Upper tropospheric relative humidity from the GOES 6.7 μm channel

method and climatology for July 1987

Brian J Soden, F. P. Bretherton

Research output: Contribution to journalArticle

203 Citations (Scopus)

Abstract

The 6.7-μm channel is located near the center of a strong water vapor absorption band and under clear sky conditions is primarily sensitive to the relative humidity averaged over a depth of atmosphere extending from 200 to 500 mbar. Estimates of the clear sky radiance at 6.7-μm are obtained by utilizing the local spatial structure of the radiance field at 11-μm and the correlation between 11-μm and 6.7-μm, to discriminate between clear and cloudy pixels. This approach is demonstrated to be more reliable than cloud clearance based solely upon the local spatial structure of the 6.7-μm channel alone and provides estimates of the clear sky 6.7-μm brightness temperature for areas 2° × 2° of latitude and longitude which are repeatable from successive images 30 min apart to within approximately 1 K. To facilitate the interpretation of the clear sky brightness temperatures, a simplified model of the radiative transfer at 6.7-μm is presented. -from Authors

Original languageEnglish (US)
JournalJournal of Geophysical Research
Volume98
Issue numberD9
StatePublished - 1993
Externally publishedYes

Fingerprint

Climatology
climatology
GOES
clear sky
sky
humidity
relative humidity
Luminance
Atmospheric humidity
brightness temperature
radiance
Radiative transfer
Steam
sky brightness
Absorption spectra
Pixels
clearances
estimates
longitude
Temperature

ASJC Scopus subject areas

  • Earth and Planetary Sciences(all)
  • Environmental Science(all)

Cite this

Upper tropospheric relative humidity from the GOES 6.7 μm channel : method and climatology for July 1987. / Soden, Brian J; Bretherton, F. P.

In: Journal of Geophysical Research, Vol. 98, No. D9, 1993.

Research output: Contribution to journalArticle

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