DOI: 10.1016/j.atmosenv.2017.06.048
Scopus记录号: 2-s2.0-85022094395
论文题名: Temporal characteristics of columnar aerosol optical properties and radiative forcing (2011–2015) measured at AERONET's Pretoria_CSIR_DPSS site in South Africa
作者: Kumar K ; R ; , Kang N ; , Sivakumar V ; , Griffith D
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2017
卷: 165 起始页码: 274
结束页码: 289
语种: 英语
英文关键词: AOD
; Biomass burning
; Radiative forcing
; SSA
; Sunphotometer
Scopus关键词: Absorption cooling
; Aerosols
; Atmospheric aerosols
; Atmospheric radiation
; Biomass
; Aerosol optical property
; Aerosol radiative forcing
; Biomass-burning
; Ground-based observations
; Influence of meteorologies
; Radiative forcings
; Sun photometers
; Temporal characteristics
; Optical properties
; absorbance
; AERONET
; aerosol property
; biomass burning
; heating
; meteorology
; photometer
; radiance
; radiative forcing
; radiometer
; site investigation
; solar radiation
; temporal analysis
; water vapor
; absorption
; aerosol
; air pollution
; Article
; atmosphere
; autumn
; biomass
; biomass burning
; cooling
; heating
; histogram
; mineral dust
; optical depth
; precipitable water vapor content
; precipitation
; priority journal
; radiation absorption
; radiation detector
; radiative forcing
; refraction index
; seasonal variation
; solar radiation
; South Africa
; spectral sensitivity
; spring
; summer
; sun
; surface property
; water vapor
; winter
; Gauteng
; Pretoria
; South Africa
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: Ground-based observations of the spectral aerosol optical depths (AODs) revealed that the northwest of South Africa (SA) possessed large aerosol loading and still remained unexplored as none of the authors have been extensively studied. The characteristics of aerosol optical, physical, and radiative properties, as well as their relationships presented in this paper, were derived from the direct sun and sky radiances measured at Pretoria during August 2011–December 2015 using the AERONET's (CE-318) automatic sun/sky radiometer. The annual mean AOD440, AE440-870, and SSA-T440 estimated at Pretoria during the study period were 0.23 ± 0.13, 1.50 ± 0.26, and 0.91 ± 0.04, respectively. The mean AOD440 (AE440-870) for the study period appeared higher during the spring and summer seasons (summer), suggest dominance of fine mode particles attributed to biomass burning activities and seasonal influence of meteorology. Analysis of frequency occurrences of AOD and AE also indicate that this region is richly populated with fine mode particles. Further, the AOD-AE relationship was studied at Pretoria and the result concluded that the mixed type aerosols contributed more among the others followed by the urban/industrial-biomass burning and clean continental (background) aerosols. The high summertime SSA-T440 and fine mode radius of AVSD could be associated with the hygroscopic growth of water-soluble aerosols under high water vapor (absorbing aerosols). The positive (negative) values of aerosol radiative forcing (ARF) were observed in all the months, an indication of significant heating (cooling) within the atmosphere (top of the atmosphere (TOA) and bottom of the atmosphere (BOA)) were due to strong absorption (scattering) of radiation. Further, the efficiency derived between ARF and AOD440 indicated that ARF is a strong function of AOD at the BOA noted with a high degree of correlation coefficient (r = 0.93). © 2017 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/82303
Appears in Collections: 气候变化事实与影响
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作者单位: Collaborative Innovation Centre on Forecast and Evaluation of Meteorological Disasters, Key Laboratory of Meteorological Disasters, Ministry of Education (KLME), Joint International Laboratory on Climate and Environment Change (ILCEC), Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, School of Atmospheric Physics, Nanjing University of Information Science and Technology, Nanjing, Jiangsu, China; Discipline of Physics, School of Chemistry and Physics, University of KwaZulu-Natal, Durban, Kwazulu-Natal, South Africa; Optronic Sensor Systems, Council for Scientific and Industrial Research (CSIR)–DPSS, Pretoria, Gauteng, South Africa
Recommended Citation:
Kumar K,R,, Kang N,et al. Temporal characteristics of columnar aerosol optical properties and radiative forcing (2011–2015) measured at AERONET's Pretoria_CSIR_DPSS site in South Africa[J]. Atmospheric Environment,2017-01-01,165