The assimilation of surface temperature is carried out twice a day (corresponding to the AM and PM overpass of the NOAA10) over the Red- Arkansas basin in the Southwestern United States (31 deg 50 min N - 36 deg N, 94 deg 30 min W - 104 deg 30 min W) for a period of one year (August 1987 to July 1988). Comparisons between the model computed and satellite observed surface temperatures have been carried out.
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This paper examines the utilization of surface temperature as a variable to be assimilated in offline land surface hydrological models. Surface Temperature Assimilation in Land Surface Models The statistical errors (sigma) of the estimated daily maximum (minimum) air temperature is about 3.8 C(3.7 C).
Based on linear regression relationship between surface air temperature and MODIS land surface temperature, surface maximum and minimum air temperatures are estimated from 1km MODIS land surface temperature under clear sky conditions. The relationships between the maximum air temperature and daytime land surface temperature depends significantly on land surface types and vegetation index, but the minimum air temperature and nighttime land surface temperature has little dependence on the surface conditions. Results indicate that the relationships between surface air temperature and remotely sensed land surface temperature are statistically significant. Studies were conducted for both MODIS-Terra and MODIS-Aqua by using year 2009 data. This is a preliminary study to examine statistical relationships between ground meteorological station measured surface daily maximum/minimum air temperature and satellite remotely sensed land surface temperature from MODIS over the dry and semiarid regions of northern China.
It is a very important variable in agricultural applications and climate change studies. Surface air temperature is a critical variable to describe the energy and water cycle of the Earth-atmosphere system and is a key input element for hydrology and land surface models. Estimation of Surface Air Temperature from MODIS 1km Resolution Land Surface Temperature Over Northern China
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