contributor author | Harshvardhan | |
contributor author | Weinman, James A. | |
contributor author | Davies, Roger | |
date accessioned | 2017-06-09T14:22:40Z | |
date available | 2017-06-09T14:22:40Z | |
date copyright | 1981/11/01 | |
date issued | 1981 | |
identifier issn | 0022-4928 | |
identifier other | ams-18240.pdf | |
identifier uri | http://onlinelibrary.yabesh.ir/handle/yetl/4154224 | |
description abstract | The transport of infrared radiation in a single cuboidal cloud has been modeled using a variable azimuth two-stream (VATS) approximation. Computations have been made at 10 ?m for a Deirmendjian (1969) C-1 water cloud of single scattering albedo, ? = 0.638 and asymmetry parameter, g=0.865. Results indicate, that the emittance of the top face of the model cloud is always less than that for a plane parallel cloud of the same optical depth. The hemispheric flux escaping from the cloud top has a gradient from the censor to the edges which are warmer when the cloud is over warmer ground. Cooling rate calculations in the 8?13.6 ?m region show that there is cooling out of the sides of the cloud at all levels even when there is heating of the core from the ground below. The radiances exiting from model cuboidal clouds were computed by path integration over the source function obtained with the two-stream approximation. Results suggest that the brightness temperature measured from finite clouds will overestimate the cloud-top temperature. Some key results of the model have been compared with Monte Carlo simulations. Overall errors in flux and radiance average a few degrees for most cases. | |
publisher | American Meteorological Society | |
title | Transport of Infrared Radiation in Cuboidal Clouds | |
type | Journal Paper | |
journal volume | 38 | |
journal issue | 11 | |
journal title | Journal of the Atmospheric Sciences | |
identifier doi | 10.1175/1520-0469(1981)038<2500:TOIRIC>2.0.CO;2 | |
journal fristpage | 2500 | |
journal lastpage | 2513 | |
tree | Journal of the Atmospheric Sciences:;1981:;Volume( 038 ):;issue: 011 | |
contenttype | Fulltext | |