马兰冰芯记录的青藏高原中部现代升温变化特征  

Characteristic of Present Warming Change Recorded in Malan Ice Core,Central Tibetan Plateau

作　　者：王有清[1] 蒲健辰[1] 张永亮[1] 孙维贞[1] 

机构地区：[1]中国科学院寒区旱区环境与工程研究所冰芯与寒区环境重点实验室,甘肃兰州730000

出　　处：《冰川冻土》2003年第2期130-134,共5页Journal of Glaciology and Geocryology

基　　金：中国科学院知识创新工程重大项目 (KZCX1 10 0 6;KZCX2 3 0 1) ;国家自然科学基金创新群体项目;自然科学基金重点项目(90 10 2 0 0 5 ) ;基础研究重大项目前期研究专项 (慕士塔格冰芯记录;冰川变化与冰川水资源研究 )资助

摘　　要：根据从可可西里地区马兰冰帽钻取的深 10 2 .0 7m冰芯记录中δ18O的年变化 ,恢复了青藏高原中部 2 0世纪 2 0年代以来的气候变化 .研究表明 ,青藏高原中部的升温变化与北半球 2 0世纪的升温变化的总体趋势一致 ,最暖阶段出现在 5 0— 80年代早期 .期间也出现了几次明显的冷的波动 ,尤其 80年代后期至 90年代持续低温 ,可能与这一时段强盛的夏季风有关 .这也表明 2 0世纪末全球急剧升温变化的过程中 ,某些地区存在气候变冷的波动事件 .Climate change since the 1920s was rec onstructed based on annual δ 18 O from a 102.07 m ice core recovered from the Malan Ice Cap in Hoh Xil region in the central Tibetan Plateau in May 1999. The Malan ice core shows that warming trend during the 20th in central Tibetan Plateau is similar to the warming of the Northern Hemisphere. The warmest period recorded by the core was during the 1950s to the early 1980s. There are also several colder stable periods punctuated through the warming, especially, the climate during the late 1980s to 1990s was colder, maybe caused by the strong summer monsoon. The record also suggests that there were some short terms with cooling fluctuation, which might appear in some regions during the rapid global warming in the latest 20th century.

关 键 词：可可西里地区 冰帽 青藏高原 冰芯记录 气候变化 

分 类 号：P343.6[天文地球—水文科学] P467[天文地球—地球物理学]