Genoemde cyclus 36r4 is 9 november geïmplementeerd:
Gr. Ben
The main changes included in this cycle are:
- Five-species prognostic microphysics scheme, introducing cloud rain water content, and cloud ice water content as new model variables.
- Retuning and simplification of convective entrainment/detrainment and land/sea dependent threshold for precipitation
- Retuning of subgrid-scale orographic gravity wave drag
- Adjustment to diffusion in stable boundary Iayers near the surface
- All-sky improvements of microwave radiance assimilation
- Adaptation to neutral wind of the observation operator for scatterometer data
- New soil-moisture analysis scheme (SEKF, simplified ensemble Kalman filter)
- New snow analysis based on 0I (Optimum Interpolation), and upgrade of NESDIS snow cover data to 4 km resolution.
- Monthly varying climatology of leaf area index (LAI) based on MODIS data
- The 4D-Var of the Early Delivery suite performs 2 rather than 3 updates of the outer loop
The impact of the new cycle on the performance of the forecasting system has been tested in research mode over the period January to July 2010, and in pre-operational runs over the period since 1 August 2010. The new cycle shows benefit in terms of objective scores in the medium range in both hemispheres, particularly in the upper troposphere. For winds, the verification against observations is generaily positive, whereas verification against analyses tends to be negative in the shorter range, which can be explained by higher variability in the analysed wind fields. The new snow analysis improves several issues that affected the analysed snow depth on the 2009/2010 winter season. Modifications to the stable boundary layer improve the diurnal cycle of 2m temperature, especially some reduction of the night-time cold bias over Europe. The tropospheric humidity analysis has significantly improved.
Gr. Ben
Gewoon foutje bij WZ 
