Editorial Type:
Article
Article Type:
Research Article

The Hadley Circulation as a Radiative–Convective Instability

David J. Raymond Physics Department and Geophysical Research Center, New Mexico Institute of Mining and Technology, Socorro, New Mexico

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Print Publication:
01 May 2000
DOI:
https://doi.org/10.1175/1520-0469(2000)057<1286:THCAAR>2.0.CO;2
Page(s):
1286–1297
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Abstract

Hadley cell simulations over a tropical ocean are reported that suggest that the emission and absorption of thermal radiation by clouds plays an important role in the dynamics of the Hadley circulation. In particular, inclusion of interactions between clouds and radiation causes the tropical atmosphere to become unstable to large-scale convective circulations driven by differential radiative heating between cloudy and clear regions, even when the sea surface temperature and the solar forcing do not vary with latitude or time. Zonally symmetric circulations take the form of an equatorially asymmetric convective cell, with ascent in one hemisphere and descent in the other. This may explain why there is usually only one intertropical convergence zone that is located away from the equator even when the sea surface temperature maximum is on or near the equator.

The conclusions of this paper are tentative because the treatments of convection, radiation, and cloudiness are highly simplified. However, if the simulated radiative–convective instability exists in nature, it also may explain the tendency of the tropical atmosphere to divide into large areas that are convectively suppressed, punctuated by smaller areas of intense convection.

Corresponding author address: Dr. David J. Raymond, Physics Department, New Mexico Institute of Mining and Technology, 801 Leroy Place, Socorro, NM 87801-4796.

Email: raymond@kestrel.nmt.edu

Abstract

Hadley cell simulations over a tropical ocean are reported that suggest that the emission and absorption of thermal radiation by clouds plays an important role in the dynamics of the Hadley circulation. In particular, inclusion of interactions between clouds and radiation causes the tropical atmosphere to become unstable to large-scale convective circulations driven by differential radiative heating between cloudy and clear regions, even when the sea surface temperature and the solar forcing do not vary with latitude or time. Zonally symmetric circulations take the form of an equatorially asymmetric convective cell, with ascent in one hemisphere and descent in the other. This may explain why there is usually only one intertropical convergence zone that is located away from the equator even when the sea surface temperature maximum is on or near the equator.

The conclusions of this paper are tentative because the treatments of convection, radiation, and cloudiness are highly simplified. However, if the simulated radiative–convective instability exists in nature, it also may explain the tendency of the tropical atmosphere to divide into large areas that are convectively suppressed, punctuated by smaller areas of intense convection.

Corresponding author address: Dr. David J. Raymond, Physics Department, New Mexico Institute of Mining and Technology, 801 Leroy Place, Socorro, NM 87801-4796.

Email: raymond@kestrel.nmt.edu

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  • Albrecht, B., and S. K. Cox, 1975: The large-scale response of the tropical atmosphere to cloud modulated infrared heating. J. Atmos. Sci.,32, 16–24.

  • Anthes, R. A., and D. R. Johnson, 1968: The generation of available potential energy in Hurricane Hilda (1964). Mon. Wea. Rev.,96, 291–302.

  • Bretherton, C. S., and P. K. Smolarkiewicz, 1989: Gravity waves, compensating subsidence and detrainment around cumulus clouds. J. Atmos. Sci.,46, 740–759.

  • Briegleb, B. P., 1992a: Delta-Eddington approximation for solar radiation in the NCAR community climate model. J. Geophys. Res.,97, 7603–7612.

  • ——, 1992b: Longwave band model for thermal radiation in climate studies. J. Geophys. Res.,97, 11 475–11 485.

  • Charney, J., 1971: Tropical cyclogenesis and the formation of the intertropical convergence zone. Lectures in Applied Mathematics, Vol. 13, American Mathematical Society, 355–368.

  • ——, and A. Eliassen, 1964: On the growth of the hurricane depression. J. Atmos. Sci.,21, 68–75.

  • Chen, S., and W. R. Cotton, 1988: The sensitivity of a simulated extratropical mesoscale convective system to longwave radiation and ice-phase microphysics. J. Atmos. Sci.,45, 3897–3910.

  • Cohen, C., and W. M. Frank, 1987: Simulation of tropical convective systems. Part II: Simulations of moving cloud lines. J. Atmos. Sci.,44, 3800–3820.

  • Cox, S. K., and K. T. Griffith, 1979a: Estimates of radiative divergence during Phase III of the GARP Atlantic Tropical Experiment: Part I. Methodology. J. Atmos. Sci.,36, 576–585.

  • ——, and ——, 1979b: Estimates of radiative divergence during Phase III of the GARP Atlantic Tropical Experiment: Part II. Analysis of Phase III results. J. Atmos. Sci.,36, 586–601.

  • Craig, G. C., 1995: Radiation and polar lows. Quart. J. Roy. Meteor. Soc.,121, 79–94.

  • ——, 1996: Numerical experiments on radiation and tropical cyclones. Quart. J. Roy. Meteor. Soc.,122, 415–422.

  • Dudhia, J., 1989: Numerical study of convection observed during the Winter Monsoon Experiment using a mesoscale two-dimensional model. J. Atmos. Sci.,46, 3077–3107.

  • Emanuel, K. A., 1986: An air–sea interaction theory for tropical cyclones. Part I: Steady-state maintenance. J. Atmos. Sci.,43, 585–604.

  • ——, 1987: An air–sea interaction model of intraseasonal oscillations in the Tropics. J. Atmos. Sci.,44, 2324–2340.

  • ——, 1988: The maximum intensity of hurricanes. J. Atmos. Sci.,45, 1143–1155.

  • ——, 1989: The finite-amplitude nature of tropical cyclogenesis. J. Atmos. Sci.,46, 3431–3456.

  • ——, 1991: A scheme for representing cumulus convection in large-scale models. J. Atmos. Sci.,48, 2313–2335.

  • ——, 1995: The behavior of a simple hurricane model using a convective scheme based on subcloud-layer entropy equilibrium. J. Atmos. Sci.,52, 3960–3968.

  • ——, J. D. Neelin, and C. S. Bretherton, 1994: On large-scale circulations in convecting atmospheres. Quart. J. Roy. Meteor. Soc.,120, 1111–1143.

  • Goswami, B. N., J. Shukla, E. K. Schneider, and Y. C. Sud, 1984: Study of the dynamics of the intertropical convergence zone with a symmetric version of the GLAS climate model. J. Atmos. Sci.,41, 5–19.

  • Gray, W. M., 1973: Cumulus convection and larger scale circulations. Part I: Broadscale and mesoscale considerations. Mon. Wea. Rev.,101, 839–855.

  • Hack, J. J., B. A. Boville, B. P. Briegleb, J. T. Kiehl, P. J. Rasch, and D. L. Williamson, 1993: Description of the NCAR community climate model (CCM2). NCAR/TN-382+STR, 108 pp.

  • Held, I. M., and A. Y. Hou, 1980: Nonlinear axially symmetric circulations in a nearly inviscid atmosphere. J. Atmos. Sci.,37, 515–533.

  • Hess, P. G., D. S. Battisti, and P. J. Rasch, 1993: Maintenance of the intertropical convergence zones and the large-scale circulation on a water-covered earth. J. Atmos. Sci.,50, 691–713.

  • Holton, J. R., J. M. Wallace, and J. A. Young, 1971: On boundary layer dynamics and the ITCZ. J. Atmos. Sci.,28, 275–280.

  • Kuo, H. L., 1965: On the formation and intensification of tropical cyclones through latent heat release by cumulus convection. J. Atmos. Sci.,22, 40–63.

  • ——, 1974: Further studies of the parameterization of the influence of cumulus convection on large-scale flow. J. Atmos. Sci.,31, 1232–1240.

  • Kurihara, Y., and R. E. Tuleya, 1981: A numerical simulation study on the genesis of a tropical storm. Mon. Wea. Rev.,109, 1629–1653.

  • Lin, X., and R. H. Johnson, 1996: Heating, moistening, and rainfall over the western Pacific warm pool during TOGA COARE. J. Atmos. Sci.,53, 3367–3383.

  • Manabe, S., D. G. Hahn, and J. L. Holloway Jr., 1974: The seasonal variation of the tropical circulation as simulated by a global model of the atmosphere. J. Atmos. Sci.,31, 43–83.

  • Mapes, B. E., and P. Zuidema, 1996: Radiative-dynamical consequences of dry tongues in the tropical troposphere. J. Atmos. Sci.,53, 620–638.

  • Miller, R. A., and W. M. Frank, 1993: Radiative forcing of simulated tropical cloud clusters. Mon. Wea. Rev.,121, 482–498.

  • Neelin, J. D., I. M. Held, and K. H. Cook, 1987: Evaporation–wind feedback and low-frequency variability in the tropical atmosphere. J. Atmos. Sci.,44, 2341–2348.

  • Nilsson, J., and K. A. Emanuel, 1999: Equilibrium atmospheres of a two-column radiative convective model. Quart. J. Roy. Meteor. Soc.,125, 2239–2264.

  • Numaguti, A., 1993: Dynamics and energy balance of the Hadley circulation and the tropical precipitation zones: Significance of the distribution of evaporation. J. Atmos. Sci.,50, 1874–1887.

  • Parsons, D. J., K. Yoneyama, and J.-L. Redelsperger, 2000: The evolution of the atmosphere–ocean system over the tropical western Pacific following the arrival of a dry intrusion. Quart. J. Roy. Meteor. Soc., in press.

  • Peixoto, J. P., and A. H. Oort, 1992: Physics of Climate. American Institute of Physics, 520 pp.

  • Pike, A. C., 1971: Intertropical convergence zone studied with an interacting atmosphere and ocean model. Mon. Wea. Rev.,99, 469–477.

  • Plumb, A. R., and A. Y. Hou, 1992: The response of a zonally symmetric atmosphere to subtropical thermal forcing: Threshold behavior. J. Atmos. Sci.,49, 1790–1799.

  • Randall, D. A., Harshvardhan, D. A. Dazlich, and T. G. Corsetti, 1989: Interactions among radiation, convection, and large-scale dynamics in a general circulation model. J. Atmos. Sci.,46, 1943–1970.

  • Raymond, D. J., 1994: Cumulus convection and the Madden–Julian oscillation of the tropical troposphere. Physica,77D, 1–22.

  • ——, 1995: Regulation of moist convection over the west Pacific warm pool. J. Atmos. Sci.,52, 3945–3959.

  • ——, 1997: Boundary layer quasi-equilibrium (BLQ). The Physics and Parameterization of Moist Atmospheric Convection, R. K. Smith, Ed., Kluwer Academic, 387–397.

  • ——, and K. A. Emanuel, 1993: The Kuo cumulus parameterization. The Representation of Cumulus Convection in Numerical Models, Meteor. Monogr., No. 46, Amer. Meteor. Soc., 145–147.

  • ——, and D. J. Torres, 1998: Fundamental moist modes of the equatorial troposphere. J. Atmos. Sci.,55, 1771–1790.

  • Sherwood, S. C., V. Ramanathan, T. P. Barnett, M. K. Tyree, and E. Roeckner, 1994: Response of an atmospheric general circulation model to radiative forcing of tropical clouds. J. Geophys. Res.,99, 20 829–20 845.

  • Slingo, A., and J. M. Slingo, 1988: The response of a general circulation model to cloud longwave radiative forcing. I: Introduction and initial experiments. Quart. J. Roy. Meteor. Soc.,114, 1027–1062.

  • Slingo, J. M., and A. Slingo, 1991: The response of a general circulation model to cloud longwave radiative forcing. II: Further studies. Quart. J. Roy. Meteor. Soc.,117, 333–364.

  • Sun, D.-Z., and Z. Liu, 1996: Dynamic ocean–atmosphere coupling:A thermostat for the tropics. Science,272, 1148–1150.

  • Sundqvist, H., 1970: Numerical simulation of the development of tropical cyclones with a ten-level model. Part II. Tellus,22, 504–510.

  • Tomas, R. A., and P. J. Webster, 1997: The role of inertial instability in determining the location and strength of near-equatorial convection. Quart. J. Roy. Meteor. Soc.,123, 1445–1482.

  • ——, J. R. Holton, and P. J. Webster, 1999: The influence of cross-equatorial pressure gradients on the location of near-equatorial convection. Quart. J. Roy. Meteor. Soc.,125, 1107–1127.

  • Waliser, D. E., and R. C. J. Somerville, 1994: Preferred latitudes of the intertropical convergence zone. J. Atmos. Sci.,51, 1619–1639.

  • Xie, S.-P., A. Kubokawa, and K. Hanawa, 1993a: Evaporation-wind feedback and the organizing of tropical convection on the planetary scale. Part I: Quasi-linear instability. J. Atmos. Sci.,50, 3873–3883.

  • ——, ——, and ——, 1993b: Evaporation-wind feedback and the organizing of tropical convection on the planetary scale. Part II:Nonlinear evolution. J. Atmos. Sci.,50, 3884–3893.

  • Yano, J.-I., and K. Emanuel, 1991: An improved model of the equatorial troposphere and its coupling with the stratosphere. J. Atmos. Sci.,48, 377–389.

  • Zhang, C., and M.-D. Chou, 1999: Variability of water vapor, infrared radiative cooling, and atmospheric instability for deep convection in the equatorial western Pacific. J. Atmos. Sci.,56, 711–723.

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