气候变化领域集成服务门户(CCPortal): Horizontal Pressure Gradient Parameterization for One-Dimensional Lake Models

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DOI	10.1029/2019MS001906
	Horizontal Pressure Gradient Parameterization for One-Dimensional Lake Models
	Stepanenko V.M.; Valerio G.; Pilotti M.
发表日期	2020
ISSN	19422466
卷号	12 期号:2
英文摘要	This work presents a new method for closure of horizontally averaged 1-D thermohydrodynamic equations in an enclosed reservoir by parameterizing the horizontal pressure gradient usually omitted in 1-D lake models. Horizontal pressure gradient is computed using an auxiliary multilayer model where horizontal structure of speed and pressure is given by 1-st Fourier mode. A major effect of new parameterization in 1-D lake model is the emergence of explicitly reproduced H1 seiche modes. The parameterization is implemented in the LAKE model, with minor (2–4%) extra computational cost imposed. The model is applied to Lake Iseo (Italy), and calculated temperature series are compared to measured ones in upper, middle, and deep portions of metalimnion. The amplitude of seiche-induced temperature oscillations well matched the observed amplitude by tuning the bottom friction coefficient only. The synoptic variability of thermocline vertical displacement caused by wind events is well reproduced by the model. The dominant peak of quasi-diurnal period in temperature power spectrum was captured in simulations as well. Using the new parameterization of horizontal pressure gradient extends the applicability of a 1-D lake model formulation to small lakes, which size is less than internal Rossby radius, and where pressure gradient dominates over Coriolis force. ©2020. The Authors.
英文关键词	1-D models; lakes; parameterization; pressure gradient; seiches
语种	英语
scopus关键词	Fourier series; Friction; One dimensional; Parameterization; Pressure gradient; Reservoirs (water); 1-D models; Computational costs; Enclosed reservoirs; Horizontal pressure; Induced temperature; seiches; Synoptic variability; Vertical displacements; Lakes; bottom friction; one-dimensional modeling; parameterization; pressure gradient; seiche; Italy; Lake Iseo; Lombardy
来源期刊	Journal of Advances in Modeling Earth Systems
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/156757
作者单位	Research Computing Center, Lomonosov Moscow State University, Moscow, Russian Federation; Faculty of Geography, Lomonosov Moscow State University, Moscow, Russian Federation; DICATAM, Facoltà di Ingegneria, Università degli Studi di Brescia, Brescia, Italy
推荐引用方式 GB/T 7714	Stepanenko V.M.,Valerio G.,Pilotti M.. Horizontal Pressure Gradient Parameterization for One-Dimensional Lake Models[J],2020,12(2).
APA	Stepanenko V.M.,Valerio G.,&Pilotti M..(2020).Horizontal Pressure Gradient Parameterization for One-Dimensional Lake Models.Journal of Advances in Modeling Earth Systems,12(2).
MLA	Stepanenko V.M.,et al."Horizontal Pressure Gradient Parameterization for One-Dimensional Lake Models".Journal of Advances in Modeling Earth Systems 12.2(2020).