Decreasing trend of temperature in Princess Elizabeth Land, Antarctica in the past 150 years  

作　　者：ZHANG Mingjun1] LI Zhongqin1] XIAO Cunde1] REN Jiawen1] QIN Dahe1] KANG Jiancheng1] LI Jun1] 

机构地区：[1]State Key Laboratory of Frozen Soil Engineering,Cold and Arid Regions Environmental and Engineering Research Institute,Chinese Academy of Sciences,Lanzhou 730000,China [2]Cold and Arid Regions Environmental and Engineering Research Institute,Chinese Academy of Sciences,Lanzhou 730000,China [3]Chinese Institute of Polar Research,Shanghai 200129,China [4]Antarctic Cooperation Research Center and Australian Antarctic Division,Hobart 7001,Australia

出　　处：《Chinese Science Bulletin》2002年第17期1474-1478,共5页

基　　金：This work was supported by the Chinese Academy of Sciences (Grant No. KZCX2-303);the Ministry of Science and Technology of China (Grant No.2001CB711003);the National Natural Science Foundation of China (Grant No. 49971021).

摘　　要：A 50-m firn core drilled in Princess Elizabeth Land, Antarctica, during the 1996/1997 Chinese First Antarctic Inland Expedition, has been measured for δ18O and major ions. Based on the high quality of the seasonal variations of major ions, the firn core was dated with errors within ±3 years. The features of the temperature change in the past 150 years in the investigated region have first been studied based on the oxygen isotope in the upper 32.93 m of the firn core. Results show that the temperature decreased nearly by 2°C in Princess Elizabeth Land in the past 150 years. On the background of the global, especially the Southern Hemispheric warming in the past 150 years, a temperature decline of 2°C in Princess Elizabeth Land likely reflects the impacts of the unique Southern Hemisphere atmospheric circulation, the Antarctic Circumpolar Wave (ACW) and the special terrain (such as the large drainage basins) on the coastal regions of Antarctica.A 50-m firn core drilled in Princess Elizabeth Land, Antarctica, during the 1996/1997 Chinese First Antarctic Inland Expedition, has been measured for δ18O and major ions. Based on the high quality of the seasonal variations of major ions, the firn core was dated with errors within ±3 years. The features of the temperature change in the past 150 years in the investigated region have first been studied based on the oxygen isotope in the upper 32.93 m of the firn core. Results show that the temperature decreased nearly by 2℃ in Princess Elizabeth Land in the past 150 years. On the background of the global, especially the Southern Hemispheric warming in the past 150 years, a temperature decline of 2℃ in Princess Elizabeth Land likely reflects the impacts of the unique Southern Hemisphere atmospheric circulation, the Antarctic Circumpolar Wave (ACW) and the special terrain (such as the large drainage basins) on the coastal regions of Antarctica.

关 键 词：ANTARCTICA FIRN core DECLINE of temperature. 

分 类 号：P532[天文地球—古生物学与地层学]