SST time-series for Eastern Arabian Sea recostructed from paired measurement of δ¹⁸O and Mg/Ca of planktonic foraminifera
The deglacial transition from the last glacial maximum at ∼20 kiloyears before present (ka) to the Holocene (11.7 ka to Present) was interrupted by millennial-scale cold reversals, viz., Antarctic Cold Reversal (∼14.5–12.8 ka) and Greenland Younger Dryas (∼12.8–11.8 ka) which had different timings a...
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ftdatacite:10.1594/pangaea.859426 2023-05-15T14:05:25+02:00 SST time-series for Eastern Arabian Sea recostructed from paired measurement of δ¹⁸O and Mg/Ca of planktonic foraminifera Banakar, Virupaxa K Baidya, Sweta Piotrowski, Alexander M Shankar, Doraiswami 2016 text/tab-separated-values https://dx.doi.org/10.1594/pangaea.859426 https://doi.pangaea.de/10.1594/PANGAEA.859426 en eng PANGAEA - Data Publisher for Earth & Environmental Science https://store.pangaea.de/Publications/BanakaV-etal_2016/VKB-etal_DataSheet.xlsx https://store.pangaea.de/Publications/BanakaV-etal_2016/VKB-etal_DataSheet.xlsx https://dx.doi.org/10.1007/s12040-017-0864-5 Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 CC-BY DEPTH, sediment/rock AGE Age, comment Globigerinoides sacculifer, δ18O Globigerinoides sacculifer, Magnesium/Calcium ratio Sea surface temperature, annual mean δ18O, water Sea surface salinity Gravity corer Calculated from Mg/Ca ratios Dekens et al. 2002 Calculated Epstein et al., 1953 Calculated Dataset dataset 2016 ftdatacite https://doi.org/10.1594/pangaea.859426 https://doi.org/10.1007/s12040-017-0864-5 2022-02-09T13:17:41Z The deglacial transition from the last glacial maximum at ∼20 kiloyears before present (ka) to the Holocene (11.7 ka to Present) was interrupted by millennial-scale cold reversals, viz., Antarctic Cold Reversal (∼14.5–12.8 ka) and Greenland Younger Dryas (∼12.8–11.8 ka) which had different timings and extent of cooling in each hemisphere. The cause of this synchronously initiated, but different hemispheric cooling during these cold reversals (Antarctic Cold Reversal ∼3∘C and Younger Dryas ∼10∘C) is elusive because CO2, the fundamental forcing for deglaciation, and Atlantic meridional overturning circulation, the driver of antiphased bipolar climate response, both fail to explain this asymmetry. We use centennial-resolution records of the local surface water ????18O of the Eastern Arabian Sea, which constitutes a proxy for the precipitation associated with the Indian Summer Monsoon, and other tropical precipitation records to deduce the role of tropical forcing in the polar cold reversals. We hypothesize a mechanism for tropical forcing, via the Indian Summer Monsoons, of the polar cold reversals by migration of the Inter-Tropical Convergence Zone and the associated cross-equatorial heat transport. Dataset Antarc* Antarctic Greenland Planktonic foraminifera DataCite Metadata Store (German National Library of Science and Technology) Antarctic Greenland Indian |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
DEPTH, sediment/rock AGE Age, comment Globigerinoides sacculifer, δ18O Globigerinoides sacculifer, Magnesium/Calcium ratio Sea surface temperature, annual mean δ18O, water Sea surface salinity Gravity corer Calculated from Mg/Ca ratios Dekens et al. 2002 Calculated Epstein et al., 1953 Calculated |
spellingShingle |
DEPTH, sediment/rock AGE Age, comment Globigerinoides sacculifer, δ18O Globigerinoides sacculifer, Magnesium/Calcium ratio Sea surface temperature, annual mean δ18O, water Sea surface salinity Gravity corer Calculated from Mg/Ca ratios Dekens et al. 2002 Calculated Epstein et al., 1953 Calculated Banakar, Virupaxa K Baidya, Sweta Piotrowski, Alexander M Shankar, Doraiswami SST time-series for Eastern Arabian Sea recostructed from paired measurement of δ¹⁸O and Mg/Ca of planktonic foraminifera |
topic_facet |
DEPTH, sediment/rock AGE Age, comment Globigerinoides sacculifer, δ18O Globigerinoides sacculifer, Magnesium/Calcium ratio Sea surface temperature, annual mean δ18O, water Sea surface salinity Gravity corer Calculated from Mg/Ca ratios Dekens et al. 2002 Calculated Epstein et al., 1953 Calculated |
description |
The deglacial transition from the last glacial maximum at ∼20 kiloyears before present (ka) to the Holocene (11.7 ka to Present) was interrupted by millennial-scale cold reversals, viz., Antarctic Cold Reversal (∼14.5–12.8 ka) and Greenland Younger Dryas (∼12.8–11.8 ka) which had different timings and extent of cooling in each hemisphere. The cause of this synchronously initiated, but different hemispheric cooling during these cold reversals (Antarctic Cold Reversal ∼3∘C and Younger Dryas ∼10∘C) is elusive because CO2, the fundamental forcing for deglaciation, and Atlantic meridional overturning circulation, the driver of antiphased bipolar climate response, both fail to explain this asymmetry. We use centennial-resolution records of the local surface water ????18O of the Eastern Arabian Sea, which constitutes a proxy for the precipitation associated with the Indian Summer Monsoon, and other tropical precipitation records to deduce the role of tropical forcing in the polar cold reversals. We hypothesize a mechanism for tropical forcing, via the Indian Summer Monsoons, of the polar cold reversals by migration of the Inter-Tropical Convergence Zone and the associated cross-equatorial heat transport. |
format |
Dataset |
author |
Banakar, Virupaxa K Baidya, Sweta Piotrowski, Alexander M Shankar, Doraiswami |
author_facet |
Banakar, Virupaxa K Baidya, Sweta Piotrowski, Alexander M Shankar, Doraiswami |
author_sort |
Banakar, Virupaxa K |
title |
SST time-series for Eastern Arabian Sea recostructed from paired measurement of δ¹⁸O and Mg/Ca of planktonic foraminifera |
title_short |
SST time-series for Eastern Arabian Sea recostructed from paired measurement of δ¹⁸O and Mg/Ca of planktonic foraminifera |
title_full |
SST time-series for Eastern Arabian Sea recostructed from paired measurement of δ¹⁸O and Mg/Ca of planktonic foraminifera |
title_fullStr |
SST time-series for Eastern Arabian Sea recostructed from paired measurement of δ¹⁸O and Mg/Ca of planktonic foraminifera |
title_full_unstemmed |
SST time-series for Eastern Arabian Sea recostructed from paired measurement of δ¹⁸O and Mg/Ca of planktonic foraminifera |
title_sort |
sst time-series for eastern arabian sea recostructed from paired measurement of δ¹⁸o and mg/ca of planktonic foraminifera |
publisher |
PANGAEA - Data Publisher for Earth & Environmental Science |
publishDate |
2016 |
url |
https://dx.doi.org/10.1594/pangaea.859426 https://doi.pangaea.de/10.1594/PANGAEA.859426 |
geographic |
Antarctic Greenland Indian |
geographic_facet |
Antarctic Greenland Indian |
genre |
Antarc* Antarctic Greenland Planktonic foraminifera |
genre_facet |
Antarc* Antarctic Greenland Planktonic foraminifera |
op_relation |
https://store.pangaea.de/Publications/BanakaV-etal_2016/VKB-etal_DataSheet.xlsx https://store.pangaea.de/Publications/BanakaV-etal_2016/VKB-etal_DataSheet.xlsx https://dx.doi.org/10.1007/s12040-017-0864-5 |
op_rights |
Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/pangaea.859426 https://doi.org/10.1007/s12040-017-0864-5 |
_version_ |
1766277298307203072 |