DOI: 10.1175/JCLI-D-17-0746.1
Scopus记录号: 2-s2.0-85048195720
论文题名: A new method to objectively classify extratropical cyclones for climate studies: Testing in the Southwest Pacific region
作者: Catto J.L.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2018
卷: 31, 期: 12 起始页码: 4683
结束页码: 4704
语种: 英语
英文关键词: Climate classification/regimes
; Extratropical cyclones
; Synoptic-scale processes
Scopus关键词: Fighter aircraft
; Storms
; Tropics
; Climate classification/regimes
; Development mechanisms
; Extratropical cyclones
; K - means clustering
; Manual classification
; Spatial and temporal variability
; Synoptic-scale process
; Temporal characteristics
; Climate models
; climate classification
; climate modeling
; cyclogenesis
; extratropical cyclone
; spatiotemporal analysis
; synoptic meteorology
; troposphere
; Pacific Ocean
; Pacific Ocean (Southwest)
英文摘要: Extratropical cyclones can vary widely in their configuration during cyclogenesis, development mechanisms, spatial and temporal characteristics, and impacts. An automated method to classify extratropical cyclones identified in ERA-Interim data from 1979 to 2010 in the Australia and New Zealand region has been developed. The technique uses K-means clustering on two upper-tropospheric flow fields at the time of cyclogenesis and identifies four distinct clusters. Composites of these clusters are investigated, along with their life cycles and their spatial and temporal variability. The four clusters are similar to a previous manual classification. Cluster 1 develops in the equatorward entrance region of the subtropical jet, clusters 2 and 4 develop in the poleward exit region of the subtropical jet but with different relative positions of the upper-level trough and jet streak, and cluster 3 resembles secondary cyclogenesis on a preexisting front far poleward of the subtropical jet. The clusters have different impacts in terms of their precipitation (cluster 1 has the highest average precipitation), different seasonal cycles, and different preferred genesis locations. Features of the composite cyclones resemble extratropical cyclones from other regions, indicating the utility of the method over larger regions. The method has been developed to be easily applied to climate model output in order to evaluate the ability of models to represent the full range of observed extratropical cyclones. © 2018 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/111534
Appears in Collections: 气候减缓与适应
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作者单位: Monash University, Melbourne, VIC, Australia; University of Exeter, Exeter, United Kingdom
Recommended Citation:
Catto J.L.. A new method to objectively classify extratropical cyclones for climate studies: Testing in the Southwest Pacific region[J]. Journal of Climate,2018-01-01,31(12)