Abstract
THE strength of upper winds in India promises to be a useful agent for long-range forecasting in this country. About 1926, Mr. J. H. Field (then Director-General of Indian Observatories) found some important relationships between Agra upper winds in September-October and subsequent winter precipitation over north-west India. Further investigations to forecast March rainfall, which I found to be very important for growth of wheat in the Punjab, revealed a correlation coefficient of - 0.82 between the departures from normal of westerly upper winds in a layer 3 km. to 7 km. over Agra during the second fortnight of December and first fortnight of January and the departures from normal of subsequent rainfall in March over the plains of north-west India. North-west India is taken to consist of the Punjab, the North-West Frontier Province, Sind, Rajputana, and Gujarat. The figures for calculated and actual departures of rainfall over this area are given in the accompanying table and are exhibited graphically in Fig. 1. The upper air data are available for 15 years.
Similar content being viewed by others
Article PDF
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
UNAKAR, M. March Rainfall of North-West India and Agra Upper Winds in December–January. Nature 124, 618 (1929). https://doi.org/10.1038/124618a0
Issue Date:
DOI: https://doi.org/10.1038/124618a0
Comments
By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.