Antarctic Low-Tropospheric Humidity Inversions: 10-Yr Climatology

Tiina Nygård Finnish Meteorological Institute, and University of Helsinki, Helsinki, Finland

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Teresa Valkonen Finnish Meteorological Institute, and University of Helsinki, Helsinki, Finland

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Timo Vihma Finnish Meteorological Institute, Helsinki, Finland

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Abstract

Humidity inversions are nearly permanently present in the coastal Antarctic atmosphere. This is shown based on an investigation of statistical characteristics of humidity inversions at 11 Antarctic coastal stations using radiosonde data from the Integrated Global Radiosonde Archive (IGRA) from 2000 to 2009. The humidity inversion occurrence was highest in winter and spring, and high atmospheric pressure and cloud-free conditions generally increased the occurrence. A typical humidity inversion was less than 200 m deep and 0.2 g kg−1 strong, and a typical humidity profile contained several separate inversion layers. The inversion base height had notable seasonal variations, but generally the humidity inversions were located at higher altitudes than temperature inversions. Roughly half of the humidity inversions were associated with temperature inversions, especially near the surface, and humidity and temperature inversion strengths as well as depths correlated at several stations. On the other hand, approximately 60% of the humidity inversions were accompanied by horizontal advection of water vapor increasing with height, which is also a probable factor supporting humidity inversions. The spatial variability of humidity inversions was linked to the topography and the water vapor content of the air. Compared to previous results for the Arctic, the most striking differences in humidity inversions in the Antarctic were a much higher frequency of occurrence in summer, at least under clear skies, and a reverse seasonal cycle of the inversion height. The results can be used as a baseline for validation of weather prediction and climate models and for studies addressing changes in atmospheric moisture budget in the Antarctic.

Corresponding author address: Tiina Nygård, Finnish Meteorological Institute, P.O. Box 503, FI-00101 Helsinki, Finland. E-mail: tiina.nygard@fmi.fi

Abstract

Humidity inversions are nearly permanently present in the coastal Antarctic atmosphere. This is shown based on an investigation of statistical characteristics of humidity inversions at 11 Antarctic coastal stations using radiosonde data from the Integrated Global Radiosonde Archive (IGRA) from 2000 to 2009. The humidity inversion occurrence was highest in winter and spring, and high atmospheric pressure and cloud-free conditions generally increased the occurrence. A typical humidity inversion was less than 200 m deep and 0.2 g kg−1 strong, and a typical humidity profile contained several separate inversion layers. The inversion base height had notable seasonal variations, but generally the humidity inversions were located at higher altitudes than temperature inversions. Roughly half of the humidity inversions were associated with temperature inversions, especially near the surface, and humidity and temperature inversion strengths as well as depths correlated at several stations. On the other hand, approximately 60% of the humidity inversions were accompanied by horizontal advection of water vapor increasing with height, which is also a probable factor supporting humidity inversions. The spatial variability of humidity inversions was linked to the topography and the water vapor content of the air. Compared to previous results for the Arctic, the most striking differences in humidity inversions in the Antarctic were a much higher frequency of occurrence in summer, at least under clear skies, and a reverse seasonal cycle of the inversion height. The results can be used as a baseline for validation of weather prediction and climate models and for studies addressing changes in atmospheric moisture budget in the Antarctic.

Corresponding author address: Tiina Nygård, Finnish Meteorological Institute, P.O. Box 503, FI-00101 Helsinki, Finland. E-mail: tiina.nygard@fmi.fi
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  • Bengtsson, L., K. I. Hodges, and S. Hagemann, 2004: Sensitivity of the ERA40 reanalysis to the observing system: Determination of the global atmospheric circulation from reduced observations. Tellus, 56A, 456471.

    • Search Google Scholar
    • Export Citation
  • Bracegirdle, T. J., and G. J. Marshall, 2012: The reliability of Antarctic tropospheric pressure and temperature in the latest global reanalyses. J. Climate, 25, 71387146.

    • Search Google Scholar
    • Export Citation
  • Bromwich, D. H., 1988: Snowfall in high southern latitudes. Rev. Geophys., 26, 149168.

  • Bromwich, D. H., J. P. Nicolas, and A. J. Monaghan, 2011: An assessment of precipitation changes over Antarctica and the Southern Ocean since 1989 in contemporary global reanalyses. J. Climate, 24, 41894209.

    • Search Google Scholar
    • Export Citation
  • Bromwich, D. H., and Coauthors, 2012: Tropospheric clouds in Antarctica. Rev. Geophys., 50, RG1004, doi:10.1029/2011rg000363.

  • Connolley, W. M., and J. C. King, 1993: Atmospheric water-vapour transport to Antarctica inferred from radiosonde data. Quart. J. Roy. Meteor. Soc., 119, 352342.

    • Search Google Scholar
    • Export Citation
  • Cullather, R. I., and M. G. Bosilovich, 2011: The moisture budget of the polar atmosphere in MERRA. J. Climate, 24, 28612879.

  • Cullather, R. I., D. H. Bromwich, and M. L. Van Woert, 1998: Spatial and temporal variability of Antarctic precipitation from atmospheric methods. J. Climate, 11, 334367.

    • Search Google Scholar
    • Export Citation
  • Curry, J. A., 1983: On the formation of continental polar air. J. Atmos. Sci., 40, 22782292.

  • Curry, J. A., W. B. Rossow, D. Randall, and J. L. Shramm, 1996: Overview of Arctic cloud and radiation characteristics. J. Climate, 9, 17311764.

    • Search Google Scholar
    • Export Citation
  • Dee, D. P., and Coauthors, 2011: The ERA-Interim Reanalysis: Configuration and performance of the data assimilation system. Quart. J. Roy. Meteor. Soc., 137, 553597, doi:10.1002/qj.828.

    • Search Google Scholar
    • Export Citation
  • Devasthale, A., J. Sedlar, and M. Tjernström, 2011: Characteristics of water-vapor inversions observed over the Arctic by Atmospheric Infrared Sounder (AIRS) and radiosondes. Atmos. Chem. Phys., 11, 98139823, doi:10.5194/acp-11-9813-2011.

    • Search Google Scholar
    • Export Citation
  • Durre, I., and X. Yin, 2008: Enhanced radiosonde data for studies of vertical structure. Bull. Amer. Meteor. Soc., 89, 12571262.

  • Durre, I., S. V. Russell, and D. B. Wuertz, 2006: Overview of the integrated global radiosonde archive. J. Climate, 19, 5368.

  • Fogt, R. L., and D. H. Bromwich, 2008: Atmospheric moisture and cloud cover characteristics forecast by AMPS. Wea. Forecasting, 23, 914930.

    • Search Google Scholar
    • Export Citation
  • Giovinetto, M. B., D. H. Bromwich, and G. Wendler, 1992: Atmospheric net transport of water vapor and latent heat across 70°S. J. Geophys. Res., 97 (D1 917930.

    • Search Google Scholar
    • Export Citation
  • Giovinetto, M. B., K. Yamazaki, G. Wendler, and D. H. Bromwich, 1997: Atmospheric net transport of water vapor and latent heat across 60°S. J. Geophys. Res., 102 (D10 11 17111 179.

    • Search Google Scholar
    • Export Citation
  • Jakobson, E., T. Vihma, T. Palo, L. Jakobson, H. Keernik, and J. Jaagus, 2012: Validation of atmospheric reanalyses over the central Arctic Ocean. Geophys. Res. Lett., 39, L10802, doi:10.1029/2012gl051591.

    • Search Google Scholar
    • Export Citation
  • Kilpeläinen, T., T. Vihma, M. Manninen, A. Sjöblom, E. Jakobson, T. Palo, and M. Maturilli, 2012: Modelling the vertical structure of the atmospheric boundary layer over Arctic fjords in Svalbard. Quart. J. Roy. Meteor. Soc., 138, 18671883, doi:10.1002/qj.1914.

    • Search Google Scholar
    • Export Citation
  • King, J. C., and J. Turner, 1997: Antarctic Meteorology and Climatology. Cambridge University Press, 409 pp.

  • Medeiros, B., C. Deser, R. A. Tomas, and J. E. Kay, 2011: Arctic inversion strength in climate models. J. Climate, 24, 47334740.

  • Miloshevich, L. M., H. Vömel, D. N. Whiteman, B. M. Lesht, F. J. Schmidlin, and F. Russo, 2006: Absolute accuracy of water vapor measurements from six operational radiosonde types launched during AWEX-G and implications for AIRS validation. J. Geophys. Res., 111, D09S10, doi:10.1029/2005jd006083.

    • Search Google Scholar
    • Export Citation
  • Ohmura, A., 2001: Physical basis for the temperature-based melt-index method. J. Appl. Meteor., 40, 753761.

  • Pavelsky, T. M., J. Boe, A. Hall, and E. J. Fetzer, 2011: Atmospheric inversion strength over polar oceans in winter regulated by sea ice. Climate Dyn., 36, 945955, doi:10.1007/s00382-010-0756-8.

    • Search Google Scholar
    • Export Citation
  • Périard, C., and P. Pettré, 1993: Some aspects of the climatology of Dumont D'Irville, Adélie Land, Antarctica. Int. J. Climatol., 13, 313328, doi:10.1002/joc.3370130307.

    • Search Google Scholar
    • Export Citation
  • Rinke, A., and Coauthors, 2006: Evaluation of an ensemble of Arctic regional climate models: Spatiotemporal fields during the SHEBA year. Climate Dyn., 26, 459472, doi:10.1007/s00382-005-0095-3.

    • Search Google Scholar
    • Export Citation
  • Sedlar, J., and M. Tjernström, 2009: Stratiform cloud—Inversion characterization during the Arctic melt season. Bound.-Layer Meteor., 132, 455474, doi:10.1007/s10546-009-9407-1.

    • Search Google Scholar
    • Export Citation
  • Sedlar, J., M. D. Shupe, and M. Tjernström, 2012: On the relationship between thermodynamic structure and cloud top and its climate significance in the Arctic. J. Climate, 25, 23742393.

    • Search Google Scholar
    • Export Citation
  • Serreze, M. C., A. P. Barrett, and J. Stroeve, 2012: Recent changes in tropospheric water vapor over the Arctic as assessed from radiosondes and atmospheric reanalyses. J. Geophys. Res., 117, D10104, doi:10.1029/2011jd017421.

    • Search Google Scholar
    • Export Citation
  • Slonaker, R. L., and M. L. Van Woert, 1999: Atmospheric moisture transport across the Southern Ocean via satellite observations. J. Geophys. Res., 104 (D8 92299249.

    • Search Google Scholar
    • Export Citation
  • Solomon, A., M. D. Shupe, P. O. G. Persson, and H. Morrison, 2011: Moisture and dynamical interactions maintaining decoupled Arctic mixed-phase stratocumulus in the presence of a humidity inversion. Atmos. Chem. Phys., 11, 10 12710 148, doi:10.5194/acp-11-10127-2011.

    • Search Google Scholar
    • Export Citation
  • Tastula, E.-M., T. Vihma, and E. L Andreas, 2012: Evaluation of polar WRF from modeling the atmospheric boundary layer over Antarctic sea ice in autumn and winter. Mon. Wea. Rev., 140, 39193935.

    • Search Google Scholar
    • Export Citation
  • Tietäväinen, H., and T. Vihma, 2008: Atmospheric moisture budget over Antarctica and the Southern Ocean based on the ERA-40 Reanalysis. Int. J. Climatol., 28, 19771995, doi:10.1002/joc.1684.

    • Search Google Scholar
    • Export Citation
  • Tjernström, M., C. Leck, P. O. G. Persson, M. L. Jenssen, S. P. Oncley, and A. Targino, 2004: The summertime Arctic atmosphere: Meteorological measurements during the Arctic Ocean experiment 2001. Bull. Amer. Meteor. Soc., 85, 13051321.

    • Search Google Scholar
    • Export Citation
  • Tomasi, C., and Coauthors, 2006: Characterization of the atmospheric temperature and moisture conditions above Dome C (Antarctica) during austral summer and fall months. J. Geophys. Res., 111, D20305, doi:10.1029/2005jd006976.

    • Search Google Scholar
    • Export Citation
  • Turner, J., and S. Pendlebury, 2004: The International Antarctic Weather Forecasting Handbook. British Antarctic Survey, 663 pp.

  • Vihma, T., T. Kilpeläinen, M. Manninen, A. Sjöblom, E. Jakobson, T. Palo, J. Jaagus, and M. Maturilli, 2011a: Characteristics of temperature and humidity inversions and low-level jets over Svalbard Fjords in spring. Adv. Meteor., 486807, doi:10.1155/2011/486807.

    • Search Google Scholar
    • Export Citation
  • Vihma, T., E. Tuovinen, and H. Savijärvi, 2011b: Interaction of katabatic winds and near-surface temperatures in the Antarctic. J. Geophys. Res., 116, D21119, doi:10.1029/2010JD014917.

    • Search Google Scholar
    • Export Citation
  • Zhang, Y., D. J. Seidel, J. C. Golaz, C. Deser, and R. A. Tomas, 2011: Climatological characteristics of Arctic and Antarctic surface-based inversions. J. Climate, 24, 51675186.

    • Search Google Scholar
    • Export Citation
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