Annual Cycles of Surface Shortwave Radiative FluxesSource: Journal of Climate:;2006:;volume( 019 ):;issue: 004::page 535DOI: 10.1175/JCLI3625.1Publisher: American Meteorological Society
Abstract: The annual cycles of surface shortwave flux are investigated using the 8-yr dataset of the surface radiation budget (SRB) components for the period July 1983?June 1991. These components include the downward, upward, and net shortwave radiant fluxes at the earth's surface. The seasonal cycles are quantified in terms of principal components that describe the temporal variations and empirical orthogonal functions (EOFs) that describe the spatial patterns. The major part of the variation is simply due to the variation of the insolation at the top of the atmosphere, especially for the first term, which describes 92.4% of the variance for the downward shortwave flux. However, for the second term, which describes 4.1% of the variance, the effect of clouds is quite important and the effect of clouds dominates the third term, which describes 2.4% of the variance. To a large degree the second and third terms are due to the response of clouds to the annual cycle of solar forcing. For net shortwave flux at the surface, similar variances are described by each term. The regional values of the EOFs are related to climate classes, thereby defining the range of annual cycles of shortwave radiation for each climate class.
|
Collections
Show full item record
contributor author | Wilber, Anne C. | |
contributor author | Smith, G. Louis | |
contributor author | Gupta, Shashi K. | |
contributor author | Stackhouse, Paul W. | |
date accessioned | 2017-06-09T17:01:24Z | |
date available | 2017-06-09T17:01:24Z | |
date copyright | 2006/02/01 | |
date issued | 2006 | |
identifier issn | 0894-8755 | |
identifier other | ams-78097.pdf | |
identifier uri | http://onlinelibrary.yabesh.ir/handle/yetl/4220728 | |
description abstract | The annual cycles of surface shortwave flux are investigated using the 8-yr dataset of the surface radiation budget (SRB) components for the period July 1983?June 1991. These components include the downward, upward, and net shortwave radiant fluxes at the earth's surface. The seasonal cycles are quantified in terms of principal components that describe the temporal variations and empirical orthogonal functions (EOFs) that describe the spatial patterns. The major part of the variation is simply due to the variation of the insolation at the top of the atmosphere, especially for the first term, which describes 92.4% of the variance for the downward shortwave flux. However, for the second term, which describes 4.1% of the variance, the effect of clouds is quite important and the effect of clouds dominates the third term, which describes 2.4% of the variance. To a large degree the second and third terms are due to the response of clouds to the annual cycle of solar forcing. For net shortwave flux at the surface, similar variances are described by each term. The regional values of the EOFs are related to climate classes, thereby defining the range of annual cycles of shortwave radiation for each climate class. | |
publisher | American Meteorological Society | |
title | Annual Cycles of Surface Shortwave Radiative Fluxes | |
type | Journal Paper | |
journal volume | 19 | |
journal issue | 4 | |
journal title | Journal of Climate | |
identifier doi | 10.1175/JCLI3625.1 | |
journal fristpage | 535 | |
journal lastpage | 547 | |
tree | Journal of Climate:;2006:;volume( 019 ):;issue: 004 | |
contenttype | Fulltext |