We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Deglacial variability of South China hydroclimate heavily contributed by autumn rainfall.
- Authors
He, Chengfei; Liu, Zhengyu; Otto-Bliesner, Bette L.; Brady, Esther C.; Zhu, Chenyu; Tomas, Robert; Gu, Sifan; Han, Jing; Jin, Yishuai
- Abstract
The deglacial hydroclimate in South China remains a long-standing topic of debate due to the lack of reliable moisture proxies and inconsistent model simulations. A recent hydroclimate proxy suggests that South China became wet in cold stadials during the last deglaciation, with the intensification proposed to be contributed mostly by the East Asian summer monsoon (EASM). Here, based on a deglacial simulation in a state-of-the-art climate model that well reproduces the evolution of EASM, winter monsoon (EAWM) and the associated water isotopes in East Asia, we propose that the intensified hydroclimate in South China is also contributed heavily by the rainfall in autumn, during the transition between EASM and EAWM. The excessive rainfall in autumn results from the convergence between anomalous northerly wind due to amplified land-sea thermal contrast and anomalous southerly wind associated with the anticyclone over Western North Pacific, both of which are, in turn, forced by the slowdown of the Atlantic thermohaline circulation. Regardless the rainfall change, however, the modeled δ18Op remains largely unchanged in autumn. Our results provide new insights to East Asia monsoon associated with climate change in the North Atlantic. Deglacial hydroclimate in South China is perennially debated. New modeling experiments reveal that regional hydroclimate was strongly influenced by rainfall during the transition between the East Asian summer monsoon and winter monsoon, forced by climate variability in the North Atlantic.
- Subjects
CHINA; EAST Asia; MONSOONS; MERIDIONAL overturning circulation; ATMOSPHERIC models; CLIMATE change; GLACIAL melting
- Publication
Nature Communications, 2021, Vol 12, Issue 1, p1
- ISSN
2041-1723
- Publication type
Article
- DOI
10.1038/s41467-021-26106-0