Evaluation of AIRS Precipitable Water Vapor against Ground-based GPS Measurements over the Tibetan Plateau and Its Surroundings (Special Issue on Japan-China Meteorological Disaster Reduction Corporation Research Center Project (JICA/Tibet Project))
Evaluation of AIRS Precipitable Water Vapor against Ground-based GPS Measurements over the Tibetan Plateau and Its Surroundings (Special Issue on Japan-China Meteorological Disaster Reduction Corporation Research Center Project (JICA/Tibet Project))
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DOI：
10.2151/jmsj.2012-c06
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发表时间：
2012-07
影响因子：
3.1
通讯作者：
J. Qin;Kun Yang;T. Koike
中科院分区：
文献类型：
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作者：
J. Qin;Kun Yang;T. Koike
Aqua卫星上的大气红外探测仪（AIRS）提供了可降水量的估计值，可将其纳入数值预报模型，以改进降水预报。在这项研究中，AIRS反演的PWV进行了评估，对地基GPS测量在青藏高原（TP）及其周边地区的24个站。首先，在这些站的GPS延迟信号的PWV估计的改进，通过应用一个新的方案来计算的水汽加权平均大气温度，在GPS PWV检索的关键参数。与传统的检索相比，这种修订可以提高PWD估计高达6%，在某些情况下。其次，新检索的PWV数据用于评估AIRS产品。在评估之前，对这些GPS PWV数据进行高程校正，
The Atmospheric Infrared Sounder (AIRS) on board the Aqua satellite provides the estimate of precipitable water vapor (PWV), which can be assimilated into numerical prediction models to improve precipitation forecasts. In this study, the AIRS retrieval of PWV is evaluated against ground-based GPS measurements at 24 stations over the Tibetan Plateau (TP) and its surroundings. First, the PWV estimates from the GPS delay signals at these stations are improved by applying a new scheme for computing the water-vapor-weighted mean atmosphere temperature, a key parameter in the GPS PWV retrieval. Compared with a traditional retrieval, this revision can improve the PWD estimate by up to 6% in some cases. Second, the newly retrieved PWV data are used to evaluate the AIRS product. Prior to the evaluation, an elevation correction is made to these GPS PWV data to account