14 Jul 2021
14 Jul 2021
Status: a revised version of this preprint is currently under review for the journal HESS.

Anaylsis of rainfall relationships in East Asia using a complex network

Kyunghun Kim1, Jaewon Jung2, Hung Soo Kim1, Haraguchi Masahiko3, and Soojun Kim1 Kyunghun Kim et al.
  • 1Department of Civil engineering, INHA University, Incheon, 22212, Rep. of Korea
  • 2Center for Hydrology and Ecology, Incheon, 22212, Rep. of Korea
  • 3Research Institute for Humanity and Nature, Kyoto, Japan

Abstract. Concurrent floods in multiple locations pose systemic risks to the interconnected economy in East Asia through supply chains. Despite the significant economic impacts, however, the understanding of the interconnection between rainfall patterns in the region is yet limited. Here, we analyzed spatial dependence in rainfall patterns of the 24 mega-cities in the region by means of complex analysis theory and discussed the technique’s its applicability. Each city and correlation coefficient was represented by a node and a link, respectively. Vital node identification and clustering analysis were conducted using adjacency information entropy and multi-community detection. The groups were clustered to reflect the spatial characteristics of climate. In addition, the climate links between each group were identified through the cross-mutual information considering the delay time for each group. It was concluded that the complex network analysis can be a useful method for analyzing spatial relationship between climate factors.

Kyunghun Kim et al.

Status: final response (author comments only)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on hess-2021-343', Anonymous Referee #1, 10 Aug 2021
    • AC1: 'Reply on RC1', Kyunghun Kim, 20 Aug 2021
  • RC2: 'Comment on hess-2021-343', Geoff Pegram, 17 Aug 2021
    • AC2: 'Reply on RC2', Kyunghun Kim, 20 Aug 2021

Kyunghun Kim et al.

Kyunghun Kim et al.


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Short summary
This study applied a new methodology, Complex network, instead of classical methods for checking relationships of rainfall events in large cities in East Asia. The relationships showed that western China and Southeast Asia had a lot of influence on each other. Also, it is confirmed that the relationships arose from the effect of East Asian monsoon. It is expected that Complex network can be applied as a useful methodology to analyze the concurrent relationship of extreme rainfall events.