Deep sea and lake records of the Southeast Asian paleomonsoons for the last 25 thousand years

Details Deep sea and lake records of the Southeast Asian paleomonsoons for the last 25 thousand years Deep sea and lake records of the Southeast Asian paleomonsoons for the last 25 thousand years

Jan 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997e%26psl.146...59h&link_type=abstract

Earth and Planetary Science Letters, Volume 146, Issue 1, p. 59-72.

Mathematics

Logic

17

Scientific paper

High resolution paleoceanographic proxy records from a deep-sea core in the northern South China Sea (SCS) and palynological records from a lake core in central Taiwan have been measured for the last 25 kyr. The variations in these proxy records are interpreted in terms of the past variation in the Asian monsoons. The two consistent and complementary records suggest that the East Asian monsoon system has fluctuated significantly from a strengthened winter monsoon during the last glaciation (25,000-12,000 yr BP) through a moderate to weak winter and summer monsoons during the deglaciation (12,000-10,000 yr BP) to an enhanced summer monsoon in the Holocene. Strengthening of the winter monsoon during the glacial is deduced from decreases in winter SST and increases in productivity indicators, such the abundances of alkenones and total organic carbon in the SCS. A stronger summer monsoon during the Holocene is inferred from the increases in floral productivity, the sedimentation rate of peat, the deposition of storm-related clay layers in the lake sediment, and the higher abundance of thermophyte Castanopsis. The 25 kyr paleomonsoon history registered in the SCS core and the Taiwan lake sediments is in agreement with the climatic records of the Chinese Loess plateau.

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