CAJ | 학술논문

基于1971-2012年内蒙古地区116站逐日降水资料，利用线性倾向估计、Mann-Kendall突变检验等方法，分析了内蒙古地区暴雨时空分布特征。结果表明，时间变化看，21世纪以来暴雨日减少显著，但暴雨强度却呈现增强趋势；暴雨日存在明显的年代际变化特征，90年代是暴雨多发年代。空间分布看,暴雨发生频率自西向东迅速递增，东部地区是内蒙古暴雨发生频率最高的地区，暴雨最少发生的地区是内蒙古西部地区；大兴安岭山脉东南麓中雨贡献率最大，其余地区小雨贡献率最大,总体上看暴雨贡献率最小。
기우1971-2012년내몽고지구116참축일강수자료，이용선성경향고계、Mann-Kendall돌변검험등방법，분석료내몽고지구폭우시공분포특정。결과표명，시간변화간，21세기이래폭우일감소현저，단폭우강도각정현증강추세；폭우일존재명현적년대제변화특정，90년대시폭우다발년대。공간분포간,폭우발생빈솔자서향동신속체증，동부지구시내몽고폭우발생빈솔최고적지구，폭우최소발생적지구시내몽고서부지구；대흥안령산맥동남록중우공헌솔최대，기여지구소우공헌솔최대,총체상간폭우공헌솔최소。
Based on the daily precipitation of 116 stations from 1971 to 2012 over Inner Mongolia , by means of linear trend estimate, Mann-Kendall test method, temporal and spatial characteristics of torrential rain are analyzed over the whole region . The results suggest that:on the timescale change, the days of the torrential rain has an obvious decreasing trend especially since the 21th centuries, but the intensity of the torrential rain days has increased to some extent. Characteristics of interdecadal variation of torrential rain days is obvious, the torrential rain occurs frequently in the 1990s. On the spatial distribution, the occurrence frequency of torrential rain is increasing tendency from the west to the east, the occurrence frequency of torrential rain is the most in the east area and the least in the west area. The contribution rate of torrential rain is the most on the southeast of Daxing’an Mountains, the contribution rate of light rain is the most on the other regions, on the whole , the contribution rate of torrential rain is the least.