2021年8月汉中—广元降雨过程的BDS数据分析  

BDS data analysis of Hanzhong-Guangyuan rainfall process in August 2021

作　　者：徐爱功[1] 黄天舒 韩晓虎 赵洪涛[2] 徐宗秋[1] XU Aigong;HUANG Tianshu;HAN Xiaohu;ZHAO Hongtao;XU Zongqiu(School of Geomatics,Liaoning Technical University,Fuxin.Liaoning 123000,China;Liaoning Geology Engineering Vocational College,Dandong,Liaoning 118302,China)

机构地区：[1]辽宁工程技术大学测绘与地理科学学院,辽宁阜新123000 [2]辽宁地质工程职业学院,辽宁丹东118302

出　　处：《测绘科学》2023年第8期10-17,80,共9页Science of Surveying and Mapping

基　　金：国家自然科学基金项目(42030109,42074012);卫星导航系统与装备技术国家重点实验室开放基金项目(CEPNT-2018KF-13);辽宁省“兴辽英才计划”项目(XLYC2002101,XLYC2008034,XLYC2002098)。

摘　　要：针对降雨形成原因十分复杂,准确地预报极端天气十分重要且较为困难这一问题,该文以汉中—广元地区发生的持续时间长涉及范围广的降雨为例,采用该地区2年的探空数据建立的Tm模型,利用2021年8月19日—23日汉中—广元地区降雨时的北斗卫星导航系统(BDS)观测站数据解算大气可降水量(PWV)。研究表明:19日开始该地区PWV值不断增加,水汽开始聚集;一直到20日和21日在PWV达到峰值1~2h后小时降雨量达到最大值;22日和23日降雨逐渐减弱,水汽供应减少,PWV开始缓慢下降;整个降雨过程中PWV先增大后减小。PWV峰值越大对应的降雨等级也越大;在PWV达到峰值1~2h后小时降雨量才会达到最大值。在暴雨时该地区PWV峰值普遍超过50mm。Aiming at the problem that the causes of rainfall are very complicated,and it is very important and difficult to accurately forecast extreme weather,this paper took the long duration and wide range of rainfall in Hanzhong-Guangyuan region as an example,and used 2 years of radiosonde data to establish the Tm model.Precipitable water vapor(PWV)was calculated using the data of BeiDou navigation satellite system(BDS)observation station during rainfall in Hanzhong-Guangyuan area from August 19 to 23,2021.The results showed that the PWV value in this area increased continuously and water vapor began to gather from the 19th.On the 20 th and 21st,1~2 h after the PWV reached its peak,the hourly rainfall reached its maximum;On 22 nd and 23 rd,rainfall gradually weakened,water vapor supply decreased,and PWV began to decline slowly.PWV increased first and then decreased during the whole rainfall process.The greater the PWV peak value,the greater the rainfall level.The maximum rainfall would not be reached until 1 to 2 h after the PWV reached its peak.The peak value of PWV in this area generally exceeded 50 mm during heavy rainfall.

关 键 词：BDS 小时降雨量 大气可降水量 大气加权平均温度 

分 类 号：TP79[自动化与计算机技术—检测技术与自动化装置]