Meteorology and Atmospheric Physics

, Volume 64, Issue 3–4, pp 243–254 | Cite as

Intra-seasonal climate variability of Madagascar. Part 2: Evolution of flood events

  • A. Nassor
  • M. R. Jury


The meteorological structure of flood-producing weather systems affecting northern Madagascar is examined using ECMWF data. Daily rainfall in the austral summer is used to select 16 cases for a composite analysis of flood events in the period 1987–1992. Anomaly maps demonstrate a pair of convective vortices over SE Africa and the SW Indian Ocean which converge over northern Madagascar. Thermodynamic variables indicate an eastward shift of unstable moist conditions from SE Africa. A surge of monsoon northwesterlies and upper tropical easterlies are key features of flood producing systems over NW Madagascar.


Climate Change Vortex Waste Water Water Pollution Indian Ocean 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. Anthes, R. A., 1982: Tropical cyclones: their evolution, structure and effect, Meteor. Monogr., No41,Amer. Meteor. Soc., 208pp.Google Scholar
  2. Donque, G., 1975.Contribution Geographique à l'étude du Climat de Madagascar, N. Impr. Art. Graph, Antananarivo, Madagascar. 417 pp.Google Scholar
  3. Duvergé, P., 1949:Principes de météorologie dynamique et types de temps à Madagascar. Sce Met. M/car,13, Impr Paoli et Fakra Tananarive Madagascar. 134 pp.Google Scholar
  4. Ecormier, J., 1992:Cyclone tropical du sud-ouest de l' Océan Indien: Le cas de l' Ile de la Réunion. Météo France, Reunion. 479pp.Google Scholar
  5. Ferranti, L., Palmer, T. N., Molteni, F., Klinker, E., 1990: Tropical-extratropical interaction associated with the 30–60 day oscillation and its impact on medium and extended range prediction.J. Atmos. Sci.,46, 2177–2199.Google Scholar
  6. Gray, W. M., 1979: Hurricanes: Their formation, structure and likely role in the tropical circulation.Meteorology over the tropical Oceans. D. B. Shaw, Ed., Roy. Meteor. Soc., 278pp.Google Scholar
  7. Jury, M. R., Pathack, B., Campbell, G., Wang, B., Landman, W., 1991. Transient convective waves in the tropical SW Indian Ocean.Meteorol. Atmos. Phys.,47, 27–36.Google Scholar
  8. Jury, M. R., Pathack, B., 1991: A Study of Climate and Weather Variability over the Tropical Southwest Indian Ocean.Meteorol. Atmos. Phys.,47, 37–48.Google Scholar
  9. Jury, M. R., Pathack, B., Wang, B., Powell, M., Raholijao, N., 1993a: A destructive tropical cyclone season in the SW Indian Ocean: January–February 1984.S. Afr. Geogr. J.,72, 53–59.Google Scholar
  10. Jury, M. R., 1993: A preliminary study of climatological associations and characteristics of tropical cyclones in the SW Indian Ocean.Meteorol. Atmos. Phys.,51, 101–115.Google Scholar
  11. Le Borne, J., 1987:Climatologie du sud-ouest de l'Océan Indien, Tome 1: Le cas de l'Ile Maurice. Collection travaux et documents No 204, ORSTOM, France. 358 pp.Google Scholar
  12. Lyons, S. W., 1991: Origins of convective variability over equatorial Southern Africa during austral summer.J. Climate,4, 23–39.Google Scholar
  13. Montgomery, M., Farrell, B., 1993: Tropical Cyclone Formation.J. Atmos. Sci.,50, 285–310.Google Scholar
  14. Naeraa, M., Jury, M. R., 1997: Tropical cyclone composite structure and impacts over eastern Madagascar during January–March 1994,Meteorol. Atmos. Phys. (in press).Google Scholar
  15. Nassor, A., Jury, M. R., 1997: Intra-seasonal climate variability over Madagascar, part 1: Mean summer conditions,Meteorol. Atmos. Phys. (in press).Google Scholar
  16. Padya, B. M., 1989:Weather and Climate of Mauritius. M. Gandhi Instutite, Mauritius. 283 pp.Google Scholar
  17. Riehl, H., 1979:Climate and Weather in the Tropics. London: Academic Press, 611 pp.Google Scholar
  18. Zehnder, J. A., 1991: The interaction of planetary-scale tropical easterly waves with topography: A mechanism for the initiation of tropical cyclones.J. Atmos. Sci. 48, 1217–1230.Google Scholar

Copyright information

© Springer-Verlag 1997

Authors and Affiliations

  • A. Nassor
    • 1
  • M. R. Jury
    • 2
  1. 1.Madagascar Meteorological ServicesAntananarivoMadagascar
  2. 2.Geography Department Climate Impact PredictionsUniversity of ZululandKwa DlangezwaSouth Africa

Personalised recommendations