Barometric Pressure in High Latitudes

Abstract

MR. R. M. DEELEY'S reply in NATURE of August 18 to my letter in the issue of June 21 does not meet my objection, and since he repeats the misleading statement that surface pressure is low at the poles it seems desirable to come to a closer definition of terms. In my letter I made it clear that surface pressure was to be regarded “high” at the poles, not so much in relation to the absolute value as with respect to the belt of minimum pressure—the theatre of maximum cyclonic activity—about latitude 60° N. or S.; but Mr. Deeley under the general term “Arctic regions” does not distinguish between the sub-polar regions about 60° N. or S. and the true polar regions about 90° N. or S.