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doi:  10.12013/qxyjzyj2021-005
江西省2018年秋冬连阴雨天气异常特征及成因

Anomalous characteristics and causes of continuous rainy in autumn and winter in 2018 in Jiangxi province
摘要点击 1014  全文点击 928  投稿时间:2020-09-04  修订日期:2021-01-10
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基金:  2018年江西省科技厅重点研发计划项目(编号:20181BBG78018);2016年江西省气象局面上项目“江西省设计暴雨雨型研究”
中文关键词:  连阴雨,大气环流异常,El Nino
英文关键词:  continuous rainy  atmospheric circulation anomaly  El Nino
        
作者中文名作者英文名单位
胡菊芳Hu Jufang江西省气候中心
马锋敏Ma Fengmin江西省气候中心
占龙飞Zhan Longfei江西省气候中心
引用:胡菊芳,马锋敏,占龙飞.2021,江西省2018年秋冬连阴雨天气异常特征及成因[J].气象与减灾研究,44(1):34-41
中文摘要:
      2018年11月1日—2019年3月10日江西省出现区域性连续阴雨寡照天气,文中利用实时检测、历史同期数据和连阴雨极端天气气候事件指标,结合NCEP/NCAR逐日再分析资料和NOAA全球海表温度资料,对这次区域连阴雨天气的异常气候特征和成因进行分析。结果表明:1) 此次区域连阴雨天气具有阴雨、连阴雨日数多,累计雨量大、雨日多,日照时数少、无日照和连续无日照日数多等特点。2) 连阴雨天气期间,北半球环流形势异常,欧亚中高纬呈“两脊两槽”型环流控制,有利于冷空气入侵我国南方地区;西太平洋副热带高压较常年偏强,西伸脊点偏西,脊线位置偏北,异常西南风水汽输送为持续阴雨天气提供了丰沛的水汽条件并与南下冷空气在江淮至江南地区交汇,造成江西降水异常偏多。3) 赤道中东太平洋海温异常对江西秋冬季降水量和阴雨日数有重要影响;2018年江西秋冬季降水表现出对典型El Nin〖TX~〗o事件的响应,在El Nin〖TX~〗o的影响下,2018年江西省秋冬季降水量和阴雨日数偏多。
Abstract:
      Jiangxi province experienced regional continuous rainy weather with little sunshine from November 1, 2018 to March 10, 2019. By comparing the real time monitoring data with historical synchronization, and monitoring the indicators of continuous rainy extreme weather events, the abnormal climate characteristics and causes of continuous rainy weather in this region were analyzed using the NCEP/NCAR daily reanalysis data and NOAA global sea surface temperature data. The results showed that: 1) The continuous rainy weather in this area presented the characteristics of more rainy and continuous rainy days, larger accumulated rainfall and more rainy days, few sunshine hours or no sunshine, and more consecutive days without sunshine. 2) During the continuous rainy weather, the circulation situation in the northern hemisphere was abnormal. The middle and high latitudes of Europe and Asia were controlled by the “two ridges and two troughs” circulation, which was conducive to the invasion of cold air into southern China; The Western Pacific subtropical high was stronger than usual, and the west extension ridge point was westward. The ridge line was located to the north, and the abnormal southwest wind provided abundant water vapor conditions for the continuous rainy weather and converged with the cold south air from Jianghuai to Jiangnan area, resulting in abnormal strong precipitation in Jiangxi. 3) The precipitation and rainy days occurred much more in autumn and winter of El Nino years in Jiangxi. In autumn and winter, precipitation in Jiangxi in 2018 showed a response to the typical El Nino event.
主办单位:江西省气象学会 单位地址:南昌市高新开发区艾溪湖二路323号
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