气候变化领域集成服务门户(CCPortal): Vertical aerosol particle exchange in the marine boundary layer estimated from helicopter-borne measurements in the Azores region

CCPortal

DOI	10.5194/acp-22-10007-2022
	Vertical aerosol particle exchange in the marine boundary layer estimated from helicopter-borne measurements in the Azores region
	Lueckerath, Janine; Held, Andreas; Siebert, Holger; Michalkow, Michel; Wehner, Birgit
发表日期	2022
ISSN	1680-7316
EISSN	1680-7324
起始页码	10007
结束页码	10021
卷号	22 期号:15 页码:15
英文摘要	Aerosol particles are important for radiation effects, cloud formation, and therefore the climate system. A detailed understanding of the spatial distribution of aerosol particles within the atmospheric boundary layer, which depends on sources and sinks, as well as long-range transport and vertical exchange, is important. Especially in marine regions, where the climate effect of clouds is comparably high, long-range transport with subsequent vertical mixing dominates over local aerosol sources. In this study, three different methods were applied to estimate the vertical aerosol particle flux in the marine boundary layer (MBL) and the vertical exchange between the MBL and the free troposphere (FT): eddy covariance (EC), flux-gradient similarity (K theory), and the mixed-layer gradient method (MLG). For the first time, MBL aerosol fluxes derived from these three methods were compared in the framework of the Azores Stratocumulus Measurements of Radiation, Turbulence and Aerosols (ACORES) field campaign in the Azores region in the northeastern Atlantic Ocean in July 2017. Meteorological parameters and aerosol and cloud properties were measured in the marine troposphere using the helicopter-borne measurement platform ACTOS (Airborne Cloud Turbulence Observation System). All three methods were applied to estimate the net particle exchange between MBL and FT. In many cases, the entrainment fluxes of the MLG method agreed within the range of uncertainty with the EC and K-theory flux estimates close to the top of the MBL, while the surface flux estimates of the different methods diverged. It was not possible to measure directly above the surface with the helicopter-borne payload, which might be a source of uncertainty in the surface fluxes. The observed particle fluxes at the top of the MBL ranged from 0 to 10x10(6) m(-2) s(-1) both in the upward and the downward direction, and the associated uncertainties were on the same order of magnitude. Even though the uncertainties of all three methods are considerable, the results of this study contribute to an improved understanding of the transport of particles between the MBL and FT and their distribution in the MBL.
学科领域	Environmental Sciences; Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000835746700001
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/273709
作者单位	Leibniz Institut fur Tropospharenforschung (TROPOS); Technical University of Berlin; University of Bayreuth
推荐引用方式 GB/T 7714	Lueckerath, Janine,Held, Andreas,Siebert, Holger,et al. Vertical aerosol particle exchange in the marine boundary layer estimated from helicopter-borne measurements in the Azores region[J],2022,22(15):15.
APA	Lueckerath, Janine,Held, Andreas,Siebert, Holger,Michalkow, Michel,&Wehner, Birgit.(2022).Vertical aerosol particle exchange in the marine boundary layer estimated from helicopter-borne measurements in the Azores region.ATMOSPHERIC CHEMISTRY AND PHYSICS,22(15),15.
MLA	Lueckerath, Janine,et al."Vertical aerosol particle exchange in the marine boundary layer estimated from helicopter-borne measurements in the Azores region".ATMOSPHERIC CHEMISTRY AND PHYSICS 22.15(2022):15.