Kurths, Jurgen, Agarwal, Ankit, Shukla, Roopam, Marwan, Norbert, Rathinasamy, Maheswaran, Caesar, Levke, Krishnan, Raghavan and Merz, Bruno (2019) Unravelling the spatial diversity of Indian precipitation teleconnections via a non-linear multi-scale approach. Nonlinear Processes in Geophysics, 26. pp. 251-266. ISSN 1023-5809
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Abstract
A better understanding of precipitation dynamics
in the Indian subcontinent is required since India’s society
depends heavily on reliable monsoon forecasts. We introduce
a non-linear, multiscale approach, based on wavelets
and event synchronization, for unravelling teleconnection influences
on precipitation. We consider those climate patterns
with the highest relevance for Indian precipitation.
Our results suggest significant influences which are not
well captured by only the wavelet coherence analysis, the
state-of-the-art method in understanding linkages at multiple
timescales.We find substantial variation across India and
across timescales. In particular, El Niño–Southern Oscillation
(ENSO) and the Indian Ocean Dipole (IOD) mainly
influence precipitation in the south-east at interannual and
decadal scales, respectively, whereas the North Atlantic Oscillation
(NAO) has a strong connection to precipitation, particularly
in the northern regions. The effect of the Pacific
Decadal Oscillation (PDO) stretches across the whole country,
whereas the Atlantic Multidecadal Oscillation (AMO)
influences precipitation particularly in the central arid and
semi-arid regions. The proposed method provides a powerful
approach for capturing the dynamics of precipitation and,
hence, helps improve precipitation forecasting.
Item Type: | Article |
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Additional Information: | © Author(s) 2019. This work is distributed under the Creative Commons Attribution 4.0 License (https://creativecommons.org/licenses/by/4.0/). Cite as: Kurths, J., Agarwal, A., Shukla, R., Marwan, N., Rathinasamy, M., Caesar, L., Krishnan, R., and Merz, B.: Unravelling the spatial diversity of Indian precipitation teleconnections via a non-linear multi-scale approach, Nonlin. Processes Geophys., 26, 251–266, https://doi.org/10.5194/npg-26-251-2019, 2019. Funding: This research has been supported by the Deutsche Forschungsgemeinschaft (grant no. 2043/1). |
Keywords: | Unravelling; spatial; diversity; Indian precipitation; teleconnections; non-linear; multi-scale; |
Academic Unit: | Faculty of Social Sciences > Geography Faculty of Social Sciences > Research Institutes > Irish Climate Analysis and Research Units, ICARUS |
Item ID: | 13721 |
Identification Number: | 10.5194/npg-26-251-2019 |
Depositing User: | Levke Caesar |
Date Deposited: | 04 Dec 2020 15:58 |
Journal or Publication Title: | Nonlinear Processes in Geophysics |
Publisher: | American Geophysical Union |
Refereed: | Yes |
Funders: | Deutsche Forschungsgemeinschaft |
Related URLs: | |
URI: | https://mu.eprints-hosting.org/id/eprint/13721 |
Use Licence: | This item is available under a Creative Commons Attribution Non Commercial Share Alike Licence (CC BY-NC-SA). Details of this licence are available here |
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