气候变化领域集成服务门户(CCPortal): M2 Internal-Tide Generation in STORMTIDE2

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DOI	10.1029/2019JC015453
	M2 Internal-Tide Generation in STORMTIDE2
	Li Z.; von Storch J.-S.
发表日期	2020
ISSN	21699275
卷号	125 期号:8
英文摘要	Internal-tide generation has been quantified using both pressure work and energy conversion. When calculating the pressure work from simulated or observed data, the internal-tide pressure has to be decomposed from the full pressure, for which various options exist. We show that the conversion, that has to be derived from the depth-integrated energy equations, contains the work done by both the form drag at the bottom and that at the surface, with the latter being about 1% of the former. For calculating the pressure work, the internal-tide pressure identified as the deviation from the depth-averaged pressure perturbation has to be used. We analyzed the work done by the bottom form drag in STORMTIDE2, a concurrent simulation of circulations and tides. As expected, the identified internal-tide pressure reveals the characteristic pressure drop from the windward to the leeward side of an obstacle. The M2 internal-tide generation in STORMTIDE2 is more strongly controlled by the barotropic tide than by the topographic slope, partly because the tidal velocity can change up to one order of magnitude from the top to the foot of a high ridge within a short distance, a feature only produced by a high-resolution model. Consequently, the intense generation maps the immediate proximities of the summits of high ridges, making the global generation to be strongest near 1,200 m and decreasing drastically below 3,000 m. The depth structure of the generation differs in different basins, which could impact differently on circulations in different basins. © 2020. The Authors.
英文关键词	barotropic tidal velocity; conversion rate; high-resolution ocean modelling; internal-tide generation; internal-tide pressure; work done by a form drag
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/186725
作者单位	Max Planck Institute for Meteorology, Hamburg, Germany; College of Oceanography, Hohai University, Nanjing, China; Center for Earth System Research and Sustainability (CEN), Universitt Hamburg, Hamburg, Germany
推荐引用方式 GB/T 7714	Li Z.,von Storch J.-S.. M2 Internal-Tide Generation in STORMTIDE2[J],2020,125(8).
APA	Li Z.,&von Storch J.-S..(2020).M2 Internal-Tide Generation in STORMTIDE2.Journal of Geophysical Research: Oceans,125(8).
MLA	Li Z.,et al."M2 Internal-Tide Generation in STORMTIDE2".Journal of Geophysical Research: Oceans 125.8(2020).