Correlation and anti-correlation of the East Asian summer and winter monsoons during the last 21,000 years

Xinyu Wen (), Zhengyu Liu, Shaowu Wang, Jun Cheng and Jiang Zhu
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Xinyu Wen: School of Physics, Peking University
Zhengyu Liu: School of Physics, Peking University
Shaowu Wang: School of Physics, Peking University
Jun Cheng: Polar Climate System and Global Change Laboratory, Nanjing University of Information Science and Technology
Jiang Zhu: Nelson Institute for Environmental Studies, University of Wisconsin-Madison

Nature Communications, 2016, vol. 7, issue 1, 1-7

Abstract: Abstract Understanding the past significant changes of the East Asia Summer Monsoon (EASM) and Winter Monsoon (EAWM) is critical for improving the projections of future climate over East Asia. One key issue that has remained outstanding from the paleo-climatic records is whether the evolution of the EASM and EAWM are correlated. Here, using a set of long-term transient simulations of the climate evolution of the last 21,000 years, we show that the EASM and EAWM are positively correlated on the orbital timescale in response to the precessional forcing, but are anti-correlated on millennial timescales in response to North Atlantic melt water forcing. The relation between EASM and EAWM can differ dramatically for different timescales because of the different response mechanisms, highlighting the complex dynamics of the East Asian monsoon system and the challenges for future projection.

Date: 2016
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DOI: 10.1038/ncomms11999

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