On the inclusion of long-wave radiation in a tropospheric numerical prediction model
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Authors
Danard, Maurice B.
Subjects
Tropospheric long-wave radiation
Numerical modelling
Water vapor emissivities
Cloud destabilization
Numerical modelling
Water vapor emissivities
Cloud destabilization
Advisors
Date of Issue
1968-01
Date
Publisher
Monterey, California. Naval Postgraduate School
Language
Abstract
A simple method of computing long-wave radiative cooling in the
troposphere associated with water vapor is described. Radiation from
ozone and carbon dioxide is not considered. However, Influences of
arbitrary vertical distributions of cloud and moisture are included.
Average annual cooling rates along a meridional cross-section are
calculated for a cloudless atmosphere. The results agree fairly well
with the total radiative cooling (long- and short-wave) as given by
Manabe and Möller (1961) except in the lower troposphere at low
latitudes. Here short-wave absorption by water vapor is appreciable.
Long-wave radiative cooling is also computed in a case of a
developing cyclone for comparison with release of latent heat. The
largest cooling occurs at cloud top and can be a significant fraction of
the amount of energy released as latent heat in the upper troposphere.
Destabillzatton of the cloud mass and subsequent increase in precipitation
may be important in cyclone development.
Type
Technical Report
Description
Series/Report No
Department
Meteorology and Oceanography
Organization
Identifiers
NPS Report Number
NPS-51DD8011A
Sponsors
U.S. Air Force Cambridge Research Laboratories, Research Project MIPR ES-7-967
Funder
Format
Citation
Distribution Statement
Approved for public release; distribution is unlimited.
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.