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dc.contributor.authorLiu, Yu
dc.contributor.authorCai, Wenju
dc.contributor.authorSun, Changfeng
dc.contributor.authorSong, Huiming
dc.contributor.authorCobb, Kim M.
dc.contributor.authorLi, Jianping
dc.contributor.authorLeavitt, Steven W.
dc.contributor.authorWu, Lixin
dc.contributor.authorCai, Qiufang
dc.contributor.authorLiu, Ruoshi
dc.contributor.authorNg, Benjamin
dc.contributor.authorCherubini, Paolo
dc.contributor.authorBüntgen, Ulf
dc.contributor.authorSong, Yi
dc.contributor.authorWang, Guojian
dc.contributor.authorLei, Ying
dc.contributor.authorYan, Libin
dc.contributor.authorLi, Qiang
dc.contributor.authorMa, Yongyong
dc.contributor.authorFang, Congxi
dc.contributor.authorSun, Junyan
dc.contributor.authorLi, Xuxiang
dc.contributor.authorChen, Deliang
dc.contributor.authorLinderholm, Hans W.
dc.date.accessioned2019-07-24T17:17:01Z
dc.date.available2019-07-24T17:17:01Z
dc.date.issued2019-05-28
dc.identifier.citationLiu, Y., Cai, W., Sun, C., Song, H., Cobb, K. M., Li, J., ... & Ng, B. (2019). Anthropogenic aerosols cause recent pronounced weakening of Asian Summer Monsoon relative to last four centuries. Geophysical Research Letters, 46(10), 5469-5479.en_US
dc.identifier.issn0094-8276
dc.identifier.doi10.1029/2019gl082497
dc.identifier.urihttp://hdl.handle.net/10150/633483
dc.description.abstractThe 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. Plan Language Summary Monsoonal rainfall has a certain influence on agriculture and industry in the regions of Asian Summer Monsoon (ASM). An understanding of the spatial-temporal variability of the ASM and the associated dynamics is vital for terrestrial ecosystems, water resources, forests, and landscapes. We have developed a 448-year ASM reconstruction back to 1566 CE using 10 tree ring chronologies from the margin region of ASM. We find that historical severe droughts and locust plague disasters during weak ASM events. The recent decreasing ASM trend persisting for over 80 years is unprecedented over the past 448 years. Coupled climate models show that increasing anthropogenic aerosol emissions are the dominant underlying factor. Our aim is that the time series will find a wide range of utility for understanding past climate variability and for predicting future climate change.en_US
dc.description.sponsorshipNational Natural Science Foundation of China [41630531]; National Research Program for Key Issues in Air Pollution Control [DQGG0104]; Chinese Academy of Sciences [QYZDJ-SSW-DQC021, XDPB05, GJHZ1777]; Institute of Earth Environment, Chinese Academy of Sciences; State Key Laboratory of Loess and Quaternary Geologyen_US
dc.language.isoenen_US
dc.publisherAMER GEOPHYSICAL UNIONen_US
dc.rights©2019. American Geophysical Union. All Rights Reserved.en_US
dc.titleAnthropogenic Aerosols Cause Recent Pronounced Weakening of Asian Summer Monsoon Relative to Last Four Centuriesen_US
dc.typeArticleen_US
dc.identifier.eissn1944-8007
dc.contributor.departmentUniv Arizona, Lab Tree Ring Resen_US
dc.identifier.journalGEOPHYSICAL RESEARCH LETTERSen_US
dc.description.note6 month embargo; first published: 09 April 2019en_US
dc.description.collectioninformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.en_US
dc.eprint.versionFinal published versionen_US


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