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dc.contributor.authorShi, Feng
dc.contributor.authorLi, Jianping
dc.contributor.authorWilson, Rob J. S.
dc.identifier.citationShi , F , Li , J & Wilson , R J S 2014 , ' A tree-ring reconstruction of the South Asian summer monsoon index over the past millennium ' Scientific Reports , vol. 4 , 6739 . DOI: 10.1038/srep06739en
dc.identifier.otherPURE: 157934511
dc.identifier.otherPURE UUID: ed22b677-0304-4cfa-b185-4aaf901fb607
dc.identifier.otherWOS: 000343597300010
dc.identifier.otherScopus: 84919782897
dc.descriptionThis study was jointly funded by the 973 Program (2010CB950400) and the National Natural Science Foundation of China (41301220; 41030961). Feng Shi was supported by the China Postdoctoral Science Foundation, China Meteorological Administration, with funding specifically targeted for Drought Research (IAM201213) and the West Light Program for Talent Cultivation of the Chinese Academy of Sciences.en
dc.description.abstractThe South Asian summer monsoon (SASM) is a major atmospheric synoptic climate system affecting nearly a quarter of the human population. Climate proxy data derived from tree rings, ice cores, speleothems, and other sources can all contribute to an understanding of SASM variability prior to instrumental period. Here, we develop an optimal information extraction (OIE) method, which we use to reconstruct the SASM index (SASMI) over the last millennium using 15 tree-ring chronologies. The record generated is significantly correlated (r = 0.7, p < 0.01) with the instrumental SASMI record on annual timescales; this correlation is higher than that obtained in any previous study. The reconstructed SASMI captures 18 of 26 (69%) reordered historical famine events in India over the last millennium; notably, 11 of 16 short events with durations of 1–3 years are accurately depicted in our reconstruction. Moreover, the reconstructed SASMI is positively correlated with variations in total solar irradiance (TSI) on multi-decadal timescales implying that variations in solar activity may influence the SASM. Based on the response of SASM to 34 significant volcanic events using the superposed epoch analysis, the volcanic forcing may drive a weak SASM in the second year of an eruption.en
dc.relation.ispartofScientific Reportsen
dc.rightsCopyright authors 2014. This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder in order to reproduce the material. To view a copy of this license, visit
dc.subjectLast millenniumen
dc.subjectIndian monsoonen
dc.subjectG Geography (General)en
dc.subjectGE Environmental Sciencesen
dc.titleA tree-ring reconstruction of the South Asian summer monsoon index over the past millenniumen
dc.typeJournal articleen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews. Earth and Environmental Sciencesen
dc.contributor.institutionUniversity of St Andrews. Scottish Oceans Instituteen
dc.contributor.institutionUniversity of St Andrews. St Andrews Sustainability Instituteen
dc.description.statusPeer revieweden

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