2.1 Land Surface Temperature (LST)
Land Surface Temperature is the radiative skin temperature of the land surface of land surface processes from local through global scales or it can be defined as an average temperature of features of the exact surface of the Earth calculated from measured radiance. It is a fundamental property of the Earth’s surface that can be determined remotely. Most of the papers uses the term land surface temperature and air temperature interchangeably, however these two terms are not the same or can’t be used interchangeably. Because LST is a mixture of bare soil and vegetation temperatures. As a result, both respond rapidly to changes in incoming solar radiation due to cloud cover and aerosol load modifications and diurnal variation of illumination (Norman and Becker, 1995 and Denis et al., 2015). …show more content…
Whereas at a reasonable scales, temperature images are used to identify heat sources or hot spots in fighting fires and they are also important for monitoring the seasonal onset of melting and freezing conditions in the Arctic. The importance of LST is being increasingly recognized and displays quick variations. Land surface temperature determines the surface air temperature because, it influences the partition of energy between vegetation and ground. The land surface temperature estimation process depends on various factors such as: albedo, the vegetation cover and the soil moisture and other atmospheric factors can fundamentally influence the derivation of LST including:
temperature variations with angles
sub-pixel in-homogeneities in temperature and cove
surface spectral emissivity at the channel wavelengths
atmospheric temperature and humidity variations
Clouds and large aerosol particles such as
Land Surface Temperature is the radiative skin temperature of the land surface of land surface processes from local through global scales or it can be defined as an average temperature of features of the exact surface of the Earth calculated from measured radiance. It is a fundamental property of the Earth’s surface that can be determined remotely. Most of the papers uses the term land surface temperature and air temperature interchangeably, however these two terms are not the same or can’t be used interchangeably. Because LST is a mixture of bare soil and vegetation temperatures. As a result, both respond rapidly to changes in incoming solar radiation due to cloud cover and aerosol load modifications and diurnal variation of illumination (Norman and Becker, 1995 and Denis et al., 2015). …show more content…
Whereas at a reasonable scales, temperature images are used to identify heat sources or hot spots in fighting fires and they are also important for monitoring the seasonal onset of melting and freezing conditions in the Arctic. The importance of LST is being increasingly recognized and displays quick variations. Land surface temperature determines the surface air temperature because, it influences the partition of energy between vegetation and ground. The land surface temperature estimation process depends on various factors such as: albedo, the vegetation cover and the soil moisture and other atmospheric factors can fundamentally influence the derivation of LST including:
temperature variations with angles
sub-pixel in-homogeneities in temperature and cove
surface spectral emissivity at the channel wavelengths
atmospheric temperature and humidity variations
Clouds and large aerosol particles such as