Forty-day mode and medium range forecasting

Authors

  • AA RAMASASTRY Meteorological Office, Pune
  • US DE Meteorological Office, Pune
  • DV VAIDYA Meteorological Office, Pune
  • G SUNDARI Meteorological Office, Pune

DOI:

https://doi.org/10.54302/mausam.v37i3.2375

Abstract

Recent investigations by different workers have pointed out the existence of a forty-day mode in the rainfall, cloudiness and circulation over the monsoon area. In the present investigation an attempt has been made to examine the potentiality of this, quasi-stationary periodic mode for the purpose of medium range forecasting, of rainfall over the Indian subcontinent. The analyses of the rainfall and mean weekly circulation features over India have been carried out for this purpose for a period of 5 years (1979.83). It is observed that this periodicity is variable from year to year and also from one area to the other in the same year. As compared  to the existing dynamical parameters which can be used as potential parameters for the medium range rainfall forecasting, the forty-day mode in rainfall or circulation does not seem to have a better skill.

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Published

01-07-1986

How to Cite

[1]
A. RAMASASTRY, U. DE, D. VAIDYA, and G. SUNDARI, “Forty-day mode and medium range forecasting”, MAUSAM, vol. 37, no. 3, pp. 305–312, Jul. 1986.

Issue

Vol. 37 No. 3 (1986): MAUSAM

Section

Research Papers

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