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Quaternary rainfall variability is governed by insolation in northern China and ice-sheet forcing in the South

Zhao, Debo ; Lu, Zhengyao LU ; Wan, Shiming ; Cheng, Hai ; Shi, Xuefa and Li, Anchun (2023) In Communications Earth and Environment 4(1).
Abstract

Quaternary Asian low-latitude hydroclimate cyclicity has long been attributed to insolation forcing, in contrast to the dominant ice-sheet and CO2 controls identified in mid-high-latitude regions. However, debates exist regarding these rainfall variations and forcings due to inconsistent reconstructions and simulations. Here, by combining rainfall proxy records with multi-model simulations, dominant 23 ka rainfall cycle in northern China and 100 ka rainfall cycle in southern China and Southeast Asia were found. We propose that rainfall mainly occurs in summer in the north, primarily driven by insolation. Rainfall in the south is largely forced by high-latitude ice sheets, with enhanced spring and autumn rainfall in southern... (More)

Quaternary Asian low-latitude hydroclimate cyclicity has long been attributed to insolation forcing, in contrast to the dominant ice-sheet and CO2 controls identified in mid-high-latitude regions. However, debates exist regarding these rainfall variations and forcings due to inconsistent reconstructions and simulations. Here, by combining rainfall proxy records with multi-model simulations, dominant 23 ka rainfall cycle in northern China and 100 ka rainfall cycle in southern China and Southeast Asia were found. We propose that rainfall mainly occurs in summer in the north, primarily driven by insolation. Rainfall in the south is largely forced by high-latitude ice sheets, with enhanced spring and autumn rainfall in southern China and weakened rainfall in western Maritime Continent during glacial periods. This study highlights the seasonal contributions to orbital-scale rainfall changes, and sheds light on the Asian hydroclimate conditions associated with high-low-latitude climate interactions.

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author
; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Communications Earth and Environment
volume
4
issue
1
article number
7
publisher
Springer Nature
external identifiers
  • scopus:85145548511
ISSN
2662-4435
DOI
10.1038/s43247-022-00670-9
language
English
LU publication?
yes
id
73cae837-2626-4f54-aafa-181ee7da2c76
date added to LUP
2023-01-23 12:48:38
date last changed
2023-01-23 12:48:38
@article{73cae837-2626-4f54-aafa-181ee7da2c76,
  abstract     = {{<p>Quaternary Asian low-latitude hydroclimate cyclicity has long been attributed to insolation forcing, in contrast to the dominant ice-sheet and CO<sub>2</sub> controls identified in mid-high-latitude regions. However, debates exist regarding these rainfall variations and forcings due to inconsistent reconstructions and simulations. Here, by combining rainfall proxy records with multi-model simulations, dominant 23 ka rainfall cycle in northern China and 100 ka rainfall cycle in southern China and Southeast Asia were found. We propose that rainfall mainly occurs in summer in the north, primarily driven by insolation. Rainfall in the south is largely forced by high-latitude ice sheets, with enhanced spring and autumn rainfall in southern China and weakened rainfall in western Maritime Continent during glacial periods. This study highlights the seasonal contributions to orbital-scale rainfall changes, and sheds light on the Asian hydroclimate conditions associated with high-low-latitude climate interactions.</p>}},
  author       = {{Zhao, Debo and Lu, Zhengyao and Wan, Shiming and Cheng, Hai and Shi, Xuefa and Li, Anchun}},
  issn         = {{2662-4435}},
  language     = {{eng}},
  number       = {{1}},
  publisher    = {{Springer Nature}},
  series       = {{Communications Earth and Environment}},
  title        = {{Quaternary rainfall variability is governed by insolation in northern China and ice-sheet forcing in the South}},
  url          = {{http://dx.doi.org/10.1038/s43247-022-00670-9}},
  doi          = {{10.1038/s43247-022-00670-9}},
  volume       = {{4}},
  year         = {{2023}},
}