Institution: | Center for Arid Environment and Paleoclimate Research (CAEP), Key Laboratory of West China’s Environmental System (Ministry of Education), Lanzhou University, Lanzhou, China Lamont–Doherty Earth Observatory Tree ring Laboratory, Columbia University, Lanzhou, China State Key Laboratory of Cryospheric Sciences, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou, China Department of Geography and Center for Climatic Research, University of Delaware, Newark, DE, USA
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