DOI: 10.1002/2016MS000874
Scopus记录号: 2-s2.0-85007436816
论文题名: Improving organic aerosol treatments in CESM/CAM5: Development, application, and evaluation
作者: Glotfelty T ; , He J ; , Zhang Y
刊名: Journal of Advances in Modeling Earth Systems
ISSN: 19422466
出版年: 2017
卷: 9, 期: 2 起始页码: 1506
结束页码: 1539
语种: 英语
英文关键词: Aerosols
; Sensitivity analysis
; Aerosol indirect effect
; Basis sets
; CESM/CAM5
; Earth system model
; New particle formation
; Secondary organic aerosols
; Organic carbon
; aerosol
; climate modeling
; concentration (composition)
; enthalpy
; organic carbon
; parameterization
; sensitivity analysis
; simulation
; sulfuric acid
; vaporization
; wet deposition
英文摘要: New treatments for organic aerosol (OA) formation have been added to a modified version of the CESM/CAM5 model (CESM-NCSU). These treatments include a volatility basis set treatment for the simulation of primary and secondary organic aerosols (SOAs), a simplified treatment for organic aerosol (OA) formation from glyoxal, and a parameterization representing the impact of new particle formation (NPF) of organic gases and sulfuric acid. With the inclusion of these new treatments, the concentration of oxygenated organic aerosol increases by 0.33 µg m−3 and that of primary organic aerosol (POA) decreases by 0.22 µg m−3 on global average. The decrease in POA leads to a reduction in the OA direct effect, while the increased OOA increases the OA indirect effects. Simulations with the new OA treatments show considerable improvement in simulated SOA, oxygenated organic aerosol (OOA), organic carbon (OC), total carbon (TC), and total organic aerosol (TOA), but degradation in the performance of HOA. In simulations of the current climate period, despite some deviations from observations, CESM-NCSU with the new OA treatments significantly improves the magnitude, spatial pattern, seasonal pattern of OC and TC, as well as, the speciation of TOA between POA and OOA. Sensitivity analysis reveals that the inclusion of the organic NPF treatment impacts the OA indirect effects by enhancing cloud properties. The simulated OA level and its impact on the climate system are most sensitive to choices in the enthalpy of vaporization and wet deposition of SVOCs, indicating that accurate representations of these parameters are critical for accurate OA-climate simulations. © 2017. The Authors. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/75769
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 Marine, Earth, and Atmospheric Sciences, North Carolina State University, Raleigh, NC, United States
Recommended Citation:
Glotfelty T,, He J,, Zhang Y. Improving organic aerosol treatments in CESM/CAM5: Development, application, and evaluation[J]. Journal of Advances in Modeling Earth Systems,2017-01-01,9(2)