Get 20M+ Full-Text Papers For Less Than $1.50/day. Start a 14-Day Trial for You and Your Team.

Learn More →

Observational Determination of Cloud Mass Flux Distributions

Observational Determination of Cloud Mass Flux Distributions Using Arakawa's spectral representation of cumulus convection, the cloud mass flux distributions and other cloud properties are diagnostically determined from large-scale observations. Observational data over the tropical Atlantic Ocean during the BOMEX Phase 3 (22–30 June 1969) are used. The analyzed period is subdivided into three parts according to different synoptic situations. The cloud properties and the manner of interaction between large-scale fields and cumulus convection under the different situations are examined. During the period in which a strong trade inversion lies near 800 mb, most clouds detrain below the trade inversion and cloud mass flux is confined below this level. The large apparent heat sink and apparent moisture source found near the inversion base are mainly due to the cooling and moistening effects of the detrainment from clouds. During the period affected by an upper-level extended trough, the trade inversion is weakened and some clouds penetrate through the 800-mb level but the cloud mass flux is still confined below 500 mb. During the period disturbed by an organized cloud cluster, not only small, shallow clouds but large, deep clouds make large contributions to the vertical mass flux. The total cloud mass flux extends into the upper troposphere. Approximate distributions of cloud area ratio are also estimated from the budget of cloud liquid water using a simple pararmeterization of the rainfall rate. Computed results of cloud mass flux distributions are qualitatively verified by aircraft cloud photographs and radar echo analyses. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of the Atmospheric Sciences American Meteorological Society

Observational Determination of Cloud Mass Flux Distributions

Journal of the Atmospheric Sciences , Volume 32 (1) – Oct 29, 1973

Loading next page...
 
/lp/american-meteorological-society/observational-determination-of-cloud-mass-flux-distributions-mLWPfLR48N
Publisher
American Meteorological Society
Copyright
Copyright © 1973 American Meteorological Society
ISSN
0022-4928
eISSN
1520-0469
DOI
10.1175/1520-0469(1975)032<0073:ODOCMF>2.0.CO;2
Publisher site
See Article on Publisher Site

Abstract

Using Arakawa's spectral representation of cumulus convection, the cloud mass flux distributions and other cloud properties are diagnostically determined from large-scale observations. Observational data over the tropical Atlantic Ocean during the BOMEX Phase 3 (22–30 June 1969) are used. The analyzed period is subdivided into three parts according to different synoptic situations. The cloud properties and the manner of interaction between large-scale fields and cumulus convection under the different situations are examined. During the period in which a strong trade inversion lies near 800 mb, most clouds detrain below the trade inversion and cloud mass flux is confined below this level. The large apparent heat sink and apparent moisture source found near the inversion base are mainly due to the cooling and moistening effects of the detrainment from clouds. During the period affected by an upper-level extended trough, the trade inversion is weakened and some clouds penetrate through the 800-mb level but the cloud mass flux is still confined below 500 mb. During the period disturbed by an organized cloud cluster, not only small, shallow clouds but large, deep clouds make large contributions to the vertical mass flux. The total cloud mass flux extends into the upper troposphere. Approximate distributions of cloud area ratio are also estimated from the budget of cloud liquid water using a simple pararmeterization of the rainfall rate. Computed results of cloud mass flux distributions are qualitatively verified by aircraft cloud photographs and radar echo analyses.

Journal

Journal of the Atmospheric SciencesAmerican Meteorological Society

Published: Oct 29, 1973

There are no references for this article.