Moisture increase in response to high-altitude warming evidenced by tree-rings on the southeastern Tibetan Plateau

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• 作者：Jinbao Li ; Jiangfeng Shi ; David D. Zhang ; Bao Yang ; Keyan Fang…
• 关键词：Dendrochronology ; High ; altitude warming ; Moisture change ; Tibetan Plateau
• 刊名：Climate Dynamics
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：48
• 期：1-2
• 页码：649-660
• 全文大小：
• 刊物类别：Earth and Environmental Science
• 刊物主题：Geophysics/Geodesy; Climatology; Oceanography;
• 出版者：Springer Berlin Heidelberg
• ISSN：1432-0894
• 卷排序：48

文摘

Rapid warming has been observed in the high-altitude areas around the globe, but the implications on moisture change are not fully understood. Here we use tree-rings to reveal common moisture change on the southeastern Tibetan Plateau (TP) during the past five centuries, and show that regional moisture change in late spring to early summer (April–June) is closely related to large-scale temperature anomaly over the TP, with increased moisture coincident with periods of high temperature. The most recent pluvial during the 1990s–2000s is likely the wettest for the past five centuries, which coincides with the warmest period on the TP during the past millennium. Dynamic analysis reveals that vertical air convection is enhanced in response to anomalous TP surface warming, leading to an increase in lower-tropospheric humidity and effective precipitation over the southeastern TP. The coherent warm-wet relationship identified in both tree-rings and dynamic analysis implies a generally wetter condition on the southeastern TP under future warming.