Near surface climate of the traverse route from Zhongshan Station to Dome A, East Antarctica
Near surface climate of the traverse route from Zhongshan Station to Dome A, East Antarctica
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DOI：
10.1017/s0954102010000209
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发表时间：
2010-04
影响因子：
1.6
通讯作者：
Yongfeng Ma;L. Bian;C. Xiao;I. Allison;Xiuji Zhou
中科院分区：
文献类型：
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作者：
Yongfeng Ma;L. Bian;C. Xiao;I. Allison;Xiuji Zhou
摘要利用2005- 2007年南极中山站和3个自动气象站的资料，分析了南极东海岸至冰穹A冰帽的温度、气压、积雪、风的季节变化及其调和分析。结果表明：1）温度、积雪量和比湿随海拔和距海岸距离的增加而减小，积雪量从199 mm水当量（w.e.）yr-1在LGB 69（距离海岸180公里）至31毫米w.e.（2）A穹最低气温极低，为-82.5 ° C，月平均气温持续8个月低于-50 ° C，而中山站月平均气温不低于-20 ° C;（3）从海岸到悬崖区，平均地面风速增加，然后向内陆高原迅速减小，最强的风出现在具有最大表面坡度的下降地点，（4）气温和气压均表现出明显的两年振荡，春季为主极小值，秋季为次极小值，各站略有差异，冬季无核温度随海拔高度和距海岸距离的增加而增加，从中山站的0.260增加到Dome A站的0.433。
Abstract Seasonal variation of temperature, pressure, snow accumulation, winds, and their harmonic analysis are presented by using the data from Zhongshan Station and three Automatic Weather Stations deployed between the East Antarctic coast and the summit of the ice sheet at Dome A for the period 2005–07. Results show that: 1) temperature, snow accumulation and specific humidity decrease with increasing elevation and distance from the coast, with snow accumulation decreasing from 199 mm water equivalent (w.e.) yr-1 at LGB69 (180 km from the coast) to 31 mm w.e. yr-1 at Dome A, 2) Dome A experiences an extremely low minimum temperature of -82.5°C with the monthly mean temperature below -50°C for eight months in contrast to Zhongshan Station which does not show any monthly mean temperatures below -20°C, 3) mean surface wind speed increases from the coast to the escarpment region, and then reduces rapidly towards the interior plateau with the strongest winds occurring at katabatic sites with the greatest surface slopes, 4) temperature and pressure all shows a distinct biannual oscillation with a main minimum in spring and a secondary minimum in autumn, differing slightly from station to station, and 5) winter temperature corelessness increases as a function of elevation and distance from the coast, from 0.260 at the coastal Zhongshan Station to 0.433 at Dome A.