| Full text | |
| Author(s): |
Kruk, Nadiane Smaha
[1]
;
Vendrame, Iria Fernades
[1]
;
da Rocha, Humberto Ribeiro
[2]
;
Chou, Sin Chan
[3]
;
Cabral, Osvaldo
[4]
Total Authors: 5
|
| Affiliation: | [1] Tech Inst Aeronaut, Sao Jose Dos Campos, SP - Brazil
[2] Univ Sao Paulo, Inst Astron Geophys & Atmospher Sci, BR-1226 Sao Paulo - Brazil
[3] Natl Inst Space Res, Ctr Weather Forecasting & Climate Studies, Cachoeira Paulista, SP - Brazil
[4] Embrapa Environm, Jaguariuna, SP - Brazil
Total Affiliations: 4
|
| Document type: | Journal article |
| Source: | THEORETICAL AND APPLIED CLIMATOLOGY; v. 99, n. 1-2, p. 115-123, JAN 2010. |
| Web of Science Citations: | 14 |
| Abstract | |
The accurate estimate of the surface longwave fluxes contribution is important for the calculation of the surface radiation budget, which in turn controls all the components of the surface energy budget, such as evaporation and the sensible heat fluxes. This study evaluates the performance of the various downward longwave radiation parameterizations for clear and all-sky days applied to the Sertozinho region in So Paulo, Brazil. Equations have been adjusted to the observations of longwave radiation. The adjusted equations were evaluated for every hour throughout the day and the results showed good fits for most of the day, except near dawn and sunset, followed by nighttime. The seasonal variation was studied by comparing the dry period against the rainy period in the dataset. The least square linear regressions resulted in coefficients equal to the coefficients found for the complete period, both in the dry period and in the rainy period. It is expected that the best fit equation to the observed data for this site be used to produce estimates in other regions of the State of So Paulo, where such information is not available. (AU) | |
| FAPESP's process: | 02/09289-9 - Biosphere-atmosphere interaction - Phase 2: cerrados and land use changes |
| Grantee: | Humberto Ribeiro da Rocha |
| Support Opportunities: | BIOTA-FAPESP Program - Thematic Grants |