气候变化领域集成服务门户(CCPortal): High-Resolution Simulations of Submesoscale Processes in the Baltic Sea: The Role of Storm Events

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DOI	10.1029/2020JC016411
	High-Resolution Simulations of Submesoscale Processes in the Baltic Sea: The Role of Storm Events
	Chrysagi E.; Umlauf L.; Holtermann P.; Klingbeil K.; Burchard H.
发表日期	2021
ISSN	21699275
卷号	126 期号:3
英文摘要	Recently discovered, ocean submesoscales have attracted considerable attention due to their ability to change the upper ocean stratification, affect vertical transport, and induce a downscale cascade of energy toward dissipation. In this paper, we highlight the effect of submesoscale fronts and filaments on surface layer properties and dynamics during storm events, extending previous idealized simulations toward real-ocean applications. Here, we use the Baltic Sea as a natural laboratory to study the rich submesoscale activity of this system with the help of realistic high-resolution numerical simulations. These simulations reveal a wealth of cold submesoscale filaments with sharp lateral buoyancy gradients, strong surface convergence, and high vertical velocities. Highly heterogeneous Mixed Layer Depth (MLD) modulations are associated with these features, maintaining locally reduced MLDs even during storm events due to vigorous submesoscale restratification. The interaction of near-surface turbulence and submesoscale restratification results in strong and highly efficient mixing inside the submesoscale fronts. Focusing on a typical filament, it is shown that frontogenesis is associated with the convergent cross-front circulation arising from a turbulent thermal wind balance, consistent with previous studies. We show that the sharp fronts generated by this process may become symmetrically unstable, and show enhanced (modeled) energy dissipation rates that are in good quantitative agreement with existing theoretical estimates. © 2021. The Authors.
英文关键词	Baltic Sea; frontal mixing; GETM; mixed layer restratification; submesoscale filaments; turbulent thermal wind balance
语种	英语
来源期刊	Journal of Geophysical Research: Oceans
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/186412
作者单位	Leibniz Institute for Baltic Sea Research, Warnemünde, Germany
推荐引用方式 GB/T 7714	Chrysagi E.,Umlauf L.,Holtermann P.,et al. High-Resolution Simulations of Submesoscale Processes in the Baltic Sea: The Role of Storm Events[J],2021,126(3).
APA	Chrysagi E.,Umlauf L.,Holtermann P.,Klingbeil K.,&Burchard H..(2021).High-Resolution Simulations of Submesoscale Processes in the Baltic Sea: The Role of Storm Events.Journal of Geophysical Research: Oceans,126(3).
MLA	Chrysagi E.,et al."High-Resolution Simulations of Submesoscale Processes in the Baltic Sea: The Role of Storm Events".Journal of Geophysical Research: Oceans 126.3(2021).