Air-Sea Momentum Fluxes during Tropical Cyclone Olwyn

doi:10.1175/JPO-D-18-0261.1

	Air-Sea Momentum Fluxes during Tropical Cyclone Olwyn
	Voermans, Joey J.1; Rapizo, Henrique 2; Ma, Hongyu 1,3; Qiao, Fangli 3; Babanin, Alexander V.1,4
刊名	JOURNAL OF PHYSICAL OCEANOGRAPHY
	2019-06
卷号	49 期号:6 页码:1369-1379
关键词	Momentum Wind stress Tropical cyclones Air-sea interaction In situ oceanic observations
ISSN号	0022-3670
DOI	10.1175/JPO-D-18-0261.1
英文摘要	Observations of wind stress during extreme winds are required to improve predictability of tropical cyclone track and intensity. A common method to approximate the wind stress is by measuring the turbulent momentum flux directly. However, during high wind speeds, wave heights are typically of the same order of magnitude as instrument heights, and thus, turbulent momentum flux observations alone are insufficient to estimate wind stresses in tropical cyclones, as wave-induced stresses contribute to the wind stress at the height of measurements. In this study, wind stress observations during the near passage of Tropical Cyclone Olwyn are presented through measurements of the mean wind speed and turbulent momentum flux at 8.8 and 14.8 m above the ocean surface. The high sampling frequency of the water surface displacement (up to 2.5 Hz) allowed for estimations of the wave-induced stresses by parameterizing the wave input source function. During high wind speeds, our results show that the discrepancy between the wind stress and the turbulent stress can be attributed to the wave-induced stress. It is observed that for > 1 m s(-1), the wave-induced stress contributes to 63% and 47% of the wind stress at 8.8 and 14.8 m above the ocean surface, respectively. Thus, measurements of wind stresses based on turbulent stresses alone underestimate wind stresses during high wind speed conditions. We show that this discrepancy can be solved for through a simple predictive model of the wave-induced stress using only observations of the turbulent stress and significant wave height.
资助项目	ARC[DP170101328]
WOS关键词	DIRECTIONAL SPECTRA ; WIND STRESS ; SURFACE ; WAVES ; COEFFICIENTS ; DRAG ; PARAMETERIZATION ; EXCHANGE
WOS研究方向	Oceanography
语种	英语
出版者	AMER METEOROLOGICAL SOC
WOS记录号	WOS:000468844200001
内容类型	期刊论文
源URL	[http://ir.fio.com.cn:8080/handle/2SI8HI0U/24687]
专题	自然资源部第一海洋研究所
通讯作者	Voermans, Joey J.
作者单位	1.Univ Melbourne, Dept Infrastruct Engn, Melbourne, Vic, Australia 2.MetOcean Solut, Raglan, New Zealand 3.Minist Nat Resources, Inst Oceanog 1, Qingdao, Shandong, Peoples R China 4.Qingdao Natl Lab Marine Sci & Technol, Lab Reg Oceanog & Numer Modeling, Qingdao, Shandong, Peoples R China
推荐引用方式 GB/T 7714	Voermans, Joey J.,Rapizo, Henrique,Ma, Hongyu,et al. Air-Sea Momentum Fluxes during Tropical Cyclone Olwyn[J]. JOURNAL OF PHYSICAL OCEANOGRAPHY,2019,49(6):1369-1379.
APA	Voermans, Joey J.,Rapizo, Henrique,Ma, Hongyu,Qiao, Fangli,&Babanin, Alexander V..(2019).Air-Sea Momentum Fluxes during Tropical Cyclone Olwyn.JOURNAL OF PHYSICAL OCEANOGRAPHY,49(6),1369-1379.
MLA	Voermans, Joey J.,et al."Air-Sea Momentum Fluxes during Tropical Cyclone Olwyn".JOURNAL OF PHYSICAL OCEANOGRAPHY 49.6(2019):1369-1379.