Ukrainian Antarctic Journal

No 3 (2005): Ukrainian Antarctic Journal

Climatic indices of the Southern Hemisphere and their relation to tropospheric circulation

V. E. Timofeyev
Odessa State Environmental University, Odessa
Published December 15, 2005
  • climatic indices,
  • south annular mode,
  • pressure wave,
  • El Nino - Southern Oscillation
How to Cite
Timofeyev, V. E. (2005). Climatic indices of the Southern Hemisphere and their relation to tropospheric circulation. Ukrainian Antarctic Journal, (3), 85-92.


Climatic indices of the Southern Hemisphere are described using data of the World Data Center (Moscow) and Reanalysis data. Using of the Southern Annular mode (SAM) for simulation of Antarctic climate and tropospheric circulation is discussed. It is concluded that hemispherical SAM describes only common aspects of climate change as well as reflects general properties of tropospheric circulation. Calculation of local indices is needed to describe peculiarities of regional circulation. Synoptic analysis of anticyclonic process brought in cold winter spells to the Antarctic Peninsula region is made. It is shown that anticyclones can be omitted or underestimated when analyzing SAM. Important changes in the multi-years’ course of parameters of the semi-annual pressure wave are found by the data of Vernadsky base: smoothing of summer pressure peak and displacement of winter minimum. These changes are attributed to regional warming at the Antarctic Peninsula region. El-Nino phenomenon  impacts on regional tropospheric circulation and weather conditions at Antarctic Peninsula region are discussed. ENSO influence on weather conditions at Antarctic Peninsula tends to be maximized in years with different ENSO episodes, when pools of alternative anomalies of barometric pressure are formed in extratropical regions of the South Hemisphere. Winter air temperature anomalies at Antarctic Peninsula are caused by more frequent anticyclogenesis in years after cold ENSO episode, with intensive blocking in mid - and polar-latitudes. It was concluded that stabilization of warming at the Antarctic Peninsula during the recent years occurred at the background of prolongated ENSO events.


  1. Atlas Antarktiki [Atlas of Antarctica]. (1969). V. 2, Leningrad, Gidrometeoizdat. (In Russian)
  2. Bagrov, N.A. (1978). Ob ispolzovanii tipov cirkuliacii E, W, C dlia prognozov [On using E, W, C circulation types for prognoses]. Trudy Gidrometcentra SSSR, 195, 39-45. (In Russian)
  3. Grischenko, V.F., Timofeev, V.Ie., & Klok, S. (2005). Reakcii komponentov gliaciosfery na izmenenia klimata v raione Antarkticheskogo poluostrova [Reactions of glaciosphere's components to climate change in the Antarctic Peninsula region]. Ukrainian Antarctic Journal, 3. (In Russian)
  4. Fyfe, J.C., Boer, G.I., & Flato, G.M. (1999). The Arctic and Antarctic Oscillations and their projected changes under global warming. Geophys. Res. Lett., 26(11), 1601-1604.
  5. van den Broeke, M. (2000). On the interpretation of Antarctic Temperature trends. J. of Climate, 13, 3885-3891.
  6. Hughes, C., Woodworth, P., Meredith, M., Stepanov, V., Whitworth, T., & Pyne, A. (2003). Coherence of Antarctic sea levels, South Hemisphere annular mode and flow through Drake Passage. Geoph. Res. Lett., 30(9), 17, 1-4.
  7. Kidson, J.W. (1994). Indices of the Southern Hemisphere zonal wind. J. of Climate, 1, 183-194.
  8. Marshall, G.J. (2003). Trends in the Southern Annular Mode from Observations and Reanalysis. J. of Climate, 16, 4134-4143.
  9. Marshall, G.J., & King, J.C. (1998). Southern Hemisphere circulation anomalies associated with extreme Antarctic Peninsula winter temperatures. Geoph. Res. Lett., 25(13), 2437-2440.
  10. Panagiotopoulos, F., Shahgedanova, M., & Stephenson, D.B. (2002). A review of Northern Hemisphere teleconnection patterns. J. Phys. IV France, 12, 27-48.
  11. Trenberth, K.E., & Hoar, T. (1996). The 1990-1995 El-Nino - Southern Oscillation events: Longest on Record. Geoph. Res. Lett., 23, 57-60.
  12. Turner, J. (2004). The El-Nino and Antarctica. Int. J. of Climatol., 24, 1-32.
  13. Xie, S., Bao, C., Xue, Z., Zhang, L., & Hao, C. (2001). Interaction between Antarctic sea ice and ENSO events. In: Proc. NIPR Sympos. on Polar Meteorology and Glaciology. P. 95-100.