Impact of aerosol on surface reaching solar irradiance over Mohal in the northwestern Himalaya, India

摘要: Abstract The present study, for the first time during 2007, is focused to examine impact of aerosols on surface reaching solar irradiance over Mohal (31.9°N, 77.12°E, 1154 m amsl) in northwestern part Indian Himalaya. study also aims estimate shortwave aerosol radiative forcing (SWARF) and its effect regional climate. multi-wavelength radiometer (MWR) used measure optical depth (AOD) a wider spectrum, i.e. ultraviolet, visible near-infrared. AOD obtained by analyzing data from MWR following Langley technique. transfer model along with Optical Properties Aerosols Clouds SWARF. Aerosol shows great efficiency reduce substantial fraction energy direct beam, 154 W m −2  μm −1 per unit at 0.5 μm. SWARF surface, top atmosphere estimated be −18.5±1.7, +0.6±3.7 +19.1±3.1 W m , respectively. large stood summer (April–July), while small monsoon (August–September). Moderate autumn (October–November) winter (December–March). estimates notable extinction incoming radiation relatively lower atmospheric heating 0.41 0.73 K day . potential found higher high loading days. On these days, increases factor 1.8 (during dust events) 1.7 biomass burning). This concludes that produce significant reduction increase heating, leading remarkable stability. In addition, as subject future interest, has important implications circulation