Evaluation of change points and persistence of extreme climatic indices across India

摘要

Abstract This study performs the evaluation of change points and persistence of extreme climatic indices over India for the first time. Nine annual extreme precipitation indices (EPIs) and four annual extreme temperature indices (ETIs) across India are determined based on the daily data of precipitation, maximum and minimum temperature at 1° × 1° resolution of 1951–2015 period. The single change point analysis of all the thirteen indices of 277 grid points using Pettitt test showed that majority of the grids displayed a change during 1975–1985 period, showing good agreement with the global climate shift of 1976/77. The Hurst exponent estimates indicated that the persistence of EPIs is more erratically distributed than that of ETIs. Different indices possess strong long term persistence in the peninsular and coastal regions, especially for the number of tropical nights series.