RELATION BETWEEN SOLAR RADIATION INCOME AND CLOUD TYPE IN THE ARCTIC

• Main Authors: VOWINCKEL,E., ORVIG,SVENN
• Other Authors: MCGILL UNIV MONTREAL (QUEBEC)
• Format: Text
• Language: English
• Published: 1962
• Subjects: *ALBEDO; CLOUDS; INFRARED RADIATION; POLAR REGIONS; Arctic; albedo
• Online Access: http://www.dtic.mil/docs/citations/AD0274537; http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0274537

Cloud amount and duration of sunshine are generally used to estimate direct and diffuse solar radiation income at the ground, where radiation instruments are not available. This method has serious drawbacks and a consideration of cloud type is also necessary. The different elements required for the calculation of radiation income at the ground are discussed. Such calculation can give only general results, and measured values of radiation in the Arctic, with different cloud types, are presented. The magnitude is discussed, of the values in the Arctic of albedo of cloud tops, water content of clouds, ground albedo, and the effect of composite cloud types. From the results it is possible to construct tables which show the depletion factor with 10/10 cloud cover for different combinations of cloud type frequencies. (Author)