DOI: 10.1016/j.atmosenv.2018.03.006
Scopus记录号: 2-s2.0-85044125116
论文题名: Chemical, optical and radiative characteristics of aerosols during haze episodes of winter in the North China Plain
作者: Ding J ; , Zhang Y ; , Han S ; , Xiao Z ; , Wang J ; , Feng Y
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2018
卷: 181 起始页码: 164
结束页码: 176
语种: 英语
英文关键词: Aerosol
; Chemical components
; Heating rate
; Optical properties
; Radiative forcing
Scopus关键词: Atmospheric chemistry
; Atmospheric radiation
; Boundary layers
; Cooling
; Electromagnetic wave absorption
; Heating
; Heating rate
; Light absorption
; Meteorological instruments
; Optical properties
; Radiative transfer
; Water vapor
; Aerosol light absorption
; Atmospheric heating rate
; Chemical component
; Extinction coefficients
; Planetary boundary layers
; Radiative characteristics
; Radiative forcings
; Radiative transfer model
; Aerosols
; aerosol
; boundary layer
; chemical analysis
; episodic event
; haze
; heating
; optical method
; optical property
; radiative forcing
; urban atmosphere
; winter
; China
; North China Plain
; Tianjin
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: Aerosol and water vapor radiative forcings, shortwave atmospheric heating rates and longwave atmospheric cooling rates were determined based on in situ physical and chemical measurements of aerosol, associated with the Mie theory and a radiative transfer model, LOWTRAN7, during the two haze episodes in the winter of 2013 in Tianjin, China. The aerosol types considered in LOWTRAN7 included rural, urban, marine, desert and custom aerosols. The default ratio of the absorption coefficient to the extinction coefficient for urban aerosol in LOWTRAN7 was approximately double of those found in this work, implying the weaker absorption ability of aerosols in the North China Plain (NCP). Moreover, the aerosol is assumed to be evenly distributed below 1 km of planetary boundary layer (PBL) on hazy days in LOWTRAN7. If the default urban aerosol optical properties and extinction profile in LOWTRAN7 is employed directly, a larger energy imbalance between the atmosphere and surface is generated and the warming effect of the aerosol is magnified. Hence, modified urban aerosol optical properties were established to replace the corresponding parameters’ database in LOWTRAN7. The aerosol extinction profiles were obtained based on a 255-m meteorological tower and observed results from the studies about Tianjin. In the NCP, the aerosol had little impact on atmospheric counter radiation. The water vapor is the crucial factor that affects atmospheric counter radiation. Both modified high shortwave heating rates and longwave cooling rates occur near the surface due to the abundance of aerosol and water vapor. The modified net atmospheric heating rate near the surface is 1.2 K d−1 on hazy days and 0.3 K d−1 on non-hazy days. Compared with the default urban aerosol optical properties and its vertical distribution in LOWTRAN7, the feedback effect of the modified urban aerosol on the boundary layer may not necessarily result in a stable lower atmosphere, but depends on the aerosol light absorption ability and its vertical distribution. © 2018 Elsevier Ltd
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/82918
Appears in Collections: 气候变化事实与影响
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作者单位: State Environmental Protection Key Laboratory of Urban Ambient Air Particulate Matter Pollution Prevention and Control, College of Environmental Science and Engineering, Nankai University, Tianjin, China; Tianjin Institute of Meteorological Science, Tianjin, China; Tianjin Environmental Monitoring Center, Tianjin, China
Recommended Citation:
Ding J,, Zhang Y,, Han S,et al. Chemical, optical and radiative characteristics of aerosols during haze episodes of winter in the North China Plain[J]. Atmospheric Environment,2018-01-01,181