BibTeX
@ARTICLE{
         Hu2007AWC,
       title = "A Weak-Constraint-Based Data Assimilation Scheme for Estimating Surface Turbulent
         Fluxes",
       author = "Jun Qin Shunlin Liang Ronggao Liu Hao Zhang Bo Hu",
       year = "2007",
       journal = "Geoscience and Remote Sensing Letters, IEEE",
       volume = "4",
       pages = "649--653",
       abstract = "Much attention has been focused on the assimilation of satellite data and products
         into land surface processes. In this letter, a variational data assimilation scheme is developed
         based on the weak-constraint concept. It assimilates surface skin temperature into a simple land
         surface model for the estimation of turbulent fluxes. An automatic differentiation technique is used
         to derive the adjoint codes to evaluate the gradient of the cost function. After the construction of
         this assimilation system, numerical experiments are conducted to test its performance with different
         model errors, and the comparison is also made with the strong constraint scheme. The results show
         that the land surface turbulent fluxes can be retrieved with highly satisfactory accuracy."
}