ATMOSPHERIC DATA ASSIMILATION: CURRENT DEVELOPMENTS AND COUPLING TO OTHER COMPONENTS OF THE EARTH SYSTEM

Atmospheric data assimilation has a long and distinguished history. It is central to the use of Earth Observation data in weather forecasting. However, its potential to enhance the scientific value of expensively acquired research satellite data for climate research, is only beginning to be exploited.

We are now at the threshold of an era in Earth Observation where data from all components of the Earth System will begin to be exploited using data assimilation techniques. Examples include: (1) coupling of physical and chemical processes to provide fields of stratospheric ozone which are consistent with the stratospheric dynamics, and (2) coupling of atmosphere and ocean components to provide better initial conditions for seasonal forecasting.

In this presentation, we review current developments in the assimilation of research satellite data of the atmosphere. Some of the latest developments in data assimilation involving coupling the atmosphere to the other components of the Earth System will also be discussed.