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Original Research Papers

Climatology and variability of Southern Hemisphere marine cold-air outbreaks

Authors:

Thomas J. Bracegirdle ,

British Antarctic Survey, Cambridge CB3 0ET, GB
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Erik W. Kolstad

Bjerknes Centre for Climate Research, Bergen, NO
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Abstract

Marine cold air outbreaks (MCAOs) are events where cold air flows over a relatively warm sea surface. Such outbreaks are associated with severe mesoscale weather systems that are not generally resolved in global climate models, such as polar lows and boundary-layer fronts. Here, an analysis of winter climatology and variability of MCAOs in the Southern Hemisphere (SH) is presented. Near the sea ice edge, north—south fluctuations of the Southern Annular Mode (SAM) index are key, while further north, large-scale wave disturbances are needed to move air masses far enough away from the Antarctic continent to instigate MCAOs. Unlike in the Northern Hemisphere (NH), the spatial patterns of mean and extreme values of the MCAO index differ considerably. Near 60◦S, both mean and extreme values of the index are similar to those found in the main MCAO regions in the NH. Further north, the mean MCAO index is quite high, but the extreme values are much lower than in the NH. We conclude that MCAOs in the SH are as widespread and can be as strong as in the NH, but severe MCAOs near densely populated regions such as the Tasman Sea are less common than in the Nordic Seas and near Japan.

How to Cite: Bracegirdle, T.J. and Kolstad, E.W., 2010. Climatology and variability of Southern Hemisphere marine cold-air outbreaks. Tellus A: Dynamic Meteorology and Oceanography, 62(2), pp.202–208. DOI: http://doi.org/10.1111/j.1600-0870.2009.00431.x
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  Published on 01 Jan 2010
 Accepted on 3 Dec 2009            Submitted on 18 Aug 2009

References

  1. Blechschmidt , A. M. , Balcan , S. and Grassl , H . 2009 . Large-scale atmo-spheric circulation patterns during polar low events over the Nordic seas . J. Geophys. Res . 114 , D06115 , https://doi.org/10.1029/2008jd010865 .  

  2. Blier , W . 1996 . A numerical modeling investigation of a case of polar airstream cyclogenesis over the Gulf of Alaska . Mon. Wea. Rev . 124 , 2703 – 2725 .  

  3. Bromwich , D. H. and Fogt , R. L . 2004 . Strong trends in the skill of the ERA-40 and NCEP-NCAR reanalyses in the high and midlatitudes of the southern hemisphere, 1958-2001 . J. Clim . 17 , 4603 – 4619 .  

  4. Bromwich , D. H. , Fogt , R. L. , Hodges , K. I. and Walsh , J. E . 2007 . A tropospheric assessment of the ERA-40, NCEP, and JRA-25 global reanalyses in the polar regions . J. Geophys. Res . 112 , D10111 , https://doi.org/10.1029/2006jd007859 .  

  5. Carleton , A. M . 1985 . Satellite climatological aspects of the “polar low” and “instant occlusion” . Tellus 37A , 433 – 450 .  

  6. Carleton , A. M. and Carpenter , D. A . 1990 . Satellite climatology of ‘polar lows’ and broadscale climatic associations for the southern hemisphere . Int. J. Climatol . 10 , 219 – 246 .  

  7. Carleton , A. M. and Fitch , M . 1993 . Synoptic aspects of Antarctic meso-cyclones . J. Geophys. Res . 98 , 12997 – 13018 .  

  8. Carleton , A. M. and Song , Y . 1997 . Synoptic climatology, and intra-hemispheric associations, of cold air mesocyclones in the Australasian sector . J. Geophys. Res . 102 , 13873 – 13887 .  

  9. Claud , C. , Carleton , A. M. , Duchiron , B. and Terray , P . 2009 . South-ern hemisphere winter cold-air mesocyclones: climatic environments and associations with teleconnections . Clim. Dyn . 33 , 383 – 408 , https://doi.org/10.1007/s00382-008-0468-5 .  

  10. Condron , A. , Bigg , G. R. and Renfrew , I. A . 2008 . Modeling the impact of polar mesocyclones on ocean circulation . J. Geophys. Res.-Oceans 113 , C10005 , https://doi.org/10.1029/2007jc004599 .  

  11. Craig , G. C. and Gray , S. L . 1996 . CISK or WISHE as the Mechanism for Tropical Cyclone Intensification . J. Atmos. Sci . 53 , 3528 – 3540 .  

  12. Dorman , C. E. , Beardsley , R. C. , Dashko , N. A. , Friehe , C. A. , Kheilf , D. and co-authors . 2004 . Winter marine atmospheric con-ditions over the Japan Sea. J. Geophys. Res.-Oceans 109 , C12011 , https://doi.org/10.1029/2001jc001197 .  

  13. Gillett , N. P. and Thompson , D. W. J . 2003 . Simulation of recent Southern Hemisphere climate change . Science 302 , 273 – 275 .  

  14. Grønås , S. and Kvamsto , N. G . 1995 . Numerical simulations of the synoptic conditions and development of Arctic outbreak polar lows . Tellus 47A , 797 – 814 .  

  15. Grønås , S. and Skeie , P . 1999 . A case study of strong winds at an Arctic front . Tellus 51 , 865 – 879 .  

  16. Harold , J. M. , Bigg , G. R. and Turner , J . 1999 . Mesocyclone activity over the North-East Atlantic. Part 1: vortex distribution and variability . Int. J. Climatol . 19 , 1187 – 1204 .  

  17. Hoskins , B. J. and Hodges , K. I . 2005 . A new perspective on Southern Hemisphere storm tracks . J. Clim . 18 , 4108 – 4129 .  

  18. Inatsu , M. and Hoskins , B. J . 2004 . The zonal asymmetry of the Southern Hemisphere winter storm track . J. Clim . 17 , 4882 – 4892 .  

  19. Jolliffe , I. T . 2002 . Principle Component Analysis . Springer-Verlag , New York .  

  20. Kalnay , E. , Kanamitsu , M. , Kistler , R. , Collins , W. , Deaven , D. and co-authors . 1996 . The NCEP/NCAR 40-year reanalysis project. Bull. Am. Meteorol. Soc . 77 , 437 – 471 .  

  21. Karoly , D. J . 1989 . Southern Hemisphere circulation features associated with El Nino-Southern Oscillation events . J. Clim . 2 , 1239 – 1252 .  

  22. Kolstad , E. W. and Bracegirdle , T. J . 2008 . Marine cold-air outbreaks in the future: an assessment of IPCC AR4 model results for the Northern Hemisphere . Clim. Dyn . 30 , 871 – 885 .  

  23. Kolstad , E. W. , Bracegirdle , T. J. and Seierstad , I. A . 2009 . Marine cold-air outbreaks in the North Atlantic: temporal distribution and associations with large-scale atmospheric circulation . Clim. Dyn . 33 , 187 – 197 , https://doi.org/10.1007/s00382-008-0431-5 .  

  24. Laing , A. K. and Reid , S. J . 1999 . Evidence of mesoscale lows off the west coast of New Zealand . Wea. Forecast . 14 , 369 – 383 .  

  25. Lau , K. M. , Sheu , P. J. and Kang , I. S . 1994 . Multiscale Low-Frequency Circulation Modes in the Global Atmosphere . J. Atmos. Sci . 51 , 1169 – 1193 .  

  26. Limpasuvan , V. and Hartmann , D. L . 2000 . Wave-maintained annular modes of climate variability . J. Clim . 13 , 4414 – 4429 .  

  27. Marshall , G. J . 2002 . Trends in Antarctic geopotential height and temper-ature: a comparison between radiosonde and NCEP-NCAR reanalysis data . J. Clim . 15 , 659 – 674 .  

  28. Marshall , G. J . 2007 . Half-century seasonal relationships between the Southern Annular Mode and Antarctic temperatures . Int. J. Climatol . 27 , 373 – 383 , https://doi.org/10.1002/joc.1407 .  

  29. Mo , K. C . 2000 . Relationships between low-frequency variability in the Southern Hemisphere and sea surface temperature anomalies . J. Clim . 13 , 3599 – 3610 .  

  30. Økland , H . 1998 . Modification of frontal circulations by surface heat flux . Tellus 50A , 211 – 218 .  

  31. Rasmussen , E. A. and Turner , J . 2003 . Polar Lows: Mesoscale Weather Systems in the Polar Regions . Cambridge University Press, Cam-bridge , UK .  

  32. Thompson , D. W. J. and Wallace , J. M . 2000 . Annular modes in the extratropical circulation. Part I: month-to-month variability . J. Clim . 13 , 1000 – 1016 .  

  33. Vavrus , S. , Walsh , J. E. , Chapman , W. L. and Portis , D . 2006 . The Behaviour of extreme cold air outbreaks under greenhouse warming . Int. J. Climatol . 26 , 1133 – 1147 .  

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