Abstract
The Asian Summer Monsoon (ASM) affects ecosystems, biodiversity, and food security of billions of people. In recent decades, ASM strength (as represented by precipitation) has been decreasing, but instrumental measurements span only a short period of time. The initiation and the dynamics of the recent trend are unclear. Here for the first time, we use an ensemble of 10 tree ring-width chronologies from the west-central margin of ASM to reconstruct detail of ASM variability back to 1566 CE. The reconstruction captures weak/strong ASM events and also reflects major locust plagues. Notably, we found an unprecedented 80-year trend of decreasing ASM strength within the context of the 448-year reconstruction, which is contrary to what is expected from greenhouse warming. Our coupled climate model shows that increasing anthropogenic sulfate aerosol emissions over the Northern Hemisphere could be the dominant factor contributing to the ASM decrease.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 5469-5479 |
| Number of pages | 11 |
| Journal | Geophysical Research Letters |
| Volume | 46 |
| Issue number | 10 |
| DOIs | |
| State | Published - May 28 2019 |
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Keywords
- anthropogenic aerosol
- Asian Summer Monsoon
- precipitation reconstruction
- tree ring chronology
ASJC Scopus subject areas
- Geophysics
- Earth and Planetary Sciences(all)
Cite this
Anthropogenic Aerosols Cause Recent Pronounced Weakening of Asian Summer Monsoon Relative to Last Four Centuries. / Liu, Yu; Cai, Wenju; Sun, Changfeng; Song, Huiming; Cobb, Kim M.; Li, Jianping; Leavitt, Steven; Wu, Lixin; Cai, Qiufang; Liu, Ruoshi; Ng, Benjamin; Cherubini, Paolo; Büntgen, Ulf; Song, Yi; Wang, Guojian; Lei, Ying; Yan, Libin; Li, Qiang; Ma, Yongyong; Fang, Congxi; Sun, Junyan; Li, Xuxiang; Chen, Deliang; Linderholm, Hans W.
In: Geophysical Research Letters, Vol. 46, No. 10, 28.05.2019, p. 5469-5479.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Anthropogenic Aerosols Cause Recent Pronounced Weakening of Asian Summer Monsoon Relative to Last Four Centuries
AU - Liu, Yu
AU - Cai, Wenju
AU - Sun, Changfeng
AU - Song, Huiming
AU - Cobb, Kim M.
AU - Li, Jianping
AU - Leavitt, Steven
AU - Wu, Lixin
AU - Cai, Qiufang
AU - Liu, Ruoshi
AU - Ng, Benjamin
AU - Cherubini, Paolo
AU - Büntgen, Ulf
AU - Song, Yi
AU - Wang, Guojian
AU - Lei, Ying
AU - Yan, Libin
AU - Li, Qiang
AU - Ma, Yongyong
AU - Fang, Congxi
AU - Sun, Junyan
AU - Li, Xuxiang
AU - Chen, Deliang
AU - Linderholm, Hans W.
PY - 2019/5/28
Y1 - 2019/5/28
N2 - The Asian Summer Monsoon (ASM) affects ecosystems, biodiversity, and food security of billions of people. In recent decades, ASM strength (as represented by precipitation) has been decreasing, but instrumental measurements span only a short period of time. The initiation and the dynamics of the recent trend are unclear. Here for the first time, we use an ensemble of 10 tree ring-width chronologies from the west-central margin of ASM to reconstruct detail of ASM variability back to 1566 CE. The reconstruction captures weak/strong ASM events and also reflects major locust plagues. Notably, we found an unprecedented 80-year trend of decreasing ASM strength within the context of the 448-year reconstruction, which is contrary to what is expected from greenhouse warming. Our coupled climate model shows that increasing anthropogenic sulfate aerosol emissions over the Northern Hemisphere could be the dominant factor contributing to the ASM decrease.
AB - The Asian Summer Monsoon (ASM) affects ecosystems, biodiversity, and food security of billions of people. In recent decades, ASM strength (as represented by precipitation) has been decreasing, but instrumental measurements span only a short period of time. The initiation and the dynamics of the recent trend are unclear. Here for the first time, we use an ensemble of 10 tree ring-width chronologies from the west-central margin of ASM to reconstruct detail of ASM variability back to 1566 CE. The reconstruction captures weak/strong ASM events and also reflects major locust plagues. Notably, we found an unprecedented 80-year trend of decreasing ASM strength within the context of the 448-year reconstruction, which is contrary to what is expected from greenhouse warming. Our coupled climate model shows that increasing anthropogenic sulfate aerosol emissions over the Northern Hemisphere could be the dominant factor contributing to the ASM decrease.
KW - anthropogenic aerosol
KW - Asian Summer Monsoon
KW - precipitation reconstruction
KW - tree ring chronology
UR - http://www.scopus.com/inward/record.url?scp=85067610397&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85067610397&partnerID=8YFLogxK
U2 - 10.1029/2019GL082497
DO - 10.1029/2019GL082497
M3 - Article
AN - SCOPUS:85067610397
VL - 46
SP - 5469
EP - 5479
JO - Geophysical Research Letters
JF - Geophysical Research Letters
SN - 0094-8276
IS - 10
ER -