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Lake ecosystem dynamics and links to climate change inferred from a stable isotope and organic palaeorecord from a mountain lake in southwestern China (ca. 22.6–10.5 cal ka BP)

Cook, Charlotte G.; Leng, Melanie J.; Jones, Richard T.; Langdon, Peter G.; Zhang, Enlou. 2012 Lake ecosystem dynamics and links to climate change inferred from a stable isotope and organic palaeorecord from a mountain lake in southwestern China (ca. 22.6–10.5 cal ka BP). Quaternary Research, 77 (1). 132-137. 10.1016/j.yqres.2011.09.011

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Abstract/Summary

A detailed understanding of long-term climatic and environmental change in southwestern China is hampered by a lack of long-term regional palaeorecords. Organic analysis (%TOC, %TN, C/N ratios and δ13C values) of a sediment sequence from Lake Shudu, Yunnan Province (ca. 22.6–10.5 cal ka BP) indicates generally low aquatic palaeoproductivity rates over millennial timescales in response to cold, dry climatic conditions. However, the record is punctuated by two marked phases of increased aquatic productivity from ca. 17.7 to 17.1 cal ka BP and from ca. 11.9 to 10.5 cal ka BP. We hypothesise that these shifts reflect a marked, stepwise lacustrine response to Asian summer monsoon strengthening during the last deglaciation.

Item Type: Publication - Article
Digital Object Identifier (DOI): 10.1016/j.yqres.2011.09.011
Programmes: BGS Programmes 2010 > NERC Isotope Geoscience Laboratory
ISSN: 0033-5894
Date made live: 12 Apr 2012 14:24
URI: http://nora.nerc.ac.uk/id/eprint/17682

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