Regional drought shifts (1710–2010) in East Central Asia and linkages with atmospheric circulation recorded in tree-ring δ18O
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Final Accepted Manuscript
Author
Xu, GuobaoLiu, Xiaohong
Trouet, Valerie
Treydte, Kerstin
Wu, Guoju
Chen, Tuo
Sun, Weizhen
An, Wenling
Wang, Wenzhi
Zeng, Xiaomin
Qin, Dahe
Affiliation
Univ Arizona, Lab Tree Ring ResIssue Date
2019-01
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SPRINGERCitation
Xu, G., Liu, X., Trouet, V. et al. Clim Dyn (2019) 52: 713. https://doi.org/10.1007/s00382-018-4215-2Journal
CLIMATE DYNAMICSRights
© Springer-Verlag GmbH Germany, part of Springer Nature 2018.Collection Information
This 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.Abstract
Drought occurrence and duration in central Asia are of important socioeconomic, ecological, and geophysical significance and have received increasing research attention in recent years. Understanding long-term drought trends and their driving forces require reliable records of past drought variability with broad spatial representativeness. Here, we compiled four tree-ring O-18 records from eastern central Asia (ECA) and composited them into a drought-sensitive proxy to explore regional ECA moisture variations over the past 301years (1710-2010 CE). A robust regional standardized precipitation-evapotranspiration index (SPEI) reconstruction was established based on the tree-ring cellulose O-18 fractionation mechanism and statistically significant proxy-climate relationships. We identified prominent droughts in 1710-1770, 1810-1830, and the beginning of the twenty-first century, and a regime shift to a persistently wet period from the 1880s to 2000. Our reconstruction reveals the impact of drought and pluvial patterns on the decline of Zhungar Empire, and on historical agricultural and socio-economical activities, including increased migration into ECA during the 1770-1800 pluvial. Our findings also suggest that wet conditions in the twentieth century in ECA were related to a strengthening of the westerly circulation and thus shed light on large-scale atmospheric circulation dynamics in central Asia.Note
12 month embargo; published online: 21 April 2018ISSN
0930-75751432-0894
Version
Final accepted manuscriptSponsors
National Natural Science Foundation of China [41501049, 41571196, 41421061]; Self-determination Project of the State Key Laboratory of Cryospheric Sciences [SKLCS-ZZ-2017]; foundation of Light of West China Program of Chinese Academy of Sciences (CAS); fundamental Research funds for the Central Universities [GK201801007]; China Desert Meteorological Science Research Foundation [Sqj2014002]; open foundation of the State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, CAS [SKLLQG1424]; Youth Innovation Promotion Association, CAS; National Science Foundation [AGS-1349942]Additional Links
http://link.springer.com/10.1007/s00382-018-4215-2ae974a485f413a2113503eed53cd6c53
10.1007/s00382-018-4215-2