【摘要】 利用镇江1961—2017年逐日气温资料分析连续高温灾害的气候特征,同时结合2.5°×2.5°逐日NCEP再分析资料,以2017年夏季异常连续高温天气过程为典型进行诊断分析。结果表明:1961年以来镇江夏季高温日数、极端日最高气温和最长连续高温日数均呈现明显上升趋势;20世纪90年代后连续高温灾害发生更为频繁,同时连续高温灾害等级也显著上升;强盛的西太平洋副热带高压长时间盘踞镇江上空是产生连续高温灾害的主要原因;高温期间冷空气势力弱,海上台风、青藏高原暖高压的特殊活动路径,为副高的稳定维持提供有利条件;温度平流和垂直加热对高温的出现起重要作用,而高温的维持以及极端高温的出现更多的取决于非绝热加热。更多还原

【Abstract】 this article will use the daily temperature data of 4 stations in Zhenjiang from the year 1961 to 2017 to analyze the continuous high temperature disaster in this region;It will use the 2.5°× 2.5° daily NCEP reanalysis data to analyze the materials at the same time. It will take the continuous high temperature disaster in the summer of 2017 as a typical case to diagnosis analysis the cause of synoptic meteorology. The result shows:The high temperature days,the maximum temperature and the longest continuous hot days in the Zhenjiang region have shown a significant upward trend since 1961;After 1990 s,continuous high temperature disasters had occurred more frequently,while the level of continuous high temperature disasters also increased significantly;The main reason for the continuous high temperature disasters is long staying time of the strong western pacific subtropical highpressure;During the high temperature period,the weak air force and the special activity way of the typhoon in the sea and the warm and high pressure of the Tibetan Plateau provide a favorable condition for the stability of the western Pacific subtropical high pressure;Temperature advection and vertical heating are playing an important role in the appearance of high temperature,while the maintenance of high temperature maintenance and the present of extreme high temperature mostly depend on diabatic heating.更多还原