文献类型：期刊文献

中文题名：2020年12月底至2021年1月初两次寒潮过程的对比分析

英文题名：Comparative Analysis of Two Cold Wave Processes from the Last 2020 to Early 2021

作者：施晴天[1];薛宇峰[1];何淋彬[1];彭玮怡[1]

机构：[1]广东海洋大学海洋与气象学院,广东湛江524088

年份：2021

卷号：11

期号：5

起止页码：131

中文期刊名：农业灾害研究

外文期刊名：Journal of Agricultural Catastrophology

基金：国家重点研发计划项目(2018YFC1506902);广东海洋大学2019年度教学质量工程项目“大气科学教学团队”(570219040)。

语种：中文

中文关键词：寒潮;极端低温;锋前增温;锋前冷平流

外文关键词：Cold wave;Extreme low temperature;Pre frontal warming;Frontal cold advection

中文摘要：利用ECMWF再分析资料和GPM降水资料对2020年12月28-31日和2021年1月6-8日影响中国的两次寒潮天气过程进行诊断分析,结果表明:两次寒潮都经历了极涡南下、横槽转竖、冷高压异常强大、地面冷锋快速南压的过程,均导致全国大范围地区降温和出现极端低温天气。但前一次寒潮过程中冷锋南下前有明显的锋前增温,而后一次冷锋南下过程出现了锋前冷平流,导致后一次寒潮过程造成的极端低温比前一次过程更低。

外文摘要：Based on ECMWF reanalysis data and GPM precipitation data,two cold wave weather processes affecting China on December 28-31,2021 and January 6-8,2021 were diagnosed and analyzed.The results show that the two cold waves experienced the process of polar vortex southward,transverse trough vertical,abnormal strong cold high and rapid southward pressure of ground cold front,resulting in large-scale regional cooling and extreme low temperature.However,in the former cold wave process,there was obvious warming before the cold front moved southward,and in the latter cold front moved southward,there was cold advection before the cold front,which caused the extreme low temperature of the latter cold wave process to be much lower than that of the former.