DOI: 10.5194/gmd-13-269-2020
论文题名: The Canadian atmospheric transport model for simulating greenhouse gas evolution on regional scales: GEM-MACH-GHG v.137-reg
作者: Kim J. ; Polavarapu S.M. ; Chan D. ; Neish M.
刊名: Geoscientific Model Development
ISSN: 1991959X
出版年: 2020
卷: 13, 期: 1 语种: 英语
Scopus关键词: aircraft
; atmospheric modeling
; atmospheric transport
; boundary condition
; carbon flux
; greenhouse gas
; regional climate
; scale effect
; simulation
; California
; Canada
; United States
; Juglans
英文摘要: In this study, we present the development of a regional atmospheric transport model for greenhouse gas (GHG) simulation based on an operational weather forecast model and a chemical transport model at Environment and Climate Change Canada (ECCC), with the goal of improving our understanding of the high-spatiotemporal-resolution interaction between the atmosphere and surface GHG fluxes over Canada and the United States. The regional model uses 10 km×10 km horizontal grid spacing and 80 vertical levels spanning the ground to 0.1 hPa. The lateral boundary conditions of meteorology and tracers are provided by the global transport model used for GHG simulation at ECCC. The performance of the regional model and added benefit of the regional model over our lower-resolution global models is investigated in terms of modelled CO2 concentration and meteorological forecast quality for multiple seasons in 2015. We find that our regional model has the capability to simulate the high spatial (horizontal and vertical) and temporal scales of atmospheric CO2 concentrations based on comparisons to surface and aircraft observations. In addition, the bias and standard deviation of forecast error in boreal summer are reduced by the regional model. Better representation of model topography in the regional model results in improved simulation of the CO2 diurnal cycle compared to the global model at Walnut Grove, California. The new regional model will form the basis of a flux inversion system that estimates regional-scale fluxes of GHGs over Canada. © Author(s) 2020. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/159997
Appears in Collections: 气候变化与战略
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作者单位: Climate Research Division, Environment and Climate Change Canada, Toronto, ON M3H 5T4, Canada
Recommended Citation:
Kim J.,Polavarapu S.M.,Chan D.,et al. The Canadian atmospheric transport model for simulating greenhouse gas evolution on regional scales: GEM-MACH-GHG v.137-reg[J]. Geoscientific Model Development,2020-01-01,13(1)