DOI: 10.1007/s00382-017-3636-7
Scopus记录号: 2-s2.0-85017004224
论文题名: Is the poleward migration of tropical cyclone maximum intensity associated with a poleward migration of tropical cyclone genesis?
作者: Daloz A.S. ; Camargo S.J.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2018
卷: 50, 期: 2018-01-02 起始页码: 705
结束页码: 715
语种: 英语
英文关键词: Observations
; Poleward migration
; Tropical cyclone genesis
; Tropical cyclone genesis index
Scopus关键词: environmental factor
; index method
; latitude
; observational method
; ocean basin
; tropical cyclone
; Pacific Ocean
英文摘要: A recent study showed that the global average latitude where tropical cyclones achieve their lifetime-maximum intensity has been migrating poleward at a rate of about one-half degree of latitude per decade over the last 30 years in each hemisphere. However, it does not answer a critical question: is the poleward migration of tropical cyclone lifetime-maximum intensity associated with a poleward migration of tropical cyclone genesis? In this study we will examine this question. First we analyze changes in the environmental variables associated with tropical cyclone genesis, namely entropy deficit, potential intensity, vertical wind shear, vorticity, skin temperature and specific humidity at 500 hPa in reanalysis datasets between 1980 and 2013. Then, a selection of these variables is combined into two tropical cyclone genesis indices that empirically relate tropical cyclone genesis to large-scale variables. We find a shift toward greater (smaller) average potential number of genesis at higher (lower) latitudes over most regions of the Pacific Ocean, which is consistent with a migration of tropical cyclone genesis towards higher latitudes. We then examine the global best track archive and find coherent and significant poleward shifts in mean genesis position over the Pacific Ocean basins. © 2017, Springer-Verlag Berlin Heidelberg. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/109481
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
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作者单位: Space and Science Engineering Center, University of Wisconsin-Madison, 1225 West Dayton Street, Madison, WI 53706, United States; Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY, United States
Recommended Citation:
Daloz A.S.,Camargo S.J.. Is the poleward migration of tropical cyclone maximum intensity associated with a poleward migration of tropical cyclone genesis?[J]. Climate Dynamics,2018-01-01,50(2018-01-02)