DOI: 10.1175/JCLI-D-11-00388.1
Scopus记录号: 2-s2.0-84870015812
论文题名: Dynamical downscaling over the Great Lakes Basin of North America using the WRF regional climate model: The impact of the great lakes system on regional greenhouse warming
作者: Gula J. ; Richard Peltier W.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2012
卷: 25, 期: 21 起始页码: 7723
结束页码: 7742
语种: 英语
Scopus关键词: Annual cycle
; Atmosphere-land interaction
; Atmospheric fields
; Climate change projections
; Community climate system model
; Down-scaling
; Dynamical downscaling
; Fresh water lakes
; Global models
; Global simulation
; Great lakes
; Great lakes basin
; Greenhouse warming
; Ice cover
; Lake model
; Lake surface temperature
; Lake water temperature
; North America
; Regional climate changes
; Regional climate models
; Regional model
; Spatial patterns
; Spatial resolution
; Warmer conditions
; Weather research and forecasting models
; Atmospheric temperature
; Climate change
; Climate models
; Computer simulation
; Global warming
; Snow
; Weather forecasting
; Lakes
; annual cycle
; atmosphere-biosphere interaction
; climate change
; climate modeling
; downscaling
; greenhouse effect
; ice cover
; lacustrine environment
; regional climate
; spatial resolution
; warming
; water temperature
; Great Lakes Basin
英文摘要: The Weather Research and Forecasting model (WRF) is employed to dynamically downscale global warming projections produced using the Community Climate System Model (CCSM). The analyses are focused on the Great Lakes Basin of North America and the climate change projections extend from the instrumental period (1979-2001) to midcentury (2050-60) at a spatial resolution of 10 km. Because WRF does not currently include a sufficiently realistic lake component, simulations are performed using lake water temperature provided by D.V. Mironov's freshwater lake model "FLake" forced by atmospheric fields from the global simulations. Results for the instrumentalera are first compared with observations to evaluate the ability of the lake model to provide accurate lake water temperature and ice cover and to analyze the skill of the regional model. It is demonstrated that the regional model, with its finer resolution and more comprehensive physics, provides significantly improved results compared to those obtained from the global model. It much more accurately captures the details of the annual cycle and spatial pattern of precipitation. In particular, much more realistic lake-induced precipitation and snowfall patterns downwind of the lakes are predicted. The midcentury projection is analyzed to determine the impact of downscaling on regional climate changes. The emphasis in this final phase of the analysis is on the impact of climate change on winter snowfall in the lee of the lakes. It is found that future changes in lake surface temperature and ice cover under warmer conditions may locally increase snowfall as a result of increasedevaporation and the enhanced lake effect. © 2012 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/52156
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Physics, University of Toronto, Toronto, ON, Canada
Recommended Citation:
Gula J.,Richard Peltier W.. Dynamical downscaling over the Great Lakes Basin of North America using the WRF regional climate model: The impact of the great lakes system on regional greenhouse warming[J]. Journal of Climate,2012-01-01,25(21)