| Journal: | Revista brasileira de geofisica |
| Database: | PERIÓDICA |
| System number: | 000338451 |
| ISSN: | 0102-261X |
| Authors: | Correa, Marcelo de Paula1 Ceballos, Juan Carlos2 |
| Institutions: | 1Universidade Federal de Itajuba, Instituto de Recursos Naturais, Itajuba, Minas Gerais. Brasil 2Instituto Nacional de Pesquisas Espaciais, Centro de Previsao de Tempo e Estudos Climaticos, Cachoeira Paulista, Sao Paulo. Brasil |
| Year: | 2008 |
| Season: | Oct-Dic |
| Volumen: | 26 |
| Number: | 4 |
| Pages: | 411-416 |
| Country: | Brasil |
| Language: | Portugués |
| Document type: | Artículo |
| Approach: | Analítico, teórico |
| English abstract | This work describes ultraviolet-B albedo measurements performed over several surfaces and different atmospheric conditions. These results provide a complement to previous studies as Blumthaler & Ambach (1988), widely used as albedo reference for the main UV radiative transfer models. A custom-built albedometer composed of a pair of Solarlight UVB501 biometer was used to measure the albedo over the following surfaces: green and yellowish grass, sand, wood (natural and painted), formica (synthetic plate), and iron. Influence of clouds and the sensor’s response to temperature variations are also discussed. Presence of clouds on surface albedo measurement seems negligible, but a thermo-regulated instrument is indispensable to an accurate analysis. Comparison with previous works shows the need for studies on the detailed characterization of the type of surface |
| Portuguese abstract | Este trabalho apresenta medidas de albedo UVB realizadas sobre diferentes tipos de superfıcie e condicoes atmosfericas. Tais resultados fornecem uma contribuicao a trabalhos previos, tais como Blumthaler & Ambach (1988) amplamente utilizado em modelos de transferencia radiativa. Para tanto, um albedometro foi construıdo a partir de dois biometros Solarlight UVB501 e as medidas foram realizadas sobre as seguintes superfıcies: grama verde e amarelada, areia, madeira (natural e pintada), formica e metal |
| Disciplines: | Geociencias |
| Keyword: | Ciencias de la atmósfera, Geofísica, Albedo, UV, Radiación, Transferencia, Modelos |
| Keyword: | Earth sciences, Atmospheric sciences, Geophysics, Albedo, UV, Radiation, Transference, Models |
| Full text: | Texto completo (Ver PDF) |
