干旱区生态环境知识资源中心(Arid): Analysis of Radiative Properties and Direct Radiative Forcing Estimates of Dominant Aerosol Clusters over an Urban-Desert Region in West Africa

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DOI	10.4209/aaqr.2017.12.0600
	Analysis of Radiative Properties and Direct Radiative Forcing Estimates of Dominant Aerosol Clusters over an Urban-Desert Region in West Africa
	Fawole, Olusegun G.1,2; Cai, Xiaoming 2; Pinker, Rachel T.4; MacKenzie, A. R.2,3
通讯作者	Fawole, Olusegun G.
来源期刊	AEROSOL AND AIR QUALITY RESEARCH
ISSN	1680-8584
EISSN	2071-1409
出版年	2019
卷号	19 期号:1 页码:38-48
英文摘要	The strategic location of the AERONET site in Ilorin, Nigeria, makes it possible to obtain information on several aerosol types and their radiative effects. The strong reversal of wind direction occasioned by the movement of the ITCZ during the West Africa Monsoon (WAM) plays a major role in the variability of aerosol nature at this site, which is confirmed by aerosol optical depth (AOD) (675 nm) and angstrom ngstrom exponent (AE) (440-870 nm) values with 1st and 99th percentile values of 0.08 and 2.16, and 0.11 and 1.47, respectively. The direct radiative forcing (DRF) and radiative forcing efficiency (RFE) of aerosol, as retrieved from the AERONET sun-photometer measurements, are estimated using radiative transfer calculations for the periods of 2005-2009 and 2011-2015. The DRF and RFE of the dominant aerosol classes-desert dust (DD), biomass burning (BB), urban (UB) and gas flaring (GF)-have been estimated. The median (+/- standard deviation) values of the DRF at the top of the atmosphere (TOA) for the DD, BB, UB and GF aerosol classes are -27.5 +/- 13.2 Wm(-2), -27.1 +/- 8.3 Wm(-2), -11.5 +/- 13.2 Wm(-2) and -9.6 +/- 8.0 Wm(-2), respectively, while those of the RFE are -26.2 +/- 4.1 Wm(-2) delta(-1), -35.2 +/- 4.6 Wm(-2) delta(-1), -31.0 8.4 Wm(-2) delta(-1) and -37.0 +/- 10.3 Wm(-2) delta(-1), respectively. Arguably due to its high SSA and assymetric values, the DD aerosol class shows the largest DRF but the smallest RFE. Its smallest AOD notwithstanding, the GF class can cause greater perturbation of the earth-atmosphere system in the sub-region both directly and indirectly, possibly due to the presence of black carbon and other co-emitted aerosol and the ageing of the GF aerosols. This study presents the first estimate of DRF for aerosols of gas flaring origin and shows that its radiative potential can be similar in magnitude to that of biomass burning and urban aerosol in West Africa.
英文关键词	Gas flaring West African Monsoon Direct radiative forcing Radiative forcing efficiency Assymetric parameter
类型	Article
语种	英语
国家	Nigeria ; England ; USA
开放获取类型	gold, Green Submitted, Green Published
收录类别	SCI-E
WOS记录号	WOS:000454435000005
WOS关键词	OPTICAL-PROPERTIES ; ASYMMETRY PARAMETER ; AIR-POLLUTION ; AERONET SUN ; VARIABILITY ; ENVIRONMENT ; LOCATIONS ; FRACTION ; NETWORK ; FOREST
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/213906
作者单位	1.Obafemi Awolowo Univ, Dept Phys & Engn Phys, Ife 220005, Nigeria; 2.Univ Birmingham, Sch Geog Earth & Environm Sci, Birmingham B15 2TT, W Midlands, England; 3.Univ Birmingham, Birmingham Inst Forest Res BIFoR, Birmingham B15 2TT, W Midlands, England; 4.Univ Maryland, Dept Atmospher & Ocean Sci, College Pk, MD 20742 USA
推荐引用方式 GB/T 7714	Fawole, Olusegun G.,Cai, Xiaoming,Pinker, Rachel T.,et al. Analysis of Radiative Properties and Direct Radiative Forcing Estimates of Dominant Aerosol Clusters over an Urban-Desert Region in West Africa[J],2019,19(1):38-48.
APA	Fawole, Olusegun G.,Cai, Xiaoming,Pinker, Rachel T.,&MacKenzie, A. R..(2019).Analysis of Radiative Properties and Direct Radiative Forcing Estimates of Dominant Aerosol Clusters over an Urban-Desert Region in West Africa.AEROSOL AND AIR QUALITY RESEARCH,19(1),38-48.
MLA	Fawole, Olusegun G.,et al."Analysis of Radiative Properties and Direct Radiative Forcing Estimates of Dominant Aerosol Clusters over an Urban-Desert Region in West Africa".AEROSOL AND AIR QUALITY RESEARCH 19.1(2019):38-48.