Question raised in Lok Sabha on Impact of Climate Change on Rainfall Distribution Pattern, 04/08/2016. Climate change has significant impact on rainfall distribution pattern of the country. Based on the analysis of rainfall data of more than 100 years, India Meteorological Department and other institutions have observed that there is no observed significant changes in all India southwest monsoon rainfall. However, multi-decadal epochs having frequent droughts and flood years with alternate sequence have been observed in the all India monsoon rainfall data. Significant changes in distribution of rainfall pattern over regional scales and also increasing trends in the frequency of extreme rainfall events in different parts of the country are being observed.