气象与环境学报2017，Vol.33Issue(4)：56-63,8.DOI:10.3969/j.issn.1673-503X.2017.04.007
辽宁省短时强降水气候特征分析
Analysis of climatic characteristics of short-time strong precipitation in Liaoning province
摘要
Abstract
Using hourly precipitation data originated from digital information processing of recording paper data from 53 national weather stations during 1971-2003 and rainfall observation data from automatic weather stations during 2004-2014 in Liaoning province,the spatial-temporal characteristics of April-October short-time strong pre-cipitation ( STSP) in Liaoning province were investigated. The results show that the spatial distribution of the STSP frequencies during the period from 1971 to 2014 is consistent with the spatial distribution of the total annual precipitation,both are larger in the east and lower in the west of Liaoning province and have a close corresponding relation with the terrain of Liaoning province and the wind direction of the southwest low-level jet. More specifical-ly,the annual frequencies of STSP which have well correspondence with a waterlogging-drought change in Liaon-ing province dramatically vary between 1. 5 and 3. 5 during 1971-2014 . The STSP concentrates in July and August in Liaoning province and is dominantly distributed in Dandong. Furthermore,the frequency of ten-day STSP firstly increases and then decreases during June to August and its peak value appears in last July. At the same time,the change trend of STSP frequency varies among different areas. Moreover,the diurnal variation of STSP frequency has the feature of territoriality,under the influence of the terrain and the diurnal change of the low-level jet and is not obvious in the north and the westernmost of Liaoning province. The STSP tends to occur over the period from the middle of the night to the morning in the south of Liaoning province while it occurs more frequently in the af-ternoon in the rest of Liaoning province.关键词
短时强降水/地形/低空急流Key words
Short-time strong precipitation/Terrain/Low-level jet分类
天文与地球科学引用本文复制引用
李燕,赛瀚,刘静,刘硕..辽宁省短时强降水气候特征分析[J].气象与环境学报,2017,33(4):56-63,8.基金项目
环渤海区域科技协同创新基金项目(QYXM201502)资助. （QYXM201502）
