The authors are very grateful to NCEP for providing the reanalysis-2 data in the public domain. Particular thanks are due to Masao Kanamitsu for his kind assistance in downloading the set. We also acknowledge the assistance of Kevin Keay in the preparation of some of the diagrams. The paper benefited greatly from the excellent suggestions of three reviewers. Parts of this work would not have been possible without an Australian Antarctic Science grant and funding from the Australian Research Council.
Berbery, E. H., , and C. S. Vera, 1996: Characteristics of the Southern Hemisphere winter storm track with filtered and unfiltered data. J. Atmos. Sci., 53 , 468–481.
Bluestein, H. B., 1993: Observations and Theory of Weather Systems.Vol. II. Synoptic–Dynamic Meteorology in Midlatitudes. Oxford University Press, 594 pp.
Bosart, L. F., 1999: Observed cyclone life cycles. The Life Cycles of Extratropical Cyclones, M. A. Shapiro, and S. Grønås, Eds., Amer. Meteor. Soc., 187–213.
Bromwich, D. H., 1991: Mesoscale cyclogenesis over the southwestern Ross Sea linked to strong katabatic winds. Mon. Wea. Rev., 119 , 1736–1752.
Bromwich, D. H., , and T. R. Parish, 1998: Meteorology of the Antarctic. Meteorology of the Southern Hemisphere, D. J. Karoly and D. G. Vincent, Eds., Amer. Meteor. Soc., 175–200.
Buckley, B. W., , and L. M. Leslie, 2000: The Australian Boxing Day storm of 1998—Synoptic description and numerical simulations. Wea. Forecasting, 15 , 543–558.
Bullock, T. A., , and J. R. Gyakum, 1993: A diagnostic study of cyclogenesis in the western North Pacific Ocean. Mon. Wea. Rev., 121 , 65–75.
Carleton, A. M., , and Y. D. Song, 1997: Synoptic climatology, and intrahemispheric associations of cold air mesocyclones in the Australasian sector. J. Geophys. Res., 102 , 13873–13887.
Carnell, R. E., , and C. A. Senior, 1998: Changes in mid latitude variability due to increasing greenhouse gases and sulphate aerosols. Climate Dyn., 14 , 369–383.
Carnell, R. E., , and J. F. B. Mitchell, 1996: An assessment of measures of storminess: Simulated changes in Northern Hemisphere winter due to increasing CO2. Climate Dyn., 12 , 467–476.
Chen, S-J., , Y-H. Kuo, , P-Z. Zhang, , and Q-F. Bai, 1992: Climatology of explosive cyclones off the east Asian coast. Mon. Wea. Rev., 120 , 3029–3035.
Foley, G. R., , and B. N. Hanstrum, 1994: The capture of tropical cyclones by cold fronts off the west coast of Australia. Wea. Forecasting, 9 , 577–592.
Graham, N. E., , and H. F. Diaz, 2001: Evidence for intensification of North Pacific winter cyclones since 1948. Bull. Amer. Meteor. Soc., 82 , 1869–1893.
Gulev, S. K., , O. Zolina, , and S. Grigoriev, 2001: Extratropical cyclone variability in the Northern Hemisphere winter from the NCEP/NCAR reanalysis data. Climate Dyn., 17 , 795–809.
Gustafsson, M. E. R., 1997: Raised levels of marine aerosol deposition owing to increased storm frequency: A cause of forest decline in southern Sweden? Agric. For. Meteor., 84 , 169–177.
Gyakum, J. R., , and R. E. Danielson, 2000: Analysis of meteorological precursors to ordinary and explosive cyclogenesis in the western North Pacific. Mon. Wea. Rev., 128 , 851–863.
Gyakum, J. R., , J. R. Anderson, , R. H. Grumm, , and E. L. Gruner, 1989: North Pacific cold-season surface cyclone activity: 1975–1983. Mon. Wea. Rev., 117 , 1141–1155.
Harr, P. A., , and R. L. Elsberry, 2000: Extratropical transition of tropical cyclones over the western North Pacific. Part I: Evolution of structural characteristics during the transition process. Mon. Wea. Rev., 128 , 2613–2633.
Holland, G. J., 1984: On the climatology and structure of tropical cyclones in the Australian/southwest Pacific region. II: Hurricanes. Aust. Meteor. Mag., 32 , 17–31.
Holland, G. J., , A. H. Lynch, , and L. M. Leslie, 1987: Australian east coast cyclones. Part I: Synoptic overview and case study. Mon. Wea. Rev., 115 , 3024–3036.
Kanamitsu, M., , R. E. Kistler, , and R. W. Reynolds, 1997: NCEP/NCAR reanalysis and the use of satellite data. Satellite Data Applications: Weather and Climate, Pergamon Press, 481–489.
Kanamitsu, M., , W. Ebisuzaki, , J. Woolen, , J. Potter, , and M. Fiorino, 2000: Overview of NCEP/DOE Reanalysis-2. Proc. Second Int. WCRP Conf. on Reanalysis, Wokefield Park, Reading, United Kingdom, WCRP-109, WMO/TD-No. 985, 1–4.
Key, J. R., , and A. C. K. Chan, 1999: Multidecadal global and regional trends in 1000 mb and 500 mb cyclone frequencies. Geophys. Res. Lett., 26 , 2053–2056.
Kistler, R., and Coauthors. 2001: The NCEP–NCAR 50-Year Reanalysis: Monthly means CD-ROM and documentation. Bull. Amer. Meteor. Soc., 82 , 247–267.
Knippertz, P., , U. Ulbrich, , and P. Speth, 2000: Changing cyclones and surface wind speeds over the North Atlantic and Europe in a transient GHG experiment. Climate Res., 15 , 109–122.
Kuo, Y-H., , and S. Low-Nam, 1990: Prediction of nine explosive cyclones over the western Atlantic Ocean with a regional model. Mon. Wea. Rev., 118 , 3–25.
Kuo, Y-H., , J. R. Gyakum, , and Z. T. Guo, 1995: A case of rapid continental mesoscale cyclogenesis. Part I: Model sensitivity experiments. Mon. Wea. Rev., 123 , 970–997.
Lambert, S. J., 1995: The effect of enhanced greenhouse warming on winter cyclone frequencies and strengths. J. Climate, 8 , 1447–1452.
Lambert, S. J., . 1996: Intense extratropical Northern Hemisphere winter cyclone events: 1899–1991. J. Geophys. Res., 101 , 21319–21325.
Leonard, S. R., , J. Turner, , and A. Van Der Wal, 1999: An assessment of three automatic depression tracking schemes. Meteor. Appl., 6 , 173–183.
Leslie, L. M., , and M. S. Speer, 1998: Short-range ensemble forecasting of explosive Australian east coast cyclogenesis. Wea. Forecasting, 13 , 822–832.
Lim, E-P., , and I. Simmonds, 2001: Meteorological ‘bombs' over the Southern Hemisphere. Research Activities in Atmospheric and Oceanic Modelling, H. Ritchie, Ed., WMO Rep. 31, WMO/TD-No. 1064, 2.16–2.17.
McCabe, G. J., , M. P. Clark, , and M. C. Serreze, 2001: Trends in Northern Hemisphere surface cyclone frequency and intensity. J. Climate, 14 , 2763–2768.
Murray, R. J., , and I. Simmonds, 1995: Responses of climate and cyclones to reductions in Arctic winter sea ice. J. Geophys. Res., 100 , 4791–4806.
Nielsen, J. W., , and R. M. Dole, 1992: A survey of extratropical cyclone characteristics during GALE. Mon. Wea. Rev., 120 , 1156–1167.
Revell, M. J., , and R. N. Ridley, 1995: The origin and evolution of low-level potential vorticity anomalies during a case of Tasman Sea cyclogenesis. Tellus, 47A , 779–796.
Sanders, F., 1986: Explosive cyclogenesis in the west-central North Atlantic Ocean, 1981–84. Part I: Composite structure and mean behavior. Mon. Wea. Rev., 114 , 1781–1794.
Sanders, F., , and C. A. Davis, 1988: Patterns of thickness anomaly for explosive cyclogenesis over the west-central North Atlantic Ocean. Mon. Wea. Rev., 116 , 2725–2730.
Seluchi, M. E., , and A. C. Saulo, 1998: Possible mechanisms yielding an explosive coastal cyclogenesis over South America: Experiments using a limited area model. Aust. Meteor. Mag., 47 , 309–320.
Simmonds, I., , and X. Wu, 1993: Cyclone behaviour response to changes in winter Southern Hemisphere sea-ice concentration. Quart. J. Roy. Meteor. Soc., 119 , 1121–1148.
Simmonds, I., , and T. H. Jacka, 1995: Relationships between the interannual variability of Antarctic sea ice and the Southern Oscillation. J. Climate, 8 , 637–647.
Simmonds, I., , and D. A. Jones, 1998: The mean structure and temporal variability of the semiannual oscillation in the southern extratropics. Int. J. Climatol., 18 , 473–504.
Simmonds, I., , and R. J. Murray, 1999: Southern extratropical cyclone behavior in ECMWF analyses during the FROST Special Observing Periods. Wea. Forecasting, 14 , 878–891.
Simmonds, I., , and K. Keay, 2000a: Mean Southern Hemisphere extratropical cyclone behavior in the 40-year NCEP–NCAR reanalysis. J. Climate, 13 , 873–885.
Simmonds, I., , and K. Keay, 2000b: Variability of Southern Hemisphere extratropical cyclone behavior 1958–97. J. Climate, 13 , 550–561.
Simmonds, I., , R. J. Murray, , and R. M. Leighton, 1999: A refinement of cyclone tracking methods with data from FROST. Aust. Meteor. Mag., Special Edition,. 35–49.
Sinclair, M. R., . 1997: Objective identification of cyclones and their circulation intensity, and climatology. Wea. Forecasting, 12 , 595–612.
Turner, J., , and J. P. Thomas, 1994: Summer-season mesoscale cyclones in the Bellingshausen–Weddell region of the Antarctic and links with the synoptic-scale environment. Int. J. Climatol., 14 , 871–894.
Turner, J., , G. J. Marshall, , and T. A. Lachlan-Cope, 1998: Analysis of synoptic-scale low pressure systems within the Antarctic Peninsula sector of the circumpolar trough. Int. J. Climatol., 18 , 253–280.
van Loon, H., 1967: The half-yearly oscillations in middle and high southern latitudes and the coreless winter. J. Atmos. Sci., 24 , 472–486.
Wang, C. C., , and J. C. Rogers, 2001: A composite study of explosive cyclogenesis in different sectors of the North Atlantic. Part I: Cyclone structure and evolution. Mon. Wea. Rev., 129 , 1481–1499.
Zhang, Y., , and W-C. Wang, 1997: Model-simulated northern winter cyclone and anticyclone activity under a greenhouse warming scenario. J. Climate, 10 , 1616–1634.