气候变化领域集成服务门户(CCPortal): The vertical variability of black carbon observed in the atmospheric boundary layer during DACCIWA

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DOI	10.5194/acp-20-7911-2020
	The vertical variability of black carbon observed in the atmospheric boundary layer during DACCIWA
	Altstädter B.; Deetz K.; Vogel B.; Babić K.; Dione C.; Pacifico F.; Jambert C.; Ebus F.; Bärfuss K.; Pätzold F.; Lampert A.; Adler B.; Kalthoff N.; Lohou F.
发表日期	2020
ISSN	1680-7316
起始页码	7911
结束页码	7928
卷号	20 期号:13
英文摘要	This study underlines the important role of the transported black carbon (BC) mass concentration in the West African monsoon (WAM) area. BC was measured with a micro-aethalometer integrated in the payload bay of the unmanned research aircraft ALADINA (Application of Light-weight Aircraft for Detecting IN situ Aerosol). As part of the DACCIWA (Dynamics-Aerosol-Chemistry-Cloud Interactions in West Africa) project, 53 measurement flights were carried out at Savè, Benin, on 2-16 July 2016. A high variability of BC (1.79 to 2.42±0.31 μg m-3) was calculated along 155 vertical profiles that were performed below cloud base in the atmospheric boundary layer (ABL). In contrast to initial expectations of primary emissions, the vertical distribution of BC was mainly influenced by the stratification of the ABL during the WAM season. The article focuses on an event (14 and 15 July 2016) which showed distinct layers of BC in the lowermost 900 m above ground level (a.g.l.). Low concentrations of NOx and CO were sampled at the Savè supersite near the aircraft measurements and suggested a marginal impact of local sources during the case study. The lack of primary BC emissions was verified by a comparison of the measured BC with the model COSMO-ART (Consortium for Small-scale Modelling-Aerosols and Reactive Trace gases) that was applied for the field campaign period. The modelled vertical profiles of BC led to the assumption that the measured BC was already altered, as the size was mainly dominated by the accumulation mode. Further, calculated vertical transects of wind speed and BC presume that the observed BC layer was transported from the south with maritime inflow but was mixed vertically after the onset of a nocturnal low-level jet at the measurement site. This report contributes to the scope of DACCIWA by linking airborne BC data with ground observations and a model, and it illustrates the importance of a more profound understanding of the interaction between BC and the ABL in the WAM region. © Author(s) 2020. This work is distributed under the Creative Commons Attribution 4.0 License.
语种	英语
scopus关键词	airborne survey; atmospheric modeling; black carbon; boundary layer; concentration (composition); monsoon; vertical distribution; Benin [West Africa]
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/247667
作者单位	Institute of Flight Guidance, Technische Universität Braunschweig, Braunschweig, Germany; Institute of Meteorology and Climate Research, Karlsruhe Institute of Technology, Karlsruhe, Germany; Laboratoire d'Aérologie, Université de Toulouse, Cnrs, Ups, Toulouse, France; Croatia Control Ltd., Velika Gorica, Croatia; African Centre of Meteorological Applications for Development, Niamey, Niger; Cires, University of Colorado, Boulder, CO, United States; Noaa Physical Sciences Laboratory, Boulder, CO, United States
推荐引用方式 GB/T 7714	Altstädter B.,Deetz K.,Vogel B.,et al. The vertical variability of black carbon observed in the atmospheric boundary layer during DACCIWA[J],2020,20(13).
APA	Altstädter B..,Deetz K..,Vogel B..,Babić K..,Dione C..,...&Lohou F..(2020).The vertical variability of black carbon observed in the atmospheric boundary layer during DACCIWA.ATMOSPHERIC CHEMISTRY AND PHYSICS,20(13).
MLA	Altstädter B.,et al."The vertical variability of black carbon observed in the atmospheric boundary layer during DACCIWA".ATMOSPHERIC CHEMISTRY AND PHYSICS 20.13(2020).