Spells of abnormally cold and hot days at Poona

Abstract

 A fifty year record of daily maximum temperature during April and May and daily minimum temperatures during the period December and January at Poona is examined with reference to spells of abnormally hot weather in 8t1mmer and abnormally cold weather in winter. It is found that an empirical relationship of the form Sx =Ka^x holds good, where Sx is the frequency of a particular spell lasting for x days and K and a are the Parameters determinable from the data. This provides a means of assessing the chance of occurrence of a spell of particular length. The frequencies were also represented by the logarithmic series Sx= x/ix where Sx and x have the same notations as referred to &bove, 13 and, being determinable from the data. The results obtained by both the geometric series and the longarithmic stries are compared and discussed in the paper.