呼伦贝尔地区一次长时间极寒天气分析

利用MICAPS资料,对2011年1月10日-16日呼伦贝尔地区出现的长时间极寒天气过程进行综合分析.结果表明:此次过程极涡长时间稳定维持,不断分裂出冷空气南下,乌拉尔山高脊发展引导冷空气南下东移与贝加尔湖附近冷空气合并加强.此次过程低层冷平流较强,同时地面辐射降温进一步促使近地面温度下降,这对今后发生类似极寒天气过程具有一定的借鉴意义.

Using MICAPS data, this paper makes a comprehensive analysis of the long-term extremely cold weather process in Hulunbuir area from January 10 to 16, 2011. The results show that the polar vortex is stable for a long time, and the cold air continues to split southward, and the development of the high ridge of Ural Mountain leads the cold air to move southward and eastward and strengthen the combination of cold air near Lake Baikal. In this process, the low-level cold advection is strong, and the surface radiation cooling further promotes the decrease of near-surface temperature, which can be used for reference for the occurrence of similar extremely cold weather process in the future.