气候变化领域集成服务门户(CCPortal): Mixing Driven by Breaking Nonlinear Internal Waves

CCPortal

DOI	10.1029/2020GL089591
	Mixing Driven by Breaking Nonlinear Internal Waves
	Jones N.L.; Ivey G.N.; Rayson M.D.; Kelly S.M.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:19
英文摘要	Non-linear internal waves (NLIW) are important to processes such as heat transfer, nutrient replenishment and sediment transport on continental shelves. Our unique field observations of shoaling NLIW of elevation revealed a variety of different wave shapes, varying from relatively symmetric waves, to waves with either steepened leading- or trailing-faces; many had evidence of trapped cores. The wave shape was related to the position of maximum density overturns and diapycnal mixing. We observed both shear (where sheared currents overcome the stabilizing effects of stratification) and convective (where the local velocity exceeds the wave propagation speed) instabilities. The elevated diapycnal mixing (>10−3 m2s−1) and heat flux (>500 Wm−2) were predominantly local to the NLIW of elevation packets, and were transported onshore 10s kilometers with the wave packets. We demonstrate that wave steepness may be a useful bulk property for the parameterization of wave-averaged diapycnal heat flux. ©2020. The Authors.
英文关键词	Heat flux; Heat transfer; Mixing; Oceanography; Sediment transport; Wave propagation; Bulk properties; Continental shelves; Diapycnal mixing; Field observations; Nonlinear internal wave; Propagation speed; Sheared currents; Stabilizing effects; Shear flow; continental shelf; heat flux; heat transfer; internal wave; sediment transport; wave propagation
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169658
作者单位	Oceans Graduate School and Oceans Institute, University of Western Australia, Crawley, WA, Australia; Large Lakes Observatory and Department of Physics, University of Minnesota Duluth, Duluth, MN, United States
推荐引用方式 GB/T 7714	Jones N.L.,Ivey G.N.,Rayson M.D.,et al. Mixing Driven by Breaking Nonlinear Internal Waves[J],2020,47(19).
APA	Jones N.L.,Ivey G.N.,Rayson M.D.,&Kelly S.M..(2020).Mixing Driven by Breaking Nonlinear Internal Waves.Geophysical Research Letters,47(19).
MLA	Jones N.L.,et al."Mixing Driven by Breaking Nonlinear Internal Waves".Geophysical Research Letters 47.19(2020).