大气科学学报2017，Vol.40Issue(6)：841-849,9.DOI:10.13878/j.cnki.dqkxxb.20160829001
COSMIC掩星反演大气温湿资料的质量特征分析
Analyzing the quality of data for temperature and humidity using COSMIC radio occultation observations
摘要
Abstract
The Global Positioning System (GPS) demonstrates a novel and practical approach which is well-known globally,representing high-precision,high-vertical-resolution,and long-time sustain ability in different weather conditions proposed in early 1990s.The Constellation Observation System of Meteorology Ionosphere and Climate (COSMIC) program has been designed to provide advances in climatology,and space weather by using GPS satellites.The gathered data provides notable advances on the probing of neutral atmosphere and ionosphere.In addition,it is regarded as a robust solution for numerical weather prediction and the monitoring the climate changes.Before acquiring the atmospheric temperature and vapor pressure data by the COSMIC program,it seems to be necessary to control the quality of the spatial distribution characteristics.In this paper,to identify the existing differences in the quality of observations for between the land and ocean areas,the evolution characteristics including latitude and altitude coordinates as well as the quality of the atmospheric temperature and vapor pressure data obtained from COSMIC program are analyzed and assessed with the help of conventional radiosonde observations provided by National Centers for Environmental Prediction(NCEP) throughout the world,respectively.The results show that the temperature data retrieved by the COSMIC program is slightly lower than the NCEP observations over China.Moreover,the values of Root Mean Square Error(RMSE)for the temperature and vapor pressure data is negligible.In the global scale,there is a significant difference between the quality of the temperature and vapor pressure data retrieved from the COSMIC atmospheric data with the given latitudes and altitudes.Moreover,the quality differences in the horizontal and vertical distribution for the retrieved data from COSMIC atmospheric retrieved data are significant over land and ocean area.In general,the atmospheric temperature and vapor pressure data retrieved from COSMIC program demonstrates to be reliable and accurate,in which can be used for numerical weather prediction.On the other hand,the special distribution characteristics of quality of atmospheric temperature and vapor pressure using COSMIC atmospheric retrieved data can be regarded as a base for the quality control of observations as well.关键词
GPS掩星/COSMIC/探空资料/观测资料质量Key words
GPS radio occultation/COSMIC atmospheric retrieved data/TEMP data/quality of observations引用本文复制引用
马旭林,姜胜,于月明,郭欢..COSMIC掩星反演大气温湿资料的质量特征分析[J].大气科学学报,2017,40(6):841-849,9.基金项目
国家自然科学基金资助项目(41275111 （）
91437113) （）
公益性行业(气象)科研专项(GYHY201506005) （气象）
