MOCAGE

Description

MOCAGE is the Météo-France multi-scale Chemistry and Transport Model, that covers a range of scientific applications, from the study of climate-chemistry interaction to chemical weather forecasting [Peuch et al., 1999].

Applications

 Air quality simulations and forecasts: PREV’AIR

 Operational Applications:

 Chemistry and Climate Interaction

The climatic version of the MOCAGE Chemistry and Transport Model (CTM), referenced hereafter as MOCAGE-Climat, has been developed by the CAIAC team of the research department of Météo-France, CNRM (Centre National de Recherches Météorologiques). This model is based on the Météo-France multi-scale CTM MOCAGE, that covers a range of scientific applications, from the study of climate-chemistry interaction to chemical weather forecasting [Peuch et al., 1999]. The horizontal (Gaussian grid) and vertical resolutions (from the surface up to 70 km) of MOCAGE-Climat are specific to the study of global processes, with a special interest in stratospheric and UTLS region ones. Both horizontal and vertical resolutions are adapted to the ECMWF analyses or the simulations from the ARPEGE-Climat General Circulation Model used for several climate studies (see for instance [Royer et al., 2001]). The large-scale (semi-Lagrangian scheme) and convective transport [Tiedke, 1989; Bechtold et al., 2001], the wet deposition [Mari et al., 2000; Giorgi and Chameides, 1986; Liu et al. 2001], and the exchanges with the surface are common to both versions of the models. MOCAGE-Climat accounts for surface emissions of NOx, CO, and anthropogenic VOCs [Dentener et al., 2004]; biogenic VOC are those of [Guenther et al., 1995]. The interactive dry deposition scheme is described in [Michou and Peuch, 2002; Michou et al., 2004]. The chemistry scheme of MOCAGE-Climat is specific to climate applications: it is a combination of the RELACS scheme [Crassier et al., 2000] which is a simplified version of the tropospheric RACM scheme [Stockwell et al., 1997], merged with the REPROBUS scheme for the stratosphere [Lefèvre et al., 1994] that includes the heterogeneous chemistry described in [Carslaw et al., 1995]. Thus, this scheme takes into account 83 species throughout 242 thermal reactions, with the three-dimensional distributions that are calculated for the whole atmosphere. Among these chemical species, 64 are transported while the 17 remaining ones are at instantaneous chemical equilibrium. This scheme allows to describe the stratospheric chemistry with chlorine, bromine and nitrogen species for the main sources, radicals and reservoir forms for each family. In the troposphere, the chemistry describes several VOCs for both organic and inorganic chemistry (for further details, the reader is referred to [Crassier et al., 2000]. A specific treatment is applied to the chemistry in the boundary layer in order to reduce time-consumption: before computing the chemistry, an average is made for a given number of the lowest vertical layers of MOCAGE-Climat. Then, the chemical evolution is calculated upon this mean state, giving the mean percentage of variation for each chemical compound, that is finally applied to the initial profiles, giving a mean temporal evolution of the chemistry within the boundary layer.

Collaborations

Météo-France:

DP/SERV/ENV (MOCAGE Accident)

Others:

CERFACS Laboratoire d’Aérologie

Institut Pierre Simon Laplace

Laboratoire de Physique et Chimie de l’Environnement

Laboratoire de Glaciologie et Géophysique de l’Environnement

Publications

Bechtold, P. et al. (2001), A mass flux convection scheme for regional and global models, Quart. J. Roy. Meteor. Soc., 127, 869-886.

Bousserez, N., J.-L. Attié, V.-H. Peuch, M. Michou, G. Pfister, D. Edwards, M. Avery, G. Sachse, E. Browell and E. Ferrare, 2006 : Evaluation of MOCAGE chemistry and transport model during the ICARTT/ITOP experiment, J. Geophys. Res., submitted.

Cariolle, D. and M. Déqué (1986), Southern hemisphere medium-scale waves and total ozone disturbances in a spectral general circulation model, J. Geophys. Res., 91, 10825-10846

Carslaw, K, et al. (1995), Vapour pressures of H2SO4/HNO3/HCl/HBr/H2O solutions to low stratospheric temperatures, Geophys. Res. Lett., 22, 247-250. Cathala M.L., Assimilation de mesures chimiques d’ozone au niveau de la tropopause dans un Modèle de Chimie-Transport Global, Ph.D thesis, Université Paul Sabatier, Toulouse, 2004.

Clark, H.L., M.-L. Cathala, H. Teyssèdre, J.-P. Cammas and V.-H. Peuch, 2006 : Cross-tropopause fluxes of ozone using assimilation of MOZAIC observations in a global CTM, Tellus, révisions mineures.

Crassier, V., et al. (2000), Developement of a reduced chemical scheme for use in mesoscale meteorological models, Atm. Env., 34, 2633-2644. C. Cuvelier, P. Thunis, R. Vautard, M. Amann, B. Bessagnet M. Bedogni, R. Berkowicz, F. Brocheton, P. Builtjes, C. Carnavale, A. Coppalle, B.Denby, G. Douros, A. Graf, O. Hellmuth, C. Honore, J. Jonson, A. Kerschbaumer, F. de Leeuw, E. Minguzzi, N. Moussiopoulos, C. Pertot, V.H.Peuch, G. Pirovano, L. Rouil, F. Sauter, M. Schaap, R. Stern, L. Tarrason, E. Vignati, L. Volta, L. White, P. Wind, A. Zuber, 2006 : CityDelta, a model intercomparison study to explore the impact of emission reductions in European cities in 2010, Atmos. Env., ATMENV-D-06-00252R1, in press.

F. Dentener, D. Stevenson, K. Ellingsen, T. van Noije, M. Schultz, M. Amann, C. Atherton, N. Bell, D. Bergmann, I. Bey, L. Bouwman, T. Butler, J.Cofala, B. Collins, J. Drevet, R. Doherty, B. Eickhout, H. Eskes, A. Fiore, M. Gauss, D. Hauglustaine, L. Horowitz, I. Isaksen, B. Josse, M.Lawrence, M. Krol1, J.F. Lamarque, V. Montanaro, J.F. Müller, V.H. Peuch, G. Pitari, J. Pyle,S. Rast, J. Rodriguez, M. Sanderson, N. Savage, D.Shindell, S. Strahan, S. Szopa, K. Sudo, O. Wild, G. Zeng, 2006 : The global atmospheric environment for the next generation, Environmental Science and Technology, 40, 3586-3594.

Dentener, F. et al. (2004), The impact of air pollutant and methane emission controls on tropospheric ozone and radiative forcing : CTM calculations for the period 1990-2030, Atmos. Chem. Phys. Discuss., 4, 8471-8538.

Drobinski, P., F. Saïd, G. Ancellet, J. Arteta, P. Augustin, S. Bastin, A. Brut, J.-L. Caccia, B. Campistron, S. Cautenet, A. Colette, B. Cros, U.Corsmeier, I. Coll, A. Dabas, H. Delbarre, A. Dufour, P. Durand, V. Guénard, M. Hasel, N. Kalthoff, C. Kottmeier, A. Lemonsu, F. Lohou, V.Masson, L. Menut, C. Moppert, V.-H. Peuch, V. Puygrenier and O. Reitebuch, 2006 : Regional transport and dilution during high pollution episodes in southeastern France : summary of findings from the ESCOMPTE experiment, J. Geophys. Res., révisions mineures.

Geer, A.J. , W.A. Lahoz, S. Bekki, N. Bormann, Q. Errera, H.J. Eskes, D. Fonteyn, D.R. Jackson, M.N. Juckes, S. Massart, V.-H. Peuch, S.Rharmili and A. Segers, 2006 : The ASSET intercomparison of ozone analyses : method and first results, Atmos.Chem.Phys.Disc., 1680- 7375/acpd/2006-6-4495, 4495-4577. El Amraoui L., V.-H. Peuch, P. ricaud, S. Massart, J. Urban, N. Semane, H. Teyssèdre, D. Cariolle, F. Karcher and D. Murtagh, 2006 : 2002-2003 Arctic ozone loss deduced from the assimilation of ODIN/SMR O3 and N2O measurements, Atmos.Chem.Phys.Disc., submitted.

Giorgi, F. and W.L. Chamedeis (1986), Rainout lifetimes of highly soluble aerosols and gases as inferred from simulations with a general circulation model, J. Geophys. Res., 91, D13, 14367-14376 Guenther, A. et al. (1995), A global model of natural volatile compound emissions, J. Geophys. Res., 100, D5, 8873-8892.

Josse B., Représentation des processus de transport et de lessivage pour la modélisation de la composition chimique de l’atmosphère à l’échelle planétaire, Ph.D thesis, Université Paul Sabatier, Toulouse, 2004.

Josse B., P. Simon and V.-H. Peuch, Rn-222 global simulations with the multiscale CTM MOCAGE, Tellus, 56B, 339-356, 2004a.

Lefèvre et al. (1994), Chemistry of the 1991-1992 stratospheric winter: three-dimensionnal model simulations, J. Geophys. Res., 99, 8183-8195.

Liu, H. et al., (2001), Constraints from 210Pb and 7Be on wet deposition and transport in a global three-dimensional chemical-transport model driven by assimilated meteorological fields, J. Geophys. Res., 106, D18, 12109-12128. Mari, C. et al., (2000), Transport and scavenging of soluble gases in a deep convective cloud, J. Geophys. Res., 105, D17, 22255-22267.

Massart, S., D. Cariolle and V.-H. Peuch, 2005 : Vers une meilleure représentation de la distribution et de la variabilité de l’ozone atmosphérique par l’assimilation des données satellitaires, C. R. Géosciences, doi:10.1016/j.crte.2005.08.001.

Michou M., Modélisation du dépôt sec et des émissions d’espèces chimiques d’intérêt pour la qualité de l’air et pour la composition de la troposphère, Ph.D thesis, Université Paul Sabatier, Toulouse, 2005.

Michou, M. and V.-H. Peuch (2002), Surface exchanges in the MOCAGE multiscale Chemistry and Transport Model, Journal of Water Science, 15, 173-203.

Michou, M. et al. (2004), Measured and modeled dry deposition velocities over the ESCOMPTE area, Atmos. Res., 74, 89-116, doi:10;1016/j.atmosres.2004.04.011.

Nho-Kim, E.-Y., V.-H. Peuch and S. N. Oh, 2005 : Estimation of the global distribution of Black Carbon aerosols with MOCAGE, the CTM of Météo-France, J. Korean Meteor. Soc., vol. 41 n°4, 587-598.

Peuch, V.-H. et al. (1999), MOCAGE: Modèle de Chimie-Transport à Grande Echelle, Acte de l’Atelier de Modélisation de l’Atmosphère, 1999, 33-36.

Pradier, S., J.-L. Attié, M. Chong , J. Escobar, V.-H. Peuch, J.-F. Lamarque, B. Khattatov and D. Edwards, 2006 : Evaluation of 2001 springtime CO transport over West Africa using MOPITT CO measurements assimilated in a global chemistry transport model, Tellus, 58B, n°3, 163-176.

Royer, J.-F. et al. (2001), Simulation des changements climatiques au cours du XXIe siècle incluant l’ozone stratosphérique, C.R. Geoscience, 334, 147-154. Stockwell, W.R. et al. (1997), A new mechanism for regional atmospheric chemistry modelling, J. Geophys. Res., 102, 25847-25879.

Teyssèdre, H. et al. (2006), The climatic version of the MOCAGE tropospheric-stratospheric Chemistry and Transport Model: description, evaluation and sensitivity to surface processes, in preparation.

Tiedtke, M., (1989), A comprehensive mass flux scheme for cumulus parametrization in large scale models, Mon. Wea. Rev., 117, 1779-1800. World Meteorological Organization (1998), Scientific assessment of ozone depletion: 1998, Rep. 44, Geneva, Switzerland.

World Meteorological Organization (2000), Scientific assessment of ozone depletion: 2000, Rep. 47, Geneva, Switzerland.