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近60年中国冷空气过程气候变率分析
朱万林1,2, 李清泉1,2, 王遵娅3, 沈新勇4
(1.南京信息工程大学气象灾害教育部重点实验室/气候与环境变化国际合作联合实验室/气象灾害预报预警与评估协同创新中心国家气候中心;2.中国气象局气候研究开放实验室;3.国家气候中心;4.南京信息工程大学、南方海洋科学与工程广东省实验室)
Climatological Variability of Cold Air Processes over China in Recent 60 Years
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投稿时间:2020-10-28    修订日期:2021-01-04
中文摘要: 使用1960-2019年中国2400个气象站逐日观测气温,系统地分析了中国各类冷空气过程的气候学特征,探讨了寒潮、冷空气过程与北极涛动(AO)的关系。结果表明:中国的寒潮和冷空气过程主要发生在秋季和冬季,频数和强度有明显的月际和季节差异,区域型寒潮在秋季发生频数最多,全国型寒潮、区域型冷空气和全国型冷空气在冬季发生频数最多;区域型冷空气总体过程(寒潮与冷空气过程之和)平均强度在2月最大,全国型冷空气总体过程平均强度在11月最大。近60年中国冬季气温可以分为两个时期,即冷期(1960-1986年)和冷期(1987-2019年)。在冷期,冬季全国型寒潮频数呈显著减少趋势(-0.57次/10年),区域型冷空气、全部型(全国型与区域型之和)冷空气过程频数呈显著上升趋势(分别为1.37 次/10年、1.28次/10年);在暖期,1月全国型寒潮频数呈显著下降趋势(-0.17次/10年),而区域型冷空气频数呈显著上升趋势(0.53次/10年)。中国寒潮和冷空气过程的频数和强度与AO密切相关。在年际尺度上,各个季节各类寒潮频数(强度)与AO指数为负相关,冬季各类冷空气频数(强度)与AO指数为正相关;在年代际尺度上,冬季区域型寒潮频数、全国型寒潮频数、全国型寒潮强度与AO指数均为显著正相关。
中文关键词: 冷空气  寒潮  强度  频数  北极涛动
Abstract:By virtue of the daily temperature observations of 2400 stations in China from 1960 to 2019, the climatological characteristics of the cold event in China are systematically analyzed, and the relationship between cold wave, cold air process and the Arctic Oscillation (AO) is discussed. The results show that the cold wave and cold air process in China mainly occur in autumn, winter and spring, and the frequency and intensity have obvious monthly and seasonal differences. Regional cold wave has the highest frequency in autumn, and national cold wave and all types of cold air have the highest frequency in winter. The average intensity of regional cold event is the largest in February, and the average intensity of national cold event is the largest in November. Based on the analysis of winter temperature in China, the past 60 years can be divided into two stages, that is, the cold period from 1960 to 1986 and the warm period from 1987 to 2019. In the winter of cold period, the frequency of the national cold wave shows a significant decrease trend (-0.57 times/10 years), and the frequency of regional cold air and all-type (the sum of national type and regional type) cold air processes in winter shows a significant upward trend of 1.37 times/10 years and 1.28 times/10 years, respectively. In the warm period, there is a significantly decreasing trend of national cold wave frequency (-0.17 times/10 years) and a significantly increasing trend of regional cold air frequency (0.53 times/10 years) in January. The frequency and intensity of cold wave and cold air over China are closely related to the Arctic Oscillation (AO). On the interannual scale, the frequency (intensity) of various cold wave in various seasons is negatively correlated with the AO index, but the frequency (intensity) of various cold air in winter is positively correlated with AO index. On the interdecadal scale, the frequency of winter regional cold wave, the frequency of national cold wave, and the intensity of national cold wave are significantly positively correlated with the AO index.
文章编号:202010280375     中图分类号:    文献标志码:
基金项目:中国科学院知识创新项目,国家自然科学基金项目(面上项目,重点项目,重大项目)
引用文本:
朱万林,李清泉,王遵娅,沈新勇,0.Climatological Variability of Cold Air Processes over China in Recent 60 Years[J].Meteor Mon,():-.
zhuwanlin,liqingquan,wangzunya,shenxinyong,0.Climatological Variability of Cold Air Processes over China in Recent 60 Years[J].Meteor Mon,():-.