Editorial Type:
Article
Article Type:
Research Article

The Impact of Antarctic Cloud Radiative Properties on a GCM Climate Simulation

Dan Lubin California Space Institute, Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California

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Biao Chen Polar Meteorology Group, Byrd Polar Research Center, Ohio State University, Columbus, Ohio

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David H. Bromwich Polar Meteorology Group, Byrd Polar Research Center, Ohio State University, Columbus, Ohio; Atmospheric Sciences Program, Ohio State University, Columbus, Ohio

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Richard C. J. Somerville Climate Research Division, Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California

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Wan-Ho Lee Climate Research Division, Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California

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Keith M. Hines Polar Meteorology Group, Byrd Polar Research Center, Ohio State University, Columbus, Ohio

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Print Publication:
01 Mar 1998
DOI:
https://doi.org/10.1175/1520-0442(1998)011<0447:TIOACR>2.0.CO;2
Page(s):
447–462
Restricted access

Abstract

A sensitivity study to evaluate the impact upon regional and hemispheric climate caused by changing the optical properties of clouds over the Antarctic continent is conducted with the NCAR Community Model version 2 (CCM2). Sensitivity runs are performed in which radiation interacts with ice clouds with particle sizes of 10 and 40 μm rather than with the standard 10-μm water clouds. The experiments are carried out for perpetual January conditions with the diurnal cycle considered. The effects of these cloud changes on the Antarctic radiation budget are examined by considering cloud forcing at the top of the atmosphere and net radiation at the surface. Changes of the cloud radiative properties to those of 10-μm ice clouds over Antarctica have significant impacts on regional climate: temperature increases throughout the Antarctic troposphere by 1°–2°C and total cloud fraction over Antarctica is smaller than that of the control at low levels but is larger than that of the control in the mid- to upper troposphere. As a result of Antarctic warming and changes in the north–south temperature gradient, the drainage flows at the surface as well as the meridional mass circulation are weakened. Similarly, the circumpolar trough weakens significantly by 4–8 hPa and moves northward by about 4°–5° latitude. This regional mass field adjustment halves the strength of the simulated surface westerly winds. As a result of indirect thermodynamic and dynamic effects, significant changes are observed in the zonal mean circulation and eddies in the middle latitudes. In fact, the simulated impacts of the Antarctic cloud radiative alteration are not confined to the Southern Hemisphere. The meridional mean mass flux, zonal wind, and latent heat release exhibit statistically significant changes in the Tropics and even extratropics of the Northern Hemisphere. The simulation with radiative properties of 40-μm ice clouds produces colder surface temperatures over Antarctica by up to 3°C compared to the control. Otherwise, the results of the 40-μm ice cloud simulation are similar to those of the 10-μm ice cloud simulation.

** Current affiliation: Systems Engineering Research Institute, Taejon, Korea.

Corresponding author address: Dr. David H. Bromwich, Byrd Polar Research Center, Ohio State University, 1090 Carmack Road, 108 Scott Hall, Columbus, OH 43210-1002.

Email: bromwich@polarmet1.mps.ohio-state.edu

Abstract

A sensitivity study to evaluate the impact upon regional and hemispheric climate caused by changing the optical properties of clouds over the Antarctic continent is conducted with the NCAR Community Model version 2 (CCM2). Sensitivity runs are performed in which radiation interacts with ice clouds with particle sizes of 10 and 40 μm rather than with the standard 10-μm water clouds. The experiments are carried out for perpetual January conditions with the diurnal cycle considered. The effects of these cloud changes on the Antarctic radiation budget are examined by considering cloud forcing at the top of the atmosphere and net radiation at the surface. Changes of the cloud radiative properties to those of 10-μm ice clouds over Antarctica have significant impacts on regional climate: temperature increases throughout the Antarctic troposphere by 1°–2°C and total cloud fraction over Antarctica is smaller than that of the control at low levels but is larger than that of the control in the mid- to upper troposphere. As a result of Antarctic warming and changes in the north–south temperature gradient, the drainage flows at the surface as well as the meridional mass circulation are weakened. Similarly, the circumpolar trough weakens significantly by 4–8 hPa and moves northward by about 4°–5° latitude. This regional mass field adjustment halves the strength of the simulated surface westerly winds. As a result of indirect thermodynamic and dynamic effects, significant changes are observed in the zonal mean circulation and eddies in the middle latitudes. In fact, the simulated impacts of the Antarctic cloud radiative alteration are not confined to the Southern Hemisphere. The meridional mean mass flux, zonal wind, and latent heat release exhibit statistically significant changes in the Tropics and even extratropics of the Northern Hemisphere. The simulation with radiative properties of 40-μm ice clouds produces colder surface temperatures over Antarctica by up to 3°C compared to the control. Otherwise, the results of the 40-μm ice cloud simulation are similar to those of the 10-μm ice cloud simulation.

** Current affiliation: Systems Engineering Research Institute, Taejon, Korea.

Corresponding author address: Dr. David H. Bromwich, Byrd Polar Research Center, Ohio State University, 1090 Carmack Road, 108 Scott Hall, Columbus, OH 43210-1002.

Email: bromwich@polarmet1.mps.ohio-state.edu

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  • Bromwich, D. H., and B. Chen, 1996: Global atmospheric impacts induced by sea ice anomalies around Antarctica. Preprints, Conf. on the Global Ocean–Atmosphere–Land System (GOALS), Atlanta, GA, Amer. Meteor. Soc., 218–222.

  • ——, R.-Y. Tzeng, and T. R. Parish, 1994: Simulation of the modern Arctic climate by the NCAR CCM1. J. Climate,7, 1050–1069.

  • Cess, R. D., and Coauthors, 1995: Absorption of solar radiation by clouds: Observations versus models. Science,267, 496–499.

  • Chen, B., D. H. Bromwich, K. M. Hines, and X. Pan, 1995: Simulations of the 1979–88 polar climates by global climate models. Ann. Glaciol.,21, 83–90.

  • Ebert, E. E., and J. A. Curry, 1992: A parameterization of ice cloud optical properties for climate models. J. Geophys. Res.,97, 3831–3836.

  • 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 Tech. Note NCAR/TN-382+STR, Boulder, CO, 108 pp.

  • Han, Q., W. B. Rossow, and A. A. Lacis, 1994: Near-global survey of effective droplet radius in water clouds using ISCCP data. J. Climate,7, 465–497.

  • Hanel, R. A., B. J. Conrath, V. G. Kunde, C. Prabhakara, I. Revah, V. V. Salomonson, and G. Wolford, 1972: The Nimbus 4 infrared spectroscopy experiment, I: Calibrated thermal emission spectra. J. Geophys. Res.,77, 2629–2641.

  • Keller, L. M., G. A. Weidner, C. R. Stearns, and M. F. Sievers, 1989:Antarctic automatic weather station data for the calendar year 1988. Department of Meteorology, University of Wisconsin—Madison, Madison, WI, 329 pp. [Available from Dept. of Atmospheric and Oceanic Sciences, University of Wisconsin—Madison, 1225 W. Dayton St., Madison, WI 53706.].

  • Kiehl, J. T., 1994: Sensitivity of a GCM climate simulation to differences in continental versus maritime cloud drop size. J. Geophys. Res.,99, 23107–23115.

  • ——, J. J. Hack, M. H. Zhang, and R. D. Cess, 1995: Sensitivity of a GCM climate to enhanced shortwave cloud absorption. J. Climate,8, 2200–2212.

  • ——, B. A. Boville, B. P. Briegleb, J. J. Hack, P. J. Rasch, and D. L. Williamson, 1996: Description of the NCAR Community Climate Model (CCM3). NCAR Tech. Note NCAR/TN-420+STR, Boulder, CO, 152 pp.

  • Knollenberg, R. G., K. Kelly, and J. C. Wilson, 1993: Measurements of high number densities of ice crystals in the tops of tropical cumulonimbus. J. Geophys. Res.,98, 8639–8664.

  • Lee, W.-H., and R. C. J. Somerville, 1996: Effects of alternative cloud radiation parameterizations in a general circulation model. Ann. Geophys.,14, 107–114.

  • Lubin, D., 1994: Infrared radiative properties of the maritime Antarctic atmosphere. J. Climate,7, 121–140.

  • ——, and D. A. Harper, 1996: Cloud radiative properties over the South Pole from AVHRR infrared data. J. Climate,9, 3405–3418.

  • ——, J.-P. Chen, P. Pilewskie, V. Ramanathan, and F. P. J. Valero, 1996: Microphysical examination of excess cloud absorption in the tropical atmosphere. J. Geophys. Res.,101, 16961–16972.

  • Morely, B. M., E. E. Uthe, and W. Viezee, 1989: Airborne lidar observations of clouds in the Antarctic troposphere. Geophys. Res. Lett.,16, 491–494.

  • Nemesure, S., R. D. Cess, E. G. Dutton, J. J. DeLuisi, Z. Li, and H. G. Leighton, 1994: Impact of clouds on the shortwave radiation budget of the surface–atmosphere system for snow-covered surfaces. J. Climate,7, 579–585.

  • Ramanathan, V., E. J. Pitcher, R. C. Malone, and M. L. Blackmon, 1983: The response of a general circulation model to refinements in radiative processes. J. Atmos. Sci.,40, 605–630.

  • ——, B. Subasilar, G. Zhang, W. Conant, R. D. Cess, J. Kiehl, H. Grassl, and L. Shi, 1995: Warm pool heat budget and shortwave cloud forcing: A missing physics? Science,267, 499–503.

  • Rind, D., 1987: Components of the ice age circulation. J. Geophys. Res.,92, 4241–4281.

  • Saxena, V. K., and F. H. Ruggiero, 1990: Antarctic coastal stratus clouds: Microstructure and acidity. Contributions to Antarctic Research I, Antarct. Res. Series, Vol. 50, Amer. Geophys. Union, 7–18.

  • Shibata, K., and M. Chiba, 1990: Effects of radiation scheme on the surface and wind regime over the Antarctic and on circumpolar lows. NIPR Symp. Polar Meteor. Glaciol.,3, 58–78.

  • Simmonds, I., and W. F. Budd, 1991: Sensitivity of the southern hemisphere circulation to leads in the Antarctic pack ice. Quart. J. Roy. Meteor. Soc.,117, 1003–1024.

  • Slingo, A., 1989: GCM parameterization for the shortwave radiative properties of water clouds. J. Atmos. Sci.,46, 1419–1427.

  • ——, and J. M. Slingo, 1991: Response of the National Center for Atmospheric Research Community Climate Model to improvements in the representation of clouds. J. Geophys. Res.,96, 15341–15357.

  • Stone, R. S., 1993: Properties of austral winter clouds derived from radiometric profiles at the South Pole. J. Geophys. Res.,98, 12961–12971.

  • Tomas, R. A., and P. J. Webster, 1994: Horizontal and vertical structure of cross-equatorial wave propagation. J. Atmos. Sci.,51, 1417–1430.

  • Tzeng, R.-Y., D. H. Bromwich, T. R. Parish, and B. Chen, 1994: NCAR CCM2 simulation of the modern Antarctic climate. J. Geophys. Res.,99, 23131–23148.

  • Walden, V. P., 1995: The downward longwave radiation spectrum over the Antarctic Plateau. Ph.D. thesis, University of Washington, 267 pp. [Available from UMI Dissertation Abstracts International, 300 N. Zeeb Road, Ann Arbor, Michigan 48106; UMI AA19616686.].

  • Webster, P. J., 1983: Large scale structures of the tropical atmosphere. Large-Scale Dynamical Processes in the Atmosphere, B. J. Hoskins and R. P. Pearce, Eds., Academic Press, 127–168.

  • ——, and J. R. Holton, 1982: Cross equatorial response to middle-latitude forcing in a zonally varying basic state. J. Atmos. Sci.,39, 722–733.

  • Wu, G., and C. Brankovic, 1985: General circulation diagnostics package. ECMWF Res. Dept. Tech. Memo. 96, ECMWF, Reading, United Kingdom, 35 pp.

  • Yamanouchi, T., and T. P. Charlock, 1995: Comparison of radiation budget at the TOA and surface in the Antarctic from ERBE and ground surface measurements. J. Climate,8, 3109–3120.

  • Zav’yalova, I. N., 1986: Humidity of air in Antarctica. Climate of Antarctica, I. M. Dolgin, Ed., Oxonian Press, 92–101.

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