Water vapour distribution at urban scale using high-resolution numerical weather model and spaceborne SAR interferometric data
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AbstractThe local distribution of water vapour in the urban area of Rome has been studied using both a high resolution mesoscale model (MM5) and Earth Remote Sensing-1 (ERS-1) satellite radar data. Interferometric Synthetic Aperture Radar (InSAR) techniques, after the removal of all other geometric effects, estimate excess path length variation between two different SAR acquisitions (Atmospheric Phase Screen: APS). APS are strictly related to the variations of the water vapour content along the radar line of sight. To the aim of assessing the MM5 ability to reproduce the gross features of the Integrated Water Vapour (IWV) spatial distribution, as a first step ECMWF IWV has been used as benchmark against which the high resolution MM5 model and InSAR APS maps have been compared. As a following step, the high resolution IWV MM5 maps have been compared with both InSAR and surface meteorological data. The results show that the high resolution IWV model maps compare well with the InSAR ones. Support to this finding is obtained by semivariogram analysis that clearly shows good agreement beside from a model bias.
All Author(s) ListPichelli E, Ferretti R, Cimini D, Perissin D, Montopoli M, Marzano FS, Pierdicca N
Journal nameNatural Hazards and Earth System Sciences
Volume Number10
Issue Number1
PublisherEuropean Geosciences Union (EGU) / Copernicus Publications
Pages121 - 132
LanguagesEnglish-United Kingdom
Web of Science Subject CategoriesGeology; Geosciences, Multidisciplinary; GEOSCIENCES, MULTIDISCIPLINARY; Meteorology & Atmospheric Sciences; METEOROLOGY & ATMOSPHERIC SCIENCES; Water Resources; WATER RESOURCES

Last updated on 2020-04-07 at 02:53