Solar radiation measurements and studies of atmospheric transmission at high altitude stations in India
Keywords:High altitude station, Direct solar radiation, aerosols, Himalayas, Kodaikanal.
Results of radiation measurements made at high altitude stations in the Himalayas and other locations in India have been studied. The values of direct solar radiation at stations in Kashmir during the pre-monsoon summer months are exceptionally low and lower than those at Kodaikanal in spite of low atmospheric humidity. Such exceptionally low values of direct solar radiation observed in Kashmir have to be attributed to the thick layer of aerosols over most of north India during the summer months. Values of atmospheric turbidity were found to be comparatively high over the Himalayas. Spectral measurements of direct solar radiation as well as global and diffuse solar radiation at the high altitude stations have been discussed.
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