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- Title
Surface-Absorbed and Top-of-Atmosphere Radiation Fluxes for the Mackenzie River Basin from Satellite Observations and a Regional Climate Model and an Evaluation of the Model.
- Authors
Song Guo; Leighton, Henry; MacKay, Murray
- Abstract
Both the earth-reflected shortwave and outgoing longwave radiation (OLR) fluxes at the top of the atmosphere (TOA) as well as surface-absorbed solar fluxes from Canadian Regional Climate Model (CRCM) simulations of the Mackenzie River Basin for the period March 2000 to September 2003 are compared with the radiation fluxes deduced from satellite observations. The differences between the model and satellite solar fluxes at the TOA and at the surface, which are used in this paper to evaluate the CRCM performance, have opposite biases under clear skies and overcast conditions, suggesting that the surface albedo is underestimated while cloud albedo is overestimated. The slightly larger differences between the model and satellite fluxes at the surface compared to those at the TOA indicate the existence of a small positive atmospheric absorption bias in the model. The persistent overestimation of TOA reflected solar fluxes and underestimation of the surface-absorbed solar fluxes by the CRCM under all sky conditions are consistent with the overestimation of cloud fraction by the CRCM...
- Subjects
MACKENZIE River (N.W.T.); NORTHWEST Territories; ATMOSPHERIC radiation; WATERSHEDS; SATELLITE meteorology; ELECTROMAGNETIC waves
- Publication
Atmosphere - Ocean (Canadian Meteorological & Oceanographic Society), 2007, Vol 45, Issue 3, p129
- ISSN
0705-5900
- Publication type
Article
- DOI
10.3137/ao.450301