Rainfall pattern analysis in 24 East Asian megacities using a complex network

[摘要] Concurrent floods in multiple locations pose systemicrisks to the interconnected economy in East Asia via supply chain disruptions.Despite these significant economic impacts, understanding of theinterconnection between rainfall patterns in the region is still currently limited.Here, we analyzed the spatial dependence of the rainfall patterns of 24megacities in the region using complex analysis theory and discussed thetechnique's applicability. Each city and rainfall similarity were representedby a node and a link, respectively. Vital-node identification and clusteringanalysis were conducted using adjacency information entropy andmultiresolution community detection. The results of vital-node identificationanalysis show that high-ranking nodes are cities that are located near main vaporproviders in East Asia. Using multiresolution community detection, thegroups were clustered to reflect the spatial characteristics of the climate.In addition, the climate links between each group were identified using cross-mutual information considering the delay time for each group. Wefound a strong bond between Northeast China and the southern IndochinesePeninsula and verified that the links between each group originatedfrom the summer climate characteristics of East Asia. The results of thestudy show that complex network analysis could be a valuable method foranalyzing the spatial relationships between climate factors.

[学科分类] 妇产科学