Spatial distribution of 10m firn temperature in the Antarctic Ice Sheet  

作　　者：WANG YeTang1,3 & HOU ShuGui2,3 1 Shandong Marine Fisheries Research Institute,Yantai 264006,China 2 MOE,Key Laboratory for Coast and Island Development,School of Geographic and Oceanographic Sciences,Nanjing University,Nanjing 210093,China 3State Key Laboratory of Cryospheric Science,Cold and Arid Regions Environmental and Engineering Research Institute,Chinese Academy of Sciences,Lanzhou 730000,China 

出　　处：《Science China Earth Sciences》2011年第5期655-666,共12页中国科学（地球科学英文版）

基　　金：supported by National Natural Science Foundation of China (Grant No. 40825017);Chinese Academy of Sciences (Grant No. SKLCSZZ-2008-06);National Key Technology R & D Program (Grant No. 2006BAB18B01)

摘　　要：A database of Antarctic 10 m firn temperature was constructed using available borehole temperature measurements with data quality control to extend knowledge of Antarctic climate. Slopes from a high-resolution digital elevation model and the main ice divide were used to delineate main drainage sectors across Antarctica. In each drainage sector, a quantitative relationship between temperature and latitude, longitude and altitude was established using available tim temperature data. Quantitative relationships incorporating other factors affecting Antarctic air temperature such as atmospheric circulation and small-scale to- pography were used to derive a 10-km resolution grid map of surface temperature. The resulting temperature patterns presented a reasonable depiction of both large and small-scale variations in Antarctic 10 m firn temperature. This map is useful for many spatial variation studies, Antarctic ice sheet models, and comparison with satellite-derived temperature data and outputs of atmospheric general circulation models.A database of Antarctic 10m firn temperature was constructed using available borehole temperature measurements with data quality control to extend knowledge of Antarctic climate.Slopes from a high-resolution digital elevation model and the main ice divide were used to delineate main drainage sectors across Antarctica.In each drainage sector,a quantitative relationship between temperature and latitude,longitude and altitude was established using available firn temperature data.Quantitative relationships incorporating other factors affecting Antarctic air temperature such as atmospheric circulation and small-scale topography were used to derive a 10-km resolution grid map of surface temperature.The resulting temperature patterns presented a reasonable depiction of both large and small-scale variations in Antarctic 10m firn temperature.This map is useful for many spatial variation studies,Antarctic ice sheet models,and comparison with satellite-derived temperature data and outputs of atmospheric general circulation models.

关 键 词：ANTARCTICA 10 m firn temperature spatial distribution 

分 类 号：P426.635[天文地球—大气科学及气象学]