Accession Number : ADA268329


Title :   Spectral and Spatial Variability of Solar Irradiance in the North Atlantic


Descriptive Note : Final rept.,


Corporate Author : NAVAL RESEARCH LAB STENNIS SPACE CENTER MS


Personal Author(s) : Terrie, Gregory E ; Arnone, Robert A


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a268329.pdf


Report Date : Jan 1992


Pagination or Media Count : 15


Abstract : A model to predict the monthly solar irradiance incident at the ocean surface has been developed at seven wavelengths across the visible spectrum (390,440,490,540,590,640, and 690 nm). The model incorporates specific monthly climatological databases of aerosols, ozone, and percent cloud cover derived from satellite observation for the North Atlantic from May 1979. The variations in the spectral irradiance fields in the North Atlantic are shown to be highly spatially variable in small scales (100 km) in addition to being spectrally different. The irradiance distribution is dependent on the spectral characteristics of the transmittance parameters, and also on the small scale variability of the climatological data. The model indicates that the Raleigh and aerosol transmittance has a pronounced affect on the spectral irradiance while the magnitude of the irradiance is controlled primarily by percent cloud cover and aerosol transmittance. The general trend in the North Atlantic indicated that the spectral irradiance intensity is similar to the solar spectrum (peaking at 490-540) and diminishing in the shorter and longer wavelengths.


Descriptors :   *OCEAN SURFACE , *TRANSMITTANCE , *AIR WATER INTERACTIONS , *SOLAR RADIATION , DATA BASES , CLOUDS , PARAMETERS , INTENSITY , SCALE , SOLAR SPECTRUM , CLOUD COVER , OZONE , OCEAN MODELS , OCEANS , ARTIFICIAL SATELLITES , VARIATIONS , VARIABLES , OBSERVATION , OPTICS , AEROSOLS


Subject Categories : Astrophysics
      Meteorology
      Physical and Dynamic Oceanography


Distribution Statement : APPROVED FOR PUBLIC RELEASE