Southern Hemisphere forcing of South Asian monsoon precipitation over the past ~1 million years

dc.contributor.author Gebregiorgis, Daniel
dc.contributor.author Hathorne, Ed C.
dc.contributor.author Giosan, Liviu
dc.contributor.author Clemens, Steven C.
dc.contributor.author Nürnberg, Dirk
dc.contributor.author Frank, Martin
dc.date.accessioned 2018-11-13T18:48:07Z
dc.date.available 2018-11-13T18:48:07Z
dc.date.issued 2018-11-08
dc.description © The Author(s), 2018. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Nature Communications 9 (2018): 4702, doi:10.1038/s41467-018-07076-2. en_US
dc.description.abstract The orbital-scale timing of South Asian monsoon (SAM) precipitation is poorly understood. Here we present new SST and seawater δ18O (δ18Osw) records from the Bay of Bengal, the core convective region of the South Asian monsoon, over the past 1 million years. Our records reveal that SAM precipitation peaked in the precession band ~9 kyrs after Northern Hemisphere summer insolation maxima, in phase with records of SAM winds in the Arabian Sea and eastern Indian Ocean. Precession-band variance, however, accounts for ~30% of the total variance of SAM precipitation while it was either absent or dominant in records of the East Asian monsoon (EAM). This and the observation that SAM precipitation was phase locked with obliquity minima and was sensitive to Southern Hemisphere warming provides clear evidence that SAM and EAM precipitation responded differently to orbital forcing and highlights the importance of internal processes forcing monsoon variability. en_US
dc.description.sponsorship This study was partly funded by the German Science Foundation, DFG, IODP Priority Program (grant HA 5751/3-1). en_US
dc.identifier.citation Nature Communications 9 (2018): 4702 en_US
dc.identifier.doi 10.1038/s41467-018-07076-2
dc.identifier.uri https://hdl.handle.net/1912/10706
dc.language.iso en_US en_US
dc.publisher Nature Publishing Group en_US
dc.relation.uri https://doi.org/10.1038/s41467-018-07076-2
dc.rights Attribution 4.0 International *
dc.rights.uri http://creativecommons.org/licenses/by/4.0/ *
dc.title Southern Hemisphere forcing of South Asian monsoon precipitation over the past ~1 million years en_US
dc.type Article en_US
dspace.entity.type Publication
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