Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2014, Vol. 30 ›› Issue (35): 227-233.doi: 10.11924/j.issn.1000-6850.2014-2209

Special Issue: 农业气象

Previous Articles     Next Articles

Temporal-Spatial Distribution Characteristics of the First Soaking Rain in Spring Soaking Season of Liaoning Province and its Synoptic Analysis

  

  • Received:2014-08-13 Revised:2014-11-04 Accepted:2014-09-29 Online:2015-03-18 Published:2015-03-18

Abstract: Based on daily precipitation data of 49 meteorological stations in Liaoning Province from April to May during 1960-2014 and NCEP reanalysis data, the temporal-spatial distribution characteristics and its synoptic conditions of the first soaking rain were analyzed during spring soaking season in Liaoning Province. The results show that evident regional differences exist in the spatial distribution of average date of single station soaking rain,the number of no soaking rain and average soaking rainfall, such as average dates of single station soaking rain are gradually late from east to west. The average date of regional soaking rain is April 19 in recent 55 years, and there are periodic variations about 14,9,5 and 3 years. The most spatial distribution pattern of regional soaking rainfall is that the rainfall distribution decreases gradually from southeast to northwest under the background of the overall consensus, the spatial distribution which in middle and east region are contrary to which in the west is secondly, that is to say, there are soaking rain in middle and east, but not in west, and vice-versa. Upper air circulation of regional soaking rain can be divided into three kinds of synoptic models: deep trough pattern,east Asia invertedΩpattern and short wave trough pattern.