Comparison of GPS slant wet delay measurements with model simulations during the passage of a squall line
Comparison of GPS slant wet delay measurements with model simulations during the passage of a squall line
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DOI：
10.1029/2002gl015891
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发表时间：
2002-12
影响因子：
5.2
通讯作者：
Soyoung Ha;Y. Kuo;Yong-run Guo;C. Rocken;T. Van Hove
中科院分区：
文献类型：
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作者：
Soyoung Ha;Y. Kuo;Yong-run Guo;C. Rocken;T. Van Hove
来自地面GPS观测网的倾斜湿延迟（SWD）测量为中尺度分析提供了准确、高分辨率的湿度信息。在这项研究中，我们比较了在一次锋面飑线事件中由9公里MM5模式模拟的SWD与NOAA GPS网络的实际GPS SWD观测结果。我们发现，模式模拟没有捕捉到与飑线相关的倾斜湿延迟的非各向同性分量的突然湿度变化和小尺度变化。这一结果表明，SWD测量在改进模型水分分析方面非常有用。
Slant wet delay (SWD) measurements from a ground‐based GPS observation network provide accurate, high‐resolution moisture information for mesoscale analysis. In this study, we compared SWD simulated from a 9‐km MM5 model in a prefrontal squall line event against actual GPS SWD observations by NOAA's GPS network. We found that the model simulation did not capture abrupt moisture changes and small‐scale variations observed in the nonisotropic component of slant wet delays associated with the squall line. This result suggests that SWD measurements can be very useful in improving model moisture analysis.