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by Coppola, E., Sobolowski, S., Pichelli, E., Raffaele, F., Ahrens, B., Anders, I., Ban, N., Bastin, S., Belda, M., Belusic, D., Caldas-Alvarez, A., Cardoso, R. M., Davolio, S., Dobler, A., Fernandez, J., Fita, L., Fumiere, Q., Giorgi, F., Goergen, K., Güttler, I., Halenka, T., Heinzeller, D., Hodnebrog, Ø., Jacob, D., Kartsios, S., Katragkou, E., Kendon, E., Khodayar, S., Kunstmann, H., Knist, S., Lavín-Gullón, A., Lind, P., Lorenz, T., Maraun, D., Marelle, L., van Meijgaard, E., Milovac, J., Myhre, G., Panitz, H.-J., Piazza, M., Raffa, M., Raub, T., Rockel, B., Schär, C., Sieck, K., Soares, P. M. M., Somot, S., Srnec, L., Stocchi, P., Tölle, M. H., Truhetz, H., Vautard, R., de Vries, H. and Warrach-Sagi, K.
Abstract:
A recently launched project under the auspices of the World Climate Research Program's (WCRP) Coordinated Regional Downscaling Experiments Flagship Pilot Studies program (CORDEX-FPS) is presented. This initiative aims to build first-of-its-kind ensemble climate experiments of convection permitting models to investigate present and future convective processes and related extremes over Europe and the Mediterranean. In this manuscript the rationale, scientific aims and approaches are presented along with some preliminary results from the testing phase of the project. Three test cases were selected in order to obtain a first look at the ensemble performance. The test cases covered a summertime extreme precipitation event over Austria, a fall Foehn event over the Swiss Alps and an intensively documented fall event along the Mediterranean coast. The test cases were run in both ``weather-like'' (WL, initialized just before the event in question) and ``climate'' (CM, initialized 1 month before the event) modes. Ensembles of 18--21 members, representing six different modeling systems with different physics and modelling chain options, was generated for the test cases (27 modeling teams have committed to perform the longer climate simulations). Results indicate that, when run in WL mode, the ensemble captures all three events quite well with ensemble correlation skill scores of 0.67, 0.82 and 0.91. They suggest that the more the event is driven by large-scale conditions, the closer the agreement between the ensemble members. Even in climate mode the large-scale driven events over the Swiss Alps and the Mediterranean coasts are still captured (ensemble correlation skill scores of 0.90 and 0.62, respectively), but the inter-model spread increases as expected. In the case over Mediterranean the effects of local-scale interactions between flow and orography and land--ocean contrasts are readily apparent. However, there is a much larger, though not surprising, increase in the spread for the Austrian event, which was weakly forced by the large-scale flow. Though the ensemble correlation skill score is still quite high (0.80). The preliminary results illustrate both the promise and the challenges that convection permitting modeling faces and make a strong argument for an ensemble-based approach to investigating high impact convective processes.
Reference:
Coppola, E., Sobolowski, S., Pichelli, E., Raffaele, F., Ahrens, B., Anders, I., Ban, N., Bastin, S., Belda, M., Belusic, D., Caldas-Alvarez, A., Cardoso, R. M., Davolio, S., Dobler, A., Fernandez, J., Fita, L., Fumiere, Q., Giorgi, F., Goergen, K., Güttler, I., Halenka, T., Heinzeller, D., Hodnebrog, Ø., Jacob, D., Kartsios, S., Katragkou, E., Kendon, E., Khodayar, S., Kunstmann, H., Knist, S., Lavín-Gullón, A., Lind, P., Lorenz, T., Maraun, D., Marelle, L., van Meijgaard, E., Milovac, J., Myhre, G., Panitz, H.-J., Piazza, M., Raffa, M., Raub, T., Rockel, B., Schär, C., Sieck, K., Soares, P. M. M., Somot, S., Srnec, L., Stocchi, P., Tölle, M. H., Truhetz, H., Vautard, R., de Vries, H. and Warrach-Sagi, K., 2018: A first-of-its-kind multi-model convection permitting ensemble for investigating convective phenomena over Europe and the MediterraneanClimate Dynamics.
Bibtex Entry:
@Article{Coppola2018a,
  author        = {Coppola, E. and Sobolowski, S. and Pichelli, E. and Raffaele, F. and Ahrens, B. and Anders, I. and Ban, N. and Bastin, S. and Belda, M. and Belusic, D. and Caldas-Alvarez, A. and Cardoso, R. M. and Davolio, S. and Dobler, A. and Fernandez, J. and Fita, L. and Fumiere, Q. and Giorgi, F. and Goergen, K. and G{\"u}ttler, I. and Halenka, T. and Heinzeller, D. and Hodnebrog, {\O}. and Jacob, D. and Kartsios, S. and Katragkou, E. and Kendon, E. and Khodayar, S. and Kunstmann, H. and Knist, S. and Lav{\'i}n-Gull{\'o}n, A. and Lind, P. and Lorenz, T. and Maraun, D. and Marelle, L. and van Meijgaard, E. and Milovac, J. and Myhre, G. and Panitz, H.-J. and Piazza, M. and Raffa, M. and Raub, T. and Rockel, B. and Sch{\"a}r, C. and Sieck, K. and Soares, P. M. M. and Somot, S. and Srnec, L. and Stocchi, P. and T{\"o}lle, M. H. and Truhetz, H. and Vautard, R. and de Vries, H. and Warrach-Sagi, K.},
  title         = {A first-of-its-kind multi-model convection permitting ensemble for investigating convective phenomena over Europe and the Mediterranean},
  journal       = {Climate Dynamics},
  year          = {2018},
  month         = {Nov},
  issn          = {1432-0894},
  abstract      = {A recently launched project under the auspices of the World Climate Research Program's (WCRP) Coordinated Regional Downscaling Experiments Flagship Pilot Studies program (CORDEX-FPS) is presented. This initiative aims to build first-of-its-kind ensemble climate experiments of convection permitting models to investigate present and future convective processes and related extremes over Europe and the Mediterranean. In this manuscript the rationale, scientific aims and approaches are presented along with some preliminary results from the testing phase of the project. Three test cases were selected in order to obtain a first look at the ensemble performance. The test cases covered a summertime extreme precipitation event over Austria, a fall Foehn event over the Swiss Alps and an intensively documented fall event along the Mediterranean coast. The test cases were run in both ``weather-like'' (WL, initialized just before the event in question) and ``climate'' (CM, initialized 1 month before the event) modes. Ensembles of 18--21 members, representing six different modeling systems with different physics and modelling chain options, was generated for the test cases (27 modeling teams have committed to perform the longer climate simulations). Results indicate that, when run in WL mode, the ensemble captures all three events quite well with ensemble correlation skill scores of 0.67, 0.82 and 0.91. They suggest that the more the event is driven by large-scale conditions, the closer the agreement between the ensemble members. Even in climate mode the large-scale driven events over the Swiss Alps and the Mediterranean coasts are still captured (ensemble correlation skill scores of 0.90 and 0.62, respectively), but the inter-model spread increases as expected. In the case over Mediterranean the effects of local-scale interactions between flow and orography and land--ocean contrasts are readily apparent. However, there is a much larger, though not surprising, increase in the spread for the Austrian event, which was weakly forced by the large-scale flow. Though the ensemble correlation skill score is still quite high (0.80). The preliminary results illustrate both the promise and the challenges that convection permitting modeling faces and make a strong argument for an ensemble-based approach to investigating high impact convective processes.},
  copublication = {54: 7 It, 6 No, 15 De, 4 Austria, 2 Sw, 4 Fr, 2 Czech Republic, 2 Sweden, 2 Portugal, 2 Es, 1 Argentina, 2 Cro, 2 Gr, 1 UK, 2 Nl},
  day           = {12},
  doi           = {10.1007/s00382-018-4521-8},
  keywords      = {Convection-permitting; Ensemble models; Climate applications;},
  owner         = {hymexw},
  timestamp     = {2019-01-25},
  url           = {https://doi.org/10.1007/s00382-018-4521-8},
}