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1. MED-CORDEX INITIATIVE FOR MEDITERRANEAN CLIMATE STUDIES

Author

Ruti, P. M., Somot, S., Giorgi, F., Dubois, C., Flaounas, E., Obermann, A., Dell’Aquila, A., Pisacane, G., Harzallah, A., Lombardi, E., Ahrens, B., Akhtar, N., Alias, A., Arsouze, T., Aznar, R., Bastin, S., Bartholy, J., Béranger, K., Beuvier, J., Bouffies-Cloché, S., Brauch, J., Cabos, W., Calmanti, S., Calvet, J.-C., Carillo, A., Conte, D., Coppola, E., Djurdjevic, V., Drobinski, P., Elizalde-Arellano, A., Gaertner, M., Galàn, P., Gallardo, C., Gualdi, S., Goncalves, M., Jorba, O., Jordà, G., L’Heveder, B., Lebeaupin-Brossier, C., Li, L., Liguori, G., Lionello, P., Maciàs, D., Nabat, P., Önol, B., Raikovic, B., Ramage, K., Sevault, F., Sannino, G., Struglia, M. V., Sanna, A., Torma, C., and Vervatis, V.

Published
2016

2. Med-CORDEX initiative for Mediterranean climate studies

Author

Ruti, P.M. Somot, S. Giorgi, F. Dubois, C. Flaounas, E. Obermann, A. Dell'Aquila, A. Pisacane, G. Harzallah, A. Lombardi, E. Ahrens, B. Akhtar, N. Alias, A. Arsouze, T. Aznar, R. Bastin, S. Bartholy, J. Béranger, K. Beuvier, J. Bouffies-Cloché, S. Brauch, J. Cabos, W. Calmanti, S. Calvet, J.-C. Carillo, A. Conte, D. Coppola, E. Djurdjevic, V. Drobinski, P. Elizalde-Arellano, A. Gaertner, M. Galàn, P. Gallardo, C. Gualdi, S. Goncalves, M. Jorba, O. Jordà, G. L'Heveder, B. Lebeaupin-Brossier, C. Li, L. Liguori, G. Lionello, P. Maciàs, D. Nabat, P. Önol, B. Raikovic, B. Ramage, K. Sevault, F. Sannino, G. Struglia, M.V. Sanna, A. Torma, C. Vervatis, V.

Abstract

The Mediterranean is expected to be one of the most prominent and vulnerable climate change "hotspots" of the twenty-first century, and the physical mechanisms underlying this finding are still not clear. Furthermore, complex interactions and feedbacks involving ocean-atmosphere-land-biogeochemical processes play a prominent role in modulating the climate and environment of the Mediterranean region on a range of spatial and temporal scales. Therefore, it is critical to provide robust climate change information for use in vulnerability-impact-adaptation assessment studies considering the Mediterranean as a fully coupled environmental system. The Mediterranean Coordinated Regional Downscaling Experiment (Med-CORDEX) initiative aims at coordinating the Mediterranean climate modeling community toward the development of fully coupled regional climate simulations, improving all relevant components of the system from atmosphere and ocean dynamics to land surface, hydrology, and biogeochemical processes. The primary goals of Med-CORDEX are to improve understanding of past climate variability and trends and to provide more accurate and reliable future projections, assessing in a quantitative and robust way the added value of using high-resolution and coupled regional climate models. The coordination activities and the scientific outcomes of Med-CORDEX can produce an important framework to foster the development of regional Earth system models in several key regions worldwide. ©2016 American Meteorological Society.

Published
2016

4. HyMeX: mid-term program review and perspectives Report of the 9th HyMeX workshop in Mykonos, Greece

Author

Drobinski P., Ducrocq V., Kotroni V., Lagouvardos K., Ahrens B., Anquetin S., Bouin M.N., Braud I., Coppola E., Coquillat S., Davolio S., Delanoé J., Di Girolamo P., Flamant C., Flaounas E., Fourrié N., Garcia-Moya J., Giordani H., Homar V., Jorda G., Kalthoff N., Khodayar S., Llasat C., Lebeaupin-Brossier C., Michel Y., Morin E., Nuissier O., Petrucci O., Polcher J., Quintana-Segui P., Richard E., Sannino G., Somot S., Testor P., Tramblay Y., Ruin I., and Von Schuckmann K.

Subjects
climate change
Abstract

The Hydrological Cycle in the Mediterranean Experiment (HyMeX; Drobinski et al., 2014) is a 10-year (2010-2020) GEWEX Hydroclimatology Panel (GHP) Regional Hydroclimate Project (RHP). Its objectives are to: (i) improve the understanding of the water cycle, with emphasis on extreme events, by monitoring and modeling the Mediterranean coupled system (atmosphere-land-ocean), its variability (from the event scale to the seasonal and interannual scales) and characteristics over one decade in the context of global change; and (ii) evaluate societal and economical vulnerability, and adaptation capacity to extreme meteorological and climate events.

Published
2015

5. When and where are Mediterranean heavy rain events sensitive to atmosphere-ocean coupled processes?

Author

Berthou, S., Mailler, S., Drobinski, Philippe, arsouze, thomas, Bastin, Sophie, Béranger, K., Lebeaupin-Brossier, C., Laboratoire de Météorologie Dynamique (UMR 8539) (LMD), Département des Géosciences - ENS Paris, École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École des Ponts ParisTech (ENPC)-École polytechnique (X)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC), École des Ponts ParisTech (ENPC), Unité de Mécanique (UME), École Nationale Supérieure de Techniques Avancées (ENSTA Paris), SPACE - LATMOS, Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Groupe d'étude de l'atmosphère météorologique (CNRM-GAME), Institut national des sciences de l'Univers (INSU - CNRS)-Météo France-Centre National de la Recherche Scientifique (CNRS), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-École des Ponts ParisTech (ENPC)-Centre National de la Recherche Scientifique (CNRS)-Département des Géosciences - ENS Paris, École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL), Centre national de recherches météorologiques (CNRM), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), and Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS)

Subjects
[SDU.STU.ME]Sciences of the Universe [physics]/Earth Sciences/Meteorology, ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2014

6. Hymex/Med-CORDEX analysis of the Mediterranean water budget variability regarding the effects of horizontal resolution

Author

Omrani, H., Lebeaupin-Brossier, C., Drobinski, P., Bastin, Sophie, Beranger, K., Cardon, Catherine, Laboratoire de Météorologie Dynamique (UMR 8539) (LMD), Département des Géosciences - ENS Paris, École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École des Ponts ParisTech (ENPC)-École polytechnique (X)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC), SPACE - LATMOS, Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), École Nationale Supérieure de Techniques Avancées (ENSTA Paris), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-École des Ponts ParisTech (ENPC)-Centre National de la Recherche Scientifique (CNRS)-Département des Géosciences - ENS Paris, École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-École normale supérieure - Paris (ENS-PSL), and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)

Subjects
[SDU.STU.ME] Sciences of the Universe [physics]/Earth Sciences/Meteorology, [SDU.STU.ME]Sciences of the Universe [physics]/Earth Sciences/Meteorology
Published
2011

8. Ocean response in numerical mesoscale modelling during high-wind events over the Gulf of Lions

Author

Lebeaupin Brossier, C., Béranger, Karine, Philippe, Drobinski, Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN), Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)), École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Météorologie Dynamique (UMR 8539) (LMD), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-École des Ponts ParisTech (ENPC)-Centre National de la Recherche Scientifique (CNRS)-Département des Géosciences - ENS Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-École normale supérieure - Paris (ENS-PSL), and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)

Subjects
[SDU]Sciences of the Universe [physics]
Abstract

International audience; The near-sea surface meteorological conditions associated with strong wind events constitute a strong forcing on the ocean mixed layer. The Gulf of Lions is one of the most windy region of the Mediterranean basin, with frequent Mistral and Tramontane events. These northerly and north-westerly low-level flows, generally induced by a cyclogenesis in the Ligurian basin, transport cold continental air over sea and induce strong momentum and heat exchanges at the air-sea interface. The local continental shelf circulation with sometimes transient coastal upwellings is also sensitive to these intense meteorological events. A preliminary study addresses the question of the sea surface scheme used in mesoscale atmospheric numerical modelling to represent the ocean mixed layer response under these severe wind events. Several slab ocean models have been used coupled with the Weather Research and Forecasting (WRF) model at 21 and 7-km resolution and applied on two Mistral/Tramontane cases. We mainly focused on the slab models performances to represent the ocean mixed layer response under Mistral and Tramontane situations at mesoscale, i. e. local and fast cooling and deepening, and finally we investigated the feedbacks of an interactive ocean mixed layer on the atmospheric simulation. In a second experimental set, the downscaling of the NCEP reanalyses over the full Mediterranean basin has been done with the WRF model between August 1998 and July 1999. The atmospheric fields obtained are then used to drive the regional NEMO-MED12 ocean model with a 1/12° resolution in a perpetual mode. The benefit of increasing the space and time resolutions of the atmospheric forcing (20 to nearly 7 km; daily to 3-hourly) is estimated by a comparison of the ocean model performances to represent the general Mediterranean circulation as the characteristics of the mixed layer, of the deep convection and of the upwellings between the sensitivity experiments, and by a comparison of our experiments to observations and climatologies. A special focus on the local 3D circulation in the Gulf of Lions under high-wind events in these simulations will be presented during the conference.

Published
2010

9. A 20-year (1989-2008) WRF/med-CORDEX simulation : validation and preliminary analysis

Author

Bastin, Sophie, Omrani, H., Drobinski, P., Rodriguez, Delphy, Lebeaupin-Brossier, C., SPACE - LATMOS, Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Météorologie Dynamique (UMR 8539) (LMD), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-École des Ponts ParisTech (ENPC)-Centre National de la Recherche Scientifique (CNRS)-Département des Géosciences - ENS Paris, École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL), Département des Géosciences - ENS Paris, École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École des Ponts ParisTech (ENPC)-École polytechnique (X)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC), and Cardon, Catherine

Subjects
[SDU.STU.ME] Sciences of the Universe [physics]/Earth Sciences/Meteorology, [SDU.STU.ME]Sciences of the Universe [physics]/Earth Sciences/Meteorology
Published
2010

12. Modelling of the Mediterranean circulation using atmospheric fields from the WRF model at different space-time resolutions

Author

Lebeaupin Brossier, C., Béranger, Karine, Philippe, Drobinski, Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN), Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)), École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Météorologie Dynamique (UMR 8539) (LMD), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-École des Ponts ParisTech (ENPC)-Centre National de la Recherche Scientifique (CNRS)-Département des Géosciences - ENS Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-École normale supérieure - Paris (ENS-PSL), and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)

Subjects
[SDU]Sciences of the Universe [physics]
Abstract

International audience; In the framework of the MORCE-MED project, a two-way ocean-atmosphere coupling is developed between the Weather Research and Forecasting (WRF) atmospheric model and the NEMO ocean model over the Mediterranean basin. The future ocean-atmosphere coupled system is part of the future regional numerical platform including also the modelling of the continental superficial layers, atmospheric chemistry and marine biogeochemistry. Forced by global reanalyses or by the global climatic numerical system outputs, the whole regional coupled model aims to study the impacts of the climate change over the Mediterranean basin. Before applying the full two-way interactive coupling between the ocean and atmospheric regional models for long-term simulations over the Mediterranean, the forcing mode is considered through a sensitivity study. The downscaling of the NCEP reanalyses over the full Mediterranean basin with a 20-km resolution has been done with the WRF model between August 1998 and July 1999. The daily atmospheric fields obtained are then used to drive the NEMO model (with a 6-8 km resolution) over the Mediterranean Sea in a perpetual mode during a spinup of 8 years. Then, three experiments are done for a period of 4 years. The first experiment (or control experiment) is the continuity of the spinup. In the second experiment, a higher temporal resolution is used and the frequency of the forcing is 3 hours, which allows a good representation of the diurnal cycle and of the extreme air-sea exchanges that occur with a short duration during severe meteorological events. In the third experiment, a finer spatial resolution of the forcing is applied over the Gulf of Lions area in order to approach the ocean model resolution and to well represent the channelling of the Mistral and Tramontane. The benefit of increasing the space-time resolutions of the atmospheric forcing is estimated by a comparison of the ocean model performances to represent the general Mediterranean circulation as the characteristics of the mixed layer, of the deep convection and of the upwellings between the control experiment and the two sensitivity experiments, and by a comparison of our experiments to observations and climatologies.

Published
2009

13. The SURFEXv7.2 land and ocean surface platform for coupled or offline simulation of earth surface variables and fluxes

Author

Masson, V., primary, Le Moigne, P., additional, Martin, E., additional, Faroux, S., additional, Alias, A., additional, Alkama, R., additional, Belamari, S., additional, Barbu, A., additional, Boone, A., additional, Bouyssel, F., additional, Brousseau, P., additional, Brun, E., additional, Calvet, J.-C., additional, Carrer, D., additional, Decharme, B., additional, Delire, C., additional, Donier, S., additional, Essaouini, K., additional, Gibelin, A.-L., additional, Giordani, H., additional, Habets, F., additional, Jidane, M., additional, Kerdraon, G., additional, Kourzeneva, E., additional, Lafaysse, M., additional, Lafont, S., additional, Lebeaupin Brossier, C., additional, Lemonsu, A., additional, Mahfouf, J.-F., additional, Marguinaud, P., additional, Mokhtari, M., additional, Morin, S., additional, Pigeon, G., additional, Salgado, R., additional, Seity, Y., additional, Taillefer, F., additional, Tanguy, G., additional, Tulet, P., additional, Vincendon, B., additional, Vionnet, V., additional, and Voldoire, A., additional

Published
2013
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14. Characterization of air-sea exchanges over the Western Mediterranean Sea during HyMeX SOP1 using the AROME-WMED model.

Author

Rainaud, R., Lebeaupin Brossier, C., Ducrocq, V., Giordani, H., Nuret, M., Fourrié, N., Bouin, M.‐N., Taupier‐Letage, I., and Legain, D.

Subjects
*OCEAN-atmosphere interaction, *WEATHER forecasting, *HYDROLOGIC cycle, *ATMOSPHERIC boundary layer, *HEAT flux
Abstract

Air-sea exchanges play an important role during intense weather events over the Mediterranean Sea, especially in supplying heat and moisture for heavy precipitation events, which often affect the area. Observations collected during the first Hydrological cycle in the Mediterranean Experiment (HyMeX) Special Observation Period (SOP1) over the Western Mediterranean area in autumn 2012 provide an unprecedented dataset for assessing the capabilities of numerical weather prediction systems to represent the air-sea interface and marine boundary layer during the heavy precipitation season. A HyMeX-dedicated version of Application de la Recherche à l'Opérationnel à Méso-Échelle, in French (AROME) covering the whole western Mediterranean basin, named AROME-WMED, was evaluated through comparisons against moored buoys, drifting buoys and ship measurements deployed during the HyMeX campaign. A general, good agreement is found for near-surface meteorological parameters, whereas significant discrepancies are observed during strong air-sea exchange periods. The two main reasons are that (1) sea-surface temperature (SST) is kept constant during the model runs and (2) sensible heat flux is overestimated in strong wind regimes by the AROME turbulent flux parametrization. Air-sea exchanges during SOP1 were characterized thanks to AROME-WMED short-range (1-24 h) forecasts. This shows some areas of strong air-sea fluxes in the Gulf of Lion and the Balearic, Ligurian and Tyrrhenian Seas. The Gulf of Lion is the area showing the highest variability of air-sea fluxes, due to dominant strong regional winds (Mistral/Tramontane). Whereas some heavy precipitation events occur without significant air-sea fluxes, all strong air-sea exchange events include, or occur only 1 or 2 days before, heavy precipitation events. A detailed analysis of an Intense Observation Period (IOP) dedicated to a heavy precipitation event (IOP13, from 12-15 October) illustrates how both dynamic (wind) and thermodynamic (temperature and humidity gradient effect) contributions influence air-sea flux evolution. [ABSTRACT FROM AUTHOR]

Published
2016
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15. Influence of the sea state on Mediterranean heavy precipitation: a case-study from HyMeX SOP1.

Author

Thévenot, O., Bouin, M.‐N., Ducrocq, V., Lebeaupin Brossier, C., Nuissier, O., Pianezze, J., and Duffourg, F.

Subjects
OCEAN-atmosphere interaction, MEDITERRANEAN climate, METEOROLOGICAL observations, HYDROLOGIC cycle, HEAT flux
Abstract

Sea state can influence the turbulent air-sea exchanges, especially the momentum flux, by modifying the sea-surface roughness. The high-resolution non-hydrostatic convection-permitting model MESO-NH is used here to investigate the impact of a more realistic representation of the waves on heavy precipitation during the Intense Observation Period (IOP) 16a of the first HyMeX Special Observation Period (SOP1). Several quasi-stationary mesoscale convective systems developed over the western Mediterranean region, two of them over the sea, and resulted in heavy precipitation on the French and Italian coasts on 26 October 2012. Three different bulk parametrizations are tested in this study: a reference case (NOWAV) without any wave effect, a parametrization taking into account theoretical wave effects (WAV) and a last one with realistic wave characteristics from the MFWAM analyses (WAM). Using a realistic wave representation in WAM significantly increases the roughness length and the friction velocity with respect to NOWAV and WAV. The three MESO-NH sensitivity experiments of the IOP16a show that this surface-roughness increase in WAM generates higher momentum fluxes and directly impacts the low-level dynamics of the atmosphere, with a slowdown of the 10 m wind, when and where the wind speed exceeds 10 m s−1 and the sea state differs from the idealized one. The turbulent heat fluxes are not significantly influenced by the waves, these fluxes being controlled by the moisture content rather than by the wind speed in the simulations. Although the convective activity is globally well reproduced by all the simulations, the difference in the low-level dynamics of the atmosphere influences the localization of the simulated heavy precipitation. Objective evaluation of the daily rainfall amount and of the 10 m wind speed against the observations confirms the positive impact of the realistic wave representation on this simulation of heavy precipitation. [ABSTRACT FROM AUTHOR]

Published
2016
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16. Cyclone contribution to the Mediterranean Sea water budget.

Author

Flaounas, E., Luca, A., Drobinski, P., Mailler, S., Arsouze, T., Bastin, S., Beranger, K., and Lebeaupin Brossier, C.

Subjects
CYCLONES, SEAWATER, METEOROLOGICAL precipitation, EVAPORATION (Meteorology), OCEAN temperature
Abstract

This paper analyzes the impact of cyclones to the atmospheric components on the Mediterranean Sea Water Budget, namely the cyclones contribution to precipitation and evaporation over the Mediterranean Sea. Three regional simulations were performed with the WRF model for the period 1989-2008. The model was run (1) as a standalone model, (2) coupled with the oceanic model NEMO-MED12 and (3) forced by the smoothed Sea Surface Temperature (SST) fields from the second simulation. Cyclones were tracked in all simulations, and their contribution to the total rainfall and evaporation was quantified. Results show that cyclones are mainly associated with extreme precipitation, representing more than 50 % of the annual rainfall over the Mediterranean Sea. On the other hand, we found that cyclone-induced evaporation represents only a small fraction of the annual total, except in winter, when the most intense Mediterranean cyclones take place. Despite the significant contribution of cyclones to rainfall, our results show that there is a balance between cyclone-induced rainfall and evaporation, suggesting a weak net impact of cyclones on the Mediterranean Sea water budget. The sensitivity of our results with respect to rapid SST changes during the development of cyclones was also investigated. Both rainfall and evaporation are affected in correlation with the SST response to the atmosphere. In fact, air feedbacks to the Mediterranean Sea during the cyclones occurrence were shown to cool down the SST and consequently to reduce rainfall and evaporation at the proximity of cyclone centers. [ABSTRACT FROM AUTHOR]

Published
2016
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17. Supplementary material to "The SURFEXv7.2 land and ocean surface platform for coupled or offline simulation of Earth surface variables and fluxes"

Author

Masson, V., primary, Le Moigne, P., additional, Martin, E., additional, Faroux, S., additional, Alias, A., additional, Alkama, R., additional, Belamari, S., additional, Barbu, A., additional, Boone, A., additional, Bouyssel, F., additional, Brousseau, P., additional, Brun, E., additional, Calvet, J.-C., additional, Carrer, D., additional, Decharme, B., additional, Delire, C., additional, Donier, S., additional, Essaouini, K., additional, Gibelin, A.-L., additional, Giordani, H., additional, Habets, F., additional, Jidane, M., additional, Kerdraon, G., additional, Kourzeneva, E., additional, Lafaysse, M., additional, Lafont, S., additional, Lebeaupin Brossier, C., additional, Lemonsu, A., additional, Mahfouf, J.-F., additional, Marguinaud, P., additional, Mokhtari, M., additional, Morin, S., additional, Pigeon, G., additional, Salgado, R., additional, Seity, Y., additional, Taillefer, F., additional, Tanguy, G., additional, Tulet, P., additional, Vincendon, B., additional, Vionnet, V., additional, and Voldoire, A., additional

Published
2012
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18. The SURFEXv7.2 land and ocean surface platform for coupled or offline simulation of Earth surface variables and fluxes

Author

Masson, V., primary, Le Moigne, P., additional, Martin, E., additional, Faroux, S., additional, Alias, A., additional, Alkama, R., additional, Belamari, S., additional, Barbu, A., additional, Boone, A., additional, Bouyssel, F., additional, Brousseau, P., additional, Brun, E., additional, Calvet, J.-C., additional, Carrer, D., additional, Decharme, B., additional, Delire, C., additional, Donier, S., additional, Essaouini, K., additional, Gibelin, A.-L., additional, Giordani, H., additional, Habets, F., additional, Jidane, M., additional, Kerdraon, G., additional, Kourzeneva, E., additional, Lafaysse, M., additional, Lafont, S., additional, Lebeaupin Brossier, C., additional, Lemonsu, A., additional, Mahfouf, J.-F., additional, Marguinaud, P., additional, Mokhtari, M., additional, Morin, S., additional, Pigeon, G., additional, Salgado, R., additional, Seity, Y., additional, Taillefer, F., additional, Tanguy, G., additional, Tulet, P., additional, Vincendon, B., additional, Vionnet, V., additional, and Voldoire, A., additional

Published
2012
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21. Projet Cyprim, partie III : Cyclogénèses et précipitations intenses : éléments de prévisibilité, besoins en observations

Author

DOERENBECHER, A., primary, ARGENCE, S., additional, CASSOU, C., additional, DESCAMPS, L., additional, DUCROCQ, V., additional, FOURRIE, N., additional, GUIDARD, V., additional, JAUBERT, G., additional, JOLY, A., additional, LAMBERT, D., additional, PANGAUD, T, additional, SANCHEZ-GOMEZ, E., additional, TALAGRAND, O., additional, TERRAY, L., additional, VINCENDON, B., additional, CAUMONT, O., additional, and Lebeaupin-Brossier, C., additional

Published
2010
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24. MED-CORDEX initiative for Mediterranean Climate studies

Author

Pierre Nabat, Samuel Somot, Vassilios Vervatis, Vladimir Djurdjevic, Bodo Ahrens, Florence Sevault, Gabriel Jordá, Alessandro Dell'Aquila, Barış Önol, Piero Lionello, Gianmaria Sannino, Giovanni Liguori, P. Galàn, Jennifer Brauch, Naveed Akhtar, Anika Obermann, Karim Ramage, Paolo Ruti, Dario Conte, Thomas Arsouze, Silvio Gualdi, Csaba Torma, Diego Macías, Sophie Bastin, Adriana Carillo, William Cabos, Oriol Jorba, Lu Li, Filippo Giorgi, Blandine L'Hévéder, M. V. Struglia, Cindy Lebeaupin-Brossier, Miguel Ángel Gaertner, Giovanna Pisacane, Ali Harzallah, Jean-Christophe Calvet, Sandro Calmanti, Clemente Gallardo, Erika Coppola, Judit Bartholy, Philippe Drobinski, M. Gonçalves, A. Elizalde-Arellano, Sophie Bouffies-Cloché, Antonella Sanna, B. Raikovic, Jonathan Beuvier, Roland Aznar, Karine Béranger, Emmanouil Flaounas, Clotilde Dubois, Antoinette Alias, E. Lombardi, World Meteorological Organization (WMO), Centre national de recherches météorologiques (CNRM), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), Abdus Salam International Centre for Theoretical Physics [Trieste] (ICTP), National Observatory of Athens (NOA), Institut für Atmosphäre und Umwelt [Frankfurt/Main] (IAU), Goethe-Universität Frankfurt am Main, ENEA Ente per le Nuove Technologie Energia e Ambiente, Centro Ricerche Casaccia, Centro Ricerche Casaccia, Institut National des Sciences et Technologies de la Mer [Salammbô] (INSTM), Unité de Mécanique (UME), École Nationale Supérieure de Techniques Avancées (ENSTA Paris), Puertos de l’Estado, SPACE - LATMOS, Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Department of Meteorology [Budapest], Institute of Geography and Earth Sciences [Budapest], Faculty of Sciences [Budapest], Eötvös Loránd University (ELTE)-Eötvös Loránd University (ELTE)-Faculty of Sciences [Budapest], Eötvös Loránd University (ELTE)-Eötvös Loránd University (ELTE), Universidad de Alcalá - University of Alcalá (UAH), Euro-Mediterranean Center on Climate Change (CMCC), University of Belgrade [Belgrade], Laboratoire de Météorologie Dynamique (UMR 8539) (LMD), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-École des Ponts ParisTech (ENPC)-Centre National de la Recherche Scientifique (CNRS)-Département des Géosciences - ENS Paris, École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL), Max-Planck-Institut für Meteorologie (MPI-M), Max-Planck-Gesellschaft, Instituto de Ciencias Ambientales [Toledo] (ICAM), Universidad de Castilla-La Mancha = University of Castilla-La Mancha (UCLM), Universidad Politécnica de Madrid (UPM), Universitat Politècnica de Catalunya [Barcelona] (UPC), Barcelona Supercomputing Center - Centro Nacional de Supercomputacion (BSC - CNS), Institut Mediterrani d'Estudis Avancats (IMEDEA), Consejo Superior de Investigaciones Científicas [Madrid] (CSIC)-Universidad de las Islas Baleares (UIB), École polytechnique (X), Department of Physics [Lecce], Università del Salento [Lecce], JRC Institute for Environment and Sustainability (IES), European Commission - Joint Research Centre [Ispra] (JRC), Istanbul Technical University (ITÜ), Faculty of Physics and Meteorology [Belgrade], Institut Pierre-Simon-Laplace (IPSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), Agenzia Nazionale per le nuove Tecnologie, l’energia e lo sviluppo economico sostenibile = Italian National Agency for New Technologies, Energy and Sustainable Economic Development (ENEA), National and Kapodistrian University of Athens (NKUA), Agence Nationale de la Recherche (ANR)European Commission (CLIMRUN Project), ANR-12-SENV-0001,REMEMBER,Compréhension et modélisation du système climatique régional couplé pour la prévention des risques hydrométéorologiques en Méditerranée dans un contexte de changement global(2012), Groupe d'étude de l'atmosphère météorologique (CNRM-GAME), Institut national des sciences de l'Univers (INSU - CNRS)-Météo France-Centre National de la Recherche Scientifique (CNRS), Département des Géosciences - ENS Paris, École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École des Ponts ParisTech (ENPC)-École polytechnique (X)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC), Universidad de Castilla-La Mancha (UCLM), Italian National Agency for New Technologies, Energy and Sustainable Economic Development (ENEA), Universitat Politècnica de Catalunya. Departament d'Enginyeria de Projectes i de la Construcció, Universitat Politècnica de Catalunya. GReCT - Grup de Recerca de Ciències de la Terra, Ruti, P. M., Somot, S., Giorgi, F., Dubois, C., Flaounas, E., Obermann, A., Dell’Aquila, A., Pisacane, G., Harzallah, A., Lombardi, E., Ahrens, B., Akhtar, N., Alias, A., Arsouze, T., Aznar, R., Bastin, S., Bartholy, J., Béranger, K., Beuvier, J., Bouffies Cloché, S., Brauch, J., Cabos, W., Calmanti, S., Calvet, J. C., Carillo, A., Conte, Dario, Coppola, E., Djurdjevic, V., Drobinski, P., Elizalde Arellano, A., Gaertner, M., Galàn, P., Gallardo, C., Gualdi, S., Goncalves, M., Jorba, O., Jordà, G., L’Heveder, B., Lebeaupin Brossier, C., Li, L., Liguori, G., Lionello, Piero, Maciàs, D., Nabat, P., Önol, B., Raikovic, B., Ramage, K., Sevault, F., Sannino, G., Struglia, M. V., Sanna, A., Torma, C., Vervatis, V., and European Commission

Subjects
Mediterranean climate, Atmospheric Science, 010504 meteorology & atmospheric sciences, Climatologia -- Models matemàtics, 0208 environmental biotechnology, Environmental system, Vulnerability, Spatial and temporal scale, Climate change, Biogeochemical proce, 02 engineering and technology, Climatology--Simulation methods, 01 natural sciences, Regional climate model, Desenvolupament humà i sostenible::Prospectiva, sistèmica i modelització [Àrees temàtiques de la UPC], 11. Sustainability, Added value, Precipitation, Mediterranean Region--Climate, Mediterranean region, Temporal scales, 0105 earth and related environmental sciences, Previsió del temps, [PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph], Mediterrània, Regió -- Clima, business.industry, Environmental resource management, Desenvolupament humà i sostenible::Degradació ambiental::Canvi climàtic [Àrees temàtiques de la UPC], Climatologia -- Mètodes de simulació, 15. Life on land, Regional climate simulation, 020801 environmental engineering, Earth system science, 13. Climate action, Regional downscaling, [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology, Climatology, Environmental science, Climate model, business
Abstract

The Mediterranean is expected to be one of the most prominent and vulnerable climate change >hotspots> of the twenty-first century, and the physical mechanisms underlying this finding are still not clear. Furthermore, complex interactions and feedbacks involving ocean-atmosphere-land-biogeochemical processes play a prominent role in modulating the climate and environment of the Mediterranean region on a range of spatial and temporal scales. Therefore, it is critical to provide robust climate change information for use in vulnerability-impact-adaptation assessment studies considering the Mediterranean as a fully coupled environmental system. The Mediterranean Coordinated Regional Downscaling Experiment (Med-CORDEX) initiative aims at coordinating the Mediterranean climate modeling community toward the development of fully coupled regional climate simulations, improving all relevant components of the system from atmosphere and ocean dynamics to land surface, hydrology, and biogeochemical processes. The primary goals of Med-CORDEX are to improve understanding of past climate variability and trends and to provide more accurate and reliable future projections, assessing in a quantitative and robust way the added value of using high-resolution and coupled regional climate models. The coordination activities and the scientific outcomes of Med-CORDEX can produce an important framework to foster the development of regional Earth system models in several key regions worldwide., This work is a contribution to the HyMeX program supported by grants MISTRALS and ANR-12-SENV-001 REMEMBER and to the CLIMRUN project (www.climrun.eu) funded under the European Commission’s Seventh Framework Programme (FP7).

Published
2016

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