Home   About the Journal   中文界面
CLASSIFYING WESTERN NORTH PACIFIC TROPICAL CYCLONES BY PHYSICAL INDEX SYSTEM?
  Revised:March 29, 2018
KeyWords:tropical cyclone  physical index  K-means clustering  Nash-Sutcliffe efficiency  inter-cluster divergence  intra-cluster cohesiveness  power dissipation index
Fund:
Author NameAffiliationE-mail
YAN Dong-yi State Key Laboratory of Hydraulics Engineering Simulation and Safety, Tianjin University, Tianjin 300072 China  
XU Kui  jackykui@126.com 
MA Chao   
MA Man-cang   
Hits: 332
Download times: 
Abstract:
      The classification of tropical cyclones (TCs) is significant to obtain their temporal and spatial variation characteristics in the context of dramatic-changing global climate. A new TCs clustering method by using K-means clustering algorithm with nine physical indexes is proposed in the paper. Each TC is quantified into an 11-dimensional vector concerning trajectory attributes, time attributes and power attributes. Two recurving clusters (cluster A and E) and three straight-moving clusters (cluster B, C and D) are categorized from the TC best-track dataset of the western North Pacific (WNP) over the period of 1949-2013, and TCs’ properties have been analyzed and compared in different aspects. The calculation results of coefficient variation (CV) and Nash-Sutcliffe efficiency (NSE) reveal a high level of intra-cluster cohesiveness and inter-cluster divergence, which means that the physical index system could serve as a feasible method of TCs classification. The clusters are then analyzed in terms of trajectory, lifespan, seasonality, trend, intensity and Power Dissipation Index (PDI). The five classified clusters show distinct features in TCs’ temporal and spatial development discipline. Moreover, each cluster has its individual motion pattern, variation trend, influence region and impact degree.
DOI:10.16555/j.1006-8775.2018.02.003
View Full Text  View/Add Comment  Download reader
      Copyright:Journal of Tropical Meteorology Editorial Office
Address:6 Fu Jin Road Guangzhou   Postcode:510080   Tel:020-87675987   Fax:020-87675987
Technical support: Beijing E-Tiller Co.,Ltd.