【摘要】 利用中国第28次南极内陆考察队在东南极冰盖最高点Dome A获取的2012年1月南极夏季20次珍贵的GPS探空资料,对该地区的大气垂直结构和边界层特征进行了研究。结果表明:南极高原对流层中部平均垂直温度递减率为5.2℃·km-1,低于全球平均对流层中部的递减率(6.5℃·km-1),递减率(LRT)对流层顶平均高度和平均温度分别为4.6 km和-51.3℃。水汽主要集中在距地2 km以下的对流层中。边界层中存在多层逆温结构,强逆温层出现在500 m以下高度,边界层平均高度为890 m,并具有早晩低、午间高的日变化特征。更多还原

【Abstract】 Based on the GPS radiosonde data obtained from the 28 thChinese Antarctic expedition during austral summer of 2012,the vertical structure of the troposphere and the boundary layer characteristics are analyzed. The results show that the average vertical temperature lapse rate of the Antarctic plateau middle troposphere is 5. 2℃·km-1,which is significantly lower than the global average middle tropospheric lapse rate(6. 5℃ ·km-1),the average height and temperature of lapse rate tropopause are 4. 6 km and-51. 3℃,respectively. The vapor exists mainly in the low er troposphere below 2 km. Multilayer inversion structure exists in the planetary boundary layer,strong inversion layer mainly exists below 500 m. The mean height of planetary boundary is 890 m,and it shows an obvious diurnal variation: low in the morning and high at noon. This study can provide ground truth value for validation and calibration of satellite data in inland Antarctic,and also lay an important foundation for the verification of the results get from the atmospheric general circulation model.更多还原