DOI: 10.1016/j.atmosenv.2014.02.063
Scopus记录号: 2-s2.0-84895988771
论文题名: A study on the sensitivities of simulated aerosol optical properties to composition and size distribution using airborne measurements
作者: Esteve A ; R ; , Highwood E ; J ; , Morgan W ; T ; , Allen G ; , Coe H ; , Grainger R ; G ; , Brown P ; , Szpek K
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 89 起始页码: 517
结束页码: 524
语种: 英语
英文关键词: Aerosol composition
; Aerosol modelling
; Aircraft measurements
; Anthropogenic aerosols
; Hygroscopicity
; Optical properties
Scopus关键词: Absorption spectroscopy
; Aircraft
; Atmospheric aerosols
; Optical properties
; Refractive index
; Scattering
; Size distribution
; Aerosol composition
; Aerosol optical property
; Aerosol size distributions
; Aircraft measurement
; Anthropogenic aerosols
; Hygroscopic growth factor
; Hygroscopicity
; Scattering and absorption
; Uncertainty analysis
; black carbon
; sulfate
; absorption
; aerosol
; airborne survey
; anthropogenic source
; black carbon
; chemical composition
; climate modeling
; hygroscopicity
; numerical model
; parameterization
; relative humidity
; scattering
; sensitivity analysis
; size distribution
; uncertainty analysis
; absorption
; aerosol
; air analysis
; aircraft
; article
; atmospheric deposition
; calculation
; chemical composition
; climate
; concentration (parameters)
; humidity
; measurement
; optics
; particle size
; priority journal
; refraction index
; sensitivity analysis
; simulation
; spectrum
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要: We present a flexible framework to calculate the optical properties of atmospheric aerosols at a given relative humidity based on their composition and size distribution. The similarity of this framework to climate model parameterisations allows rapid and extensive sensitivity tests of the impact of uncertainties in data or of new measurements on climate relevant aerosol properties. The data collected by the FAAM BAe-146 aircraft during the EUCAARI-LONGREX and VOCALS-REx campaigns have been used in a closure study to analyse the agreement between calculated and measured aerosol optical properties for two very different aerosol types. The agreement achieved for the EUCAARI-LONGREX flights is within the measurement uncertainties for both scattering and absorption. However, there is poor agreement between the calculated and the measured scattering for the VOCALS-REx flights. The high concentration of sulphate, which is a scattering aerosol with no absorption in the visible spectrum, made the absorption measurements during VOCALS-REx unreliable, and thus no closure study was possible for the absorption. The calculated hygroscopic scattering growth factor overestimates the measured values during EUCAARI-LONGREX and VOCALS-REx by ~30% and ~20%, respectively. We have also tested the sensitivity of the calculated aerosol optical properties to the uncertainties in the refractive indices, the hygroscopic growth factors and the aerosol size distribution. The largest source of uncertainty in the calculated scattering is the aerosol size distribution (~35%), followed by the assumed hygroscopic growth factor for organic aerosol (~15%), while the predominant source of uncertainty in the calculated absorption is the refractive index of organic aerosol (28-60%), although we would expect the refractive index of black carbon to be important for aerosol with a higher black carbon fraction. © 2014 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/80854
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Earth Physics and Thermodynamics, University of Valencia, Spain; Department of Meteorology, University of Reading, United Kingdom; Centre for Atmospheric Science, The University of Manchester, United Kingdom; Atmospheric, Oceanic and Planetary Physics, University of Oxford, United Kingdom; The Met Office, United Kingdom
Recommended Citation:
Esteve A,R,, Highwood E,et al. A study on the sensitivities of simulated aerosol optical properties to composition and size distribution using airborne measurements[J]. Atmospheric Environment,2014-01-01,89