Journal cover Journal topic
Nonlinear Processes in Geophysics An interactive open-access journal of the European Geosciences Union
Journal topic

Journal metrics

IF value: 1.558
IF1.558
IF 5-year value: 1.475
IF 5-year
1.475
CiteScore value: 2.8
CiteScore
2.8
SNIP value: 0.921
SNIP0.921
IPP value: 1.56
IPP1.56
SJR value: 0.571
SJR0.571
Scimago H <br class='widget-line-break'>index value: 55
Scimago H
index
55
h5-index value: 22
h5-index22
Volume 17, issue 5
Nonlin. Processes Geophys., 17, 371–381, 2010
https://doi.org/10.5194/npg-17-371-2010
© Author(s) 2010. This work is distributed under
the Creative Commons Attribution 3.0 License.
Nonlin. Processes Geophys., 17, 371–381, 2010
https://doi.org/10.5194/npg-17-371-2010
© Author(s) 2010. This work is distributed under
the Creative Commons Attribution 3.0 License.

  01 Sep 2010

01 Sep 2010

Spatial structures and directionalities in Monsoonal precipitation over South Asia

N. Malik1,2, N. Marwan1, and J. Kurths1,3 N. Malik et al.
  • 1Potsdam Institute for Climate Impact Research, P.O. Box 601203, 14412, Potsdam, Germany
  • 2Institute of Physics, University of Potsdam, Karl-Liebknecht-Str. 24/25, 14476 Potsdam-Golm, Germany
  • 3Department of Physics, Humboldt University, Newtonstr. 15, 12489 Berlin, Germany

Abstract. Precipitation during the monsoon season over the Indian subcontinent occurs in form of enormously complex spatiotemporal patterns due to the underlying dynamics of atmospheric circulation and varying topography. Employing methods from nonlinear time series analysis, we study spatial structures of the rainfall field during the summer monsoon and identify principle regions where the dynamics of monsoonal rainfall is more coherent or homogenous. Moreover, we estimate the time delay patterns of rain events. Here we present an analysis of two separate high resolution gridded data sets of daily rainfall covering the Indian subcontinent. Using the method of event synchronization (ES), we estimate regions where heavy rain events during monsoon happen in some lag synchronised form. Further using the delay behaviour of rainfall events, we estimate the directionalities related to the progress of such type of rainfall events. The Active (break) phase of a monsoon is characterised by an increase(decrease) of rainfall over certain regions of the Indian subcontinent. We show that our method is able to identify regions of such coherent rainfall activity.

Publications Copernicus
Download
Citation