| Popis: |
Distribution of solar radiation over South America is daily assessed by the CPTEC’s GL1.2 model using GOES satellite imagery (VIS channel). A time series of 11 years, January 1996 to Dezember 2006 is now available and may be used for climatological, agricultural and energy‐source studies in the scale of 1 day, 0.04°. A compact version (averages over 0.4° and five‐day intervals) is available for download. Comparison with values provided by several solarimetric stations exhibits fair fitting (about 7% or less for monthly averages). This resolution allows for an acceptable detail of geographical distribution. Comparison of annual cycles for 5 and 11 years suggest that both periods have similar behavior within one standard deviation expected for each average pentad, so that the 11‐year series can be used for preliminary climatic studies. |
