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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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.859426 2023-05-15T14:03:05+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 LATITUDE: 15.491500 * LONGITUDE: 72.727330 * DATE/TIME START: 2008-10-15T00:00:00 * DATE/TIME END: 2008-10-15T00:00:00 * MINIMUM DEPTH, sediment/rock: 0.59 m * MAXIMUM DEPTH, sediment/rock: 4.21 m 2016-04-08 text/tab-separated-values, 461 data points https://doi.pangaea.de/10.1594/PANGAEA.859426 https://doi.org/10.1594/PANGAEA.859426 en eng PANGAEA SST time-series for Eastern Arabian Sea (URI: https://store.pangaea.de/Publications/BanakaV-etal_2016/VKB-etal_DataSheet.xlsx) Banakar, Virupaxa K; Baidya, Sweta; Piotrowski, Alexander M; Shankar, Doraiswami (2017): Indian summer monsoon forcing on the deglacial polar cold reversals. Journal of Earth System Science, 126(6), https://doi.org/10.1007/s12040-017-0864-5 https://doi.pangaea.de/10.1594/PANGAEA.859426 https://doi.org/10.1594/PANGAEA.859426 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY ABP32GC01R AGE comment Calculated Calculated (Epstein et al. 1953) Calculated from Mg/Ca ratios (Dekens et al. 2002) DEPTH sediment/rock Eastern Arabian Sea GC Globigerinoides sacculifer Magnesium/Calcium ratio δ18O Gravity corer Sea surface salinity Sea surface temperature annual mean water Dataset 2016 ftpangaea https://doi.org/10.1594/PANGAEA.859426 https://doi.org/10.1007/s12040-017-0864-5 2023-01-20T09:07:04Z 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 PANGAEA - Data Publisher for Earth & Environmental Science Antarctic Greenland Indian ENVELOPE(72.727330,72.727330,15.491500,15.491500) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
ABP32GC01R AGE comment Calculated Calculated (Epstein et al. 1953) Calculated from Mg/Ca ratios (Dekens et al. 2002) DEPTH sediment/rock Eastern Arabian Sea GC Globigerinoides sacculifer Magnesium/Calcium ratio δ18O Gravity corer Sea surface salinity Sea surface temperature annual mean water |
spellingShingle |
ABP32GC01R AGE comment Calculated Calculated (Epstein et al. 1953) Calculated from Mg/Ca ratios (Dekens et al. 2002) DEPTH sediment/rock Eastern Arabian Sea GC Globigerinoides sacculifer Magnesium/Calcium ratio δ18O Gravity corer Sea surface salinity Sea surface temperature annual mean water 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 |
ABP32GC01R AGE comment Calculated Calculated (Epstein et al. 1953) Calculated from Mg/Ca ratios (Dekens et al. 2002) DEPTH sediment/rock Eastern Arabian Sea GC Globigerinoides sacculifer Magnesium/Calcium ratio δ18O Gravity corer Sea surface salinity Sea surface temperature annual mean water |
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 |
publishDate |
2016 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.859426 https://doi.org/10.1594/PANGAEA.859426 |
op_coverage |
LATITUDE: 15.491500 * LONGITUDE: 72.727330 * DATE/TIME START: 2008-10-15T00:00:00 * DATE/TIME END: 2008-10-15T00:00:00 * MINIMUM DEPTH, sediment/rock: 0.59 m * MAXIMUM DEPTH, sediment/rock: 4.21 m |
long_lat |
ENVELOPE(72.727330,72.727330,15.491500,15.491500) |
geographic |
Antarctic Greenland Indian |
geographic_facet |
Antarctic Greenland Indian |
genre |
Antarc* Antarctic Greenland Planktonic foraminifera |
genre_facet |
Antarc* Antarctic Greenland Planktonic foraminifera |
op_relation |
SST time-series for Eastern Arabian Sea (URI: https://store.pangaea.de/Publications/BanakaV-etal_2016/VKB-etal_DataSheet.xlsx) Banakar, Virupaxa K; Baidya, Sweta; Piotrowski, Alexander M; Shankar, Doraiswami (2017): Indian summer monsoon forcing on the deglacial polar cold reversals. Journal of Earth System Science, 126(6), https://doi.org/10.1007/s12040-017-0864-5 https://doi.pangaea.de/10.1594/PANGAEA.859426 https://doi.org/10.1594/PANGAEA.859426 |
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.859426 https://doi.org/10.1007/s12040-017-0864-5 |
_version_ |
1766273612199755776 |