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| 蒙贝低涡类环北京暴雨过程分型研究 | |
| 引用本文： | 姜学恭,李彰俊,宫春宁,李新,付辰龙.蒙贝低涡类环北京暴雨过程分型研究[J].南京气象学院学报,2010,33(4):412-419. |
| 作者姓名： | 姜学恭 李彰俊 宫春宁 李新 付辰龙 |
| 作者单位： | 1. 内蒙古自治区气象台,内蒙古,呼和浩特,010051 2. 内蒙古锡林郭勒盟太仆寺气象局,内蒙古,太仆寺旗,026000 3. 南京信息工程大学,大气科学学院,江苏,南京,210044 |
| 基金项目： | 公益性行业(气象)科研专项 |
| 摘 要： | 利用天气观测资料、NCEP/NCAR再分析资料对1998—2008年发生的20例蒙贝低涡导致的环北京暴雨过程进行了分型研究。依据环流特征和天气系统配置,将该类暴雨过程分为两脊一槽型、阻塞型和低涡—副高南北对峙型。其中,两脊一槽型是斜压性较强的冷涡暴雨过程,天气和次天气尺度强迫均对暴雨发生产生影响,水汽来源于对流层低层西南气流的输送。阻塞型具有明显的局地对流暴雨特征,由两高之间宽广低压带上活跃的中尺度对流系统引发,高低空急流区产生的次天气尺度强迫是中尺度对流系统的触发因素之一。低涡—副高南北对峙型是低涡底部发展中的高空槽与北抬西太平洋副高相互作用产生的系统性暴雨过程,这一相互作用常强迫产生西南低空急流,为系统性暴雨的发生提供了充沛的水汽供应。 |
| 关 键 词： | 暴雨 环北京 蒙贝低涡 分型 天气学概念模型 |
A Classification-based Research on Rainstorm Processes around Beijing Caused by Mongolia-Baikal Low |
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| JIANG Xue-gong,LI Zhang-jun,GONG Chun-ning,LI Xin,FU Chen-long.A Classification-based Research on Rainstorm Processes around Beijing Caused by Mongolia-Baikal Low[J].Journal of Nanjing Institute of Meteorology,2010,33(4):412-419. | |
| Authors: | JIANG Xue-gong LI Zhang-jun GONG Chun-ning LI Xin FU Chen-long |
| Institution: | 1.Inner Mongolia Autonomous Region Meteorological Observatory,Huhhot 010051,China;2.Taibus Meteorological Office,Taibus 026000,China;3.School of Atmospheric Sciences,NUIST,Nanjing 210044,China) |
| Abstract: | By using the meteorological observations and NCEP/NCAR reanalysis data,a classification-based research on the rainstorm processes around Beijing induced by the Mongolia-Baikal low from 1998 to 2008 are conducted.According to the configuration of atmospheric circulation and weather systems,the rainstorm processes are divided into three types,namely the two ridges and one trough-type,the block-type,and the low and subtropical high confrontation-type respectively.Their synoptic conception models are also summarized.For the first type,the rainstorm is caused by the cold low with strong baroclinicity.Both synoptic and sub-synoptic scale dynamical forcing are favorable for the rainstorm.The vapor is transported by southwest air current in the lower troposphere.For the second one,the rainstorm with local and convectional characteristics is caused by the mesoscale convectional systems（MCS） formed in the wide area with low pressure between the two high.The sub-synoptic scale dynamical forcing induced by the collective effect of high and low level jets is favorable for the triggering of MCS.For the third one,the rainstorm is induced by the interaction between the developing upper trough and the Western Pacific subtropical high.The interaction also triggers the southwest low level jet,which transports abundant vapor there. |
| Keywords: | rainstorm around Beijing Mongolia-Baikal low classification synoptic conception model |
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