Correlation of upper air variables

Mahalanobis, P. C. (1923) Correlation of upper air variables Nature, 112 (2809). pp. 323-324. ISSN 0028-0836

Full text not available from this repository.

Official URL:

Related URL:


In view of the importance of the subject, a few remarks with regard to the note in Nature of May 19, p. 684, on "Correlation of Upper Air Variables" may perhaps be permitted me, chiefly with the object of making clear the real issues in this question. Dines found very high coefficients of correlation (of the order of 0.8) between various upper air variables, specially with pressure at 9-kilometre level. This led to the formulation of the Dines-Shaw theory of the sub-stratosphere and the regions above 9 kilometres as the real seat of origin of meteorological causes. In 1920, Chapman applied certain statistical corrections to the coefficients of correlation found by Dines and raised these to +1.00 in several instances. A correlation of +1.00 establishes absolute causal nexus. A conclusion of this nature demands close scrutiny, specially as it is being widely quoted and applied in current writings. In a recent memoir noticed in Nature I have examined the statistical analysis in some detail.

Item Type:Article
Source:Copyright of this article belongs to Nature Publishing Group.
ID Code:35021
Deposited On:12 Apr 2011 08:40
Last Modified:12 Apr 2011 08:40

Repository Staff Only: item control page