Expanding The Met Office Data Assimilation System: Developments At The Data Assimilation Research Centre
Abstract
The Data Assimilation Research Centre (DARC) has adopted the Met Office's vari- ational data assimilation system as its principal tool to exploit novel satellite data. It is also investigating new techniques that allow the variational assimilation process to function in an efficient yet physically realistic way.
These two areas of research define part of DARC's initial research programme that will involve modifications to the Met Office's 3d-Var. system. (i) Assimilation of temperature, ozone and water vapour profiles from instruments aboard the ENVISAT satellite (due for launch in March 2002). This will be done to assess the new instruments and to produce analyses of ozone and water vapour. This is of particular value for middle atmosphere research. (ii) Use of theoretical ideas to improve the performance of the variational scheme by using potential vorticity as the leading control variable. Although the mathematical transformations needed for this are computationally more demanding than the cur- rent scheme, it is hoped that the approximations are, unlike the current scheme, valid globally. In this poster we show how the Met Office's 3d-Var. scheme works and outline how it will be adapted to advance each of the above research efforts.- Publication:
-
EGS General Assembly Conference Abstracts
- Pub Date:
- 2002
- Bibcode:
- 2002EGSGA..27..856B