Τίτλος:
Multifractal Detrended Cross-Correlation Analysis of Global Methane and
Temperature
Γλώσσες Τεκμηρίου:
Αγγλικά
Περίληψη:
Multifractal Detrended Cross-Correlation Analysis (MF-DCCA) was applied
to time series of global methane concentrations and remotely-sensed
temperature anomalies of the global lower and mid-troposphere, with the
purpose of investigating the multifractal characteristics of their
cross-correlated time series and examining their interaction in terms of
nonlinear analysis. The findings revealed the multifractal nature of the
cross-correlated time series and the existence of positive persistence.
It was also found that the cross-correlation in the lower troposphere
displayed more abundant multifractal characteristics when compared to
the mid-troposphere. The source of multifractality in both cases was
found to be mainly the dependence of long-range correlations on
different fluctuation magnitudes. Multifractal Detrended Fluctuation
Analysis (MF-DFA) was also applied to the time series of global methane
and global lower and mid-tropospheric temperature anomalies to
separately study their multifractal properties. From the results, it was
found that the cross-correlated time series exhibit similar multifractal
characteristics to the component time series. This could be another sign
of the dynamic interaction between the two climate variables.
Συγγραφείς:
Tzanis, Chris G.
Koutsogiannis, Ioannis
Philippopoulos, Kostas
and Kalamaras, Nikolaos
Περιοδικό:
GIScience and Remote Sensing
Λέξεις-κλειδιά:
multifractal detrended cross-correlation analysis; methane; temperature;
climate change; climate dynamics
