Abstract
The interaction between the surface and the lower troposphere determines the development of fluxes close to the ground. Soil moisture is of primary importance in determining the partition of energy between surface heat fluxes, thus affecting near-surface forecasts such as air temperature and precipitation forecasts. Ensemble forecasts usually suffer from a lack of variability among their members, which is mainly prominent near the surface rather than higher in the troposphere. In the framework of the Priority Project CONSENS of COSMO consortium, a method has been developed and adapted for perturbing soil moisture initial conditions. This method is based on the identification of the variability behavior in long data sets forming the model’s initial conditions—for each grid point of the domain—and determining the different members of the Ensemble Prediction Systems (EPS). The implementation of this method aims at ameliorating the variability of the solutions of COSMO EPS forecasts near the ground by exploring its impacts on the variability of the members for different forecast parameters, namely, 2 m air temperature, heat fluxes and accumulated precipitation.
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References
Houtekamer PL (1993) Global and local skill forecasts. Mon Weather Rev 121:1834–1846. doi:10.1175/1520-0493(1993)121<1834:GALSF>2.0.CO;2
Kutzbach JE (1967) Empirical eigenvectors of sea-level pressure, surface temperature and precipitation complexes over North America. J Appl Meteorol 6:791–802. doi:10.1175/1520-0450(1967)006<0791:EEOSLP>2.0.CO;2
Marsigli C (2009) Final report on priority project SREPS (short range ensemble prediction system). COSMO Technical Report No. 13
Press WH, Teulosky SA, Vetterling WT, Flannery BP (1992) Numerical Recipes in Fortran 77, 2nd edn. Cambridge University Press, Cambridge
Sutton CJ, Hamill TM (2004) Impacts of perturbed soil moisture conditions on short-range ensemble variability. In: Proceedings of 20th conference on weather analysis and forecasting/16th conference on numerical weather prediction, Seattle. Am Meteorol Soc 22(4)
von Storch H, Hannoschock G (1984) Empirical orthogonal function analysis of wind vectors over the tropical pacific ocean. Bull Am Meteorol Soc 65:162
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Louka, P., Gofa, F., Marsigli, C., Montani, A. (2017). Development and Implementation of a Soil Moisture Perturbation Method for EPS Initial Conditions. In: Karacostas, T., Bais, A., Nastos, P. (eds) Perspectives on Atmospheric Sciences. Springer Atmospheric Sciences. Springer, Cham. https://doi.org/10.1007/978-3-319-35095-0_24
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DOI: https://doi.org/10.1007/978-3-319-35095-0_24
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