摘要
利用1980 ～ 2010年广西日雨量资料和欧洲中期天气预报中心新一代再分析资料（ERA-interim）,对广西非台风类大范围持续暴雨过程的主要影响系统进行统计和分型,并在此基础上采用合成方法对不同类型的暴雨发生演变环境条件和物理量场特征进行分析.结果表明,31年间广西非台风类大范围持续暴雨出现在1～9月,其中5～7月占81％;根据影响系统可分为高原槽、南支槽、切变线（低涡）3种主要的环流型;5～7月以高原槽类为主;南支槽是冬春到夏初期间持续性暴雨的主要系统,尤其以5月份占优势;切变线类则仅发生在4～9月;合成分析表明3类持续暴雨发生的高低空环流系统的“锁相”配置有明显区别,合成分析模型可供实际预报参考.
The wide range continuous rainstorm cases （non-tropical storm） were analyzed, using statistical method and classification method, based on daily rainfall data and ERA-interim reanalyzed data from 1980 to 2010. The features of circulation and physic indices were found by composite analyzing. The results showed that： the wide range continuous rainstorms of Guangxi happen in the period from January to Septem- ber, and 81% during May-July. It could be classified into 3 types ： plateau trough type （ PT）, south branch trough type （SBT） and shear line type （SL）. The PT happens between May to July. SBT is the principal system in winter and spring, especially in May. SL happens between April to September. The circulation and physic index features of each type are particular and different, which could be used as instructions in daily forecasting.
出处
《安徽农业科学》
CAS
2013年第24期10147-10150,共4页
Journal of Anhui Agricultural Sciences
基金
华南区域气象中心项目(CRMC2012M07)
2013广西自然科学基金项目(2013GXNSFAA019288)
广西气象局科研项目(桂气科201104
桂气科200705)
关键词
持续性暴雨
非台风类
大范围
分型
特征
Continuous rainstorm
Non-tropical storm
Wide range
Classification
Features
