Albedo variations in relation with solar altitude and transmission factor over Arabian Sea at different weather conditions

Abstract

Albedo variations with respect to different weather conditions with the observed shortwave radiation data over Arabian Sea using Pyranometer, during June to August 2002, and March -June 2003. The hourly albedo variations are analysed and presented in relation with solar altitude (SinH) and transmission factor (TF). TF classified into three groups: under clear sky (TF > 0.65), partly cloudy (0.4 < TF < 0.65) and overcast condition (TF < 0.4). As per classification, the mean albedo (TF) values are 0.07 (0.71), 0.06 (0.59) and 0.07 (0.30), respectively. The study period includes different weather conditions such as clear sky to overcast conditions and different wind conditions. During the lower wind speeds, albedo is varying between 0.01 and 0.17 and TF varied between 0.16 and 0.73. However, during higher winds (> 12 m/s), there is no significant changes observed in albedo. Variations in TF and albedo during the overcast conditions are significant, however wind also dominating.