Estimation of Heat Energy Exchange Between Land and Air from MODIS Data in Poyang Lake of Jiangxi Province

Abstract

This paper focuses on the estimation of heat energy exchange between land and air using MODIS data in Poyang Lake area of Jiangxi Province. Based on energy balance equation, net radiation including net longwave and shortwave radiation, sensible heat flux, latent heat flux and ground heat flux are the major components of energy balance. In this paper, the net longwave radiation, net shortwave radiation, sensible heat flux, and latent heat flux were derived from MODIS data and the in situ data obtained from local meteorological stations because the ground heat flux is very small and can be neglected. By means of comparing our derived parameters with the in situ data collected from the local observation station, the longwave radiation, shortwave radiation and net radiation made a good accuracy, but the latent heat flux and sensible heat flux were not agreement with the in situ data which might be caused by the unstable atmosphere status. Research on the heat energy exchange is helpful for the people working on environmental, hydrology and ecology research in Poyang Lake area of Jiangxi Province.