LMD Contents People
Katia Laval (PI) WP1000
Natural variability of monsoons Modelling
progress report Janicot, S. Spatio-temporal variability of West African rainfall. Part I : Regionalizations and typings. Journal of Climate, 5, 489-497. Janicot, S. Spatio-temporal variability of West African rainfall. Part II : Associated surface and air masses characteristics. Journal of Climate, 5, 499-511. Fontaine, B. and Janicot, S Wind field coherence and its variations over West Africa. Journal of Climate, 5, 512-524. Janicot, S. The West African monsoon of 1987 and 1988 : Pacific or Atlantic signal ? International Conference on Monsoon Variability and Prediction, Trieste, Italie, WCRP-84, WMO/TD-No 619, 765-772. Janicot, S. The recent West African rainfall variability through empirical and modelling investigations. Global precipitations and climate change, NATO ASI Series, I, Vol.26, 135-150. Fontaine, B. Janicot, S. and Moron, VRainfall anomaly patterns and wind field signals over West Africa in August (1958-1989). Journal of Climate, 8, 1503-1510. Roucoup P. et al Vertical motion changes related to north-east Brazil rainfall variability : a AGCM simulation. Int. J. Climatology, 16, 879-891. Fontaine, B. and Janicot, S. Near-global sea surface temperature variability associated with West African rainfall anomaly types. Journal of Climate, 9, 2935-2940. Janicot S. Fontaine, B and Moron, V. ENSO dynamics and Sahel droughts Geophysical Research Letters, Vol.23, 5, 515-518. Janicot S. ENSO Impact on atmospheric circulation and convection over the tropical Atlantic and West Africa. Annales Geophysicae, 15, 471-475. Janicot S., Harzallah, A. Fontaine, B and Moron, V. West African monsoon dynamics and eastern equatorial Atlantic and Pacific SST anomalies (1970-1988). Journal of Climate, 11, 1874-1882. Fontaine, B., Trzaska, S and Janicot, S. Evolution of the relationship between near global and Atlantic SST modes and the rainy season in West Africa: statistical analyses and sensitivity experiments. Climate Dynamics, 14, 353-368. Diedhou A., Janicot, S. Viltard, A. De Fleece, P. and Laurent, H A fast eastern wave in West Africa troposphere Meteorology and Atmospheric Physics, 69, 39-47. Diedhou A., Janicot, S. Viltard, A. and De Fleece P. Evidence of two regimes of easterly waves over West Africa and the tropical Atlantic Geophysical Research Letters, 25, 2805-2808. Diedhou A., Janicot, S. Viltard, A. De Fleece, P. and Laurent, H Easterly wave regimes and associated convection over West Africa and the tropical Atlantic : Results from NCEP/NCAR and ECMWF reanalyses. Climate Dynamics, 15, 795-822 Fontaine, B. Janicot, S. Observed and modelled surface variability in the tropical Atlantic region and its rainfall impacts. Climate Dynamics, 15, 451-473. Poccard, I., Janicot, S. and Camberlin, P. (2000) Comparison of rainfall structures between NCEP/NCAR reanalysis and observed data over tropical Africa. Climate Dynamics, 16, 897-915. Diedhou A., Janicot, S. Viltard, A. De Fleece, P. and Laurent, H. Composite patterns and energetics of easterly wave disturbances over West Africa and the tropical Atlantic : Results from the 1979-1995 NCEP/NCAR reanalyses. Climate Dynamics, revised. Janicot, S., Trzaska, S. and Poccard, I. Decadal scale variability of summer Sahel-ENSO teleconnection Climate Dynamics, revised. Janicot S. and Sultan, B. (2000)Abrupt shift of the ITCZ over West Africa and intra-seasonal variability Geophysical Research Letters, 27, .3353-3356 Camberlin, P., Janicot S. and Poccard, I. Seasonality and atmospheric dynamics of the teleconnection between African rainfall and tropical ocean surface temperature : Atlantic versus ENSO International Journal of Climatology, accepted. Polcher, J. (1994) Etude de la sensibilite du climat tropical a la deforestation. PhD Thesis, Universite Pierre et Marie Curie, Paris VI. Polcher, J. and Laval, K. (1994a) The impact of African and Amazonian deforestation on tropical climate. Journal of Hydrology 155:389-405. Polcher, J. and Laval, K. (1994b) A statistical study of the regional impact of deforestation on climate in the LMD-GCM. Climate Dynamics 10:205-219. Le Roux, X., Polcher, J., Dedieu, G., Menaut, J. C., and Monteny, B. (1994) Radiation exchanges above west african moist savannas: seasonal patterns, and comparaison with a GCM simulation. J. Geophys. Res. 99(D12):25,857-25,868. Mechoso, C.R., Robertson, A.W., Barth, N., Davey, M.K., Delecluse, P., Gent, P.R., Ineson, S., Kirtman, B., Latif, M., Le Treut, H., Nagai, T., Neelin, J.D., Philander, S.G.H., Polcher, J., Schopf, P.S., Stockdale, T., Suarez, M.J., Terry, L., Thual, O., Tribbia, J.J. (1995). The seasonal cycle over the tropical pacific in general circulation models. Monthly Weather Review 123(9):2825-2838. Polcher, J. (1995) Sensitivity of tropical convection to land surface processes. Journal of the Atmospheric Sciences 52(17):3143-3161. R.C. Raghava, K. Laval, R. Sadourny, J. Polcher (1995) On the atmospheric response to the tropical denuding of vegetation. Atmospheric Environment , 29, pp1963-2000 K. Laval and J. Polcher (1995) Sensitivity of the Indian Monsoon to Land-Surface Evaporationrate in the LMD-GCM. AMIP Scientific Conference, 15-19 May 1995, Monterey, California Polcher J., Laval, K., Dumenil, L., Lean, J., Rowntree, P.R. (1996) Comparing three land surface schemes used in GCMs. Journal of Hydrology 180:373-394. Polcher J. and Shao, Y. (1996) A Standard format for reporting PILPS experiments. Global and Planetary Change 13:217-223. Peylin, P., Polcher J., Bonan, G., Williamson, D., Laval, K. (1996) Comparison of two complex Land-Surface Schemes coupled to the NCAR-GCM J. Geophys. Res. 102:19,413-19,431. Chen, T.H. ... Polcher, J. ... Laval, K. ... (1996) Cabauw experimental results from the project for intercomparison of land-surface parameterization schemes (PILPS) Journal of Climate 10:1194-1215. Laval, K., Raghava, R.C., Polcher, J., Sadourny, R., Forichon, M., (1996) Simulation of the 1987 and 1988 Indian Monsooons using the LMD GCM. Journal of Climate 9:3357-3371. Henderson-Sellers, A., Polcher, J., Chen, T. H., Nakken, M., and Pitman, A. J., (1996) Predicting global change at the land-surface: the Project for Intercomparison of Land-Surface Parameterization Schemes (PILPS) (Phase 4). Seventh Symposium on Global Change Studies pp. 59-66, Boston, American Meteorological Society. Polcher, Jan (1997) The sensitivity of the tropical climate to land surface processes. ECMWF Seminar 8 Sep. 1997 - 12 Sep. 1997 Laval,Katia (1997) Hydrological processes in GCMs. NATO ASI Series Vol 46. Edited by Sorooshian. Springer Verlag. Schulz, J.-P., L. Dumenil, J. Polcher, C. A. Schlosser, Y. Xue, (1998) Land surface energy and moisture fluxes: comparing three models, J. Appl. Meteor. 37:288-307. Ducharne, A. Laval, K. and Polcher, J. (1998) Sensitivity of the hydrological cycle to the parameterization of soil hydrology in a GCM. Climate Dynamics, 14, pp 307-327. J.Polcher, B. McAvaney, P. Viterbo, M.-A. Gaertner, A. Hahmann, J.-F. Mahfouf, J. Noilhan, T. Phillips, A. Pitman, C.A. Schlosser, J.-P. Schulz, B. Timbal, D. Verseghy and Y. Xue. (1998) A proposal for a general interface between land-surface schemes and general circulation models. Global and Planetary Change, 19, pp 263-278. Ciret, C., Polcher, J. and Le Roux, X. (1998) An approach to simulate the phenology of savanna ecosystems in the LMD general circulation model. Global Biogeochemical Cycles 13(2), pp603-622. De Rosnay, P. and Polcher J. (1998) Modeling root water uptake in a complex land surface scheme coupled to a GCM. Hydrology and Earth System Sciences 13(2), pp603-622 J. Polcher, J. Crossley, C. Bunton, H. Douville, N. Gedney, K. Laval, S. Planton, P.R. Rowntree, and P. Valdes (1998) Importance of land-surface processes for the uncertainties of climate change; A European project. GEWEX-News, May. M. Sabre, K. Hodges, K. Laval, J. Polcher and F. Desalmand (2000): Simulations of Monsoon disturbances in the LMD GCM. Monthly Weather Review, 128, 3752-3771 A. Ducharne and K. Laval (2000): Influence of the realistic description of soil-holding capacity on the global water cycle in a GCM. Journal of Climate, 13, 4393-4413
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