Implemented:
03 June 2008
Datasets affected
ENS
Limited wave model area
Resolution
LAW
Horizontal
Vertical
Atmospheric (unchanged)
HRES: T
L
799
ENS: Leg A T
L
399
Wave
HRES: 0.25 degrees
ENS: 0.5 degrees
LAW: 0.1 degrees
(was 0.25)
Atmospheric (unchanged)
HRES: L91
ENS: L62
Meteorological content
Improved moist physics in tangent linear/ adjoint model used in 4D- Var assimilation.
Re-tuned entrainment in convection scheme.
Bug fix to scaling of freezing term in convection scheme.
Additional shear term in diffusion coefficient of vertical diffusion.
Increased turbulent orographic form drag.
Fix for soil temperature analysis in areas with 100% snow cover.
Change in surface roughness for momentum, and change in post-processing of two-metre temperature and specific humidity.
Assimilation of AMSR-E and TMI radiances in 1D+4D-Var; assimilation OMI ozone data.
Usage of all four wind solutions for QuikSCAT in assimilation, rather than only two previously.
Extended coverage and increased resolution for the limited area wave model.
Improved shallow water physics and modified advection scheme for ocean wave models.
Introduction of two new wave model parameters: maximum wave height and corresponding wave period.
Evaluation
modest but significant positive impact on northern hemisphere and European scores in the troposphere
similar results were obtained for three weeks of ENS testing
Technical content
Model ID and experiment number
Atmospheric:
132
Ocean wave: 117
Limited-area ocean wave: 217
E-suite experiment number = 0037
Resources
ECMWF Newsletter:
See Newsletter 116
Scorecard(s):
modest but significant positive impact on northern hemisphere and European scores in the troposphere
similar results were obtained for three weeks of ENS testing
Forecast User Guide
Detailed IFS documentation for Cycle 33r1