West african monsoon intraseasonal variability: A precipitable water perspective

Journal of the Atmospheric Sciences

Volumn 70, Issue 4, 2013, Pages 1035-1052

  Emmanuel Poan, D ^a,b   Roehrig, Romain ^a,b   Couvreux, Fleur ^a,b   Lafore, Jean Philippe ^a,b  

^a CNRM GAME   (France)

^b CNRS   (France)

Author keywords

Advection; Anomalies; Atmospheric; Intraseasonal variability; Moisture moisture budget; Waves

Indexed keywords

AFRICAN EASTERLY JET; AFRICAN EASTERLY WAVES; ANOMALIES; CONVECTIVE ACTIVITY; INTRASEASONAL VARIABILITY; MOISTURE/MOISTURE BUDGETS; PRECIPITABLE WATER; WEST AFRICAN MONSOON;

ADVECTION; ATMOSPHERICS; BUDGET CONTROL; DROUGHT; FOOD SUPPLY; MOISTURE; WAVES;

CLIMATE CHANGE;

ADVECTION; ANOMALY; ATMOSPHERIC MOISTURE; EASTERLY WAVE; GPS; JET STREAM; MONSOON; PRECIPITABLE WATER; SEASONAL VARIATION; SYNOPTIC METEOROLOGY;

SAHEL [SUB-SAHARAN AFRICA]; WEST AFRICA;

EID: 84877646367     PISSN: 00224928     EISSN: 15200469     Source Type: Journal    
DOI: 10.1175/JAS-D-12-087.1     Document Type: Article

References (49)

1. Barthe, C, N. Asencio, J.-P. Lafore, M. Chong, B. Campistron, and F. Cazenave, 2010: Multi-scale analysis of the 25-27 July 2006 convective period over Niamey: Comparison between Doppler radar observations and simulations. Quart. J. Roy. Meteor. Soc., 136 (Suppl.), 190-208.
2. Bock, O., and M. Nuret, 2009: Verification of NWP model analyses and radiosonde humidity data with GPS precipitable water vapor estimates during AMMA. Wea. Forecasting, 24, 10851101.
3. Bock, O., and Coauthors, 2008: West African Monsoon observed with ground-based GPS receivers during African Monsoon Multi-disciplinary Analysis (AMMA). J. Geophys. Res., 113, D21105, doi:10.1029/2008JD010327.
4. Bretherton, C. S., M. E. Peters, and L. E. Back, 2004: Relationships between water vapor path and precipitation over the tropical oceans. J. Climate, 17,1517-1528.
5. Brown, R. G., and C. D. Zhang, 1997: Variability of midtropo-spheric moisture and its effect on cloud-top height distribution during TOGA COARE. J. Atmos. Sci., 54, 2760-2774.
6. Cadet, D. L., and S. H. Houston, 1984: Precipitable water over West Africa and the Eastern/Central Atlantic Ocean during summer 1979. J. Meteor. Soc. Japan, 62, 761-774.
7. Cadet, D. L., and N. O. Nnoli, 1987: Water vapour transport over Africa and the Atlantic Ocean during summer 1979. Quart. J. Roy. Meteor. Soc., 113, 581-602.
8. Caniaux, G., J.-L. Redelsperger, and J.-P. Lafore, 1994: A numerical study of the stratiform region of a fast-moving squall line. Part I: General description and water and heat budgets. J. Atmos. Sci., 51, 2046-2074.
9. Chong, M., and D. Hauser, 1989: A tropical squall line observed during the COPT 81 experiment in West Africa. Part II: Water budget. Mon. Wea. Rev., 117, 728-744.
10. Cornforth, R. J., B. J. Hoskins, and C. D. Thorncroft, 2009: The impact of moist processes on the African easterly jet-African easterly wave system. Quart. J. Roy. Meteor. Soc., 135, 894-913.
11. Couvreux, F., F. Guichard, O. Bock, B. Campistron, J.-P. Lafore, and J.-L. Redelsperger, 2010: Synoptic variability of the monsoon flux over West Africa prior to the onset. Quart. J. Roy. Meteor. Soc., 136 (Suppl.), 160-174.
12. Diongue, A., J.-P. Lafore, J.-L. Redelsperger, and R. Roca, 2002: Numerical study of a Sahelian synoptic weather system: Initiation and mature stages of convection and its interactions with the large-scale dynamics. Quart. J. Roy. Meteor. Soc., 128, 1899-1928.
13. Duchon, C. E., 1979: Lanczos filtering in one and two dimensions. J. Appl. Meteor., 18, 1016-1022.
14. Fink, A., and A. Reiner, 2003: Spatiotemporal variability of the relation between African easterly waves and West African squall lines in 1998 and 1999. J. Geophys. Res., 108, 4332, doi:10.1029/2002JD002816.
15. Hall, N. M. J., G. N. Kiladis, and C. D. Thorncroft, 2006: Three-dimensional structure and dynamics of African easterly waves. Part II: Dynamical modes. J. Atmos. Sci., 63, 2231-2245.
16. Holloway, C. E., and J. D. B. Neelin, 2010: Temporal relations of column water vapor and tropical precipitation. J. Atmos. Sci., 67, 1091-1105.
17. Huffman, G. J., R. F. Adler, M. M. Morrissey, D. T. Bolvin, S. Curtis, R. Joyce, B. McGavock, and J. Susskind, 2001: Global precipitation at one degree daily resolution from multisatellite observations. J. Hydrometeor., 2, 36-50.
18. Janicot, S., and Coauthors, 2008: Large-scale overview of the summer monsoon over West Africa during the AMMA field experiment in 2006. Ann. Geophys., 26, 2569-2595.
19. Janicot, S., F. Mounier, N. M. J. Hall, S. Leroux, B. Sultan, and G. N. Kiladis, 2009: The West African monsoon dynamics. Part IV: Analysis of the 25-90-day variability of convection and the role of the Indian monsoon. J. Climate, 22, 1541-1565.
20. Janicot, S., F. Mounier, S. Gervois, S. Benjamin, and G. N. Kiladis, 2010: The dynamics of the West African monsoon. Part V: The detection and role of the dominant modes of convectively coupled equatorial Rossby waves. J. Climate, 23, 4005-4024.
21. Janicot, S., and Coauthors, 2011: Intraseasonal variability of the West African monsoon. Atmos. Sci. Lett., 12, 58-66.
22. Johnson, R. H., 1984: Partitioning tropical heat and moisture budgets into cumulus and mesoscale components: Implications for cumulus parameterization. Mon. Wea. Rev., 112, 1590-1601.
23. Kanamitsu, M., W. Ebisuzaki, J. Woollen, S.-K. Yang, J. J. Hnilo, M. Fiorino, and G. L. Potter, 2002: NCEP-DOE AMIP-II Reanalysis (R-2). Bull. Amer. Meteor. Soc., 83, 1631-1643.
24. Kiladis, G. N., C. D. Thorncroft, and N. M. J. Hall, 2006: Three-dimensional structure and dynamics of African easterly waves. Part I: Observations. J. Atmos. Sci., 63, 2212-2230.
25. Lafore, J.-P., and M. W. Moncrieff, 1989: A numerical investigation of the organization and interaction of the convective and stratiform regions of tropical squall lines. J. Atmos. Sci., 46, 521-544.
26. Lafore, J.-P., J.-L. Redelsperger, and G. Jaubert, 1988: Comparison between a three-dimensional simulation and Doppler radar data of a tropical squall line: Transports of mass, momentum, heat, and moisture. J. Atmos. Sci., 45, 3483-3500.
27. Leary, C. A., and R. A. Houze, 1980: The contribution of mesoscale motions to the mass and heat fluxes of an intense tropical convective system. J. Atmos. Sci., 37,784-796.
28. Liebmann, B., and C. A. Smith, 1996: Description of a complete (interpolated) outgoing longwave radiation dataset. Bull. Amer. Meteor. Soc., 77, 1275-1277.
29. Lothon, M., B. Campistron, M. Chong, F. Couvreux, F. Guichard, C. Rio, and E. Williams, 2011: Life cycle of a mesoscale circular gust front observed by a C-band Doppler radar in West Africa. Mon. Wea. Rev., 139,1370-1388.
30. Mapes, B. E., R. Milliff, and J. Morzel, 2009: Composite life cycle of maritime tropical mesoscale convective systems in scatter-ometer and microwave satellite observations. J. Atmos. Sci., 66,199-208.
31. Matthews, A. J., 2004: Intraseasonal variability over tropical Africa during northern summer. J. Climate, 17, 2427-2440.
32. Mounier, F., and S. Janicot, 2004: Evidence of two independent modes of convection at intraseasonal timescale in the West African summer monsoon. Geophys. Res. Lett., 31, L16116, doi:10.1029/2004GL020665.
33. Mounier, F., and S. Janicot, and G. N. Kiladis, 2008: The West African monsoon dynamics. Part III: The quasi-biweekly zonal dipole. J. Climate, 21,1911-1928.
34. Neelin, J., O. Peters, and K. Hales, 2009: The transition to strong convection. J. Atmos. Sci., 66, 2367-2384.
35. Parsons, D. B., J.-L. Redelsperger, and K. Yoneyama, 2000: The evolution of the tropical Western Pacific atmosphere-ocean system following the arrival of a dry intrusion. Quart. J. Roy. Meteor. Soc., 126, 517-548.
36. Redelsperger, J.-L., A. Diongue, A. Diedhiou, J.-P. Ceron, M. Diop, J.-F. Gueremy, and J.-P. Lafore, 2002: Multi-scale description of a Sahelian synoptic weather system representative of the West African Monsoon. Quart. J. Roy. Meteor. Soc., 128,1229-1257.
37. Reed, R. J., D. C. Norquist, and E. E. Recker, 1977: The structure and properties of African wave disturbances as observed during Phase III of GATE. Mon. Wea. Rev., 105, 317-333.
38. Roca, R., R. Guzman, J. Lemond, J. Meijers, L. Picon, and H. Brogniez, 2011: Tropical and extra-tropical influences on the distribution of free tropospheric humidity over the in-tertropical belt. Surv. Geophys., 33, 565-583.
39. Roehrig, R., F. Chauvin, and J.-P. Lafore, 2011: 10-25-day intraseasonal variability of convection over the Sahel: A role of the Saharan heat low and midlatitudes. J. Climate, 24,5863-5878.
40. Schwendike, J., and S. C. Jones, 2010: Convection in an African Easterly Wave over West Africa and the eastern Atlantic: A model case study of Helene (2006). Quart. J. Roy. Meteor. Soc., 136 (Suppl.), 364-396.
41. Sherwood, S. C., 1999: Convective precursors and predictability in the tropical western Pacific. Mon. Wea. Rev., 127, 2977-2991.
42. Sherwood, S. C., P. Minnis, and M. McGill, 2004: Deep convective cloud-top heights and their thermodynamic control during CRYSTAL-FACE. J. Geophys. Res., 109, D20119, doi:10.1029/2004JD004811.
43. Simmons, A., S. Uppala, D. Dee, and S. Kobayashi, 2007: ERA-Interim: New ECMWF reanalysis products from 1989 on wards. ECMWF Newsletter, No. 110, ECMWF, Reading, United Kingdom, 26-35.
44. Smull, B. F., and R. A. Houze Jr., 1987: Rear inflow in squall lines with trailing stratiform precipitation. Mon. Wea. Rev., 115, 2869-2889.
45. Sultan, B., C. Baron, M. Dingkuhn, and S. Janicot, 2005: Agricultural impacts of large-scale variability of the West African monsoon. Agric. For. Meteor., 128, 93-110.
46. Thorncroft, C. D., and B. J. Hoskins, 1994: An idealized study of African easterly waves. II: A nonlinear view. Quart. J. Roy. Meteor. Soc., 120, 983-1015.
47. Thorncroft, C. D., and M. Blackburn, 1999: Maintenance of the African easterly jet. Quart. J. Roy. Meteor. Soc., 125, 763-786.
48. Yanai, M., S. Esbensen, and J. H. Chu, 1973: Determination of bulk properties of tropical cloud clusters from large-scale heat and moisture budgets. J. Atmos. Sci., 30, 611-627.
49. Zelinka, M. D., and D. L. Hartmann, 2009: Response of humidity and clouds to tropical deep convection. J. Climate, 22, 2389-2404.