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Van Den Broeke, M. R.; Van Lipzig, N. P.M. (2011)
Publisher: Co-Action Publishing
Journal: Tellus A
Languages: English
Types: Article
Observations show that wintertime low level wind and temperatures in East Antarctica respondmarkedly to variations in the Southern Hemisphere circumpolar vortex. To explain this, we use outputof a regional climate model RACMO/ANT1. A strong vortex extends far to the south and to relativelylow atmospheric levels, which reduces the strength and directional constancy of the low-level easterlies.Over the ocean, the easterlies south of the circumpolar pressure trough (CPT) are significantlyweakened and the westerlies north of it enhanced. Over the ice sheet, an increased katabatic forcingcounteracts the weakening of the easterly near-surface winds. Together with the increased backgroundtemperature gradient, which enhances west-to-east turning of the large scale winds, the wind effectsof vortex variability over the East Antarctic ice sheet are limited. Pronounced temperature effects arefound on the ice sheet: under strong vortex conditions the lower troposphere over East Antarcticacools by 1–3 K through decreased meridional exchange of air. In addition, the weaker low-level easterliesreduce downward mixing of warm air, which causes additional cooling by up to 1.5 K at thesurface.DOI: 10.1034/j.1600-0870.2002.201383.x 
  • The results below are discovered through our pilot algorithms. Let us know how we are doing!

    • Allison, I., Wendler, G. and Radok, U. 1993. Climatology of the East Antarctic ice sheet (100◦E to 140◦E) derived from automatic weather stations. J. Geophys. Res. 98, 8815- 8823.
    • Burnett, A. W. and McNicoll, A. R. 2000. Interannual variations in the southern hemisphere winter circumpolar vortex: relationships with the semiannual oscillation. J. Climate 13, 991-999.
    • Connolley, W. M. 1996. The Antarctic temperature inversion. Int. J. Climatol. 16, 1333-1342.
    • Doran, P. T., Priscu, J. C., Lyons, W. B., Walsh, J. E., Fountain, A. G., McKnight, D. M., Moorhead, D. L., Virginia, R. A., Wall, D. H., Clow, G. D., Fritsen, C. H., McKay, C. P. and Parsons, A. N. 2002. Antarctic climate cooling and terrestrial ecosystem response. Nature 415, 517-520.
    • Jones, P. D. 1995. Recent variations in mean temperature and the diurnal temperature range in the Antarctic. Geophys. Res. Lett. 22, 1345-1348.
    • King, J. C. and Harangozo, S. A. 1998. Climate change in the western Antarctic Peninsula since 1945: observations and possible causes. Ann. Glac. 27, 571-575.
    • Mahrt, L. 1982. Momentum balance of gravity flow. J. Atmos. Sci. 39, 2701-2711.
    • Mather K. B. and Miller, G. S. 1967. Notes on topographic factors affecting the surface wind in Antarctica, with special reference to katabatic winds and bibliography. Geophys. Inst. Rep. UAGR-189, University of Alaska, Fairbanks, 125 pp.
    • Meehl, G. A., Hurrel, J. W. and Van Loon, H. 1998. A modulation of the mechanism of the semiannual oscillation in the Southern Hemisphere. Tellus 50A, 442-450.
    • Parish, T. R. and Waight, K. T. 1987. The forcing of Antarctic katabatic winds. Mon. Wea. Rev. 115, 2214-2226.
    • Parish, T. R. and Bromwich, D. H. 1987. The surface windfield over the Antarctic ice sheets. Nature 328, 51- 54.
    • Parish, T. R. and Cassano, J. J. 2001. Forcing of the wintertime Antarctic boundary layer winds from the NCEPNCAR global reanalysis. J. Appl. Meteorol. 40, 810- 821.
    • Raper, S. C. B., Wigley, T. M. L., Mayes, P. R., Jones, P. D. and Salinger, M. J. 1984. Variations in surface air temperature. Part 3: the Antarctic, 1957-82. Mon. Wea. Rev. 112, 1341-1353.
    • Scambos, T. A., Hulbe, C., Fahnestock, M. and Bohlander, J. 2000. The link between climate warming and break-up of ice shelves in the Antarctic Peninsula. J. Glaciol., 154, 516-530.
    • Thompson, D. W. J. and Wallace, J. M. 2000. Annular modes in the extratropical circulation. Part I: Month-to-month variability. J. Climate 13, 1000-1016.
    • Thompson, D. W. J. and Solomon, S. 2002. Interpretation of recent Southern Hemisphere climate change. Science 296, 895-899.
    • Van den Broeke, M. R. 2000a. The semi-annual oscillation and Antarctic climate, part 5: Impact on the annual temperature cycle as derived from NCEP re-analysis. Clim. Dynamics 16, 369-377.
    • Van den Broeke, M. R. 2000b. On the interpretation of Antarctic temperature time series. J. Climate 13, 3885- 3889.
    • Van den Broeke, M. R., van Lipzig, N. P. M. and van Meijgaard, E. 2002. Momentum budget of the East-Antarctic atmospheric boundary layer: results of a regional climate model. J. Atmos. Sci., in press.
    • Van Lipzig, N. P. M. 1999. The surface mass balance of the Antarctic ice sheet: a study with a regional atmospheric model. PhD Thesis, Utrecht University, The Netherlands (can be obtained from IMAU, P.O. Box 80005, 3508 TA Utrecht, The Netherlands).
    • Van Lipzig, N. P. M., van Meijgaard, E. and Oerlemans, J. 1999. Evaluation of a regional atmospheric model using measurements of surface heat exchange processes from a site in Antarctica. Mon. Wea. Rev. 127, 1994-2011.
    • Van Loon, H. 1967. The half-yearly oscillation in the middle and high southern latitudes and the coreless winter. J. Atmos. Sci. 24, 472-486.
    • Vaughan, D. G. and Doake, C. S. M. 1996. Recent atmospheric warming and retreat of ice shelves on the Antarctic Peninsula. Nature 379, 328-331.
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