CAJ | 학술논문

采用逐日降水资料，对4—7月逐候雨量进行了分析，确定了气候学意义上雨季结束候。从降水量和环流2个指标来定义雨季结束日期：一是采用NCEP／NCAR北半球500hPa逐日再分析资料，确定西太平洋副高脊线稳定北跳过20°N和25°N的日期T20和T25；二是采用逐日降水资料，确定4—7月西风带系统影响的最后一次大暴雨（或大暴雨）降水过程的结束El期TR，最后根据T20、T25和TR进行综合判断，确定雨季结束期日期。江西雨季结束期呈现出各年差异大，北部比南部迟，且阶段性变化明显等特点。
채용축일강수자료，대4—7월축후우량진행료분석，학정료기후학의의상우계결속후。종강수량화배류2개지표래정의우계결속일기：일시채용NCEP／NCAR북반구500hPa축일재분석자료，학정서태평양부고척선은정북도과20°N화25°N적일기T20화T25；이시채용축일강수자료，학정4—7월서풍대계통영향적최후일차대폭우（혹대폭우）강수과정적결속El기TR，최후근거T20、T25화TR진행종합판단，학정우계결속기일기。강서우계결속기정현출각년차이대，북부비남부지，차계단성변화명현등특점。
In this paper, using the daily precipitation data of April to July, the pentad precipitation was analyzed to determine the climatologically significance on end-date of the rainy season. Two indi- cators, precipitation and circulation, were used to define the end-date of the rainy season:firstly, u- sing NCEP/NCAR daily reanalysis data in northern hemisphere 500 hPa to determine the date which West Pacific subtropical high ridge line north to skip the 20°N (T20)and 25°N (T25), Secondly, dai- ly rainfall data from April to in July was used to determining the Westerly's system effects of the last heavy rain to rainstorm (or heavy rainstorm) precipitation process end date (TR ). According to T20, T25 and Ta comprehensive judgment, the end of the rainy season dates was identifies. The results showed, there is distinct difference on the end-date of the rainy season during the years in Jiangxi Province, which in the northern is later than southern, and the phase change significantly.