Horizontal and vertical structure of easterly waves in the Pacific ITCZ

Journal of the Atmospheric Sciences

Volumn 65, Issue 4, 2008, Pages 1266-1284

  Serra, Yolande L ^a   Kiladis, George N ^b   Cronin, Meghan F ^b  

^a UNIVERSITY OF ARIZONA   (United States)

^b NOAA EARTH SYSTEM RESEARCH LABORATORY   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

FILTRATION; METEOROLOGICAL INSTRUMENTS;

ATLANTIC; BOREAL SUMMER; EASTERLY WAVE; INDEPENDENT VARIABLES; INTER TROPICAL CONVERGENCE ZONE (ITCZ); OPEN OCEAN BUOYS; OUTGOING LONGWAVE RADIATION (OLR); PHASE SPEEDS; RE ANALYSIS; SPECTRAL FILTERING; TIME SCALING; VERTICAL STRUCTURES; WIND FIELDS;

WAVES;

AIR TEMPERATURE; ATMOSPHERIC CONVECTION; BAROCLINIC INSTABILITY; BAROTROPIC INSTABILITY; CONVECTIVE SYSTEM; EASTERLY WAVE; INTERTROPICAL CONVERGENCE ZONE; LATENT HEAT FLUX; LONGWAVE RADIATION; PHASE VELOCITY; RADIATIVE FORCING; TROPOSPHERE; WAVELENGTH; WIND FIELD;

ATLANTIC OCEAN; PACIFIC OCEAN; PACIFIC OCEAN (CENTRAL); PACIFIC OCEAN (EAST);

EID: 45849141628     PISSN: 00224928     EISSN: None     Source Type: Journal    
DOI: 10.1175/2007JAS2341.1     Document Type: Article

References (68)

1. Burpee, R. W., 1972: The origin and structure of easterly waves in the lower troposphere of North Africa. J. Atmos. Sci., 29, 77-90.
2. Chang, C.-P., 1970: Westward propagating cloud patterns in the tropical Pacific as seen from time-composite satellite photographs. J. Atmos. Sci., 27, 133-138.
3. Cronin, M. F., and D. R. Watts, 1996: Eddy-mean flow interaction in the Gulf Stream at 68°W. Part I: Eddy energetics. J. Phys. Oceanogr., 26, 2107-2131.
4. Cronin, M. F., N. Bond, C. Fairall, J. Hare, M. J. McPhaden, and R. A. Weller, 2002: Enhanced oceanic and atmospheric monitoring underway in Eastern Pacific. Eos, Trans. Amer. Geophys. Union, 83, 205.
5. Cronin, M. F., N. Bond, C. W. Fairall, and R. A. Weller, 2006a: Surface cloud forcing in the East Pacific stratus deck/cold tongue/ITCZ complex. J. Climate, 19, 392-409.
6. Cronin, M. F., C. W. Fairall, and M. J. McPhaden, 2006b: An assessment of buoy-derived and numerical weather prediction surface heat fluxes in the tropical Pacific. J. Geophys. Res., 111, C06038, doi:10.1029/2005JC003324.
7. Deser, C., and C. A. Smith, 1998: Diurnal and semidiurnal variations of the surface wind field over the tropical Pacific Ocean. J. Climate, 11, 1730-1748.
8. Dickinson, M., and J. Molinari, 2002: Mixed Rossby-gravity waves and western Pacific tropical cyclogenesis. Part I: Synoptic evolution. J. Atmos. Sci., 59, 2183-2196.
9. Diedhiou, A., S. Janicot, A. Viltard, and P. de Félice, 2001: Composite patterns of easterly disturbances over West Africa and the tropical Atlantic: A climatology from the 1979-95 NCEP/NCAR reanalyses. Climate Dyn., 18, 241-253.
10. Diedhiou, A., S. Janicot, A. Viltard, and P. de Félice, 2002: Energetics of easterly wave disturbances over West Africa and the tropical Atlantic: A climatology from the 1979-95 NCEP/NCAR reanalyses. Climate. Dyn., 18, 487-500.
11. Dunkerton, T. J., and M. P. Baldwin, 1995: Observation of 3-6-day meridional wind oscillations over the tropical Pacific, 1973-1992: Horizontal structure and propagation. J. Atmos. Sci., 52, 1585-1601.
12. Dunkerton, T. J., and F. X. Crum, 1995: Eastward propagating ∼ 2- to 15-day equatorial convection and its relation to the tropical intraseasonal oscillation. J. Geophys., Res., 100, 25 781-25 790.
13. Ferreira, R. N., and W. H. Schubert, 1997: Barotropic aspects of ITCZ breakdown. J. Atmos. Sci., 54, 261-285.
14. Gu, G., and C. Zhang, 2002: Westward-propagating synoptic-scale disturbances and the ITCZ. J. Atmos. Sci., 59, 1062-1075.
15. Haertel, P. T., and G. N. Kiladis, 2004: Dynamics of 2-day equatorial waves. J. Atmos. Sci., 61, 2707-2721.
16. 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.
17. Hayashi, Y., 1970: A theory of large-scale equatorial waves generated by condensation heat and accelerating the zonal wind. J. Meteor. Soc. Japan, 48, 140-160.
18. Hodges, K. I., B. J. Hoskins, J. Boyle, and C. Thorncroft, 2003: A comparison of recent reanalysis datasets using objective feature tracking: Storm tracks and tropical easterly waves. Mon. Wea. Rev., 131, 2012-2037.
19. Holland, G. J., 1995: Scale interaction in the western Pacific monsoon. Meteor. Atmos. Phys., 56, 57-79.
20. 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.
21. Hsieh, J.-S., and K. H. Cook, 2005: Generation of African easterly wave disturbances: Relationship to the African easterly jet. Mon. Wea. Rev., 133, 1311-1327.
22. Hsieh, J.-S., and K. H. Cook, 2007: A study of the energetics of African easterly waves using a regional climate model. J. Atmos. Sci., 64, 421-440.
23. Jiang, C., M. F. Cronin, K. A. Kelly, and L. Thompson, 2005: Evaluation of a hybrid satellite- and NWP-based turbulent heat flux product using Tropical Atmosphere-Ocean (TAO) buoys. J. Geophys. Res., 110, C09007, doi:10.1029/2004JC002824.
24. Kiladis, G.N., and M. Wheeler, 1995: Horizontal and vertical structure of observed tropospheric equatorial Rossby waves. J. Geophys. Res., 100, 22 981-22 998.
25. 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.
26. Lau, K.-H., and N.-C. Lau, 1990: Observed structure and propagation characteristics of tropical summertime synoptic scale disturbances. Mon. Wea Rev., 118, 1888-1913.
27. Lau, K.-H., and N.-C. Lau, 1992: The energetics and propagation dynamics of tropical summertime synoptic-scale disturbances. Mon. Wea. Rev., 120, 2523-2539.
28. Liebmann, B., and H. H. Hendon, 1990: Synoptic-scale disturbances near the equator. J. Atmos. Sci., 47, 1463-1479.
29. Lorenz, E. N., 1955: Available potential energy and the maintenance of the general circulation. Tellus, 7, 157-167.
30. Madden, R. A., and P. R. Julian, 1994: Observations of the 40-50-day tropical oscillation - A review. Mon. Wea. Rev., 122, 814-837.
31. Maloney, E. D., and D. L. Hartmann, 2000: Modulation of eastern North Pacific hurricanes by the Madden-Julian oscillation. J. Climate, 13, 1451-1460.
32. Maloney, E. D., and D. L. Hartmann, 2001: The Madden-Julian oscillation, barotropic dynamics, and North Pacific tropical cyclone formation. Part I: Observations. J. Atmos. Sci., 58, 2545-2558.
33. McPhaden, M. J., and Coauthors, 1998: The Tropical Ocean-Global Atmosphere observing system: A decade of progress. J. Geophys. Res., 103, 14 169-14 240.
34. Mitchell, T. P., and J. M. Wallace, 1992: The annual cycle in equatorial convection and sea surface temperature. J. Climate, 5, 1140-1156.
35. Molinari, J., and D. Vollaro, 2000: Planetary- and synoptic-scale influences on eastern Pacific tropical cyclogenesis. Mon. Wea. Rev., 128, 3296-3307.
36. Molinari, J., D. Knight, M. Dickinson, D. Vollaro, and S. Skubis, 1997: Potential vorticity, easterly waves, and eastern Pacific tropical cyclogenesis. Mon. Wea. Rev., 125, 2699-2708.
37. Molinari, J., D. Vollaro, S. Skubis, and M. Dickinson, 2000: Origins and mechanisms of eastern Pacific tropical cyclogenesis: A case study. Mon. Wea. Rev., 128, 125-139.
38. Mounier, F., G. N. Kiladis, and S. Janicot, 2007: Analysis of the dominant mode of convectively coupled Kelvin waves in the West African monsoon. J. Climate, 20, 1487-1503.
39. Nitta, T., Y. Nakagomi, A. Kadokura, Y. Suzuki, and N. Hasegawa, 1985: Global analysis of the lower tropospheric disturbances in the tropics during the northern summer of the FGGE year. Part I: Global features of the disturbances. J. Meteor. Soc. Japan, 63, 1-19.
40. 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.
41. Petersen, W. A., R. Cifelli, D. J. Boccippio, S. A. Rutledge, and C. Fairall, 2003: Convection and easterly wave structures observed in the eastern Pacific warm pool during EPIC-2001. J. Atmos. Sci., 60, 1754-1773.
42. Plumb, R. A., 1983: A new look at the energy cycle. J. Atmos. Sci., 40, 1669-1688.
43. Reed, R. J., and E. E. Recker, 1971: Structure and properties of synoptic-scale wave disturbances in the equatorial western Pacific. J. Atmos. Sci., 28, 1117-1133.
44. 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.
45. Reed, R. J., E. Klinker, and A. Hollingsworth, 1988: The structure and characteristics of African easterly wave disturbances as determined from the ECMWF operational analysis/forecast system. Meteor. Atmos. Phys., 38, 22-33.
46. Roundy, P. E., and W. M. Frank, 2004: A climatology of waves in the equatorial region. J. Atmos. Sci., 61, 2105-2132.
47. Serra, Y. L., and R. A. Houze Jr., 2002: Observations of variability on synoptic timescales in the east Pacific ITCZ. J. Atmos. Sci., 59, 1723-1743.
48. Serra, Y. L., M. F. Cronin, and G. N. Kiladis, 2007: Sub-seasonal variance of surface meteorological parameters in buoy observations and reanalyses. Geophys. Res. Lett., 34, L12708, doi:10.1029/ 2007GL029506.
49. Sobel, A. H., and C. S. Bretherton, 1999: Development of synoptic-scale disturbances over the summertime tropical northwest Pacific. J. Atmos. Sci., 56, 3106-3127.
50. Straub, K. H., and G. N. Kiladis, 2002: Observations of a convectively coupled Kelvin wave in the eastern Pacific ITCZ. J. Atmos. Sci., 59, 30-53.
51. Straub, K. H., and G. N, Kiladis, 2003: Interactions between the boreal summer intraseasonal oscillation and higher-frequency tropical wave activity. Mon Wea. Rev. 131, 945-960.
52. Tai, K.-S., and Y. Ogura, 1987: An observational study of easterly waves over the eastern Pacific in the northern summer using FGGE data. J. Atmos. Sci., 44, 339-361.
53. Takayabu, Y. N., and M. Murakami, 1991: The structure of super cloud clusters observed in 1-20 June 1986 and their relationship to easterly weves. J. Meteor. Soc. Japan, 69, 105-125.
54. Takayabu, Y. N., and T. Nitta 1993: 3-5 day-period disturbances coupled with convection over the tropical Pacific Ocean. J. Meteor. Soc. Japan, 71, 221-246.
55. Takayabu, Y. N., K.-M. Lau, and C.-H. Sui, 1996: Observation of a quasi-2-day wave during TOGA COARE. Mon. Wea. Rev., 124, 1892-1913.
56. Tam, C.-Y., and T. Li, 2006. The origin and dispersion characteristics of the observed tropical summertime synoptic-scale waves over the western Pacific. Mon. Wea. Rev., 134, 1630-1646.
57. Thompson, R. M., Jr., S. W. Payne, E. E. Recker, and R. J. Reed, 1979: Structure and properties of synoptic-scale wave disturbances in the intertropical convergence zone of the eastern Atlantic. J. Atmos. Sci., 36, 53-72.
58. Thorncroft, C. D., and B. J. Hoskins, 1994a: An idealized study of African easterly waves. I: A linear view. Quart. J. Roy. Meteor. Soc., 120 953-982.
59. Thorncroft, C. D., and B. J. Hoskins, 1994b: An idealized study of African easterly waves. II: A nonlinear view. Quart. J. Roy. Meteor. Soc., 120, 983-1015.
60. Wang, C.-C., and G. Magnusdottir, 2005: ITCZ breakdown in three-dimensional flows. J. Atmos. Sci., 62, 1497-1512.
61. Webster, P. J., and H.-R. Chang, 1988: Equatorial energy accumulation and emanation regions: Impacts of a zonally varying basic state. J. Atmos. Sci., 45, 803-829.
62. Wheeler, M., and G. N. Kiladis, 1999: Convectively coupled equatorial waves: Analysis of clouds and temperature in the wave-number frequency domain. J. Atmos. Sci., 56, 374-399.
63. Wheeler, M., G. N. Kiladis, and P. J. Webster, 2000: Large-scale dynamical fields associated with convectively coupled equatorial waves. J. Atmos. Sci., 57, 613-640.
64. Yanai, M., T. Maruyama, T. Nitta, and Y. Hayashi, 1968: Power spectra of large-scale disturbances over the tropical Pacific. J. Meteor. Soc. Japan, 46, 308-323.
65. Zehnder, J. A., 1991: The interaction of planetary-scale tropical easterly waves with topography: A mechanism for the initiation of tropical cyclone. J. Atmos. Sci., 48, 1217-1230.
66. Zehnder, J. A., D. M. Powell, and D. L. Ropp, 1999: The interaction of easterly waves, orography, and the intertropical convergence zone in the genesis of eastern Pacific tropical cyclones. Mon. Wea. Rev., 127, 1556-1585.
67. Zhang, C., 2005: Madden-Jalian Oscillation. Rev. Geophys., 43, RG2003, doi:l0.1029/2004RG000158.
68. Zipser, E. J., 1977: Mesoscale and convective-scale downdrafts as distinct components of squall-line structure. Mon. Wea. Rev., 105, 1568-1589.