Comparison of MM5 integrated water vapor with microwave radiometer, GPS, and radiosonde measurements

Memmo, A.; Fionda, E.; Paolucci, T.; Cimini, Domenico; Ferretti, Rossella; Bonafoni, Stefania; Ciotti, P.

doi:10.1109/tgrs.2004.841488

Cited by 31 publications

(20 citation statements)

References 20 publications

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“…According to earlier studies (Memmo et al 2005;Posada et al 2013), the PWV from the MM5 model was in good agreement with those measured by radiosondes, GPS, and ground-based microwave radiometers. Therefore, the MM5 model over the Bohai Sea, which has three nested grid domains using Lambert's conformal projection to obtain the highest resolution, was used to validate our ship-borne GPS AWV results.…”

Section: Experiments Descriptionsupporting

confidence: 80%

Validation of Atmospheric Water Vapor Derived from Ship-Borne GPS Measurements in the Chinese Bohai Sea

Fan¹,

Zang²,

Peng³

et al. 2016

Terr. Atmos. Ocean. Sci.

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Atmospheric water vapor (AWV) was investigated for the first time in the Chinese Bohai Sea using a Global Positioning System (GPS) receiver aboard a lightweight (300-ton) ship. An experiment was conducted to retrieve the AWV using the state-of-the-art GPS precise point positioning (PPP) technique. The effects of atmospheric weighted mean temperature model and zenith wet delay constraint on GPS AWV estimates were discussed in the PPP estimation system. The GPS-derived precipitable water vapor (PWV) and slant-path water vapor (SWV) were assessed by comparing with those derived from the Fifth Generation NCAR/Penn State Mesoscale Model (MM5). The results showed the PWV and SWV differences between those derived from both GPS and MM5 are 1.5 mm root mean square (RMS) with a bias of 0.2 and 3.9 mm RMS with a bias of -0.7 mm respectively. These good agreements indicate that the GPS-derived AWV in dynamic environments has a comparable accuracy with that of the MM5 model. This suggests that high accuracy and high spatio-temporal resolution humidity fields can be obtained using GPS in the Chinese Bohai Sea, which offers significant potential for meteorological applications and climate studies in this region.

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Section: Experiments Descriptionsupporting

confidence: 80%

Validation of Atmospheric Water Vapor Derived from Ship-Borne GPS Measurements in the Chinese Bohai Sea

Fan¹,

Zang²,

Peng³

et al. 2016

Terr. Atmos. Ocean. Sci.

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show abstract

“…As it was presented in previous studies using high temporal resolution measurement data, the total column water vapor has a typical diurnal cycle (e.g., Güldner and Spän-kuch, 1999;Bouma and Stoew, 2001;Tomassini et al, 2002;Memmo et al, 2005). Its amplitude depends on the location (inland or sea site, geographical latitude) and on the season of the year.…”

Section: Diurnal Variability Of Iwvmentioning

confidence: 86%

Estimation of vertically integrated water vapor in Hungary using MODIS imagery

Kern

Bartholy

Borbás

et al. 2008

Advances in Space Research

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“…Finally, many studies are devoted to comparisons of GPS and MW IWV measurements (van Baelen et al, 2005;Memmo et al, 2005;Morland et al, 2006;Buehler et al, 2012;Steinke et al, 2015;Roman et al, 2016). Mean differences between the GPS and MW methods vary from −2.63 to 1.36 mm with SDs up to 3.69 mm.…”

Section: Discussionmentioning

confidence: 99%

Quality assessment of integrated water vapour measurements at the St. Petersburg site, Russia: FTIR vs. MW and GPS techniques

et al. 2017

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Abstract. The cross-comparison of different techniques for atmospheric integrated water vapour (IWV) measurements is the essential part of their quality assessment protocol. We inter-compare the synchronised data sets of IWV values measured by the Bruker 125 HR Fourier-transform infrared spectrometer (FTIR), RPG-HATPRO microwave radiometer (MW), and Novatel ProPak-V3 global navigation satellite system receiver (GPS) at the St. Petersburg site between August 2014 and October 2016. As the result of accurate spatial and temporal matching of different IWV measurements, all three techniques agree well with each other except for small IWV values. We show that GPS and MW data quality depends on the atmospheric conditions; in dry atmosphere (IWV smaller than 6 mm), these techniques are less reliable at the St. Petersburg site than the FTIR method. We evaluate the upper bound of statistical measurement errors for clear-sky conditions as 0.29 ± 0.02 mm (1.6 ± 0.3 %), 0.55 ± 0.02 mm (4.7 ± 0.4 %), and 0.76 ± 0.04 mm (6.3 ± 0.8 %) for FTIR, GPS, and MW methods, respectively. We propose the use of FTIR as a reference method under clear-sky conditions since it is reliable on all scales of IWV variability.

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Comparison of MM5 integrated water vapor with microwave radiometer, GPS, and radiosonde measurements

Cited by 31 publications

References 20 publications

Validation of Atmospheric Water Vapor Derived from Ship-Borne GPS Measurements in the Chinese Bohai Sea

Validation of Atmospheric Water Vapor Derived from Ship-Borne GPS Measurements in the Chinese Bohai Sea

Estimation of vertically integrated water vapor in Hungary using MODIS imagery

Quality assessment of integrated water vapour measurements at the St. Petersburg site, Russia: FTIR vs. MW and GPS techniques

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