Spatiotemporal variability of multifractal properties of fineresolution daily gridded rainfall fields over India
Article
Article Title | Spatiotemporal variability of multifractal properties of fineresolution daily gridded rainfall fields over India |
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ERA Journal ID | 1986 |
Article Category | Article |
Authors | Sankaran, Adarsh, Chavan, Sagar Rohidas, Ali, Mumtaz, Devarajan, Archana Devarajan, Dharan, Drisya Sasi and Khan, Muhammad Ismail |
Journal Title | Natural Hazards |
Journal Citation | 106 (3), pp. 1951-1979 |
Number of Pages | 29 |
Year | Apr 2021 |
Publisher | Springer |
Place of Publication | Switzerland |
ISSN | 0921-030X |
1573-0840 | |
Digital Object Identifier (DOI) | https://doi.org/10.1007/s11069-021-04523-0 |
Web Address (URL) | https://link.springer.com/article/10.1007/s11069-021-04523-0 |
Abstract | This study investigated the multifractal characteristics of fine resolution (0.25ox0.25°) 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. |
Keywords | Multifractal; Rainfall; Correlation; Climate shift; Persistence; Complexity |
ANZSRC Field of Research 2020 | 499999. Other mathematical sciences not elsewhere classified |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | TKM College of Engineering, India |
Indian Institute of Technology, India | |
Deakin University | |
University of Queensland |
https://research.usq.edu.au/item/w28y8/spatiotemporal-variability-of-multifractal-properties-of-fineresolution-daily-gridded-rainfall-fields-over-india
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