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利用中国第4~6次北极考察获得的北冰洋中心区(80°~88°N))GPS探空资料和NCEP再分析资料,分析了大气垂直结构、边界层参数的变化特征及其与海冰和温度变化的关系.结果表明,2010、2012和2014年夏季北冰洋中心区的对流层顶、边界层高度、逆温强度及风速和风向的垂直结构均存在明显差异.通过分析1979~2014年9月温度与海冰范围变化的关系,解释了其差异的原因.2012年9月北极海冰范围最小,减少了44%,具有明显的增温过程.2010年和2014海冰分别减少了22.6%和17%,出现的是降温过程.对比2种过程反映出海冰变化对大气边界层结构有重要影响.近30年北冰洋中心区(80°~90°N)1000和850hPa的温度变化呈显著的升温趋势,并与海冰范围呈显著的负相关.表明北极海冰的持续减少,会使地表至对流层中层持续增温.
Based on the GPS sounding data and NCEP reanalysis data from the Arctic center (80 ° ~ 88 ° N) obtained from the 4th to 6th Arctic expeditions in China), the variation characteristics of atmospheric vertical structure and boundary layer parameters and their relationship with sea ice The results show that the tropopause, the height of the boundary layer, the inverse temperature intensity and the vertical structure of the wind speed and wind direction are obviously different in the summer Arctic Ocean in 2010, The relationship between temperature and sea-ice extent changes explained the reasons for the differences: the Arctic sea ice range was the smallest in September 2012, a 44% decrease, with a clear warming process, and the sea ice in 2010 and 2014 decreased by 22.6% and 17%, and the process of cooling appears.Compared with the two processes, the change of sea ice has an important influence on the atmospheric boundary layer structure.The temperature changes at 1000 and 850 hPa in the central Arctic Ocean (80 ° -90 ° N) And negatively correlated with the range of sea ice, indicating that the continuous decrease of Arctic sea ice will cause the surface to continue warming in the middle troposphere.