DOI: 10.1016/j.atmosenv.2020.117616
论文题名: Parametric analysis for global single scattering albedo calculations
作者: Jeong J.I. ; Jo D.S. ; Park R.J. ; Lee H.-M. ; Curci G. ; Kim S.-W.
刊名: Atmospheric Environment
ISSN: 1352-2310
出版年: 2020
卷: 234 语种: 英语
英文关键词: Aerosols
; Atmospheric radiation
; Bromine compounds
; Carbon
; Dust
; Mixing
; Refractive index
; Size distribution
; Soil testing
; Solar radiation
; Uncertainty analysis
; Aerosol direct radiative forcing
; Aerosol mass concentration
; Aerosol optical depths
; Aerosol optical property
; Aerosol robotic networks
; Chemical transport models
; Dust size distribution
; Single scattering albedo
; Atmospheric movements
; black carbon
; carbon
; chlormethine
; lead
; aerosol
; albedo
; atmospheric transport
; black carbon
; brown carbon
; global change
; parameter estimation
; radiative transfer
; scattering
; uncertainty analysis
; aerosol
; albedo
; Article
; concentration (parameter)
; controlled study
; density
; dust
; optical depth
; particle size
; particulate matter
; priority journal
; refraction index
; single scatter albedo
; soil
学科: Black carbon
; Brown carbon
; Direct radiative effect
; Single scattering albedo
中文摘要: Single scatter albedo (SSA) is a key parameter in radiative transport models for estimating aerosol direct radiative forcing (DRF) and is also a major contributor to DRF uncertainty. We investigate the sensitivity of SSA calculations to physical input parameters (e.g., mixing state, size distribution, density, and refractive index of aerosols) associated with absorbing aerosols (e.g., black carbon [BC], brown carbon [BrC], and soil dust). We attempted to estimate global aerosol SSAs using the 3-D global chemical transport model (GEOS-Chem) and a post-processing tool of aerosol optical properties (FlexAOD) and evaluated the model by comparing it with observed values. The model reproduces the observed variability of both the surface aerosol concentrations and aerosol optical depth (AOD) obtained from the Surface Particulate Matter Network (SPARTAN), the global Aerosol Mass Spectrometer (AMS), and the Aerosol Robotic Network (AERONET). Our sensitivity tests show that the physical input parameters, which are not as well understood as aerosol mass concentrations, can lead to large uncertainties in global SSA values. We find that BC mixing state, BrC, and a dust size distribution have significant impacts on the global SSA calculation. Their combined use can reduce aerosol SSA bias in the model by 43% at 440 nm, compared to observations. We also find that the direct radiative effect (DRE) of global aerosols increases by 10% (from −2.62 W m−2 to −2.36 W m−2) when the SSA bias is corrected. © 2020 Elsevier Ltd
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/160720
Appears in Collections: 气候变化与战略
There are no files associated with this item.
作者单位: School of Earth and Environmental Sciences, Seoul National University, Seoul, South Korea; Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO, United States; Department of Chemistry, University of Colorado, Boulder, CO, United States; Department of Physical and Chemical Sciences, University of L'Aquila, L'Aquila, Italy; Center of Excellence in Telesensing of Environment and Model Prediction of Severe Events (CETEMPS), University of L'Aquila, L'Aquila, Italy
Recommended Citation:
Jeong J.I.,Jo D.S.,Park R.J.,et al. Parametric analysis for global single scattering albedo calculations[J]. Atmospheric Environment,2020-01-01,234