Abrupt weakening of the Indian summer monsoon at 8.2 kyr B.P.
An oxygen isotope record of biogenic carbonate from paleolake Riwasa in northwestern (NW) India provides a history of the Indian Summer Monsoon (ISM) from ∼11 to 6 kyr B.P. The lake was dry throughout the Late Glacial period when aeolian sands were deposited. Lacustrine sedimentation commenced in th...
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2014
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ftucambridgeesc:oai:eprints.esc.cam.ac.uk:2988 2023-05-15T17:28:43+02:00 Abrupt weakening of the Indian summer monsoon at 8.2 kyr B.P. Dixit, Yama Hodell, David A. Sinha, Rajiv Petrie, Cameron A. 2014-04-01 text image http://eprints.esc.cam.ac.uk/2988/ http://eprints.esc.cam.ac.uk/2988/1/1-s2.0-S0012821X14000363-main.pdf http://eprints.esc.cam.ac.uk/2988/2/Dixit%201-s2.0-S0012821X14000363-gr001.jpg http://eprints.esc.cam.ac.uk/2988/3/mmc1.doc http://www.sciencedirect.com/science/article/pii/S0012821X14000363 https://doi.org/10.1016/j.epsl.2014.01.026 en eng Published by Elsevier B.V. http://eprints.esc.cam.ac.uk/2988/1/1-s2.0-S0012821X14000363-main.pdf http://eprints.esc.cam.ac.uk/2988/2/Dixit%201-s2.0-S0012821X14000363-gr001.jpg http://eprints.esc.cam.ac.uk/2988/3/mmc1.doc Dixit, Yama and Hodell, David A. and Sinha, Rajiv and Petrie, Cameron A. (2014) Abrupt weakening of the Indian summer monsoon at 8.2 kyr B.P. Earth and Planetary Science Letters, 391. pp. 16-23. ISSN 0012-821X DOI https://doi.org/10.1016/j.epsl.2014.01.026 <https://doi.org/10.1016/j.epsl.2014.01.026> cc_by CC-BY 01 - Climate Change and Earth-Ocean Atmosphere Systems Article PeerReviewed 2014 ftucambridgeesc https://doi.org/10.1016/j.epsl.2014.01.026 2020-08-27T18:09:30Z An oxygen isotope record of biogenic carbonate from paleolake Riwasa in northwestern (NW) India provides a history of the Indian Summer Monsoon (ISM) from ∼11 to 6 kyr B.P. The lake was dry throughout the Late Glacial period when aeolian sands were deposited. Lacustrine sedimentation commenced in the early Holocene and the lake deepened significantly at ∼9.4 kyr B.P., indicating a strengthening of the ISM in response to summer insolation forcing. This high lake stand was interrupted by an abrupt desiccation, which is marked by a 12-cm limestone hardground that formed during a period of sub-aerial exposure after ∼8.3 kyr B.P. The base of the hardground surface coincides with the beginning of the ‘8.2-kyr B.P. cooling event’ in the North Atlantic that has been associated with a glacial outburst flood and slowdown of Atlantic meridional overturning circulation. The hardground provides robust evidence of a weakening of the ISM on the Indian subcontinent at ∼8.2 kyr B.P., and supports previous results of a strong teleconnection between monsoon Asia and North Atlantic climate. Lacustrine sedimentation resumed at ∼7.9 kyr B.P. suggesting the 8.2-kyr desiccation of paleolake Riwasa represented an abrupt response of the ISM to forcing from the North Atlantic. Article in Journal/Newspaper North Atlantic University of Cambridge, Department of Earth Sciences: ESC Publications Indian Earth and Planetary Science Letters 391 16 23 |
institution |
Open Polar |
collection |
University of Cambridge, Department of Earth Sciences: ESC Publications |
op_collection_id |
ftucambridgeesc |
language |
English |
topic |
01 - Climate Change and Earth-Ocean Atmosphere Systems |
spellingShingle |
01 - Climate Change and Earth-Ocean Atmosphere Systems Dixit, Yama Hodell, David A. Sinha, Rajiv Petrie, Cameron A. Abrupt weakening of the Indian summer monsoon at 8.2 kyr B.P. |
topic_facet |
01 - Climate Change and Earth-Ocean Atmosphere Systems |
description |
An oxygen isotope record of biogenic carbonate from paleolake Riwasa in northwestern (NW) India provides a history of the Indian Summer Monsoon (ISM) from ∼11 to 6 kyr B.P. The lake was dry throughout the Late Glacial period when aeolian sands were deposited. Lacustrine sedimentation commenced in the early Holocene and the lake deepened significantly at ∼9.4 kyr B.P., indicating a strengthening of the ISM in response to summer insolation forcing. This high lake stand was interrupted by an abrupt desiccation, which is marked by a 12-cm limestone hardground that formed during a period of sub-aerial exposure after ∼8.3 kyr B.P. The base of the hardground surface coincides with the beginning of the ‘8.2-kyr B.P. cooling event’ in the North Atlantic that has been associated with a glacial outburst flood and slowdown of Atlantic meridional overturning circulation. The hardground provides robust evidence of a weakening of the ISM on the Indian subcontinent at ∼8.2 kyr B.P., and supports previous results of a strong teleconnection between monsoon Asia and North Atlantic climate. Lacustrine sedimentation resumed at ∼7.9 kyr B.P. suggesting the 8.2-kyr desiccation of paleolake Riwasa represented an abrupt response of the ISM to forcing from the North Atlantic. |
format |
Article in Journal/Newspaper |
author |
Dixit, Yama Hodell, David A. Sinha, Rajiv Petrie, Cameron A. |
author_facet |
Dixit, Yama Hodell, David A. Sinha, Rajiv Petrie, Cameron A. |
author_sort |
Dixit, Yama |
title |
Abrupt weakening of the Indian summer monsoon at 8.2 kyr B.P. |
title_short |
Abrupt weakening of the Indian summer monsoon at 8.2 kyr B.P. |
title_full |
Abrupt weakening of the Indian summer monsoon at 8.2 kyr B.P. |
title_fullStr |
Abrupt weakening of the Indian summer monsoon at 8.2 kyr B.P. |
title_full_unstemmed |
Abrupt weakening of the Indian summer monsoon at 8.2 kyr B.P. |
title_sort |
abrupt weakening of the indian summer monsoon at 8.2 kyr b.p. |
publisher |
Published by Elsevier B.V. |
publishDate |
2014 |
url |
http://eprints.esc.cam.ac.uk/2988/ http://eprints.esc.cam.ac.uk/2988/1/1-s2.0-S0012821X14000363-main.pdf http://eprints.esc.cam.ac.uk/2988/2/Dixit%201-s2.0-S0012821X14000363-gr001.jpg http://eprints.esc.cam.ac.uk/2988/3/mmc1.doc http://www.sciencedirect.com/science/article/pii/S0012821X14000363 https://doi.org/10.1016/j.epsl.2014.01.026 |
geographic |
Indian |
geographic_facet |
Indian |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
http://eprints.esc.cam.ac.uk/2988/1/1-s2.0-S0012821X14000363-main.pdf http://eprints.esc.cam.ac.uk/2988/2/Dixit%201-s2.0-S0012821X14000363-gr001.jpg http://eprints.esc.cam.ac.uk/2988/3/mmc1.doc Dixit, Yama and Hodell, David A. and Sinha, Rajiv and Petrie, Cameron A. (2014) Abrupt weakening of the Indian summer monsoon at 8.2 kyr B.P. Earth and Planetary Science Letters, 391. pp. 16-23. ISSN 0012-821X DOI https://doi.org/10.1016/j.epsl.2014.01.026 <https://doi.org/10.1016/j.epsl.2014.01.026> |
op_rights |
cc_by |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1016/j.epsl.2014.01.026 |
container_title |
Earth and Planetary Science Letters |
container_volume |
391 |
container_start_page |
16 |
op_container_end_page |
23 |
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1766121580698533888 |