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Registro Completo |
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Biblioteca(s): |
Embrapa Cerrados. |
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Data corrente: |
16/01/1996 |
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Data da última atualização: |
21/03/2025 |
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Autoria: |
GUO, Y.; SCHUEPP, P. H. |
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Afiliação: |
YA GUO, MCGILL UNIVERSITY; PETER H. SCHUEPP, MCGILL UNIVERSITY. |
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Título: |
An analysis of the effect of local heat advection on evaporation over wet and dry surface strips. |
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Ano de publicação: |
1994 |
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Fonte/Imprenta: |
Journal of Climate, v. 7, n. 5, p. 641-652, 1994. |
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Idioma: |
Inglês |
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Conteúdo: |
The effect of local advection on evaporation and Bowen ratio over alternating crosswind infinite dry-warm and wet-cool surface strips (patches), by redistribution of surface heat, is analysed. The analysis shows that evaporation over the region is enhanced by local advection, as observed experimentally by other researchers.Results suggest that evaporation can be enhanced more than 10% or 20% by local advection on the area covered by patches smaller than 10tu d m or 5tud m, respectively, where tu is a unit time and d the mean wind velocity in the internal boundary layer. This means that the traditional first-order approximation of surface energy balance, without considering local advection, might lead to significant error for such small-scale inhomogeneity. It may, however, be applicable to large patches ()10tu d m, where energy partition may then be directly approximated from area-weighted averages of properties derived from extended wet and dry surfaces, according to the patchy area fractions involved. |
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Palavras-Chave: |
Efeito de advecção. |
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Thesagro: |
Análise do Solo; Evaporação. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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Marc: |
LEADER 01535naa a2200169 a 4500
001 1556290
005 2025-03-21
008 1994 bl uuuu u00u1 u #d
100 1 $aGUO, Y.
245 $aAn analysis of the effect of local heat advection on evaporation over wet and dry surface strips.$h[electronic resource]
260 $c1994
520 $aThe effect of local advection on evaporation and Bowen ratio over alternating crosswind infinite dry-warm and wet-cool surface strips (patches), by redistribution of surface heat, is analysed. The analysis shows that evaporation over the region is enhanced by local advection, as observed experimentally by other researchers.Results suggest that evaporation can be enhanced more than 10% or 20% by local advection on the area covered by patches smaller than 10tu d m or 5tud m, respectively, where tu is a unit time and d the mean wind velocity in the internal boundary layer. This means that the traditional first-order approximation of surface energy balance, without considering local advection, might lead to significant error for such small-scale inhomogeneity. It may, however, be applicable to large patches ()10tu d m, where energy partition may then be directly approximated from area-weighted averages of properties derived from extended wet and dry surfaces, according to the patchy area fractions involved.
650 $aAnálise do Solo
650 $aEvaporação
653 $aEfeito de advecção
700 1 $aSCHUEPP, P. H.
773 $tJournal of Climate$gv. 7, n. 5, p. 641-652, 1994.
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