Cycle 22r1 summary of changes

 11 April 2000 Introduction of Cy22r1. This new version of the model is a minor upgrade including:

1. a revised use of SSM/I radiance including a bias correction and preventing the assimilation of radiances where precipitation occurs; both satellites (DMSP-13 and 14) are now used;

2. a modification of the assimilation of humidity in the stratosphere that was moistening unrealistically since the last model change (12 October 1999);

3. use of coastal ship and buoy winds in the extratropical Southern Hemisphere;

4. relaxed quality control of dropsondes

5. implementation of Full-Pos


Cycle changes

Please note

Prior to 2006 information on cycle upgrades has been migrated from the old website to the new website "as is". The information has not been reviewed during the migration.