Factors controlling upper tropospheric relative humidity
نویسندگان
چکیده
منابع مشابه
A distribution law for free-tropospheric relative humidity
The probability distribution of local relative humidity R in the free troposphere is explored by comparing a simple theoretical calculation with observations from the Global Positioning System (GPS) and the Microwave Limb Sounder (MLS). The calculation is based on a parcel of air that conserves its composition during diabatic subsidence, until it is resaturated by randomly entering a convective...
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[1] A recent paper (Paltridge et al., 2009) found that specific humidity in the National Centers for Environmental Prediction/National Center for Atmospheric Research (NCEP/ NCAR) reanalysis declined between 1973 and 2007, particularly in the tropical mid and upper troposphere, the region that plays the key role in the water vapor feedback. If borne out, this result suggests potential problems ...
متن کاملComparison of AIRS and AMSU-B monthly mean estimates of upper tropospheric humidity
Satellite-borne measurements provide valuable information on the global distribution of upper tropospheric humidity (UTH), which represents the mean relative humidity in a layer approximately enclosed by the atmospheric pressure levels 500 and 200 hPa. Monthly mean distributions of microwave observations of UTH obtained from the Advanced Microwave Sounding Unit-B (AMSU-B) and the Humidity Sound...
متن کاملClear‐sky biases in satellite infrared estimates of upper tropospheric humidity and its trends
We use microwave retrievals of upper tropospheric humidity (UTH) to estimate the impact of clear-sky-only sampling by infrared instruments on the distribution, variability and trends in UTH. Our method isolates the impact of the clear-sky-only sampling, without convolving errors from other sources. On daily time scales IR-sampled UTH contains large data gaps in convectively active areas, with o...
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ژورنال
عنوان ژورنال: Annales Geophysicae
سال: 2004
ISSN: 1432-0576
DOI: 10.5194/angeo-22-705-2004