DOI: 10.1002/jgrd.50356
论文题名: Estimate of aerosol absorbing components of black carbon, brown carbon, and dust from ground-based remote sensing data of sun-sky radiometers
作者: Wang L. ; Li Z. ; Tian Q. ; Ma Y. ; Zhang F. ; Zhang Y. ; Li D. ; Li K. ; Li L.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 12 起始页码: 6534
结束页码: 6543
语种: 英语
英文关键词: absorbing aerosol
; black carbon
; brown carbon
; dust
; sun-sky radiometer
Scopus关键词: Atmospheric radiation
; Carbon
; Climate change
; Dust
; Radiometers
; Refractive index
; Volume fraction
; Absorbing aerosol
; Black carbon
; Brown carbons
; Ground-based remote sensing
; Light absorbing aerosols
; Single scattering albedo
; Spectral refractive indices
; Sun-sky radiometers
; Aerosols
; absorption
; aerosol
; carbon
; concentration (composition)
; dust
; estimation method
; fractionation
; in situ measurement
; remote sensing
; satellite data
英文摘要: Black carbon (BC), brown carbon (BrC), and mineral dust (DU) are three major light absorbing aerosols, playing important roles in climate change. Better knowledge of their concentrations is necessary for more accurate estimates of their radiative forcing effects of climate. We present a method to retrieve columnar contents of BC, BrC, and DU simultaneously from spectral refractive indices and spectral single scattering albedo obtained from the sun-sky radiometer measurements. Then, this method is applied to investigate the columnar volume fractions and mass concentrations of BC, BrC, and DU in Beijing, China, based on measurements obtained from 2009 to 2010. Results show that among the three absorbing aerosols, DU dominates the largest volume fraction in the total aerosol volume (20-45%), followed by BrC (5-25%), and BC (< 5%). The retrieved monthly mean content of each absorbing component exhibits clear seasonal variation. BrC dominates in late fall and winter (40-92.5 mg/m2), whereas is extremely low in summer (< 10 mg/m2). DU dominates in spring, ranging from 270 to 405 mg/m 2 (with volume fraction >30%), while during June-September, the DU fraction is generally lower than 30%. BC is characterized by low levels throughout the year. The monthly mean BC columnar mass concentration ([BC]) ranges from 2.7 to 7.3 mg/m2 with winter slightly higher than other seasons. As a preliminary validation, we compare our retrieved [BC] with in situ measurements. Similar day-to-day variation trends and good correlations are found between the retrieved [BC] and in situ measurements. Key Points Provide a method to retrieve the contents of three absorbing aerosols The contents of three absorbing aerosols in Beijing, China are investigated Our results agree well with the in-situ measurements and published results © 2013. American Geophysical Union. All Rights Reserved. 资助项目: 41222007
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63602
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: State Environmental Protection Key Laboratory of Satellites Remote Sensing, Institute of Remote Sensing and Digital Earth of Chinese Academy of Sciences, Beijing 100101, China; International Institute for Earth System Science, Nanjing University, Nanjing 210093, China
Recommended Citation:
Wang L.,Li Z.,Tian Q.,et al. Estimate of aerosol absorbing components of black carbon, brown carbon, and dust from ground-based remote sensing data of sun-sky radiometers[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(12)