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Comparative multifractal analysis of methane gas concentration time series in India and regions within India

journal contribution
posted on 02.08.2022, 16:13 authored by Gopa Bhoumik, Robert Parker, Hartmut Boesch
In the present study GOSAT CH4 has been used to analyze the methane gas concentration in India over the eight years from 2010 to 2017. The data have been analyzed using the multifractal detrended fluctuation analysis technique. Two different geographical regions within India have been selected and CH4 data for those regions are also analyzed. The generalized Hurst exponents for India and the two regions are 1.27, 0.74 and 0.91, which are significantly high from their shuffled data counterparts i.e. 0.50, 0.51 and 0.51 respectively. This finding reveals that methane gas concentration over time show multifractal nature which in turn establishes the presence of long-range temporal correlations in the data. The width of the Multifractal spectrum for India and the two regions are found to be 0.76, 1.38 and 1.01 respectively. This result shows that strength of correlation is different for the two regions selected, which we suggest may be due to the different methane emission process of the considered regions. Comparison of the results with that of shuffled data signify that the correlation is purely due to the methane production dynamics and not a result of mere statistics.

History

Author affiliation

School of Physics and Astronomy, University of Leicester

Version

AM (Accepted Manuscript)

Published in

PROCEEDINGS OF THE INDIAN NATIONAL SCIENCE ACADEMY

Volume

88

Issue

2

Publisher

INDIAN NAT SCI ACAD

issn

0370-0046

eissn

2454-9983

Acceptance date

21/04/2022

Copyright date

2022

Available date

02/05/2023

Language

English