DOI: 10.1175/JCLI-D-18-0520.1
Scopus记录号: 2-s2.0-85058786282
论文题名: Global wind speed and wave height extremes derived from long-duration satellite records
作者: Takbash A. ; Young I.R. ; Breivik Ø.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2019
卷: 32, 期: 1 起始页码: 109
结束页码: 126
语种: 英语
Scopus关键词: Aneroid altimeters
; Meteorological instruments
; Radiometers
; Speed
; Storms
; Value engineering
; Water waves
; Extreme value analysis
; Extreme wind speed
; Fine-scale structures
; Heavy rain event
; Peaks over threshold
; Significant wave height
; Tropical cyclone activity
; Validation data
; Wind
; data set
; extreme event
; numerical model
; radiometer
; satellite altimetry
; spatial distribution
; wave height
; wind velocity
英文摘要: The application of extreme-value analysis to long-duration (30 year) global altimeter and radiometer datasets is considered. In contrast to previous extreme-value analyses of satellite data, the dataset is sufficiently long to enable a peaks over threshold analysis to be undertaken. When applied to altimeter data for wind speed and significant wave height, this analysis produces values consistent with buoy validation data and previous numerical model reanalysis datasets. The spatial distributions produced are also consistent with the model reanalysis data. However, the altimeter data shows much greater finescale structure for wind speed, which is consistent with known tropical cyclone activity. The greater data density provided by radiometer measurements offers the potential to address altimeter undersampling. However, issues associated with the radiometer's inability to measure wind speed in heavy rain events appears to create an unacceptable ''fair weather'' bias at extreme wind speeds. This renders the radiometer data of wind speed largely unusable for the investigation of wind speed extremes. The study also clearly demonstrates the limitations of the initial distribution method for extreme-value analysis, which is heavily biased by mean conditions. © 2018 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/117273
Appears in Collections: 气候变化与战略
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Recommended Citation:
Takbash A.,Young I.R.,Breivik Ø.. Global wind speed and wave height extremes derived from long-duration satellite records[J]. Journal of Climate,2019-01-01,32(1)