Evapotranspiration  (ET)  is  an  important  part  of  land surface water cycle and plays a key role in water resource management.  Because  of  economy  development  and 

climate  change,  water  resource  shortage  has  become  a looming  crisis  threatening  the  countries’  security  and social  stability.  Therefore,  understanding  the  spatial  and 

temporal  pattern  of  ET  change  in  South  Asia  has  a significant impact. In this study, time series daily ET was estimated  for  South  Asia  in  2008  by  using  MODIS  data combined with station observations and GLDAS data with SEBS energy balance model. Monthly ET estimation was calculated  based  on  daily  ET.  Spatial  and  temporal analysis was conducted to analyze the daily ET temporal change  for  different  land  cover  types  located  at  different part of South. The results showed that the temporal change 

of  rainfall  has  large  impart  on  ET  temporal  variation. Quantification of ET in South Asia also suggested that the water availability is the major limitation to the evaporation 

and transpiration processes.