| |
|
|
 | Acesso ao texto completo restrito à biblioteca da Embrapa Florestas. Para informações adicionais entre em contato com cnpf.biblioteca@embrapa.br. |
|
Registro Completo |
|
Biblioteca(s): |
Embrapa Florestas. |
|
Data corrente: |
26/09/2006 |
|
Data da última atualização: |
27/05/2024 |
|
Autoria: |
KUULUVANEN, T.; PUKKALA, T. |
|
Título: |
Simulation of within-tree and between-tree shading of direct radiation in a forest canopy: effect of crown shape and elevation. |
|
Ano de publicação: |
1989 |
|
Fonte/Imprenta: |
Ecological Modelling, Amsterdam, v. 49, n. 1-2, p. 89-100, 1989. |
|
Idioma: |
Inglês |
|
Conteúdo: |
The pattern of momentary within-tree and between-tree shading of foliage in direct radiation flux was simulated in fully-stocked model stands with a Poisson distribution of trees. The canopies were composed of umbrella-like (crown height/crown radius, H:R=3), average (H:R=8) or columnar (H:R=20) tree crowns. The momentary radiation-extinction probability was calculated for a large number of points (106-107 points per hectare) within the canopy. The radiation attenuation rate depended on the projected leaf-area density within the crown. At solar elevations of 50 and 450, columnar crowns had the most between-tree and the least within-tree shading, while at a high sun elevation (850) the same was true for umbrella-like crowns. At low and medium sun elevations (50 and 450), crown shape had a small effect on the total shading of foliage. At a high sun elevation, flat, horizontally extended crowns were the best illuminated, as within-tree and between-tree shadings were both low. |
|
Palavras-Chave: |
Crown; Light penetration; Simulation. |
|
Thesaurus Nal: |
canopy; dimensions; light; solar radiation. |
|
Categoria do assunto: |
-- |
|
Marc: |
null
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Florestas (CNPF) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
|
| Registros recuperados : 2 | |
| 2. |  | MAIA, M. C. C.; ALMEIDA, A. da S.; ARAUJO, L. B. de; DIAS, C. T. dos S.; OLIVEIRA, L. C. de; YOKOMIZO, G. K. I.; ROSADO, R. D. S.; CRUZ, C. D.; VASCONCELOS, L. F. L.; LIMA, P. S. da C.; MACEDO, L. M. Principal component and biplot analysis in the agro-industrial characteristics of Anacardium spp. European Scientific Journal, v. 15, n. 30, p. 21-31, Oct. 2019.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: B - 3 |
| Biblioteca(s): Embrapa Acre; Embrapa Agroindústria Tropical; Embrapa Amapá; Embrapa Meio-Norte. |
|    |
| Registros recuperados : 2 | |
|
| Expressão de busca inválida. Verifique!!! |
|
|
