DOI: 10.1029/2017JC013584
Scopus记录号: 2-s2.0-85046160040
论文题名: Generation of Near-Inertial Currents on the Mid-Atlantic Bight by Hurricane Arthur (2014)
作者: Zhang F. ; Li M. ; Miles T.
刊名: Journal of Geophysical Research: Oceans
ISSN: 21699275
出版年: 2018
卷: 123, 期: 4 起始页码: 3100
结束页码: 3116
语种: 英语
英文关键词: continental shelf
; energy budget
; hurricane
; mixing
; near-inertial currents
; shear
英文摘要: Near-inertial currents (NICs) were observed on the Mid-Atlantic Bight (MAB) during the passage of Hurricane Arthur (2014). High-frequency radars showed that the surface currents were weak near the coast but increased in the offshore direction. The NICs were damped out in 3–4 days in the southern MAB but persisted for up to 10 days in the northern MAB. A Slocum glider deployed on the shelf recorded two-layer baroclinic currents oscillating at the inertial frequency. A numerical model was developed to interpret the observed spatial and temporal variabilities of the NICs and their vertical modal structure. Energy budget analysis showed that most of the differences in the NICs between the shelf and the deep ocean were determined by the spatial variations in wind energy input. In the southern MAB, energy dissipation quickly balanced the wind energy input, causing a rapid damping of the NICs. In the northern MAB, however, the dissipation lagged the wind energy input such that the NICs persisted. The model further showed that mode-1 waves dominated throughout the MAB shelf and accounted for over 70% of the current variability in the NICs. Rotary spectrum analyses revealed that the NICs were the largest component of the total kinetic energy except in the southern MAB and the inner shelf regions with strong tides. The NICs were also a major contributor to the shear spectrum over an extensive area of the MAB shelf and thus may play an important role in producing turbulent mixing and cooling of the surface mixed layer. © 2018. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114191
Appears in Collections: 气候减缓与适应
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作者单位: Horn Point Lab, University of Maryland Center for Environmental Science, Cambridge, MD, United States; Department of Marine and Coastal Sciences, Center for Ocean Observing Leadership, Rutgers University, New Brunswick, NJ, United States
Recommended Citation:
Zhang F.,Li M.,Miles T.. Generation of Near-Inertial Currents on the Mid-Atlantic Bight by Hurricane Arthur (2014)[J]. Journal of Geophysical Research: Oceans,2018-01-01,123(4)