DOI: 10.1002/2016GL067728
论文题名: Different controls of tropical cyclone activity in the Eastern Pacific for two types of El Niño
作者: Boucharel J. ; Jin F.-F. ; Lin I.I. ; Huang H.-C. ; England M.H.
刊名: Geophysical Research Letters
ISSN: 0094-9371
EISSN: 1944-9102
出版年: 2016
卷: 43, 期: 4 起始页码: 1679
结束页码: 1686
语种: 英语
英文关键词: Eastern Pacific
; El Niño types
; ENSO
; ocean heat content
; tropical cyclone
Scopus关键词: Atmospheric pressure
; Climatology
; Humidity control
; Hurricanes
; Nickel
; Storms
; Tropics
; Atmospheric circulation
; Atmospheric conditions
; Eastern pacific
; ENSO
; Ocean heat content
; Region of influences
; Tropical cyclone
; Tropical cyclone activity
; Atmospheric humidity
; atmospheric circulation
; climate change
; El Nino-Southern Oscillation
; heat budget
; hurricane event
; oceanic circulation
; relative humidity
; spatial analysis
; tropical cyclone
; wind shear
; Pacific Ocean
英文摘要: The El Niño-Southern Oscillation (ENSO) is known to have different modes of expression, characterized by different dynamics and spatial anomalies patterns: the Eastern Pacific (EP) and Central Pacific (CP) El Niño. The main region of influence of the former is located in the Eastern Pacific, while CP events have a stronger signature of ocean/climate anomalies in the Central West Pacific. This leads to distinctive oceanic and atmospheric signatures that likely have different influences on tropical cyclone (TC) activity in the Eastern Pacific, the second most active region in the world. In this study we investigate the respective role of oceanic and atmospheric conditions on TC formation and intensification in the Eastern Pacific associated with these two flavors of ENSO. We find that the oceanic control, through meridional redistribution of subsurface heat, is the main driver of TC activity during the hurricane season following EP events. In contrast, atmospheric conditions tend to be destructive to TC intensification after those events. The altered atmospheric circulation, in particular the reduction of vertical wind shear and the increase in relative humidity, tends to be more influential in controlling TC activity post CP events. However, unlike for subsurface heat, these changes in atmospheric conditions are not statistically distinct between these two ENSO flavors - although they are consistent across all atmospheric data sets tested. Overall, unlike after EP El Niño events, the hurricane season activity following a CP event is not significantly different from neutral or even La Niña years. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84976215526&doi=10.1002%2f2016GL067728&partnerID=40&md5=9555437c9c068f5ca1bddb387d278c8d
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/10334
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: ARC Centre of Excellence for Climate System Science, University of New South Wales, Kensington, NSW, Australia
Recommended Citation:
Boucharel J.,Jin F.-F.,Lin I.I.,et al. Different controls of tropical cyclone activity in the Eastern Pacific for two types of El Niño[J]. Geophysical Research Letters,2016-01-01,43(4).