融合特性层观测资料推算探空站海拔高度的方法  

Determination of Radiosonde Station Elevation from Observational Data with Significant Level Record

作　　者：阮新[1] 朱艳峰[1] 鞠晓慧[1] 

机构地区：[1]国家气象信息中心,北京100081

出　　处：《高原气象》2011年第2期532-537,共6页Plateau Meteorology

基　　金：国家重点基础研究发展计划项目(2010CB951602);公益性行业(气象)科研专项(GYHY(QX)200906014;GYHY(QX)200906003)共同资助

摘　　要：探空站的海拔高度信息对于探空资料的质量控制至关重要,准确的台站信息也是资料正确使用的保障。测站海拔高度信息不随台站观测资料上传全球通信系统,各种来源的台站高度信息都可能存在错误。为了核准测站的海拔高度信息,本文提出了融合特性层观测资料推算探空站海拔高度的方法,该方法能够提高推算精度,并能克服不同天气气候条件对推算测站海拔高度准确性的影响。利用2008年中国110个探空站观测资料对该方法进行了检验,结果表明,特性层记录的利用明显提高了推算测站海拔高度的准确性,尤其是对于青藏高原地区的探空站,不用特性层记录推算的测站高度在某些月份与真实高度相差高达20~40 m,而融合了特性层记录后最大误差不超过11 m。通过对推算测站海拔高度时间序列的分析,可以准确检测出测站高度发生变化的时间和幅度。Radiosonde station elevation is important in quality control and correct using the radiosonde data.Station elevation is not transmitted with the sounding,and radiosonde metadata from almost all sources contain erroneous information.This paper proposed a method to determine radiosonde station elevation from observational data with significant level records.This method could improve the accuracy of calculated elevations,and is free from the influence of weather and climate conditions.Its effect is evaluated with data at 110 radiosonde stations of China in 2008.The result shows that the involvement of records on significant levels improves the accuracy of calculated elevations,especially for stations in Tibetan Plateau.This method decreases the difference between the calculated elevation and true elevation below 11 m,while without significant level records the difference could be as large as 20~40 m in certain months.Besides,the time and scale of station elevation changes can be detected with accuracy by analyzing the time series of calculated elevations.

关 键 词：青藏高原 特性层 探空站海拔高度 

分 类 号：P413[天文地球—大气科学及气象学]