Retrospective analyses or reanalyses correct this fault by using a modern data assimilation system to assimilate all available historical observations to generate homogeneous time series of the state of the atmopshere that allow one to place current events in a longer-term context43.
Derber, J. & Rosati, A. A global oceanic data assimilation system.
Rodell, M. et al. The global land data assimilation system.
Dee et al. The ERA-Interim reanalysis: configuration and performance of the data assimilation system.
Dee, D. P. et al. The ERA-Interim reanalysis: configuration and performance of the data assimilation system.
Dee, D. P. et al. The ERA-Interim reanalysis: Configuration and performance of the data assimilation system.
Dee, D. P. et al. The ERA‐Interim reanalysis: configuration and performance of the data assimilation system.
Behringer, D. W., and Y. Xue, 2004: Evaluation of the global ocean data assimilation system at NCEP: The Pacific Ocean.
A data assimilation system for ozone observations has been developed at NASA's Goddard Space Flight Center.
mc6190 Intrinsic MSL pressure Pressure from NOAA NCEP-NCAR CDAS-1: Climate Data Assimilation System I; NCEP-NCAR Reanalysis Project.
Fox, D. N., Teague, W. J., Barron, C. N., Carnes, M. R. & Lee, C. M. The modular ocean data assimilation system (MODAS).
