Search Results - "Lafore, J.‐P."

Shifting the diurnal cycle of parameterized deep convection over land by Rio, C., Hourdin, F., Grandpeix, J.-Y., Lafore, J.-P.

“…In most atmospheric circulation models used for climate projections, cloud and convective processes are not explicitly resolved but parameterized. Such models…”
Get full text

Seasonal evolution of the West African heat low: a climatological perspective by Lavaysse, C, Flamant, C, Janicot, S, Parker, D. J, Lafore, J.-P, Sultan, B, Pelon, J

“…The West African heat low (WAHL), a region of high surface temperatures and low surface pressures, is a key element of the West African monsoon system. In this…”
Get full text

The importance of the diurnal cycle of Aerosol Optical Depth in West Africa by Kocha, C., Tulet, P., Lafore, J.-P., Flamant, C.

“…High resolution atmospheric simulations with the AROME model coupled with a dust module over West Africa for the whole of June 2006 were used to calculate…”
Get full text

10–25-Day Intraseasonal Variability of Convection over the Sahel: A Role of the Saharan Heat Low and Midlatitudes by Roehrig, R., Chauvin, F., Lafore, J.-P.

“…The understanding and forecasting of persistent dry or wet periods of the West African monsoon (WAM), especially those that occur at the intraseasonal time…”
Get full text

Large-scale overview of the summer monsoon over West Africa during the AMMA field experiment in 2006 by Janicot, S., Thorncroft, C. D., Ali, A., Asencio, N., Berry, G., Bock, O., Bourles, B., Caniaux, G., Chauvin, F., Deme, A., Kergoat, L., Lafore, J.-P., Lavaysse, C., Lebel, T., Marticorena, B., Mounier, F., Nedelec, P., Redelsperger, J.-L., Ravegnani, F., Reeves, C. E., Roca, R., de Rosnay, P., Schlager, H., Sultan, B., Tomasini, M., Ulanovsky, A.

“…The AMMA (African Monsoon Multidisciplinary Analysis) program is dedicated to providing a better understanding of the West African monsoon and its influence on…”
Get full text

The annual cycle of the West African monsoon in a two‐dimensional model: mechanisms of the rain‐band migration by Peyrillé, P., Lafore, J.‐P., Boone, A.

“…The processes that drive the annual cycle of the West African Monsoon (WAM) are analysed using an idealized meridional–vertical numerical model that includes…”
Get full text

High-resolution simulation of a major West African dust-storm: comparison with observations and investigation of dust impact by Kocha, C., Lafore, J.-P., Tulet, P., Seity, Y.

“…This study focuses on the radiative impacts of dust on the thermodynamics and dynamics of a major Saharan dust‐storm that occurred between 7 and 15 March 2006…”
Get full text

Understanding the West African Monsoon from the analysis of diabatic heating distributions as simulated by climate models by Martin, G. M., Peyrillé, P., Roehrig, R., Rio, C., Caian, M., Bellon, G., Codron, F., Lafore, J.‐P., Poan, D. E., Idelkadi, A.

“…Vertical and horizontal distributions of diabatic heating in the West African monsoon (WAM) region as simulated by four model families are analyzed in order to…”
Get full text

Synoptic variability of the monsoon flux over West Africa prior to the onset by Couvreux, F., Guichard, F., Bock, O., Campistron, B., Lafore, J.‐P., Redelsperger, J.‐L.

“…This study investigates the synoptic variability of the monsoon flux during the establishment of the West African monsoon using observations and ECMWF…”
Get full text

West African Monsoon observed with ground-based GPS receivers during African Monsoon Multidisciplinary Analysis (AMMA) by Bock, O., Bouin, M. N., Doerflinger, E., Collard, P., Masson, F., Meynadier, R., Nahmani, S., Koité, M., Gaptia Lawan Balawan, K., Didé, F., Ouedraogo, D., Pokperlaar, S., Ngamini, J.-B., Lafore, J. P., Janicot, S., Guichard, F., Nuret, M.

“…A ground‐based GPS network has been established over West Africa in the framework of African Monsoon Multidisciplinary Analysis (AMMA) in tight cooperation…”
Get full text

The role of stability and moisture in the diurnal cycle of convection over land by Chaboureau, J.‐P., Guichard, F., Redelsperger, J.‐L., Lafore, J.‐P.

“…The diurnal cycle of convection over land is investigated by a cloud‐resolving model simulation. Three regimes of convection—dry, shallow, and…”
Get full text

Comparison of ground‐based GPS precipitable water vapour to independent observations and NWP model reanalyses over Africa by Bock, O., Bouin, M.‐N., Walpersdorf, A., Lafore, J. P., Janicot, S., Guichard, F., Agusti‐Panareda, A.

“…This study aims at assessing the consistency between different precipitable water vapour (PWV) datasets over Africa (between 35°N and 10°S). This region is…”
Get full text

Water‐vapour variability within a convective boundary‐layer assessed by large‐eddy simulations and IHOP_2002 observations by Couvreux, F., Guichard, F., Redelsperger, J.‐L., Kiemle, C., Masson, V., Lafore, J.‐P., Flamant, C.

“…This study presents a comprehensive analysis of the variability of water vapour in a growing convective boundary‐layer (CBL) over land, highlighting the…”
Get full text

The Meso-NH Atmospheric Simulation System. Part I: adiabatic formulation and control simulations by LAFORE, J. P, STEIN, J, PINTY, J. P, REDELSPERGER, J. L, RICHARD, E, VILA-GUERAU DE ARELLANO, J, ASENCIO, N, BOUGEAULT, P, DUCROCQ, V, DURON, J, FISCHER, C, HEREIL, P, MASCART, P, MASSON, V

“…The Meso-NH Atmospheric Simulation System is a joint effort of the Centre National de Recherches Météorologiques and Laboratoire d'Aérologie. It comprises…”
Get full text

Multiscale analysis of precipitable water vapor over Africa from GPS data and ECMWF analyses by Bock, O., Guichard, F., Janicot, S., Lafore, J. P., Bouin, M.-N., Sultan, B.

“…This is the first climatological analysis of precipitable water vapor (PWV) from GPS data over Africa. The data reveal significant modulations and variability…”
Get full text

Multi‐scale description of a Sahelian synoptic weather system representative of the West African monsoon by Redelsperger, J.‐L., Diongue, A., Diedhiou, A., Ceron, J.‐P., Diop, M., Gueremy, J.‐F., Lafore, J.‐P.

“…A reference case of a Sahelian weather system observed during the Hydrological Atmospheric Pilot Experiment, HAPEX‐SAHEL, in August 1992, is described from a…”
Get full text

Numerical study of a Sahelian synoptic weather system: Initiation and mature stages of convection and its interactions with the large‐scale dynamics by Diongue, A., Lafore, J.‐P., Redelsperger, J.‐L., Roca, R.

“…A 24 h multi‐scale simulation of the life cycle of a Sahelian squall line is presented. The initial and coupling fields have been taken from the European…”
Get full text

Introduction to the AMMA Special Issue on ‘Advances in understanding atmospheric processes over West Africa through the AMMA field campaign’ by Lafore, J.‐P., Flamant, C., Giraud, V., Guichard, F., Knippertz, P., Mahfouf, J.‐F., Mascart, P., Williams, E.R.

Get full text

An idealized two-dimensional approach to study the impact of the West African monsoon on the meridional gradient of tropospheric ozone by Saunois, M., Mari, C., Thouret, V., Cammas, J. P., Peyrillé, P., Lafore, J. P., Sauvage, B., Volz-Thomas, A., Nédélec, P., Pinty, J. P.

“…An idealized vertical‐meridional zonally symmetrical version of the Méso‐NH model is used to study the response of tropospheric ozone to the dynamics of the…”
Get full text

Mesoscale analysis and impact on simulation of IOP14 of the MAP experiment by Nuret, M., Lafore, J. P., Gouget, V., Ducrocq, V.

“…This paper examines the benefit on quantitative precipitation forecasts of assimilating a mesoscale network of surface observations. The analysis is performed…”
Get full text