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Extreme monsoon aridity episodes recorded in South China during Heinrich Events
Nanjing Univ, Sch Geog & Oceanog Sci, Nanjing 210023, Jiangsu, Peoples R China..
Nanjing Univ, Sch Geog & Oceanog Sci, Nanjing 210023, Jiangsu, Peoples R China..
Nanjing Univ, Sch Geog & Oceanog Sci, Nanjing 210023, Jiangsu, Peoples R China..
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, LUVAL.
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2015 (English)In: Palaeogeography, Palaeoclimatology, Palaeoecology, ISSN 0031-0182, E-ISSN 1872-616X, Vol. 440, 467-474 p.Article in journal (Refereed) Published
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Abstract [en]

Geological records of climate change since the last glaciation in South China, a core area of the East Asian monsoon, are key to understanding secular variation in the monsoon system. However, with the exception of the speleothems, records from this area with independent age control are few. We investigated aeolian sand deposition on a sand hill on the shore of Poyang Lake in South China and reconstructed the chronological sequence of aeolian deposition using Optically Stimulated Luminescence (OSL) dating. Without exception, all aeolian sediments were deposited within seven periods that generally match the timing of Heinrich events and other cold periods in Greenland. We argue that aeolian sand accumulation in this region is most likely forced by extreme aridity driven by weakening of the summer monsoon, while the characteristics of this deposition are influenced by winter monsoon intensity. The monsoon shifts revealed here suggest a possible link between North Atlantic cooling and summer monsoon strength in South China, and support the intensities of cooling phases recorded in Greenland ice cores.

Place, publisher, year, edition, pages
2015. Vol. 440, 467-474 p.
Keyword [en]
Heinrich events, Sand hill, OSL dating, Aridity, East Asian monsoon
National Category
Geosciences, Multidisciplinary
Identifiers
URN: urn:nbn:se:uu:diva-274939DOI: 10.1016/j.palaeo.2015.09.037ISI: 000366539700036OAI: oai:DiVA.org:uu-274939DiVA: diva2:897858
Available from: 2016-01-26 Created: 2016-01-26 Last updated: 2017-11-30Bibliographically approved

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Stevens, Thomas

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