Electron radiation belt data assimilation with an ensemble Kalman filter relying on the Salammbô code

Autor: Vincent Maget, S. Bourdarie
Jazyk: angličtina
Rok vydání: 2018
Předmět:
Zdroj: Annales Geophysicae, Vol 30, Pp 929-943 (2012)
ISSN: 1432-0576
Popis: In this study we implement a data assimilation tool using a 3-D radiation belt model and an ensemble Kalman filter approach. High time and space reanalysis of the electron radiation belt fluxes is obtained over the time period 5 October to 25 October 1990 by combining sparse observations with the Salammbô 3-D model in an optimal way. The convergence of the ensemble Kalman filter is analyzed carefully. The risk of using a biased physical model is discussed and relative consequences are highlighted. Finally, a validation against CRRES data and major improvements compared to pure physics based model are presented.
Databáze: OpenAIRE