This paper is based on the spatio-temporal analysis of daily, monthly and seasonal rainfall variability over Maharashtra state of the Indian region, for the period 1901–2017 during summer monsoon, viz., June through September. This analysis is carried out over Maharashtra’s four sub-divisions, where mean rainfall received for JJAS (1901–2017) is more over Konkan and Goa and east Vidarbha and less over Madhya Maharashtra. Coefficient of variation is considered to understand spatial variability of total rainfall received during JJAS by the state. The percentage of rainy days is found to be more for July and August months compared to June and September months as per the advancement of monsoonal flow noticeable through this study. Hence, contribution to JJAS rainfall more from July month proceeded with August month is considerable. September month contribution is the least; nevertheless its contribution is prominent from south Madhya Maharashtra. Rainfall variability is linked with El Niño and La Niña, by calculating composites of standardized rainfall anomalies and % rainy days during El Niño and La Niña years, which show that monthly and seasonal rainfall, are modulated by variations in SSTs of equatorial central Pacific Ocean. Thus this study aims to analyze the changing pattern of rainfall over Maharashtra and its sub-division as linking El-Niño and La-Niña events with rainfall received over small domain is the need of the hour as each region behaves differently during El-Niño or La-Niña.

本文基于时空分析，分析了印度地区马哈拉施特拉邦1901-2017年6月至9月夏季风期间的每日，每月和季节性降雨变化。该分析是在马哈拉施特拉邦的四个分区中进行的，JJAS（1901-2017年）收到的平均降雨在康坎，果阿和维达尔巴东部地区更多，而在中央邦马哈拉施特拉邦则更少。为了了解国家在JJAS期间接收到的总降雨量的空间变异性，考虑了变异系数。根据这项研究发现的季风流量增加，发现7月和8月的雨天百分比高于6月和9月的雨天百分比。因此，从7月到8月，对JJAS降雨的贡献更大。九月份的贡献最少。然而，它的贡献在南部中央邦（Madhya Maharashtra）方面很突出。通过计算厄尔尼诺和拉尼娜年期间标准化降雨异常和雨天百分比的复合值，降雨变异性与厄尔尼诺和拉尼娜现象相关，这表明月度和季节降雨受赤道中太平洋太平洋海表温度变化的影响。因此，本研究旨在分析马哈拉施特拉邦及其分区的降雨变化模式，因为将El-Niño和La-Niña事件与小范围内收到的降雨联系起来是一个小时的需要，因为每个地区在El-Niño或拉尼娜。通过计算厄尔尼诺和拉尼娜年期间标准降雨异常和雨天百分比的复合材料，这表明月度和季节降雨受赤道中太平洋太平洋海表温度变化的影响。因此，本研究旨在分析马哈拉施特拉邦及其分区的降雨变化模式，因为将El-Niño和La-Niña事件与小范围内收到的降雨联系起来是一个小时的需要，因为每个地区在El-Niño或拉尼娜。通过计算厄尔尼诺和拉尼娜年期间标准降雨异常和雨天百分比的复合材料，这表明月度和季节降雨受赤道中太平洋太平洋海表温度变化的影响。因此，本研究旨在分析马哈拉施特拉邦及其分区的降雨变化模式，因为将El-Niño和La-Niña事件与小范围接收的降雨联系起来是一个小时的需要，因为每个地区在El-Niño或拉尼娜。