四川盆地低涡的月际变化及其日降水分布统计特征
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- 英文论文题名：The statistical characteristic of Sichuan basin vortex and the distribution of daily precipitation
- 论文作者：李超 ; 李跃清 ; 蒋兴文
- 英文论文作者：Li Chao ; Li Yueqing ; Jiang Xingwen ; College of Atmospheric Science ; Chengdu University of Information Technology ; Institute of Plateau Meteorology ; CMA
- 年：2016
- 作者机构：成都信息工程学院大气科学学院;中国气象局成都高原气象研究所;
- 论文关键词：西南涡 ; 四川盆地涡 ; 日降水强度 ; 时空分布 ; 变化特征
- 英文论文关键词：southwest China vortex ; Sichuan basin vortex ; intensity of daily precipitation ; spacial distribution ; variation
- 会议召开时间：2016-11-01
- 会议录名称：第33届中国气象学会年会 S3 青藏高原与复杂山地天气气候
- 语种：中文
- 分类号：P426.6;P445
- 学会代码：ZGQX
- 会议名称：第33届中国气象学会年会
- 会议地点：中国陕西西安
- 主办单位：中国气象学会
- 学会名称：中国气象学会
- 页数：17
- 文件大小：897k
- 原文格式：D
- 会议级别：全国
摘要
利用ERA-interim再分析资料和全国824个气象基准站的日降水资料,统计分析了1983年1月1日~2012年12月31日发生在四川盆地的低涡天气过程及其降水特征,结果表明:盆地涡初生位置主要位于盆地的西南部和东北部,盆地涡夏季出现最多,冬季出现最少,其中初生位置位于盆地西南部的低涡7月出现最多,12月和1月出现最少;位于东北部的低涡6月出现最多,1月出现最少;盆地涡具有明显的日变化,东北型盆地涡夜发性明显,但西南型盆地涡不明显。西南型盆地涡夜间发生概率随月份先减少后增加,月际变化明显,但东北型盆地涡夜间发生概率月际变化却并不明显;盆地涡生命史与对流程度具有相关性,对流发展有利于盆地涡长时间维持,然而,夏季西南型盆地涡即使对流没向上发展也能长时间维持;盆地涡夏季移出最多,尤其以7、8月最明显,冬季移出最少,7月前以偏东路径为主,7月后以东北路径为主;盆地涡频数的月际变化与川西高原西南涡源地的风场扰动移出有密切联系,九龙地区夏季风场扰动移出活跃,冬季移出不活跃。小金地区春季风场扰动移出活跃,冬季移出不活跃。九龙地区风场扰动移出对盆地涡频数的月际变化贡献明显,小金地区风场扰动移出对盆地涡频数的月际变化贡献不明显;夏半年(5-10月)西南型盆地涡和东北型盆地涡引起的日降水区域分布的月际变化特征不同,前者的日降水最大值中心随月份先由盆地东北部向西南部移动,之后再由盆地西南部向东北部折回,后者的日降水最大值中心会一直稳定维持在盆地的东北部达州地区。东北型盆地涡虽然出现频次低,但各月的日降水强度要远大于西南型盆地涡。
Based on the ERA-interim reanalysis data and the daily meteorological precipitation data of 824 China stations, we count and analyze the weather process and the characteristic ofprecipitation, which are contributed by Sichuan basin vortex during January 1, 1983 and December 31, 2012. The result suggests that the basin vortex usually occurs at the southwest or the northeast of Sichuan basin, which are called southwest type and northeast type. The basin vortex occurs most frequent in summer and least frequent in winter, the southwest type of basin vortex occurs most frequent in July and least frequent in January and December, however, the northeast type occurs most frequent in June and least frequent in January. The frequency of basin vortex changes severely within one day, the northeast type occurs more frequently in the night than in the day time, however, the southwest type don't have the characteristic. The nocturnal characteristic of southwest type changes with the time passing by. However,the northeast type do not. There is a significant correlation between the lifespan of basin vortex and its convection, however, the southwest type is still able to maintain even if the convection is not reinforced. Basin vortex moves out of Sichuan basin most frequent in summer and least frequent in winter, moreover it moves forward in the east path before July and in the northeast path after July. There is a significant correlation between the frequency of basin vortex and wind vibration at southwest basin vortex cradle land, the wind vibration at Jiulong region moves out of cradle land actively in summer and not actively in winter, the wind vibration at Xiaojin region moves out of cradle land actively in spring and not actively in winter. The wind vibration at Jiulong region contributes more to the frequency of basin vortex than Xiaojin region. The daily precipitation distribution contributed by each type is different during May and October, the maximum precipitation area of northeast type keeps stationary while the southwest type moves regularly. Although the northeast type occurs less frequent, it brings more daily precipitation than the southwest type.
Based on the ERA-interim reanalysis data and the daily meteorological precipitation data of 824 China stations, we count and analyze the weather process and the characteristic ofprecipitation, which are contributed by Sichuan basin vortex during January 1, 1983 and December 31, 2012. The result suggests that the basin vortex usually occurs at the southwest or the northeast of Sichuan basin, which are called southwest type and northeast type. The basin vortex occurs most frequent in summer and least frequent in winter, the southwest type of basin vortex occurs most frequent in July and least frequent in January and December, however, the northeast type occurs most frequent in June and least frequent in January. The frequency of basin vortex changes severely within one day, the northeast type occurs more frequently in the night than in the day time, however, the southwest type don't have the characteristic. The nocturnal characteristic of southwest type changes with the time passing by. However,the northeast type do not. There is a significant correlation between the lifespan of basin vortex and its convection, however, the southwest type is still able to maintain even if the convection is not reinforced. Basin vortex moves out of Sichuan basin most frequent in summer and least frequent in winter, moreover it moves forward in the east path before July and in the northeast path after July. There is a significant correlation between the frequency of basin vortex and wind vibration at southwest basin vortex cradle land, the wind vibration at Jiulong region moves out of cradle land actively in summer and not actively in winter, the wind vibration at Xiaojin region moves out of cradle land actively in spring and not actively in winter. The wind vibration at Jiulong region contributes more to the frequency of basin vortex than Xiaojin region. The daily precipitation distribution contributed by each type is different during May and October, the maximum precipitation area of northeast type keeps stationary while the southwest type moves regularly. Although the northeast type occurs less frequent, it brings more daily precipitation than the southwest type.
引文
[1]李国平.2007.青藏高原动力气象学[M]..北京:气象出版社,23pp
[2]陶诗言.1980.中国之暴雨[M].北京:科学出版社,225pp
[3]卢敬华.1986.西南低涡概论[M].北京:气象出本社,58pp
[4]叶笃正,高由禧.1979.青藏高原气象学[M].北京:科学出版社,115-121.
[5]徐裕华.1991.西南气候[M].北京:气象出本社,56-60.
[6]陈忠明,闵文彬.2000.西南低涡的统计研究.[M]//陶诗言等.第二次青藏高原大气科学实验理论研究进展.北京:气象出版社,268-378.
[7]王作述,汪迎辉,梁益国.1996.一次西南低涡暴雨的数值试验研究.[M]//暴雨科学、业务实验和天气动力学理论的研究.北京:气象出版社,:257-267.
[8]ZHONG Rui,ZHONG Lin-Hao,HUA Li-Juan,etc.2014.A Climatology of the Southwest Vortex during 1979–2008[J].Atmos.—Ocean,7(6),577-583.
[9]FU Shen-Ming,ZHANG Jing-Ping,SUN Jian-Hua,etc.2014.A Fourteen-Year Climatology of the Southwest Vortex in Summer[J].Atmos.—Ocean,7(6),510-514.
[10]陈启智,黄奕武,王琪玮,等.2007.1990-2004年西南低涡活动的统计研究[J].南京大学学报(自然科学),43(6):633-642.
[11]谌贵珣,何光碧.2008.2000-2007年西南低涡活动的统计分析[J].高原山地气象研究,28(4):59-65.
[12]马振峰,汪之义.1983.西南低涡活动的若干统计分析[J].四川气象,2(1):11-15
[13]卢敬华,陈刚毅.1993.西南低涡的一些基本事实及初步分析[J].成都气象学院学报,27(4):7-15.
[14]云南大学物理系气象专业.1975.西南低涡形成及其涡源问题.气象,1(4):11-13.
[15]何光碧.2012.西南低涡研究综述[J].气象,2(2):155-163.
[16]潘旸,李建,宇如聪.2011.东移西南低涡空间结构的气候学特征[J].气候与环境研究,16(1):60-70.
[17]傅慎明.2009.引发强降水的西南低涡结构特征及其发生发展机理研究[D].中国科学院大气物理研究所博士学位论文.
[2]陶诗言.1980.中国之暴雨[M].北京:科学出版社,225pp
[3]卢敬华.1986.西南低涡概论[M].北京:气象出本社,58pp
[4]叶笃正,高由禧.1979.青藏高原气象学[M].北京:科学出版社,115-121.
[5]徐裕华.1991.西南气候[M].北京:气象出本社,56-60.
[6]陈忠明,闵文彬.2000.西南低涡的统计研究.[M]//陶诗言等.第二次青藏高原大气科学实验理论研究进展.北京:气象出版社,268-378.
[7]王作述,汪迎辉,梁益国.1996.一次西南低涡暴雨的数值试验研究.[M]//暴雨科学、业务实验和天气动力学理论的研究.北京:气象出版社,:257-267.
[8]ZHONG Rui,ZHONG Lin-Hao,HUA Li-Juan,etc.2014.A Climatology of the Southwest Vortex during 1979–2008[J].Atmos.—Ocean,7(6),577-583.
[9]FU Shen-Ming,ZHANG Jing-Ping,SUN Jian-Hua,etc.2014.A Fourteen-Year Climatology of the Southwest Vortex in Summer[J].Atmos.—Ocean,7(6),510-514.
[10]陈启智,黄奕武,王琪玮,等.2007.1990-2004年西南低涡活动的统计研究[J].南京大学学报(自然科学),43(6):633-642.
[11]谌贵珣,何光碧.2008.2000-2007年西南低涡活动的统计分析[J].高原山地气象研究,28(4):59-65.
[12]马振峰,汪之义.1983.西南低涡活动的若干统计分析[J].四川气象,2(1):11-15
[13]卢敬华,陈刚毅.1993.西南低涡的一些基本事实及初步分析[J].成都气象学院学报,27(4):7-15.
[14]云南大学物理系气象专业.1975.西南低涡形成及其涡源问题.气象,1(4):11-13.
[15]何光碧.2012.西南低涡研究综述[J].气象,2(2):155-163.
[16]潘旸,李建,宇如聪.2011.东移西南低涡空间结构的气候学特征[J].气候与环境研究,16(1):60-70.
[17]傅慎明.2009.引发强降水的西南低涡结构特征及其发生发展机理研究[D].中国科学院大气物理研究所博士学位论文.