Recent temperature increase recorded in an ice core in the source region of Yangtze River

作     者：KANG ShiChang ZHANG YongJun QIN DaHe REN JiaWen ZHANG QiangGong Bjorn GRIGHOLM Paul A. MAYEWSKI 

作者机构：Institute of Tibetan Plateau Research Chinese Academy of Sciences Beijing 100085 China Key Laboratory of Cryosphere and Environment Chinese Academy of Sciences Lanzhou 730000 China Graduate University of Chinese Academy of Sciences Beijing 100049 China Climate Change Institute University of Maine Orono ME 04469 USA 

出 版 物：《Chinese Science Bulletin》 (中国科学通报)

年 卷 期：2007年第52卷第6期

页      面：825-831页

核心收录：

学科分类：07[理学] 070601[理学-气象学] 0705[理学-地理学] 0706[理学-大气科学] 070501[理学-自然地理学] 

基　　金：Supported by the National Natural Science Foundation of China (Grant Nos. 40401054 and 40121101) the National Basic Research Program of China (Grant No. 2005CB422004) the "Talent Project" and Innovation Project of Chinese Academy of Sciences (Grant Nos. KZCX3-SW-339 and 334) Dean Foundation of Chinese Academy of Sciences 

主　　题：长江源头地区 冰芯 青藏高原 温度升高 δ^18O记录 

摘      要：Interests on climate change in the source region of Yangtze River have been raised since it is a region with the greatest warming over the Tibetan Plateau (TP). A 70-year history of precipitation δ^(18)O has been recovered using an ice core record retrieved in a plat portion of the firn area in the Guoqu Glacier (33°34′37.8″N, 91°10′35.3″E, 5720 m a.s.l.), Mt. Geladaindong (the source region of Yangtze River), in November, 2005. By using a significant positive relationship between ice core δ^(18)O record and summer air temperature (July to September) from the nearby meteorological stations, a history of summer air temperature has been reconstructed for the last 70 years. Summer temperature was relatively low in 1940s and high in 1950s to the middle of 1960s. The lowest temperature occurred in the middle of 1970s. Temperature was low in 1980s and dramatically increased since 1990s, keeping the trend to the begin-ning of the 21st century. The warming rate recorded in the ice core with 0.5℃/10 a since 1970s is much higher that that in the central TP and the Northern Hemisphere (NH), and it becomes 1.1℃/10 a since 1990s which is also higher than these from the central TP and the NH, reflecting an accelerated warm-ing and a more sensitive response to global warming in the high elevation region.