DOI: 10.1002/jgrd.50725
论文题名: Toward a comprehensive global electric circuit model: Atmospheric conductivity and its variability in CESM1(WACCM) model simulations
作者: Baumgaertner A.J.G. ; Thayer J.P. ; Neely III R.R. ; Lucas G.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 16 起始页码: 9221
结束页码: 9232
语种: 英语
Scopus关键词: Aerosols
; Electric lines
; Electric network analysis
; Networks (circuits)
; Troposphere
; Aircraft measurement
; Atmospheric conductivity
; Global electric circuit
; High-resolution models
; Number concentration
; Spatial and temporal variability
; Stratospheric aerosols
; Whole atmosphere community climate models
; Computer simulation
; aerosol
; airborne survey
; atmospheric electricity
; atmospheric modeling
; balloon observation
; cosmic ray
; electrical conductivity
; mobility
; numerical model
; radon
; seasonal variation
; spatiotemporal analysis
; stratosphere
; troposphere
英文摘要: As an important step in further modeling and understanding the global electric circuit, the Community Earth System Model (CESM1) has been extended to provide a calculation of conductivity in the troposphere and stratosphere. Conductivity depends on ion mobility and ion concentration, the latter being controlled by a number of ion production and loss processes. This leads to a complex dependency of conductivity on most importantly galactic cosmic ray flux, radon emissions from the Earth's surface, aerosol number concentrations, clouds, and temperature. To cover this variety in parameters for calculating and evaluating conductivity, an Earth system model is extremely useful. Here the extension of CESM1 to calculate conductivity is described, and the results are discussed with a focus on their spatial and temporal variabilities. The results are also compared to balloon and aircraft measurements, and good agreement is found for undisturbed conditions and during a solar proton event. The conductivity model implementation is a significant improvement to previous studies because of the high-quality, high-resolution model data input. Notably, the aerosol representation provided by off-line calculations of tropospheric and stratospheric aerosol using the Community Aerosol and Radiation Model for Atmospheres as part of CESM1(WACCM) (Whole Atmosphere Community Climate Model) provides a realistic computation of the impact of the background aerosol distribution for the first time. In addition to the novel high-resolution information on conductivity, it is found that an intra-annual cycle exists in the total global resistance, varying between 220 and 245 Ω. The model shows that this cycle is driven equally by seasonal aerosol and cloud variations. © 2013. Her Majesty the Queen in Right of Canada. American Geophysical Union.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63399
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: Department of Aerospace Engineering Sciences, University of Colorado Boulder, ECNT 320, 431 UCB, Boulder, CO 80309-0429, United States; High Altitude Observatory, National Center for Atmospheric Research, Boulder, CO, United States; Atmospheric Chemistry Division, National Center for Atmospheric Research, Boulder, CO, United States
Recommended Citation:
Baumgaertner A.J.G.,Thayer J.P.,Neely III R.R.,et al. Toward a comprehensive global electric circuit model: Atmospheric conductivity and its variability in CESM1(WACCM) model simulations[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(16)