神农架及周边地区夏季气象要素时空特征初步分析  

Preliminary analysis of summer meteorological fields in Shennongjia and its surrounding areas

作　　者：赵娴婷[1] 赵玉春[1] 赖安伟[1] 王孝慈[2] 

机构地区：[1]中国气象局武汉暴雨研究所暴雨监测预警湖北省重点实验室,武汉430074 [2]武汉中心气象台,武汉430074

出　　处：《暴雨灾害》2013年第3期268-275,共8页Torrential Rain and Disasters

基　　金：国家自然科学基金项目(41075038);公益性行业(气象)科研专项(GYHY201306016;GYHY201106003)

摘　　要：采用2010—2011年6—8月神农架及周边地区高山自动气象站观测的逐时资料,初步分析了神农架及周边地区夏季降水、气温、风场等气象要素的时空分布特征。结果发现:降水时数基本呈现随着海拔的增高而增多的趋势。东北坡和东南坡降水时数日变化整体均呈单峰型变化趋势,峰值出现在午后至傍晚,西南坡降水时数的日变化分布均匀。西南坡最高气温出现时间偏晚。多数站点2010—2011年夏季盛行风向具有一致性。局地风场受地形影响很大,日变化明显,可能由山谷风效应引起。海拔较高的站点水汽昼夜变化较大,海拔较低的站点水汽昼夜变化较小。东北坡松柏站夜间盛行西北风,水汽大幅度减少,白天盛行东南风,水汽增加,可能是午后降水时数明显增多的原因之一。Using the hourly data observed by automatic mountain stations in June, July and August of 2010---2011 in Shennongjia and its surrounding areas, the characteristics of precipitation, temperature, wind field etc. are analyzed. The analysis shows that the precipitation hours increased with increasing altitude. Diurnal variation curves of the precipitation hours on the northeast and southeast slopes had a single peak. The peak appeared during the period between afternoon and the early evening. Diurnal variation of the precipitation hours on the south- west slope was small. The maximum surface air temperature on the southwest slope appeared later. The summer prevailing wind directions be- tween 2010 and 2011 had good consistency over most of the stations. The local wind field was affected greatly by the terrain and had clear dai- ly variation that was probably caused by the mountain and valley breeze. Moisture had greater differences between day and night on the sta- tions with higher elevations than on the stations with lower elevations. At the Songbai weather station, the most frequent wind direction was northwest and the moisture was largely reduced in the nighttime, while the most frequent wind direction was southeast and the moisture in- creased in the daytime. This could be one of reasons of increased precipitation hours afler noon at the Songbai station.

关 键 词：神农架 自动气象站 气象要素 日变化 

分 类 号：P412.1[天文地球—大气科学及气象学]