DOI: 10.1002/2017MS000937
Scopus记录号: 2-s2.0-85029364931
论文题名: Development of a global aerosol model using a two-dimensional sectional method: 2. Evaluation and sensitivity simulations
作者: Matsui H ; , Mahowald N
刊名: Journal of Advances in Modeling Earth Systems
ISSN: 19422466
出版年: 2017
卷: 9, 期: 4 起始页码: 1887
结束页码: 1920
语种: 英语
英文关键词: Atmospheric aerosols
; Bins
; Mixing
; Optical properties
; Size distribution
; Global aerosol
; Mixing state
; New particle formation
; Organic aerosol formation
; Sectional methods
; Aerosols
; aerosol
; atmospheric modeling
; black carbon
; complexity
; concentration (composition)
; optical depth
; particle size
; sensitivity analysis
; simulation
; size distribution
; two-dimensional modeling
英文摘要: Global aerosol simulations are conducted by using the Community Atmosphere Model version 5 with the Aerosol Two-dimensional bin module for foRmation and Aging Simulation version 2 (CAM5-chem/ATRAS2) which was developed in part 1. The model uses a two-dimensional (2-D) section representation with 12 size bins from 1 nm to 10 μm and 8 black carbon (BC) mixing state bins, and it can calculate detailed aerosol processes and their interactions with radiation and clouds. The simulations have similar or better agreement with aerosol observations (e.g., aerosol optical depth, absorption aerosol optical depth (AAOD), aerosol number concentrations, mass concentrations of each species) compared with the simulations using the Modal Aerosol Model with three modes. Sensitivity simulations show that global mean AAOD is reduced by 15% by resolving BC mixing state as a result of two competing effects (optical and lifetime effects). AAOD is reduced by 10–50% at low and midlatitudes in the 2-D sectional simulation because BC absorption enhancement by coating species is reduced by resolving pure BC, thinly coated BC, and BC-free particles in the model (optical effect). In contrast, AAOD is enhanced by 5–30% at high-latitudes because BC concentrations are enhanced by 40–200% over the regions by resolving less CCN active particles (lifetime effect). The simulations also suggest a model which resolves more than 3 BC categories (including BC-free particles) is desirable to calculate the optical and lifetime effects accurately. The complexity of aerosol representation is shown to be especially important for simulations of BC and CCN concentrations and AAOD. © 2017. The Authors. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/75748
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: Graduate School of Environmental Studies, Nagoya University, Nagoya, Japan; Department of Earth and Atmospheric Sciences, Cornell University, Ithaca, NY, United States
Recommended Citation:
Matsui H,, Mahowald N. Development of a global aerosol model using a two-dimensional sectional method: 2. Evaluation and sensitivity simulations[J]. Journal of Advances in Modeling Earth Systems,2017-01-01,9(4)