TY  - JOUR
A1  - Kurths, Jürgen
A1  - Agarwal, Ankit
A1  - Shukla, Roopam
A1  - Marwan, Norbert
A1  - Maheswaran, Rathinasamy
A1  - Caesar, Levke
A1  - Krishnan, Raghavan
A1  - Merz, Bruno
T1  - Unravelling the spatial diversity of Indian precipitation teleconnections via a non-linear multi-scale approach
JF  - Nonlinear processes in geophysics
N2  - 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.
Y1  - 2019
U6  - https://doi.org/10.5194/npg-26-251-2019
SN  - 1023-5809
SN  - 1607-7946
VL  - 26
IS  - 3
SP  - 251
EP  - 266
PB  - Copernicus
CY  - Göttingen
ER  -