鲁中地区不同持续时间年最大降水特征  

Characteristics of Annual Maximum Precipitation with Different Durations in the Middle Area of Shandong Province

作　　者：环海军 刘岩 孟伟 夏福华 

机构地区：[1]山东省淄博市气象局,山东淄博255048

出　　处：《干旱气象》2017年第5期815-821,共7页Journal of Arid Meteorology

基　　金：山东省气象局气象科学技术研究项目"鲁中地区极端降水事件时空变化特征及暴雨强度公式分区研究"(2016sdqxm13)资助

摘　　要：基于鲁中地区8个气象站1999—2015年逐分钟降水数据,分析15个历时年最大降水变化特征。结果表明:鲁中地区年最大降水强度由短历时向长历时递减,短历时和长历时年最大降水量分别达特大暴雨和暴雨级别的年份最多;南部山区沂源和北部高青平原多数历时年最大降水强度随时间呈减少趋势,其他地区5~15 min历时随时间呈增加趋势,其他历时多数呈减少趋势;各历时多年平均最大降水强度大值均在西南部山区,山区各历时降水强度高于其他地区,年最大降水强度空间差异由短历时向长历时缩小;多数地区各历时年最大降水最早出现在5、6月,最晚出现在8、9月,最多出现在7、8月,南部山区沂源和北部高青平原年各历时最大降水出现日期随时间呈提前趋势,其他地区变化趋势不显著;短历时年最大降水最易从傍晚开始,随着历时的增加,开始时间由傍晚向上半夜推迟,南部山区沂源各历时年最大降水最多开始于凌晨和上午,而北部高青平原最多开始于下半夜和凌晨,其他地区短历时年最大降水最多开始于下午和傍晚,长历时最多开始于夜间和凌晨。Based on the minutely precipitation data of eight meteorological stations during 1999-2015 in the middle area of Shandong Province,the variation characteristics of annual maximum precipitation with fifteen durations were analyzed. The results show that the annual maximum precipitation amount decreased from short durations to long durations,annual maximum precipitation with short durations and long durations reached extraordinary rainstorm and rainstorm level at most years,respectively. The annual maximum precipitation intensity for most duration decreased in the southern Yiyuan mountain area and northern Gaoqing plain. The annual maximum precipitation intensity with durations ranging from five to fifteen minutes increased with time in the other regions,but most of other durations of it decreased with time. The strong center of average annual maximum precipitation intensity for fifteen durations was in the southwest mountainous region,in which the precipitation intensity was higher than that of other regions. The spatial difference of annual maximum precipitation intensity decreased from short duration to long duration. The annual maximum precipitation for fifteen durations first appeared in May and June in most regions,appeared in August and September at the latest. The annual maximum precipitation for fifteen durations appeared most frequently in July and August,the dates of annual maximum precipitation for different durations showed an advanced trend in the southern Yiyuan mountain area and northern Gaoqing plain,but it was not significant in the other regions. The annual maximum precipitation with shorter durations begun in the dusk,the beginning time postponed from dusk to the first half of the night with the increase of duration. The annual maximum precipitation for fifteen durations begun most frequently in the dawn and morning in the southern Yiyuan mountain area,while it begun in the midnight and early morning in the northern Gaoqing plain. The annual maximum precipitation for shorter durations begun most

关 键 词：短历时 长历时 年最大降水 变化特征 

分 类 号：P468.024[天文地球—大气科学及气象学]