11. Wind data is provided from the GDAS data assimilation system for the GFS weather model. 12. Mars is the only extraterrestrial planet to which data assimilation has been applied so far. 13. This data assimilation method is used operationally at forecast centres such as the Met Office. 14. It was designed primarily for modeling atmospheric chemistry, and in particular, for chemical data assimilation . 15. The Hessian matrix and the adjoint are required for four-dimensional variational data assimilation ( 4D-Var ). 16. This is then combined with current observations of the actual system using a data assimilation method. 17. Data quality is always an issue for chemical data assimilation , in particular the presence of biases. 18. The data assimilation technique requires data to be compared with an initial integration of a model. 19. *Earth System Modeling Framework ( ESMF ) climate, numerical weather prediction, and data assimilation applications 20. Daley was largely responsible for elevating data assimilation to be a prestigious field of scientific enquiry.
