gchange  > 气候变化事实与影响
Scopus ID: 2-s2.0-85045747818
Regional drought shifts (1710–2010) in East Central Asia and linkages with atmospheric circulation recorded in tree-ring δ 18 O
Author: Xu G.; Liu X.; Trouet V.; Treydte K.; Wu G.; Chen T.; Sun W.; An W.; Wang W.; Zeng X.; Qin D.
Source Publication: Climate Dynamics
ISSN: 9307575
Indexed By: SCI ; SCI-E
Publishing Year: 2019
Volume: 52, Issue:2019-01-02
pages begin: 713
pages end: 727
Language: 英语
Keyword: Drought reconstruction ; Eastern Central Asia ; SPEI ; Stable oxygen isotopes ; Tree rings
English 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 δ 18 O records from eastern central Asia (ECA) and composited them into a drought-sensitive proxy to explore regional ECA moisture variations over the past 301 years (1710–2010 CE). A robust regional standardized precipitation-evapotranspiration index (SPEI) reconstruction was established based on the tree-ring cellulose δ 18 O 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. © 2018, Springer-Verlag GmbH Germany, part of Springer Nature.
Document Type: 期刊论文
Appears in Collections:气候变化事实与影响

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Affiliation: State Key Laboratory of Cryospheric Sciences, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, 730000, China; State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi’an, 710075, China; Key Laboratory of Tree-ring Physical and Chemical Research of China Meteorological Administration, Urumqi, 830002, China; School of Geography and Tourism, Shaanxi Normal University, Xi’an, Shannxi 710119, China; Laboratory of Tree-Ring Research, University of Arizona, Tucson, 85721, United States; Dendrosciences Group, Swiss Federal Research Institute WSL, Zürcherstrasse 111, Birmensdorf, 8903, Switzerland

Recommended Citation:
Xu G.,Liu X.,Trouet V.,et al. Regional drought shifts (1710–2010) in East Central Asia and linkages with atmospheric circulation recorded in tree-ring δ 18 O[J]. Climate Dynamics,2019-01-01,52(2019-01-02)
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