Is There Really a Closure Gap Between 183.31-GHz Satellite Passive Microwave and In Situ Radiosonde Water Vapor Measurements?

We present a new closure study between radiosonde and microwave satellite humidity measurements. The radiosonde data are from the Global Climate Observing System Reference Upper-Air Network. The satellite data are from the radiometers: MHS, Advanced Technology Microwave Sounder, and Sondeur Atmosphé...

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Bibliographic Details
Published in:IEEE transactions on geoscience and remote sensing 2018-05, Vol.56 (5), p.2904-2910
Main Authors: Bobryshev, Oleksandr, Buehler, Stefan A., John, Viju O., Brath, Manfred, Brogniez, Helene
Format: Article
Language:English
Subjects:
Atmospheric and Oceanic Physics
Atmospheric measurements
Data
Earth Sciences
Error analysis
Humidity measurement
Intercomparison
Meteorology
Microwave FET integrated circuits
Microwave imagery
Microwave imaging
Microwave measurement
microwave measurements
Microwave radiometry
Microwave theory and techniques
Physics
Radiometers
Radiosondes
remote sensing
Satellite broadcasting
Satellites
Sciences of the Universe
Water vapor
Water vapour
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Summary:We present a new closure study between radiosonde and microwave satellite humidity measurements. The radiosonde data are from the Global Climate Observing System Reference Upper-Air Network. The satellite data are from the radiometers: MHS, Advanced Technology Microwave Sounder, and Sondeur Atmosphérique du Profil d'Humidité Intertropicale par Radiométrie. Like previous studies, we find the satellite data to be "colder" than simulated radiosonde data. But the mean bias value (0.4 K) is smaller than previously reported and, according to our analysis, not significant. The error budget suggests an uncertainty of 0.52-1.06 K. We also show that the improvement in closure can be attributed to improvements in the intercomparison methodology.
ISSN:0196-2892
1558-0644
DOI:10.1109/TGRS.2017.2786548