Números anteriores 1999 1999 Septiembre - Diciembre Estimación de evaporación y radiación solar en el valle del Yaqui Sonora usando datos de satélite
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Estimación de evaporación y radiación solar en el valle del Yaqui Sonora usando datos de satélite |
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Para calcular la evaporación potencial en el valle del Yaqui, usando la fórmula de Makkink, se utilizaron datos de dos estaciones meteorológicas automáticas. La mencionada fórmula se basa en la radiación solar incidente observada y en ciertos valores climatológicos de temperatura del aire. Se evaluó la utilidad de esta fórmula, comparándola con las de Penman-Monteith, Penman y Priestley-Taylor; así como con mediciones de radiación neta. Se desarrolló una metodología para estimar la radiación solar incidente usando la banda visible del satélite GOES. Se hizo una comparación con mediciones de dos piranómetros instalados en el valle del Yaqui, obteniéndose buenos resultados, principalmente en meses con poca nubosidad. Se utilizaron imágenes de agosto de 1993 para producir un mapa de la distribución espacial de la evaporación potencial. Palabras clave: Evaporación potencial, radiación solar, Makkink, satélites geoestacionarios, GOES. Estimate potential evaporation and solar radiation in the Yaqui Valley, Sonora, Mexico, using data from satellite The data from two automatic weather stations in the Yaqui valley were used to estimate potential evaporation using the Makkink formula, based on observed incoming solar radiation and climatological values of air temperature. The usefulness of this formula was assessed by comparison with the Penman-Monteith, Penman and Priestley-Taylor formulae and measurements of net radiation. A methodology was presented for estimating incoming solar radiation using visible band data from the GOES satellite. Comparisons against ground-based measurements from two pyranometers installed in the Yaqui valley gave good results, particularly in months with low cloud cover: Images for August 1993 were used to produce a map of the spatial distribution of potential evaporation. Key words: Potential evaporation, solar radiation. Makkink formula, geostationary satellites, GOES satellite, Yaqui valley. |
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