DOI: 10.1002/2013MS000279
Scopus记录号: 2-s2.0-84912563744
论文题名: Improved dust representation in the Community Atmosphere Model
作者: Albani S ; , Mahowald N ; M ; , Perry A ; T ; , Scanza R ; A ; , Zender C ; S ; , Heavens N ; G ; , Maggi V ; , Kok J ; F ; , Otto-Bliesner B ; L
刊名: Journal of Advances in Modeling Earth Systems
ISSN: 19422466
出版年: 2015
卷: 6, 期: 3 起始页码: 541
结束页码: 570
语种: 英语
英文关键词: Aerosols
; Atmospheric aerosols
; Atmospheric radiation
; Balloons
; Glacial geology
; Optical properties
; Size distribution
; Uncertainty analysis
; Aerosol optical depths
; Aerosol-climate interactions
; Community atmosphere model
; Direct radiative forcing
; Dust optical properties
; Glacial-interglacial cycles
; Last Glacial Maximum
; Radiative forcings
; Dust
; aerosol composition
; Anthropocene
; atmospheric deposition
; atmospheric forcing
; atmospheric modeling
; atmospheric pollution
; climate effect
; dust
; glacial-interglacial cycle
; Last Glacial Maximum
; mineral
; optical depth
; particle size
; radiation balance
; radiative forcing
; size distribution
英文摘要: Aerosol-climate interactions constitute one of the major sources of uncertainty in assessing changes in aerosol forcing in the anthropocene as well as understanding glacial-interglacial cycles. Here we focus on improving the representation of mineral dust in the Community Atmosphere Model and assessing the impacts of the improvements in terms of direct effects on the radiative balance of the atmosphere. We simulated the dust cycle using different parameterization sets for dust emission, size distribution, and optical properties. Comparing the results of these simulations with observations of concentration, deposition, and aerosol optical depth allows us to refine the representation of the dust cycle and its climate impacts. We propose a tuning method for dust parameterizations to allow the dust module to work across the wide variety of parameter settings which can be used within the Community Atmosphere Model. Our results include a better representation of the dust cycle, most notably for the improved size distribution. The estimated net top of atmosphere direct dust radiative forcing is -0.23 ± 0.14 W/m2 for present day and -0.32 ± 0.20 W/m2 at the Last Glacial Maximum. From our study and sensitivity tests, we also derive some general relevant findings, supporting the concept that the magnitude of the modeled dust cycle is sensitive to the observational data sets and size distribution chosen to constrain the model as well as the meteorological forcing data, even within the same modeling framework, and that the direct radiative forcing of dust is strongly sensitive to the optical properties and size distribution used. © 2014. The Authors. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/76003
Appears in Collections: 影响、适应和脆弱性 气候变化与战略
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作者单位: Department of Earth and Atmospheric Sciences, Cornell University, Ithaca, NY, United States; Department of Environmental Sciences, University of Milano-Bicocca, Milano, Italy; Department of Earth System Science, University of California, Irvine, CA, United States; Department of Atmospheric and Planetary Sciences, Hampton University, Hampton, VA, United States; Now at Department of Atmospheric and Oceanic Sciences, University of California, Los Angeles, CA, United States; National Center for Atmospheric Research, Boulder, CO, United States
Recommended Citation:
Albani S,, Mahowald N,M,et al. Improved dust representation in the Community Atmosphere Model[J]. Journal of Advances in Modeling Earth Systems,2015-01-01,6(3)