Generation of African easterly wave disturbances: Relationship to the African easterly jet

Monthly Weather Review

Volumn 133, Issue 5, 2005, Pages 1311-1327

  Hsieh, Jen Shan ^a   Cook, Kerry H ^a  

^a Institute for the Study of the Continents   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

BOUNDARY CONDITIONS; COMPUTER SIMULATION; HEAT CONVECTION; JETS; MATHEMATICAL MODELS; SURFACE WAVES;

AFRICAN EASTERLY WAVES; CLIMATE SIMULATIONS; CONVECTIVE HEATING; SURFACE BOUNDARY CONDITIONS;

CLIMATOLOGY;

EASTERLY WAVE; INTERTROPICAL CONVERGENCE ZONE; JET FLOW;

AFRICA; EASTERN HEMISPHERE; WORLD;

EID: 20444471586     PISSN: 00270644     EISSN: None     Source Type: Journal    
DOI: 10.1175/MWR2916.1     Document Type: Article

References (54)

1. Avila, L. A., and G. B. Clark, 1989: Atlantic tropical systems of 1988. Mon. Wea. Rev., 117, 2260-2265.
2. Avila, L. A., and R. J. Pasch, 1992: Atlantic tropical system of 1991. Mon. Wea. Rev., 120, 2688-2696.
3. Blackadar, A. K., 1979: High resolution models of the planetary boundary layer. Advances in Environonmental Science and Engineering, Vol. 1, No. 1, J. Pfafflin and E. Ziegler, Eds., Gordon and Breach Science, 50-85.
4. Burpee, R. W., 1972: The origin and structure of easterly waves in the lower troposphere of North Africa. J. Atmos. Sci., 29, 77-90.
5. Burpee, R. W., 1974: Characteristics of North African easterly waves during the summers of 1968 and 1969. J. Atmos. Sci., 31, 1556-1570.
6. Burpee, R. W., 1975: Some features of synoptic-scale waves based on compositing analysis of GATE data. Mon. Wea. Rev., 103, 921-925.
7. Carlson, T. N., 1969: Some remarks on African disturbances and their progress over the tropical Atlantic. Mon. Wea. Rev., 97, 716-726.
8. Chang, C. B., 1993: Impact of desert environment on the genesis of African wave disturbances. J. Atmos. Sci., 50, 2137-2145.
9. Charney, J. G., and M. E. Stern, 1962: On the stability of internal baroclinic jets in a rotating atmosphere. J. Atmos. Sci., 19, 1165-1184.
10. Cook, K. H., 1999: Generation of the African easterly jet and its role in determining West African precipitation. J. Climate, 12, 1165-1184.
11. Cook, K. H., X. Yang, C. M. Carter, and B. N. Belcher, 2003: A modeling system for studying climatic controls on mountain glaciers with application to the Patagonian ice fields. Climate Change, 56, 339-367.
12. Dickinson, M., and J. Molinari, 2000: Climatology of sign reversals of the meridional potential vorticity gradient over Africa and Australia. Mon. Wea. Rev., 128, 3890-3900.
13. Diedhiou, A., S. Janicot, A. Viltard, and P. de Felice, 1998: Evidence of two regimes of easterly waves over West Africa and the tropical Atlantic. Geophys. Res. Lett., 25, 2805-2808.
14. Diedhiou, A., S. Janicot, A. Viltard, and P. de Felice, 1999: Easterly wave regimes and associated convection over West Africa and tropical Atlantic: Results from the NCEP/NCA and ECMWF reanalyses. Climate Dyn, 15, 795-822.
15. Diedhiou, A., S. Janicot, A. Viltard, and P. de Felice, 2001: Composite patterns of easterly disturbances over West Africa and the tropical Atlantic: A climatology from the 1979-95 NCEP/NCAR reanalysis. Climate Dyn, 18, 241-253.
16. Diedhiou, A., S. Janicot, A. Viltard, and P. de Felice, 2002: Energetics of easterly wave disturbances over West Africa and the tropical Atlantic: A climatology from 1979-95 NCEP/NCAR reanalyses. Climate Dyn, 18, 487-500.
17. Druyan, L. M., and M. B. Fulakeza, 2000: Regional model simulations of African wave disturbances. J. Geophys. Res., 105, 7231-7255.
18. Druyan L. M., M. Fulakeza, P. Lonergan, and M. Saloum, 2001: A regional model study of synoptic features over West Africa. Mon. Wea. Rev., 129, 1564-1577.
19. Dudhia, J., 1989: Numerical study of convection observed during the winter monsoon experiment using a two-dimensional model. J. Atmos. Sci., 46, 3077-3107.
20. Eliassen, A., 1983: The Charney-Stern theorem on barotropic-baroclinic instability. Pure Appl. Geophys., 121, 563-573.
21. Ferreira, R. N., and W. H. Schubert, 1997: Barotropic aspects of ITCZ breakdown. J. Atmos. Sci., 54, 261-285.
22. Fjörtoft, R., 1950: Application of integral theorems in deriving criteria of stability for larminar flows and for the baroclinic circular vortex. Geofis. Publ., 17 (6), 5-52.
23. Frank, N. L., 1970: Atlantic tropical systems of 1969. Mon. Wea. Rev., 98, 307-314.
24. Giorgi, F., M. R. Marinucci, and G. T. Bates, 1993: Development of a second-generation regional climate control model (RegCM2). Part I: Boundary layer and radiative transfer processes. Mon. Wea. Rev., 121, 2794-2813.
25. Grell, C. A., J. Dudhia, and D. R. Stauffer, 1994: A description of the fifth-generation Penn State/NCAR Mesoscale Model (MM5). NCAR Tech. Note TN-398+STR, National Center for Atmospheric Research, Boulder, CO, 122 pp.
26. Holton, J. R., 1971: A diagnostic model for equatorial wave disturbances: The role of vertical shear of the mean zonal wind. J. Atmos. Sci., 28, 55-64.
27. Horel, J. D., J. B. Pechmann, A. N. Hahmann, and J. E. Gelsler, 1994: Simulations of the Amazon basin circulation with a regional model. J. Climate, 7, 56-71.
28. Kain, J. S., and J. M. Fritsch, 1993: Convective parameterization for mesoscale models: The Kain-Fritsch scheme. The Representation of Cumulus Convection in Numerical Models, Meteor. Monogr., No. 46, Amer. Meteor. Soc., 165-170.
29. Kalnay, E., and Coauthors, 1996: The NCEP/NCAR 40-Year Reanalysis Project. Bull. Amer. Meteor. Soc., 77, 437-471.
30. Kwon, H. J., 1989: A re-examination of the genesis of African waves. J. Atmos. Sci., 46, 3621-3631.
31. Liebmann, B., and H. H. Hendon, 1990: Synoptic scale disturbances near the equator. J. Atmos. Sci., 47, 1463-1479.
32. Mass, C., 1979: A linear primitive equation model of African wave disturbances. J. Atmos. Sci., 36, 2075-2092.
33. Mlawer, E. J., S. J. Taubman, P. D. Brown, M. J. Iacono, and S. A. Clough, 1997: Radiative transfer for inhomogeneous atmosphere: RRTM, a validated correlated-k model for longwave. J. Geophys. Res., 102 (D14), 16 663-16 682.
34. Molinari, J., D. Knight, M. Dickinson, D. Vollaro, and S. Skubis, 1997: Potential vorticity, easterly waves, and tropical cyclogenesis. Mon. Wea. Rev., 125, 2699-2708.
35. Nieuwolt, S., 1977: Tropical Climatology. John Wiley & Sons, 59 pp.
36. Norquist, D. C., E. E. Recker, and R. J. Reed, 1977: The energetics of African wave disturbances as observed during Phase III of GATE. Mon. Wea. Rev., 105, 334-342.
37. Reed, R. J., D. C. Nordquist, and E. E. Recker, 1977: The structure and properties of African easterly wave disturbances as observed during Phase III of GATE. Mon. Wea. Rev., 105, 317-333.
38. Reed, R. J., W. A. Hollinsworth, W. A. Heckley, and F. Delsol, 1988: An evaluation of the performance of the ECMWF operational forecasting system in analyzing and forecasting tropic easterly wave disturbances over Africa and tropical Atlantic. Mon. Wea. Rev., 116, 824-865.
39. Rennick, M. A., 1976: The generation of African easterly waves. J. Atmos. Sci., 33, 1955-1969.
40. Riehl, H., 1954: Tropical Meteorology. McGraw-Hill, 392 pp.
41. Schubert, W. H., P. E. Ciesielski, D. E. Stevens, and H. C. Kuo, 1991: Potential vorticity modeling of the ITCZ and the Hadley circulation. J. Atmos. Sci., 48, 1493-1509
42. Shea, D. J., K. E. Trenberth, and R. W. Reynolds, 1992: A global monthly sea surface temperature climatology. J. Climate, 5, 987-1001.
43. Simmons, A. J., 1977: A note on the instability of the African easterly jet. J. Atmos. Sci., 34, 1670-1674.
44. Taylor, C. M., R. J. Ellis, D. J. Parker, R. R. Burton, and C. D. Thorncroft, 2003: Linking boundary-layer variability with convection: A case-study from JET2000. Quart. J. Roy. Meteor. Soc., 129, 2233-2253.
45. Thorncroft, C. D., 1995: An idealized study of African easterly waves, Part I: More realistic basic states. Quart. J. Roy. Meteor. Soc., 121, 1589-1614.
46. Thorncroft, C. D., and M. Blackburn, 1999: Maintenance of the African easterly jet. Quart. J. Roy. Meteor. Soc., 125, 763-786.
47. Thorncroft, C. D., and B. J. Hoskins, 1994a: An idealized study of African easterly waves. Part I: A linear view. Quart. J. Roy. Meteor. Soc., 120, 953-982.
48. Thorncroft, C. D., and B. J., Hoskins, 1994b: An idealized study of African easterly waves. Part II: A nonlinear view. Quart J. Roy. Meteor. Soc., 120, 983-1015.
49. Thorncroft, C. D., and K. Hodges, 2001: African easterly wave variability and its relationship to Atlantic tropical cyclone activity. J. Climate, 14, 1166-1179.
50. Viltard, A., P. deFelice, and J. Oubuih, 1997: Comparison of the African and the 6-9 day wave-like disturbance patterns over West Africa and the tropical Atlantic during summer 1985. Meteor. Atmos. Phys., 62, 91-99.
51. Vizy, E. K., and K. H. Cook, 2002: Development and application of a mesoscale climate model for the Tropics: Influence of sea surface temperature anomalies on the West African monsoon. J. Geophys. Res., 107,, 4023, doi:10.1029/2001JD000686.
52. Vizy, E. K., and K. H. Cook, 2003: Connection between the summer east African and Indian rainfall regimes. J. Geophys. Res., 108, 4510, doi:10.1029/2003JD003452.
53. Willmott, C. J., C. M. Rowe, and Y. Mintz, 1985: Climatology of the terrestrial seasonal water cycle. J. Climatol., 5, 589-606.
54. Zhang, D.-L., and R. A. Anthes, 1982: A high resolution model of the planetary boundary layer-sensitivity tests and comparisons with SESAME-79 data. J. Appl. Meteor., 21, 1594-1609.