气候变化领域集成服务门户(CCPortal): Ocean Gyres Driven by Surface Buoyancy Forcing

CCPortal

DOI	10.1029/2020GL088539
	Ocean Gyres Driven by Surface Buoyancy Forcing
	Hogg A.M.; Gayen B.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:16
英文摘要	Midlatitude gyres in the ocean are large-scale horizontal circulations that are intensified on the western boundary of the ocean, giving rise to currents such as the Gulf Stream. The physical mechanism underlying gyres is widely recognized to involve the curl of the wind stress, which injects potential vorticity into the upper ocean. However, model results have highlighted the role of surface buoyancy fluxes (principally heating and cooling of the ocean surface) in driving circulation and enhancing gyre variability. Here we present two numerical simulations—one in the fully turbulent regime and the second an eddy-permitting ocean model—which show that gyre-like circulation can be driven by surface buoyancy fluxes alone. We explore this phenomenon through a combination of modeling and linear theory to highlight that the transport of ocean gyres depends upon surface buoyancy fluxes as well as wind stress. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Buoyancy; Wind stress; Buoyancy forcing; Heating and cooling; Ocean surfaces; Physical mechanism; Potential vorticity; Surface buoyancy flux; Turbulent regime; Western boundary; Ocean currents; buoyancy forcing; cooling; gyre; heating; numerical model; oceanic current; potential vorticity; turbulent flow; upper ocean; Atlantic Ocean; Gulf Stream
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/169910
作者单位	Research School of Earth Sciences, Australian National University, Canberra, ACT, Australia; ARC Centre of Excellence for Climate Extremes, Australian National University, Canberra, ACT, Australia; Department of Mechanical Engineering, University of Melbourne, Parkville, VIC, Australia
推荐引用方式 GB/T 7714	Hogg A.M.,Gayen B.. Ocean Gyres Driven by Surface Buoyancy Forcing[J],2020,47(16).
APA	Hogg A.M.,&Gayen B..(2020).Ocean Gyres Driven by Surface Buoyancy Forcing.Geophysical Research Letters,47(16).
MLA	Hogg A.M.,et al."Ocean Gyres Driven by Surface Buoyancy Forcing".Geophysical Research Letters 47.16(2020).