Solar radiative line-by-line determination of water vapor absorption and water cloud extinction in inhomogeneous atmospheres

V. Ramaswamy, S. M. Freidenreich

Research output: Contribution to journalArticle

32 Scopus citations

Abstract

The "exact' solution of the radiative transfer equation for cloudy atmospheres with the cloud in a single model layer consumes an exorbitant amount of computational resources (~100hr on a Cyber 205). Two other techniques are based on the LBL spectral features of the H2O molecule but consist of an approximation. The technique involving the "binning' of the vapor optical depths yields extremely accurate fluxes and heating rates for both the vapor and vapor-plus-cloud cases; in particular, it is a practical alternative for obtaining benchmark solutions to the solar radiative transfer in overcast atmospheres (3.8hr). In contrast, the multiple-scattering approximation technique does not yield precise results; however, considering its computational efficiency (0.5hr), it offers a rapid means to obtain a first-order approximation of the spectrally integrated quantities. -from Authors

Original languageEnglish (US)
Pages (from-to)9133-9157
Number of pages25
JournalJournal of Geophysical Research
Volume96
Issue numberD5
DOIs
StatePublished - Jan 1 1991

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Forestry
  • Oceanography
  • Aquatic Science
  • Ecology
  • Water Science and Technology
  • Soil Science
  • Geochemistry and Petrology
  • Earth-Surface Processes
  • Atmospheric Science
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science
  • Palaeontology

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