isotopic transitions 6/5 (125 kyrs.), 5/4 (65 kyrs.), and 2/1 (13 kyrs.). The delta13C records of N. pachyderma in the high-latitude cores, which follow the changes in delta13C of the surface water TCO2 near areas of deep water formation present trends similar to the benthic foraminifera delta13C records in cores V19-30 and M12-392, although amplitudes of the isotopic shifts are different. This implies that a large part of the observed variations represents global changes in the carbon distribution between biosphere and ocean. The 13C/12C ratios of N. pachyderma in the North Atlantic cores display larger regional variations at 18 kyrs. B.P. than at present. To explain these differences, we have plotted the 18 kyrs. B.P. delta13C values of N. pachyderma from 17 cores distributed N of 40°N. Comparison with published surface water temperature distribution at 18 kyrs. B.P. indicates that a strong divergent cyclonic cell, centered approximatively 55°N and 15°W, was active during most of the last ice-age maximum. This hydrology, analogous to the present Weddell Sea, explains the published evidences of bottom water formation, if located on the northern flank of the gyre, and the strong polar front on the southern flank, probable location of intermediate water formation. Dataset Neogloboquadrina pachyderma North Atlantic Weddell Sea PANGAEA - Data Publisher for Earth & Environmental Science Charcot ENVELOPE(139.017,139.017,-69.367,-69.367) Indian Weddell Weddell Sea ENVELOPE(-83.520000,67.440000,79.266700,-54.060000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
ANTIPROD APSARA1 Atlantic Ocean CEPAG CH67-19 CH69-32 CH69-69 CH6X CH70-K11 CH72-101 CH72-104 CH73-110 CH73-136 CH73-139 CH73-139C CH73-144 CH77-07 CH7X Core GC GEOGAS Glacial Atlantic Ocean Mapping GLAMAP2000 Gravity corer HU75-41 HU75-42 Indian Ocean Jean Charcot Le Noroit Le Suroît Marion Dufresne (1972) MD00 MD73025-2 MD73026 MD80-304 MD82-424 MG138 NO77/79 NO79-06 OSIRIS I PC Piston corer ROMANCHA South Atlantic South Indian Ocean SU81-47 V19 V19-30 V23 |
spellingShingle |
ANTIPROD APSARA1 Atlantic Ocean CEPAG CH67-19 CH69-32 CH69-69 CH6X CH70-K11 CH72-101 CH72-104 CH73-110 CH73-136 CH73-139 CH73-139C CH73-144 CH77-07 CH7X Core GC GEOGAS Glacial Atlantic Ocean Mapping GLAMAP2000 Gravity corer HU75-41 HU75-42 Indian Ocean Jean Charcot Le Noroit Le Suroît Marion Dufresne (1972) MD00 MD73025-2 MD73026 MD80-304 MD82-424 MG138 NO77/79 NO79-06 OSIRIS I PC Piston corer ROMANCHA South Atlantic South Indian Ocean SU81-47 V19 V19-30 V23 Labeyrie, Laurent D Duplessy, Jean-Claude Stable carbon and oxygen isotope analyses of Neogloboquadrina pachyderma |
topic_facet |
ANTIPROD APSARA1 Atlantic Ocean CEPAG CH67-19 CH69-32 CH69-69 CH6X CH70-K11 CH72-101 CH72-104 CH73-110 CH73-136 CH73-139 CH73-139C CH73-144 CH77-07 CH7X Core GC GEOGAS Glacial Atlantic Ocean Mapping GLAMAP2000 Gravity corer HU75-41 HU75-42 Indian Ocean Jean Charcot Le Noroit Le Suroît Marion Dufresne (1972) MD00 MD73025-2 MD73026 MD80-304 MD82-424 MG138 NO77/79 NO79-06 OSIRIS I PC Piston corer ROMANCHA South Atlantic South Indian Ocean SU81-47 V19 V19-30 V23 |
description |
Detailed records of the carbon and oxygen isotopic ratios of Neogloboquadrina pachyderma are compared between nine high-latitude sediment cores, from the Northern and Southern Hemispheres, covering the last 140000 yrs. The strong analogies between the delta13C records permit to define a delta13C stratigraphic scale, with three clear cut transitions simultaneous with the oxygen isotopic transitions 6/5 (125 kyrs.), 5/4 (65 kyrs.), and 2/1 (13 kyrs.). The delta13C records of N. pachyderma in the high-latitude cores, which follow the changes in delta13C of the surface water TCO2 near areas of deep water formation present trends similar to the benthic foraminifera delta13C records in cores V19-30 and M12-392, although amplitudes of the isotopic shifts are different. This implies that a large part of the observed variations represents global changes in the carbon distribution between biosphere and ocean. The 13C/12C ratios of N. pachyderma in the North Atlantic cores display larger regional variations at 18 kyrs. B.P. than at present. To explain these differences, we have plotted the 18 kyrs. B.P. delta13C values of N. pachyderma from 17 cores distributed N of 40°N. Comparison with published surface water temperature distribution at 18 kyrs. B.P. indicates that a strong divergent cyclonic cell, centered approximatively 55°N and 15°W, was active during most of the last ice-age maximum. This hydrology, analogous to the present Weddell Sea, explains the published evidences of bottom water formation, if located on the northern flank of the gyre, and the strong polar front on the southern flank, probable location of intermediate water formation. |
format |
Dataset |
author |
Labeyrie, Laurent D Duplessy, Jean-Claude |
author_facet |
Labeyrie, Laurent D Duplessy, Jean-Claude |
author_sort |
Labeyrie, Laurent D |
title |
Stable carbon and oxygen isotope analyses of Neogloboquadrina pachyderma |
title_short |
Stable carbon and oxygen isotope analyses of Neogloboquadrina pachyderma |
title_full |
Stable carbon and oxygen isotope analyses of Neogloboquadrina pachyderma |
title_fullStr |
Stable carbon and oxygen isotope analyses of Neogloboquadrina pachyderma |
title_full_unstemmed |
Stable carbon and oxygen isotope analyses of Neogloboquadrina pachyderma |
title_sort |
stable carbon and oxygen isotope analyses of neogloboquadrina pachyderma |
publisher |
PANGAEA |
publishDate |
1985 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.726109 https://doi.org/10.1594/PANGAEA.726109 |
op_coverage |
MEDIAN LATITUDE: 36.874195 * MEDIAN LONGITUDE: -4.944505 * SOUTH-BOUND LATITUDE: -54.060000 * WEST-BOUND LONGITUDE: -83.520000 * NORTH-BOUND LATITUDE: 79.266700 * EAST-BOUND LONGITUDE: 67.440000 * DATE/TIME START: 1963-04-07T00:00:00 * DATE/TIME END: 1982-01-01T00:00:00 |
long_lat |
ENVELOPE(139.017,139.017,-69.367,-69.367) ENVELOPE(-83.520000,67.440000,79.266700,-54.060000) |
geographic |
Charcot Indian Weddell Weddell Sea |
geographic_facet |
Charcot Indian Weddell Weddell Sea |
genre |
Neogloboquadrina pachyderma North Atlantic Weddell Sea |
genre_facet |
Neogloboquadrina pachyderma North Atlantic Weddell Sea |
op_source |
Supplement to: Labeyrie, Laurent D; Duplessy, Jean-Claude (1985): Changes in the oceanic 13C/12C ratio during the last 140.000 years: high latitude surface water records. Palaeogeography, Palaeoclimatology, Palaeoecology, 50(2-3), 217-240, https://doi.org/10.1016/0031-0182(85)90069-0 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.726109 https://doi.org/10.1594/PANGAEA.726109 |
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.726109 https://doi.org/10.1016/0031-0182(85)90069-0 |
_version_ |
1766073064634712064 |