Journal of Arid Meteorology ›› 2022, Vol. 40 ›› Issue (1): 41-48.DOI: 10.11755/j.issn.1006-7639(2022)-01-0041

• Articles • Previous Articles     Next Articles

Characteristics of cold wave activities in Beijing-Tianjin-Hebei region from 1961 to 2017

LI Hongying1(), LIN Shu2(), WANG Yunpeng1, HUANG Pengcheng2, YU Yanan1   

  1. 1. Jiuquan Meteorological Bureau of Gansu Province,Jiuquan 735000, Gansu, China
    2. Lanzhou Regional Climate Center, Lanzhou 730020, China
  • Received:2021-09-21 Revised:2021-11-11 Online:2022-02-28 Published:2022-02-28
  • Contact: LIN Shu

1961—2017年京津冀地区寒潮活动特征

李红英1(), 林纾2(), 王云鹏1, 黄鹏程2, 于亚楠1   

  1. 1.甘肃省酒泉市气象局,甘肃 酒泉 735000
    2.兰州区域气候中心,甘肃 兰州 730020
  • 通讯作者: 林纾
  • 作者简介:李红英(1979— ),女,高级工程师,主要从事决策气象服务与气候变化研究. E-mail: 16439597@qq.com
  • 基金资助:
    国家重点研发计划项目资助(2018YFC1505601)

Abstract:

Based on the daily minimum temperature and precipitation data from 126 meteorological observation stations in Beijing-Tianjin-Hebei (BTH) region from 1961 to 2017, the spatial and temporal characteristics of occurrence frequency of cold wave, and dry and wet characteristics of regional cold wave were analyzed by using defined discriminant index of dry and wet. The results are as follows: (1) The averageannual frequency of cold wave in BTH was more in the northwest than in the southeast, and 86% of the stations showed a decreasing trend in annual frequency of cold wave. (2) The accumulative occurrence station times of cold wave from 1961 to 2017 showed a significant decreasing trend (P<0.001) with a climate tendency rate of -5.7 station times per year and it mutated in 1983. The accumulative occurrence station times of cold wave from 1961 to 1971 reached a peak, it decreased sharply since 1972. The average accumulative occurrence station times of cold wave from 2007 to 2017 was the lowest in history. (3) The inter-annual variation of occurrence frequency of regional cold wave from 1961 to 2017 showed a decreasing trend with a climate tendency rate of -0.282 per decade. The frequency of regional cold wave was most in winter of 1960s, it was most in autumn and spring of 1970s, it reached the second peak in winter and spring of 2000s, and it was least in three seasons during 2011-2017. The frequency of regional cold wave was most in autumn, followed by winter and it was least in spring; the cold wave was most active in October and November. (4) The dry process was most in regional cold wave processes in BTH. From 2011 to 2017, the dry and wet characteristics of regional cold wave process showed the polarization distribution of dry process and wet process.

Key words: Beijing-Tianjin-Hebei (BTH) region, regional cold wave, dry and wet characteristic

摘要:

基于1961—2017年京津冀地区126个气象观测站逐日最低气温和降水资料,分析该区域寒潮发生频次时空变化特征,在此基础上通过定义的干湿判别指标分析区域性寒潮的干湿特征。结果表明:(1)京津冀地区单站寒潮年平均发生频次空间分布呈西北多东南少,86%的站点寒潮年发生频次呈减少趋势。(2)1961—2017年寒潮累计发生站次呈显著减少趋势(P<0.001),气候倾向率为-5.7站次·a-1, 且在1983年发生突变。1961—1971年寒潮累计发生站次出现峰值,从1972年开始锐减, 2007—2017年寒潮平均发生站次为历史最少。(3)1961—2017年区域性寒潮发生频次年际变化总体呈递减趋势,气候倾向率为-0.282次·(10 a)-1, 1960年代冬季区域性寒潮发生频次最多,1970年代秋季和春季最多,2000年代冬季和春季为次高峰期,2011—2017年3个季节最少。区域性寒潮发生频次季节分布中以秋季出现最多、其次是冬季、春季最少; 10月、11月寒潮最为活跃。(4)京津冀地区区域性寒潮过程干过程发生频次最多,2011—2017年区域性寒潮过程干湿特征趋向于干过程和湿过程两极化分布。

关键词: 京津冀地区, 寒潮, 区域性寒潮, 干湿特征

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