Millennial-scale hydroclimate variations in southwest China linked to tropical Indian Ocean since the Last Glacial Maximum

Research Article| May 01, 2017 Millennial-scale hydroclimate variations in southwest China linked to tropical Indian Ocean since the Last Glacial Maximum Enlou Zhang; Enlou Zhang * 1State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China *E-mails: elzhang@niglas.ac.cn; czhao@niglas.ac.cn Search for other works by this author on: GSW Google Scholar Cheng Zhao; Cheng Zhao * 1State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China *E-mails: elzhang@niglas.ac.cn; czhao@niglas.ac.cn Search for other works by this author on: GSW Google Scholar Bin Xue; Bin Xue 1State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China Search for other works by this author on: GSW Google Scholar Zhonghui Liu; Zhonghui Liu 2Department of Earth Sciences, University of Hong Kong, Hong Kong, China Search for other works by this author on: GSW Google Scholar Zicheng Yu; Zicheng Yu 3Department of Earth and Environmental Sciences, Lehigh University, Bethlehem, Pennsylvania 18015, USA Search for other works by this author on: GSW Google Scholar Rong Chen; Rong Chen 1State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China Search for other works by this author on: GSW Google Scholar Ji Shen Ji Shen 1State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China Search for other works by this author on: GSW Google Scholar Author and Article Information Enlou Zhang * 1State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China Cheng Zhao * 1State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China Bin Xue 1State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China Zhonghui Liu 2Department of Earth Sciences, University of Hong Kong, Hong Kong, China Zicheng Yu 3Department of Earth and Environmental Sciences, Lehigh University, Bethlehem, Pennsylvania 18015, USA Rong Chen 1State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China Ji Shen 1State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China *E-mails: elzhang@niglas.ac.cn; czhao@niglas.ac.cn Publisher: Geological Society of America Received: 30 Jun 2016 Revision Received: 22 Jan 2017 Accepted: 30 Jan 2017 First Online: 28 Jun 2017 Online Issn: 1943-2682 Print Issn: 0091-7613 © 2017 Geological Society of America Geology (2017) 45 (5): 435–438. https://doi.org/10.1130/G38309.1 Article history Received: 30 Jun 2016 Revision Received: 22 Jan 2017 Accepted: 30 Jan 2017 First Online: 28 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Enlou Zhang, Cheng Zhao, Bin Xue, Zhonghui Liu, Zicheng Yu, Rong Chen, Ji Shen; Millennial-scale hydroclimate variations in southwest China linked to tropical Indian Ocean since the Last Glacial Maximum. Geology 2017;; 45 (5): 435–438. doi: https://doi.org/10.1130/G38309.1 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract Indian summer monsoon (ISM) variations have been linked to the orbital-scale boreal summer insolation and millennial-scale North Atlantic climates. Recent studies show the critical role of Indian Ocean sea-surface temperatures (SSTs) in affecting deglacial millennial-scale monsoon oscillations. However, it is unclear whether SSTs can affect monsoon rainfall and terrestrial hydroclimate during the Holocene. Here we report multiproxy evidence of hydroclimate changes in southwest China since the Last Glacial Maximum. Similar to the often-documented gradual decrease in Holocene monsoon rainfall with superimposed millennial-scale variations, our records particularly show pronounced hydroclimate fluctuations including wet conditions at ∼5000-4000 yr ago, and perhaps over the past 1000 yr. We also find coherent variations between our records and sea-surface salinities in the eastern Indian Ocean, suggesting that terrestrial hydroclimate and resultant continental drainage have affected surface ocean conditions. These fluctuations are likely linked to changes in SSTs downstream of the monsoon source in the tropical western Indian Ocean, i.e., a warmer ocean and more monsoon rainfall. We conclude that the influence of both insolation and tropical SSTs on the ISM has persisted from the last deglaciation into Holocene. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.