DOI: 10.1007/s00382-016-3358-2
Scopus记录号: 2-s2.0-84988643511
论文题名: Spatial spin-up of fine scales in a regional climate model simulation driven by low-resolution boundary conditions
作者: Matte D. ; Laprise R. ; Thériault J.M. ; Lucas-Picher P.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2017
卷: 49, 期: 2017-01-02 起始页码: 563
结束页码: 574
语种: 英语
英文关键词: Big-Brother experiment
; Jump of resolution
; Nested model
; Regional climate modelling
; Spatial spin-up
英文摘要: In regional climate modelling, it is well known that domains should be neither too large to avoid a large departure from the driving data, nor too small to provide a sufficient distance from the lateral inflow boundary to allow the full development of the small-scale (SS) features permitted by the finer resolution. Although most practitioners of dynamical downscaling are well aware that the jump of resolution between the lateral boundary condition (LBC) driving data and the nested regional climate model affects the simulated climate, this issue has not been fully investigated. In principle, as the jump of resolution becomes larger, the region of interest in the limited-area domain should be located further away from the lateral inflow boundary to allow the full development of the SS features. A careless choice of domain might result in a suboptimal use of the full finer resolution potential to develop fine-scale features. To address this issue, regional climate model (RCM) simulations using various resolution driving data are compared following the perfect-prognostic Big-Brother protocol. Several experiments were carried out to evaluate the width of the spin-up region (i.e. the distance between the lateral inflow boundary and the domain of interest required for the full development of SS transient eddies) as a function of the RCM and LBC resolutions, as well as the resolution jump. The spin-up distance turns out to be a function of the LBC resolution only, independent of the RCM resolution. When varying the RCM resolution for a given resolution jump, it is found that the spin-up distance corresponds to a fixed number of RCM grid points that is a function of resolution jump only. These findings can serve a useful purpose to guide the choice of domain and RCM configuration for an optimal development of the small scales allowed by the increased resolution of the nested model. © 2016, The Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/53163
Appears in Collections: 过去全球变化的重建
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作者单位: Department of Earth and Atmospheric science, Centre ESCER, Université du Québec à Montréal (UQAM), P.O. Box 8888, Downtown Station, Montréal, QC, Canada
Recommended Citation:
Matte D.,Laprise R.,Thériault J.M.,et al. Spatial spin-up of fine scales in a regional climate model simulation driven by low-resolution boundary conditions[J]. Climate Dynamics,2017-01-01,49(2017-01-02)