A pollen record for the last 15.8 kyr from Qinghai Crater Lake in western Yunnan Province, southwestern China shows five major stages of vegetation development.
The reconstruction indicate the climatic was slightly cold and dry from 15.8 to 12.8 cal kyr BP, and a warm and rather humid climate occurred at the period of 8.3–4.6 cal kyr BP.
The warm and moist climate between 8.3 and 4.6 cal kyr BP may response to the high sea surface temperatures and high sea levels in the Bay of Bengal at that time.