O. F. Ati, C. J. Stigter, and E. O. Oladipo, A comparison of methods to determine the onset of the growing season in northern Nigeria, International Journal of Climatology, vol.10, issue.6, pp.731-742, 2001.
DOI : 10.1002/joc.712

G. M. Barnes and K. Sieckman, The Environment of Fast- and Slow-Moving Tropical Mesoscale Convective Cloud Lines, Monthly Weather Review, vol.112, issue.9, pp.1782-1794, 1984.
DOI : 10.1175/1520-0493(1984)112<1782:TEOFAS>2.0.CO;2

A. Bouchard, Bilans d'Eau et d'Energie par Inversion et Fusion de Données, Thèse de Doctorat, 2006.

A. Bouchard and Y. Lemaître, A new 4D Variational Assimilation of Multiple Spaceborne Datasets for Regional Water and Energy Budgets. Part I: Mathematical Formulation and Sensitivity Tests, Journal of Atmospheric and Oceanic Technology, 2006.
URL : https://hal.archives-ouvertes.fr/hal-00160120

D. Bouniol, A. Protat, and Y. Lemaître, Mesoscale dynamics of a deepening secondary cyclone in FASTEX IOP16: Three-dimensional structure retrieved from dropsonde data, Quarterly Journal of the Royal Meteorological Society, vol.113, issue.561, pp.3535-3562, 1999.
DOI : 10.1002/qj.49712556120

R. W. Burpee, The Origin and Structure of Easterly Waves in the Lower Troposphere of North Africa, Journal of the Atmospheric Sciences, vol.29, issue.1, pp.77-90, 1972.
DOI : 10.1175/1520-0469(1972)029<0077:TOASOE>2.0.CO;2

J. G. Charney, Dynamics of deserts and drought in the Sahel, Quarterly Journal of the Royal Meteorological Society, vol.21, issue.428, pp.193-202, 1975.
DOI : 10.1002/qj.49710142802

T. Chen, Maintenance of the Midtropospheric North African Summer Circulation: Saharan High and African Easterly Jet, Journal of Climate, vol.18, issue.15, pp.2943-2962, 2005.
DOI : 10.1175/JCLI3446.1

M. Chong and D. Hauser, A Tropical Squall Line Observed during the COPT 81 Experiment in West Africa. Part III: Heat and Moisture Budgets, Monthly Weather Review, vol.118, issue.8, pp.1696-1706, 1990.
DOI : 10.1175/1520-0493(1990)118<1696:ATSLOD>2.0.CO;2

K. H. Cook, Large-Scale Atmospheric Dynamics and Sahelian Precipitation, Journal of Climate, vol.10, issue.6, pp.1137-1152, 1997.
DOI : 10.1175/1520-0442(1997)010<1137:LSADAS>2.0.CO;2

K. H. Cook, Generation of the African Easterly Jet and Its Role in Determining West African Precipitation, Journal of Climate, vol.12, issue.5, pp.1165-1184, 1999.
DOI : 10.1175/1520-0442(1999)012<1165:GOTAEJ>2.0.CO;2

K. H. Cook and E. K. Vizy, Coupled Model Simulations of the West African Monsoon System: Twentieth- and Twenty-First-Century Simulations, Journal of Climate, vol.19, issue.15, pp.3681-3703, 2006.
DOI : 10.1175/JCLI3814.1

D. Amato, N. , and T. Lebel, On the characteristics of the rainfall events in the Sahel with a view to the analysis of climatic variability, International Journal of Climatology, vol.245, issue.189, pp.955-974, 1998.
DOI : 10.1002/(SICI)1097-0088(199807)18:9<955::AID-JOC236>3.0.CO;2-6

A. Diongue, J. Lafore, J. Redelsperger, and R. Roca, Numerical study of a Sahelian synoptic weather system: Initiation and mature stages of convection and its interactions with the large-scale dynamics, Quarterly Journal of the Royal Meteorological Society, vol.105, issue.189, pp.1899-1927, 2002.
DOI : 10.1256/003590002320603467

X. K. Dou, G. Scialom, and Y. Lemaître, MANDOP analysis and airborne Doppler radar for mesoscale studies, Quarterly Journal of the Royal Meteorological Society, vol.22, issue.534, pp.1231-1261, 1996.
DOI : 10.1002/qj.49712253402

H. Douville and F. Chauvin, Relevance of soil moisture for seasonal climate predictions: a preliminary study, Climate Dynamics, vol.16, issue.10-11, pp.719-736, 2000.
DOI : 10.1007/s003820000080

L. M. Druyan and T. M. Hall, The Sensitivity of African Wave Disturbances to Remote Forcing, Journal of Applied Meteorology, vol.35, issue.7, pp.1100-1110, 1996.
DOI : 10.1175/1520-0450(1996)035<1100:TSOAWD>2.0.CO;2

A. Elfatih, B. Eltahir, and C. Gong, Dynamics of Wet and Dry Years in West Africa, Journal of Climate, vol.9, pp.1030-1042, 1996.

K. A. Emanuel, On Thermally Direct Circulations in Moist Atmospheres, Journal of the Atmospheric Sciences, vol.52, issue.9, pp.1529-1534, 1995.
DOI : 10.1175/1520-0469(1995)052<1529:OTDCIM>2.0.CO;2

B. Fontaine and S. Janicot, Wind-Field Coherence and Its Variations over West Africa, Journal of Climate, vol.5, issue.5, pp.512-524, 1992.
DOI : 10.1175/1520-0442(1992)005<0512:WFCAIV>2.0.CO;2

B. Fontaine, S. Janicot, and V. Moron, Rainfall Anomaly Patterns and Wind Field Signals over West Africa in August (1958???1989), Journal of Climate, vol.8, issue.6, pp.1503-1510, 1958.
DOI : 10.1175/1520-0442(1995)008<1503:RAPAWF>2.0.CO;2

B. Fontaine and N. Philippon, Seasonal evolution of boundary layer heat content in the West African monsoon from the NCEP/NCAR reanalysis (1968-1998), International Journal of Climatology, vol.123, issue.14, pp.1777-1790, 1968.
DOI : 10.1002/1097-0088(20001130)20:14<1777::AID-JOC568>3.0.CO;2-S

B. Fontaine, S. Louvet, and P. Roucou, Definition and predictability of an OLR-based West African monsoon onset, International Journal of Climatology, vol.5, issue.3, pp.1787-1798, 2008.
DOI : 10.1002/joc.1674

URL : https://hal.archives-ouvertes.fr/hal-00320782

W. M. Frank and J. L. Mcbride, The Vertical Distribution of Heating in AMEX and GATE Cloud Clusters, Journal of the Atmospheric Sciences, vol.46, issue.22, pp.3464-3478, 1989.
DOI : 10.1175/1520-0469(1989)046<3464:TVDOHI>2.0.CO;2

W. M. Frank, H. Wang, and J. L. Mcbride, Rawinsonde Budget Analyses during the TOGA COARE IOP, Journal of the Atmospheric Sciences, vol.53, issue.13, pp.1761-1780, 1996.
DOI : 10.1175/1520-0469(1996)053<1761:RBADTT>2.0.CO;2

G. Gastineau, Les changements de la circulation atmosphérique tropicale et conséquences lors du changement climatique, Thèse de Doctorat, 2008.

M. Gamo, 1996: Thickness of the Dry Convection and Large-Scale Subsidence above Deserts. Boundary-layer Meteorology, pp.265-278

B. Geerts and T. Dejene, Regional and Diurnal Variability of the Vertical Structure of Precipitation Systems in Africa Based on Spaceborne Radar Data, Journal of Climate, vol.18, issue.7, pp.893-915, 2005.
DOI : 10.1175/JCLI-3316.1

J. P. Grist and S. E. Nicholson, A Study of the Dynamic Factors Influencing the Rainfall Variability in the West African Sahel, Journal of Climate, vol.14, issue.7, pp.1337-1359, 2001.
DOI : 10.1175/1520-0442(2001)014<1337:ASOTDF>2.0.CO;2

P. H. Haynes and M. E. Mcintyre, On the Evolution of Vorticity and Potential Vorticity in the Presence of Diabatic Heating and Frictional or Other Forces, Journal of the Atmospheric Sciences, vol.44, issue.5, pp.828-841, 1987.
DOI : 10.1175/1520-0469(1987)044<0828:OTEOVA>2.0.CO;2

P. H. Haynes and M. E. Mcintyre, On the Conservation and Impermeability Theorems for Potential Vorticity, Journal of the Atmospheric Sciences, vol.47, issue.16, pp.2021-2031, 1990.
DOI : 10.1175/1520-0469(1990)047<2021:OTCAIT>2.0.CO;2

K. I. Hodges and C. D. Thorncroft, Distribution and Statistics of African Mesoscale Convective Weather Systems Based on the ISCCP Meteosat Imagery, Monthly Weather Review, vol.125, issue.11, pp.2821-2837, 1997.
DOI : 10.1175/1520-0493(1997)125<2821:DASOAM>2.0.CO;2

R. A. Houze, Cloud Cluster and Large-Scale Vertical Motions in the Tropics, Journal of the Meteorological Scociety of Japan, vol.60, pp.391-410, 1982.

G. J. Huffman, R. F. Adler, B. Rudolf, U. Schneider, and P. R. Keehn, Global Precipitation Estimates Based on a Technique for Combining Satellite-Based Estimates, Rain Gauge Analysis, and NWP Model Precipitation Information, Journal of Climate, vol.8, issue.5, pp.1284-1295, 1995.
DOI : 10.1175/1520-0442(1995)008<1284:GPEBOA>2.0.CO;2

R. W. Hutjes, P. Kabat, S. W. Running, W. J. Shuttleworth, C. Field et al., Biospheric Aspects of the Hydrological Cycle, Journal of Hydrology, vol.212, issue.213, pp.212-213, 1998.
DOI : 10.1016/S0022-1694(98)00255-8

I. Jobard, F. Chopin, J. Bergès, A. Ali, T. Lebel et al., Presentation of the EPSAT-SG method and comparison with other satellite precipitation estimations in the frame of Precip-AMMA, Geophysical Research Abstracts, vol.9, p.10062, 2007.

S. Janicot, C. D. Thorncroft, A. Ali, N. G. Ascencio, O. Berry et al., Large-scale overview of the summer monsoon over West Africa during the AMMA field experiment in 2006, Annales Geophysicae, vol.26, issue.9, pp.2569-2595, 2006.
DOI : 10.5194/angeo-26-2569-2008

URL : https://hal.archives-ouvertes.fr/insu-00388742

R. H. Johnson and G. S. Young, Heat and Moisture Budgets of Tropical Mesoscale Anvil Clouds, Journal of the Atmospheric Sciences, vol.40, issue.9, pp.2138-2147, 1983.
DOI : 10.1175/1520-0469(1983)040<2138:HAMBOT>2.0.CO;2

R. H. Johnson, Partitioning Tropical Heat and Moisture Budgets into Cumulus and Mesoscale Components: Implications for Cumulus Parameterization, Monthly Weather Review, vol.112, issue.8, pp.1590-1601, 1984.
DOI : 10.1175/1520-0493(1984)112<1590:PTHAMB>2.0.CO;2

D. Jenne and . Joseph, The NCEP/NCAR 40-Years Reanalysis Project, Bulletin American Meteorological Society, vol.77, pp.437-471, 1996.

J. M. Kowal and D. T. Knabe, An Agroclimatological Atlas of the Northern States of Nigeria with Explanatory Notes, 1972.

T. N. Krishnamurti and H. N. Bhalme, Oscillations of a Monsoon System. Part I. Observational Aspects, Journal of the Atmospheric Sciences, vol.33, issue.10, pp.1937-1954, 1976.
DOI : 10.1175/1520-0469(1976)033<1937:OOAMSP>2.0.CO;2

J. Lafore, M. W. Et, and . Moncrieff, A Numerical Investigation of the Organization and Interaction of the Convective and Stratiform Region of Tropical Squall Lines, Journal of the Atmospheric Sciences, vol.46, pp.521-544, 1989.

L. Bardé, L. , T. Lebel, and D. Tapsoba, Rainfall Variability in West Africa during the Years 1950-90, Journal of Climate, vol.15, pp.187-202, 2002.

T. Lebel, F. Delclaux, L. L. Bardé, and J. Polcher, From MCG Scales to Hydrological Scales: Rainfall Variability in West Africa, Stoch. Env. Risk. Ass, 2000.

D. R. Legates and C. J. Willmott, Mean seasonal and spatial variability in gauge-corrected, global precipitation, International Journal of Climatology, vol.68, issue.2, pp.111-127, 1990.
DOI : 10.1002/joc.3370100202

Y. Lemaître, Etude Thermodynamique et Dynamique des Lignes de Grains Tropicales Observées à Korohogo Pendant l'Expérience COPT 79, Thèse de Doctorat, 1981.

Y. Lemaître, Etude Dynamique et Thermodynamique de Lignes de Grains Tropicales Observées à Korhogo pendant l'Expérience COPT 81, Journal de la Recherche Atmosphérique, vol.16, pp.47-69, 1982.

Y. Lemaître and J. Testud, Observation and Modelling of Tropical Squall Lines Observed during the "COPT 79" Experiment, Annales Geophysicae, vol.4, pp.21-36, 1986.

Y. Lemaître, P. Neveu, and G. Scialom, A New Analysis to Diagnose Ageostrophic Winds from Wind and Temperature Measurements Made by an Observational Network, Journal of Atmospheric and Oceanic Technology, vol.11, issue.3, pp.637-660, 1994.
DOI : 10.1175/1520-0426(1994)011<0637:ANATDA>2.0.CO;2

Y. Lemaître, A. Protat, and G. Scialom, Dynamics of a « Bomb Like » Deepening Secondary Cyclone from Airborne Doppler Radar, Quarterly Journal of the Royal Meteorological Society, vol.125, pp.2797-2817, 1999.

L. 'hôte, Y. , G. Mahé, B. Somé, and J. Triboulet, Analysis of a Sahelian annual rainfall index from 1896 to 2000; the drought continues, Hydrological Sciences Journal, vol.325, issue.4, pp.563-572, 2000.
DOI : 10.2307/2346729

A. G. Liang, R. Carbone, V. Levizzani, and J. Tuttle, The propagation and diurnal cycles of deep convection in northern tropical Africa, Quarterly Journal of the Royal Meteorological Society, vol.129, issue.189, pp.163-176, 2008.
DOI : 10.1002/qj.194

X. Lin and R. H. Johnson, Heating, Moistening, and Rainfall over the Western Pacific Warm Pool during TOGA COARE, Journal of the Atmospheric Sciences, vol.53, issue.22, pp.3367-3383, 1996.
DOI : 10.1175/1520-0469(1996)053<3367:HMAROT>2.0.CO;2

V. Mathon and H. Laurent, Life cycle of Sahelian mesoscale convective cloud systems, Quarterly Journal of the Royal Meteorological Society, vol.19, issue.14, pp.377-406, 2001.
DOI : 10.1002/qj.49712757208

V. Mathon and H. Laurent, Mesoscale Convective System Rainfall in the Sahel, Journal of Applied Meteorology, vol.41, issue.11, pp.1081-1092, 2002.
DOI : 10.1175/1520-0450(2002)041<1081:MCSRIT>2.0.CO;2

T. L. Miller, The structures and energetics of fully nonlinear symmetric baroclinic waves, Journal of Fluid Mechanics, vol.48, issue.-1, pp.343-362, 1955.
DOI : 10.1017/S0022112075001218

K. I. Mohr and C. D. Thorncroft, Intense convective systems in West Africa and their relationship to the African easterly jet, Quarterly Journal of the Royal Meteorological Society, vol.122, issue.614, pp.163-176, 2006.
DOI : 10.1256/qj.05.55

M. W. Moncrieff and M. J. Miller, The dynamics and simulation of tropical cumulonimbus and squall lines, Quarterly Journal of the Royal Meteorological Society, vol.8, issue.432, pp.373-394, 1976.
DOI : 10.1002/qj.49710243208

D. Monkam, Convective available potential energy (CAPE) in Northern Africa and tropical Atlantic and study of its connections with rainfall in Central and West Africa during Summer 1985, Atmospheric Research, vol.62, issue.1-2, pp.125-147, 1985.
DOI : 10.1016/S0169-8095(02)00006-6

T. Montmerle and Y. Lemaître, Three-Dimensional Variational Data Analysis to Retrieve Thermodynamical and Dynamical Fields from Various Nested Wind Measurements, Journal of Atmospheric and Oceanic Technology, vol.15, issue.2, pp.360-379, 1998.
DOI : 10.1175/1520-0426(1998)015<0360:TDVDAT>2.0.CO;2

R. E. Newell and J. W. Kidson, African mean wind changes between sahelian wet and dry periods, Journal of Climatology, vol.255, issue.1, pp.27-33, 1984.
DOI : 10.1002/joc.3370040103

S. E. Nicholson and J. P. Grist, The Seasonal Evolution of the Atmospheric Circulation over West Africa and Equatorial Africa, Journal of Climate, vol.16, issue.7, pp.1013-1030, 2003.
DOI : 10.1175/1520-0442(2003)016<1013:TSEOTA>2.0.CO;2

T. Nitta, Response of Cumulus Updraft and Downdraft to GATE A/B-Scale Motion Systems, Journal of the Atmospheric Sciences, vol.34, issue.8, pp.1163-1186, 1977.
DOI : 10.1175/1520-0469(1977)034<1163:ROCUAD>2.0.CO;2

M. Nuret, J. Lafore, O. Bock, F. Guichard, A. Agusti-panareda et al., Correction of Humidity Bias for Vaisala RS80-A Sondes during the AMMA 2006 Observing Period, Journal of Atmospheric and Oceanic Technology, vol.25, issue.11, pp.2152-2158, 2008.
DOI : 10.1175/2008JTECHA1103.1

URL : https://hal.archives-ouvertes.fr/meteo-00362749

O. 'brien and J. J. , Alternative Solutions to the Classical Vertical Velocity Problem, Journal of Applied Meteorology, vol.9, issue.2, pp.197-203, 1970.
DOI : 10.1175/1520-0450(1970)009<0197:ASTTCV>2.0.CO;2

Y. Ogura and H. Cho, Diagnostic Determination of Cumulus Cloud Populations from Observed Large-Scale Variables, Journal of the Atmospheric Sciences, vol.30, issue.7, pp.1276-1286, 1973.
DOI : 10.1175/1520-0469(1973)030<1276:DDOCCP>2.0.CO;2

P. Peyrillé, Etude Idéalisé de la Mousson Ouest Africaine à Partir d'un Modèle Numérique Bi-Dimentionnel, Thèse de Doctorat, 2006.

N. Philippon and B. Fontaine, The relationship between the Sahelian and previous 2nd Guinean rainy seasons: a monsoon regulation by soil wetness?, Annales Geophysicae, vol.20, issue.4, pp.575-582, 2002.
DOI : 10.5194/angeo-20-575-2002

URL : https://hal.archives-ouvertes.fr/hal-00329235

M. Pidwirny, Upper Air Winds and the Jet Streams. Fundamentals of Physical Geography, 2006.

A. Protat, Processus d'Interaction Entre les Différentes Echelles de Mouvement au Sein du Système Convectif Observe le 15 Décembre 1992 lors de l'Expérience TOGA-COARE, Thèse de Doctorat, 1996.

A. Protat, Y. Lemaître, and G. Scialom, Thermodynamic analytic fields from Doppler-radar data by means of the MANDOP analysis, Quarterly Journal of the Royal Meteorological Society, vol.73, issue.549, pp.1633-1668, 1998.
DOI : 10.1002/qj.49712454914

A. Protat and Y. Lemaître, Scale Interactions Involved in the Initiation, Structure, and Evolution of the 15 December 1992 MCS Observed during TOGA COARE. Part I: Synoptic-Scale Processes, Monthly Weather Review, vol.129, issue.8, pp.1757-1778, 2001.
DOI : 10.1175/1520-0493(2001)129<1757:SIIITI>2.0.CO;2

A. Protat and Y. Lemaître, Scale Interaction Processes Involved in the Initiation, Structure and Evolution of the 15, M.C.S. Observed during TOGA-CORE Part II: Mesoscale and Convective-Scale Processes. Monthly Weather Review, pp.1779-1808, 1992.

C. S. Ramage, Monsoon meteorology, 1971.

J. Redelsperger, A. Diongue, A. Diedhou, J. Ceron, M. Diop et al., Multi-scale description of a Sahelian synoptic weather system representative of the West African monsoon, Quarterly Journal of the Royal Meteorological Society, vol.105, issue.582, pp.1229-1257, 2002.
DOI : 10.1256/003590002320373274

R. J. Reed, D. C. Norquist, and E. E. Recker, The Structure and Properties of African Wave Disturbances as Observed During Phase III of GATE, Monthly Weather Review, vol.105, issue.3, pp.317-333, 1977.
DOI : 10.1175/1520-0493(1977)105<0317:TSAPOA>2.0.CO;2

E. Reiter, Tropospheric circulation and jet streams. Climate of the Free Atmosphere, World Survey of Climatology, vol.4, pp.85-203, 1969.

R. Roca, J. Lafore, C. Piriou, and J. Redelsperger, Extratropical Dry-Air Intrusions into the West African Monsoon Midtroposphere: An Important Factor for the Convective Activity over the Sahel, Journal of the Atmospheric Sciences, vol.62, issue.2, pp.390-407, 2005.
DOI : 10.1175/JAS-3366.1

D. P. Rowell and J. R. Milford, On the Generation of African Squall Lines, Journal of Climate, vol.6, issue.6, pp.1181-1193, 1993.
DOI : 10.1175/1520-0442(1993)006<1181:OTGOAS>2.0.CO;2

C. Schär, A Generalization of Bernoulli's Theorem, Journal of the Atmospheric Sciences, vol.50, issue.10, pp.1437-1443
DOI : 10.1175/1520-0469(1993)050<1437:AGOBT>2.0.CO;2

C. Schär, D. Lüthi, U. Beyerle, and E. Heise, The Soil???Precipitation Feedback: A Process Study with a Regional Climate Model, Journal of Climate, vol.12, issue.3, pp.722-741, 1998.
DOI : 10.1175/1520-0442(1999)012<0722:TSPFAP>2.0.CO;2

S. Schubert, C. Park, and D. Lamich, An Assimilated Dataset for Earth Science Applications, Bulletin of the American Meteorological Society, vol.74, issue.12, pp.2331-2342, 1993.
DOI : 10.1175/1520-0477(1993)074<2331:AADFES>2.0.CO;2

C. Schumacher, P. E. Ciesielski, and M. H. Zhang, Tropical Cloud Heating Profiles: Analysis from KWAJEX, Monthly Weather Review, vol.136, issue.11, pp.4289-4300, 2008.
DOI : 10.1175/2008MWR2275.1

G. Scialom and Y. Lemaître, A New Analysis for the Retrieval of Three-Dimensional Mesoscale Wind Fields from Multiple Doppler Radar, Journal of Atmospheric and Oceanic Technology, vol.7, issue.5, pp.640-665, 1990.
DOI : 10.1175/1520-0426(1990)007<0640:ANAFTR>2.0.CO;2

Y. V. Serafini, The time scale of land surface hydrology in response to initial soil moisture anomalies: a case study, Tellus A: Dynamic Meteorology and Oceanography, vol.112, issue.3, pp.390-400, 1990.
DOI : 10.3402/tellusa.v42i3.11885

E. Smith, The Structure of the Arabian Heat Low. Part II: Bulk Tropospheric Heat Budget and Implications, Monthly Weather Review, vol.114, issue.6, pp.1084-1102, 1989.
DOI : 10.1175/1520-0493(1986)114<1084:TSOTAH>2.0.CO;2

B. Sultan and S. Janicot, Abrupt shift of the ITCZ over West Africa and intra-seasonal variability, Geophysical Research Letters, vol.40, issue.20, pp.3353-3356, 2000.
DOI : 10.1029/1999GL011285

URL : https://hal.archives-ouvertes.fr/hal-00162239

B. Sultan, Etude de la Mise en Place de la Mousson en Afrique de l'Ouest et de la Variabilité Intra Saisonnière de la Convection. Applications à la Sensibilité des Rendements Agricoles, Thèse de Doctorat, 2002.

B. Sultan, S. Janicot, and A. Diedhiou, The West African Monsoon Dynamics. Part I: Documentation of Intraseasonal Variability, Journal of Climate, vol.16, issue.21, pp.3389-3406, 2003.
DOI : 10.1175/1520-0442(2003)016<3389:TWAMDP>2.0.CO;2

URL : https://hal.archives-ouvertes.fr/hal-00155510

B. Sultan and S. Janicot, The West African Monsoon Dynamics. Part II: The ???Preonset??? and ???Onset??? of the Summer Monsoon, Journal of Climate, vol.16, issue.21, pp.3407-3427, 2003.
DOI : 10.1175/1520-0442(2003)016<3407:TWAMDP>2.0.CO;2

URL : https://hal.archives-ouvertes.fr/hal-00155510

M. V. Sivakumar, Predicting rainy season potential from the onset of rains in Southern Sahelian and Sudanian climatic zones of West Africa, Agricultural and Forest Meteorology, vol.42, issue.4, pp.295-305, 1988.
DOI : 10.1016/0168-1923(88)90039-1

P. Tabary and G. Scialom, MANDOP Analysis over Complex Orography in the Context of the MAP Experiment, Journal of Atmospheric and Oceanic Technology, vol.18, issue.8, pp.1293-1314, 2001.
DOI : 10.1175/1520-0426(2001)018<1293:MAOCOI>2.0.CO;2

W. Tao, J. Simpson, C. Sui, B. Ferrier, S. Lang et al., Heating, Moisture, and Water Budgets of Tropical and Midlatitude Squall Lines: Comparisons and Sensitivity to Longwave Radiation, Journal of the Atmospheric Sciences, vol.50, issue.5, pp.673-690, 1993.
DOI : 10.1175/1520-0469(1993)050<0673:HMAWBO>2.0.CO;2

R. M. Thompson, S. W. Jr, E. E. Payne, R. J. Recker, and . Reed, Structure and Properties of Synoptic-Scale Wave Disturbances in the Intertropical Convergence Zone of the Eastern Atlantic, Journal of the Atmospheric Sciences, vol.36, issue.1, pp.53-72, 1979.
DOI : 10.1175/1520-0469(1979)036<0053:SAPOSS>2.0.CO;2

C. D. Thorncroft and M. Blackburn, Maintenance of the African easterly jet, Quarterly Journal of the Royal Meteorological Society, vol.30, issue.555, pp.763-786, 1999.
DOI : 10.1002/qj.49712555502

L. W. Uccellini and D. R. Johnson, The Coupling of Upper and Lower Tropospheric Jet Streaks and Implications for the Development of Severe Convective Storms, Monthly Weather Review, vol.107, issue.6, pp.682-703, 1979.
DOI : 10.1175/1520-0493(1979)107<0682:TCOUAL>2.0.CO;2

S. M. Uppala, P. W. Kallberg, A. J. Simmons, U. Andrae, V. Da-costa-bechtold et al., The ERA-40 re-analysis, Quarterly Journal of the Royal Meteorological Society, vol.132, issue.612, pp.2961-3012, 2005.
DOI : 10.1256/qj.04.176

P. Webster, V. Magana, T. Palmer, J. Shukla, A. Tomas et al., Monsoons: Processes, predictability, and the prospects for prediction, Monsoons: Processes, Predictability, and the Prospects for Prediction, pp.14451-14510, 1998.
DOI : 10.1029/97JC02719

F. White, La végétation d'Afrique. Mémoire accompagnant la carte de végétation de l'Afrique, Collection Recherches sur les ressources naturelles, pp.384-388, 1981.

S. Yang and E. A. Smith, Vertical Structure and Transient Behavior of Convective???Stratiform Heating in TOGA COARE from Combined Satellite???Sounding Analysis, Journal of Applied Meteorology, vol.39, issue.9, pp.1491-1513, 2000.
DOI : 10.1175/1520-0450(2000)039<1491:VSATBO>2.0.CO;2

M. Yania, S. Esbensen, and J. Chu, Determination of Bulk Properties of Tropical Cloud Clusters from Large-Scale Heat and Moisture Budgets, Journal of the Atmospheric Sciences, vol.30, issue.4, pp.611-627, 1973.
DOI : 10.1175/1520-0469(1973)030<0611:DOBPOT>2.0.CO;2

D. Zhang and J. M. Fritsch, Numerical Simulation of the Meso-?? Scale Structure and Evolution of the 1977 Johnstown Flood. Part II: Inertially Stable Warm-Core Vortex and the Mesoscale Convective Complex, Journal of the Atmospheric Sciences, vol.44, issue.18, pp.2593-2612, 1987.
DOI : 10.1175/1520-0469(1987)044<2593:NSOTMS>2.0.CO;2

D. Zhang and J. M. Fritsch, Numerical Sensitivity Experiments of Varying Model Physics on the Structure, Evolution and Dynamics of Two Mesoscale Convective Systems, Journal of the Atmospheric Sciences, vol.45, issue.2, pp.261-293, 1988.
DOI : 10.1175/1520-0469(1988)045<0261:NSEOVM>2.0.CO;2

D. Zhang and J. M. Fritsch, A Numerical Investigation of a Convectively Generated, Inertially Stable, Extratropical Warm-Core Mesovortex over Land. Part I: Structure and Evolution, Monthly Weather Review, vol.116, issue.12, pp.2660-2687, 1988.
DOI : 10.1175/1520-0493(1988)116<2660:ANIOAC>2.0.CO;2

X. Zheng, A. Elfatih, and B. Eltahir, The Role of Vegetation in the Dynamics of West African Monsoons, Journal of Climate, vol.11, issue.8, pp.2078-2096, 1998.
DOI : 10.1175/1520-0442-11.8.2078