ANNOUNCEMENTS
The mapping of ET is a complex process, as it is dynamic in nature. The integration of ground data with space observations, is a technique to understand the micro-meteorological phenomenon with regional scale observations. The eddy covariance (EC) technique provides high-frequency, direct measurements of vertical fluxes of water vapour, heat, and carbon dioxide between the land surface and atmosphere. By capturing continuous data, EC systems offer detailed insights into the diurnal and seasonal dynamics of ET. Evapotranspiration (ET) is a critical component of the Earth's hydrological and energy cycles, representing the sum of water evaporation from land surfaces and transpiration from vegetation. Understanding ET is essential for water resource management, agricultural planning, and climate modelling. This comprehensive overview delves into the diurnal behaviour of ET across various land use and land cover (LULC) types and seasons, the role of net radiation in governing surface ET and sensible heat flux, the limitations of single-time satellite observations for daily ET estimation, and how integrating eddy covariance data and other drivers like air temperature and land surface temperature (LST) can enhance our understanding and monitoring of ET.
Keywords: Radiative Fluxes, Latent Heat, Sensible Heat, Surface Evapotranspiration, Diurnality, Land Surface Temperature, Albedo
