Comparison of GPS slant wet delay measurements with model simulations during the passage of a squall line

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&#...

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Veröffentlicht in:	Geophysical research letters 2002-12, Vol.29 (23), p.28-1-28-4
Hauptverfasser:	Ha, So-Young, Kuo, Ying-Hwa, Guo, Yong-Run, Rocken, Chris, Van Hove, Teresa
Format:	Artikel
Sprache:	eng
Schlagworte:	GPS MM5 Precipitable water Slant wet delay (slant water vapor) Squall line
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container_end_page	28-4
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container_title	Geophysical research letters
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creator	Ha, So-Young Kuo, Ying-Hwa Guo, Yong-Run Rocken, Chris Van Hove, Teresa
description	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.
doi_str_mv	10.1029/2002GL015891
format	Article
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subjects	GPS MM5 Precipitable water Slant wet delay (slant water vapor) Squall line
title	Comparison of GPS slant wet delay measurements with model simulations during the passage of a squall line
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