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A cautionary note o...
A cautionary note on the use of Gaussian statistics in satellite-based UTH climatologies
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- John, Viju Oommen (författare)
- Institute of Environmental Physics, University of Bremen, Bremen, Germany
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- Buehler, Stefan A. (författare)
- Institute of Environmental Physics, University of Bremen, Bremen, Germany
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- Courcoux, N. (författare)
- Institute of Environmental Physics, University of Bremen, Bremen, Germany
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(creator_code:org_t)
- 2006
- 2006
- Engelska.
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Ingår i: IEEE Geoscience and Remote Sensing Letters. - 1545-598X .- 1558-0571. ; 3:1, s. 130-134
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Abstract
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- This letter presents a cautionary note on the assumption of Gaussian behavior for upper tropospheric humidity (UTH) derived from satellite data in climatological studies, which can introduce a wet bias in the climatology. An example study using European Centre for Medium-Range Weather Forecasts reanalysis data shows that this wet bias can reach up to 6 %RH, which is significant for climatological applications. A simple Monte Carlo approach demonstrates that these differences and their link to the variability of brightness temperatures are due to a log-normal distribution of the UTH. This problem can be solved by using robust estimators such as the median instead of the arithmetic mean.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Rymd- och flygteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Aerospace Engineering (hsv//eng)
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