This study investigated the multifractal characteristics of fine resolution (0.25^ox0.25°) daily gridded rainfall fields of India over the period 1901–2013 to examine their spatiotemporal variability. The scaling characterization using Multifractal Detrended Fluctuation Analysis (MFDFA) detected short-term persistency and strong multifractality in the majority of rainfall (over 81%) of the grid points. A detailed exploration on the spatial variability of multifractal properties such as Hurst exponent, spectral width, asymmetry index, Hölder exponent are also performed for six rainfall homogenous regions and 34 meteorological subdivisions in India. The results showed that the highest persistence and complexity is noted in the mountainous terrains of northern and northeastern India. The sub-divisional scale analysis showed that the variability of persistence and complexity is the highest in Kerala and lowest at Vidarbha. Further, the evaluation of multifractal properties of rainfall series of pre- and post-1976/77 Pacific climate shift showed an increase in strength of multifractality in 62% grids after the shift. Changes in the status of persistence with respect to 1976/77 is the highest at Uttaranchal subdivision and changes from positive to negative asymmetry was the highest at northwestern (NW) region. Grid points of Peninsular India exhibited least reduction in complexity, multifractality and persistence in the post-1977 period when compared to pre-1977 period.

本研究调查了精细分辨率（0.25 ^o1901年至2013年间，印度的x0.25°）日栅格降雨场用于检验其时空变化。使用多重分形趋势波动分析（MFDFA）进行的标度表征在大多数降雨点（超过81％）中检测到了短期持久性和强多重分形性。还对印度的六个降雨同质地区和34个气象分区的多重分形特性（如赫斯特指数，谱宽，不对称指数，霍尔德指数）的空间变异性进行了详细的研究。结果表明，在印度北部和东北部的山区中，持久性和复杂性最高。细分规模分析表明，持久性和复杂性的变异性在喀拉拉邦最高，而在维达巴最低。进一步，1976/77年之前和之后太平洋气候变化的降雨序列的多重分形特性评估显示，在转换之后，62％网格中多重分形强度增加。相对于1976/77年，持久性状态的变化在Uttaranchal细分中最高，而从正向不对称变化到负向不对称变化在西北（NW）地区最高。与1977年前期相比，印度半岛的网格点在1977以后期的复杂性，多重分形和持久性方面的降低最少。相对于1976/77年，持久性状态的变化在Uttaranchal细分中最高，而从正向不对称变化到负向不对称变化在西北（NW）地区最高。与1977年前期相比，印度半岛的网格点在1977以后期的复杂性，多重分形和持久性方面的降低最少。相对于1976/77年，持久性状态的变化在Uttaranchal细分中最高，而从正向不对称变化到负向不对称变化在西北（NW）地区最高。与1977年前期相比，印度半岛的网格点在1977以后期的复杂性，多重分形和持久性方面的降低最少。