2015年红原地区首次寒潮天气过程分析

Analysis on the Process of First Cold Wave in Hongyuan Region in 2015

基于2015年1月4—6日500 h Pa高空温度场和高空高度场数据,对2015年红原地区首次寒潮天气的环流形势进行了分析。结果表明,此次寒潮天气过程,是我国西北地区及西西伯利亚一带强冷空气在高空西北气流的引导下,一路向东南一带蔓延,且这一带高空槽往东南发展移动,并且有强盛的冷平流,红原地区均受强盛冷平流的影响是造成此次气温骤降的主要原因。

Circulation situation of first cold wave in Hongyuan region in 2015 was analyzed on the base of the data of altitude temperature field and altitude height field at 500 h Pa from January 4 to January 6 in 2015. Results showed that the cold wave spread to the southeast area affected by the air stream in northwest China and West Siberia, the pressure ridge moved to southeast and the strong cold advection occurred. Strong cold advection was the main reason causing the temperature dips in Hongyuan region.