Hydroclimatic anomalies in China during the post-Laki years and the role ofconcurring El Nino  

作　　者：GAO Chao-Chao YANG Lin-Shan LIU Fei 

机构地区：[1]Department of Environmental Science,Zhejiang University,Hangzhou,310058,China [2]Key Laboratory of Tropical Atmosphere‒Ocean System Ministry of Education,School of Atmospheric Sciences,Sun Yat-sen University,Zhuhai,519082,China [3]Southern Marine Science and Engineering Guangdong Laboratory,Zhuhai,519082,China

出　　处：《Advances in Climate Change Research》2021年第2期187-198,共12页气候变化研究进展（英文版）

基　　金：the National Natural ScienceFoundation of China(41875092);the National Key BasicResearch Program of China(2015CB953601).

摘　　要：Arctic is warming at an alarming speed causing accelerated melting of Greenland and rising of sea level,and geoengineering by injectingaerosol into stratosphere(SAI)has been proposed as a backup approach to mitigate warming.However,studies suggest that SAI implementationmay have adverse impacts on global especially monsoon precipitation,and Northern Hemisphere high-latitude injections may have dis-proportionally high effects than tropical injections.The 1783e1784 CE Laki eruption in Iceland provides an analogy to study the climatic andthe subsequent socioecological responses to Arctic SAI,and China possesses a rich legacy of documents recording climatic disasters anddescribing their direct impacts on agriculture and society.Using the most recent summer precipitation reconstructions and the documentary data,this study presents a systemic analysis of the hydroclimatic anomalies as well as the societal and ecological consequences in China following the1783e1784 CE Laki eruption.The results from multi-proxies show severe drought conditions in eastern China during the post-Laki years,accompanied by large scale locust breakout,famine and human pestilence.The drought and associated disasters first emerged in the North ChinaPlain in 1784 CE,intensified and expanded to the middle and lower reaches of the Yangtze River in 1785 CE.The drought and famine stresses inChina are part of the very unsettled climate conditions experienced across the Northern Hemispheric world during the 1780s.By isolating theENSO-induced precipitation from the reconstructed summer precipitation changes,our results indicate that the Laki eruption did cause severedrought in monsoon China during the next three years.The drought responses in the 1783e1784 were largely counter-balanced by the wettinginduced by the concurring strong El Ni~no event.The results help to enhance our understanding of the hydroclimate consequence of NH highlatitude volcanic eruption in China,and the potential role climate internal variation such as ENSO may play in modifying v

关 键 词：1783‒1784 CE Laki eruption Hydroclimatic anomalies China El Nino Proxy reconstruction 

分 类 号：P467[天文地球—大气科学及气象学]