Longwave Radiation Exchanges over Lake Ontario

Abstract

<p>The components of the radiation balance were measure over Lake Ontario for an 18 week period. Surface temperature and emissivity measurements were also made. Emissivity is constant, and outgoing longwave radiation can be determined from surface temperature alone. Water temperature changes appear o be greatly influenced by non-radioactive processes. The presence of flux divergence in the source layer is demonstrated. Incoming longwave radiation various rapidly in cloudless conditions. In addition, it is greatly influenced by low and medium cloud.. The relationship between net shortwave radiation and net radiation is analysed for varying time periods, and reason for the variable relationship are advanced. Several empirical methods for predicting net radiation or its components were tested, with variable results.</p>