Name: BoM POAMA Ensemble
The S2S database contains real-time forecasts from BoM from 1st January April 2015, and the full set of re-forecasts.
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Are there any significant changes/deviations in the operational version of the LSM from the documentation of the LSM? No
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2. How is soil moisture initialized in the forecasts? realistic
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If all model soil layers are not initialized in the same way or from the same source, please describe.
3. How is snow initialized in the forecasts? realistic
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Are snow mass, snow depth or both initialized? What about snow age, albedo, or other snow properties? Snow mass is initialized by above process. Albedo is prescribed.
4. How is soil temperature initialized in the forecasts (see above)
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If all model soil layers are not initialized in the same way or from the same source, please describe.
5. How are time-varying vegetation properties represented in the LSM? N/A
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6. What is the source of soil properties (texture, porosity, conductivity, etc.) used by the LSM? N/A
7. If the initialization of the LSM for re-forecasts deviates from the procedure for forecasts, please describe the differences. The only difference is that in realtime, the atmospheric model is nudged to the BoM NWP analyses rather than ERA-40.
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4. Model Uncertainties perturbations:
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POAMA24 uses 3 model versions (24a, 24b, 24c). There are 11 ensemble members for each version. There are only 11 initial conditions, so the same initial conditions get used by each model version. So, there are 3 control members (1 from each model) and 10 perturbed members from each model version.
The numbering is:
e00 is control for P24a and e01-e10 are perturbed members for P24a
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e22 is control for P24c and e23-32 are perturbed members for P24c.
The lead-time dependent climatologies for each model are different, so the 3 versions need to be treated separately to form anomalies before forming grand ensemble mean (and/or spread).
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