Affiliation:
1. Nanjing University
2. School of Geography and Ocean Science, Nanjing University, Nanjing 210023
Abstract
Abstract
The cycle of precipitation change indicated by different proxy indicators are found to be inconsistent, which results in the “Chinese 100-kyr Problem”. The loess deposited in the past ~350 ka at the low latitude of East Asia is measured here. We find that the magnetic susceptibility varied at 100-kyr and 40-kyr cycles, can be interpreted as proxy for temperature. In contrast, the DCB-extractable iron varied at 50-kyr, 20-kyr and 10-kyr cycles, can be interpreted as proxy for precipitation. Our results indicate that the temperature and precipitation in the past ~350 ka at the low latitude of East Asia have varied at different cycles, and the change of East Asian summer monsoon indicated by the precipitation in this region is mainly forced by the insolation change due to a variation in the precession.
Publisher
Research Square Platform LLC
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