DOI: 10.1175/JCLI-D-15-0580.1
Scopus记录号: 2-s2.0-84971474760
论文题名: Influence of climate variability on extreme ocean surface wave heights assessed from ERA-interim and ERA-20C
作者: Kumar P. ; Min S.-K. ; Weller E. ; Lee H. ; Wang X.L.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2016
卷: 29, 期: 11 起始页码: 4031
结束页码: 4046
语种: 英语
Scopus关键词: Atmospheric pressure
; Climate change
; Meteorology
; Nickel
; Oceanography
; Sea level
; Surface waves
; Water waves
; Wind
; Climate variability
; ENSO
; Extreme events
; North Atlantic oscillations
; Pacific decadal oscillation
; Variability
; Climatology
; air-sea interaction
; atmospheric circulation
; climatology
; El Nino-Southern Oscillation
; extreme event
; North Atlantic Oscillation
; Pacific Decadal Oscillation
; sea surface
; wave height
; Pacific Ocean
; Pacific Ocean (North)
英文摘要: Extreme ocean surface wave heights significantly affect coastal structures and offshore activities and impact many vulnerable populations of low-lying islands. Therefore, better understanding of ocean wave height variability plays an important role in potentially reducing risk in such regions. In this study, global impacts of natural climate variability such as El Niño-Southern Oscillation (ENSO), North Atlantic Oscillation (NAO), and Pacific decadal oscillation (PDO) on extreme significant wave height (SWH) are analyzed using ERA-Interim (1980-2014) and ECMWF twentieth-century reanalysis (ERA-20C; 1952-2010) datasets for December-February (DJF). The nonstationary generalized extreme value (GEV) analysis is used to determine the influence of natural climate variability on DJF maxima of SWH (Hmax), wind speed (Wmax), and mean sea level pressure gradient amplitude (Gmax). The major ENSO influence on Hmax is found over the northeastern North Pacific (NP), with increases during El Niño and decreases during La Niña, and its counter responses are observed in coastal regions of the western NP, which are consistently observed in both Wmax and Gmax responses. The Hmax response to the PDO occurs over similar regions in the NP as those associated with ENSO but with much weaker amplitude. Composite analysis of different ENSO and PDO phase combinations reveals stronger (weaker) influences when both variability modes are of the same (opposite) phase. Furthermore, significant NAO influence on Hmax, Wmax, and Gmax is observed throughout Icelandic and Azores regions in relation to changes in atmospheric circulation patterns. Overall, the response of extreme SWH to natural climate variability modes is consistent with seasonal mean responses. © 2016 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/49909
Appears in Collections: 气候变化事实与影响
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作者单位: School of Environmental Science and Engineering, Pohang University of Science and Technology, Pohang, Gyeongbuk, South Korea; Department of Applied Sciences, National Institute of Technology Delhi, New Delhi, India; Climate Research Division, Environment and Climate Change Canada, Toronto, ON, Canada
Recommended Citation:
Kumar P.,Min S.-K.,Weller E.,et al. Influence of climate variability on extreme ocean surface wave heights assessed from ERA-interim and ERA-20C[J]. Journal of Climate,2016-01-01,29(11)