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, CG, Leng, MJ, Jones, RT, Langdon, P.G. and Zhang, E (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, 132-137. (doi:10.1016/j.yqres.2011.09.011).

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Description/Abstract

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 overmillennial 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 fromca. 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: Article
ISSNs: 0033-5894 (print)
1096-0287 (electronic)
Subjects: G Geography. Anthropology. Recreation > GE Environmental Sciences
Divisions: Faculty of Social and Human Sciences > Geography and Environment > Palaeoenvironment Laboratory
ePrint ID: 343158
Date Deposited: 27 Sep 2012 14:03
Last Modified: 27 Mar 2014 20:25
URI: http://eprints.soton.ac.uk/id/eprint/343158

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