Strong link between large tropical volcanic eruptions and severe droughts prior to monsoon in the central Himalayas revealed by tree-ring records

作     者：Eryuan Liang Binod Dawadi Neil Pederson Shilong Piao Haifeng Zhu Shalik Ram Sigdel Deliang Chen 

作者机构：Key Laboratory of Alpine Ecology Institute of Tibetan Plateau Research Chinese Academy of Sciences Beijing 100101 China Center for Excellence in Tibetan Plateau Earth Sciences Chinese Academy of Sciences Beijing 100101 China Central Department of Hydrology and Meteorology Tribhuvan University Kathmandu Nepal Harvard Forest Harvard University Petersham MA 01366 USA College of Urban and Environmental Sciences Peking University Beijing 100871 China Key Laboratory of Tibetan Environment Changes and Land Surface Processes Institute of Tibetan Plateau Research Chinese Academy of Sciences Beijing 100101 China Regional Climate Group Department of Earth Sciences University of Gothenburg Gothenburg 40530 Sweden 

出 版 物：《Science Bulletin》 (科学通报（英文版）)

年 卷 期：2019年第64卷第14期

页      面：1018-1023页

核心收录：

学科分类：07[理学] 08[工学] 

基　　金：supported by the National Natural Science Foundation of China (41661144040) the Strategic Priority Research Program of Chinese Academy of Sciences (XDA20050101, XDA2006040103) Youth Innovation Promotion Association of Chinese Academy of Sciences, and the Open Research Fund of Key Laboratory of Tibetan Environmental Changes and Land Surface Processes, Chinese Academy of Sciences supported by the Chinese Academy of Sciences President’s International Fellowship Initiative (2018PC0040) 

主　　题：Tree ring Drought Tropical volcanic eruptions Central Himalayas 

摘      要：Large tropical volcanic eruptions can cause short-term global cooling. However, little is known whether large tropical volcanic eruptions, like the one in Tambora/Indonesia in 1815, cause regional hydroclimatic anomalies. Using a tree-ring network of precisely dated Himalayan birch in the central Himalayas, we reconstructed variations in the regional pre-monsoon precipitation back to 1650 CE. A superposed epoch analysis indicates that the pre-monsoon regional droughts are associated with large tropical volcanic eruptions, appearing to have a strong influence on hydroclimatic conditions in the central Himalayas. In fact, the most severe drought since 1650 CE occurred after the Tambora eruption. These results suggest that dry conditions prior to monsoon in the central Himalayas were associated with explosive tropical volcanism. Prolonged La Ni?a events also correspond with persistent pre-monsoon droughts in the central Himalayas. Our results provide evidence that large tropical volcanic eruptions most likely induced severe droughts prior to monsoon in the central Himalayas.