Large Scale Features of Southwest Monsoon During 2015

TL;DR

This paper analyzes the large-scale features of the 2015 southwest monsoon, which was notably deficient with only 86% of the normal rainfall, marking a significant deviation from typical seasonal patterns.

Contribution

It provides a detailed examination of the monsoon's large-scale features during 2015, highlighting its deficiency and comparing it with historical episodes of similar rainfall deficits.

Findings

2015 monsoon had 86% of normal rainfall

2015 was the fourth consecutive year of deficient monsoon

Historical comparison with 1904-05, 1965-66, 1986-87 episodes

Abstract

During 2015, the southwest monsoon (SWM) rainfall over the country remained deficient with seasonal rainfall of about 86% of the long period average (Table 1.1). Last year, the seasonal rainfall deficiency over the country as a whole was 12% (www.imd.gov.in). Thus, this is a fourth episode of two consecutive years, with deficient monsoon, similar to 1904-05, 1965-66 and 1986-87 (www.imd.gov.in).