Analysis of spatial and temporal extreme monsoonal rainfall over South Asia using complex networks
Analysis of spatial and temporal extreme monsoonal rainfall over South Asia using complex networks
复制标题
DOI：
10.1007/s00382-011-1156-4
复制
发表时间：
2012-08-01
期刊：
影响因子：
4.6
通讯作者：
Kurths, Juergen
中科院分区：
文献类型：
--
作者：
Malik, Nishant;Bookhagen, Bodo;Kurths, Juergen
我们提出了一个详细的分析，夏季季风降水在印度半岛使用非线性空间相关性。这种分析是采用复杂网络的工具和测量点过程，如降雨的非线性相关性，称为事件同步。这项研究提供了有价值的见解的空间组织，规模和结构的第90和第94百分位降雨事件在印度夏季风（6月至9月）。我们还分析了不同的关键天气大气系统的影响和陡峭的喜马拉雅地形对降雨模式的影响。所提出的方法不仅可以帮助我们在可视化的极端事件降雨场的结构，但也确定了水汽路径和十年尺度的水汽汇在该地区。此外，一个简单的方案，复杂网络的基础上破译的空间复杂性和时间演变的季风降雨模式在过去的60年。
We present a detailed analysis of summer monsoon rainfall over the Indian peninsular using nonlinear spatial correlations. This analysis is carried out employing the tools of complex networks and a measure of nonlinear correlation for point processes such as rainfall, called event synchronization. This study provides valuable insights into the spatial organization, scales, and structure of the 90th and 94th percentile rainfall events during the Indian summer monsoon (June-September). We furthermore analyse the influence of different critical synoptic atmospheric systems and the impact of the steep Himalayan topography on rainfall patterns. The presented method not only helps us in visualising the structure of the extreme-event rainfall fields, but also identifies the water vapor pathways and decadal-scale moisture sinks over the region. Furthermore a simple scheme based on complex networks is presented to decipher the spatial intricacies and temporal evolution of monsoonal rainfall patterns over the last 6 decades.