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DOI	10.1016/j.atmosres.2020.104891
	Atmospheric heating rate due to black carbon aerosols: Uncertainties and impact factors
	Lu Q.; Liu C.; Zhao D.; Zeng C.; Li J.; Lu C.; Wang J.; Zhu B.
发表日期	2020
ISSN	0169-8095
卷号	240
英文摘要	This study investigates the impacts of black carbon (BC) properties (vertical concentration, shape, size, and mixing state) and atmospheric variables (cloud and aerosol loading, surface albedo, and solar zenith angle) on BC radiative effects. Observations from aircraft measurements, lidar, and the Aerosol Robotic Network (AERONET) are used to constrain BC and aerosol properties. The library for radiative transfer (Libradtran) model is used to calculate BC radiative forcing (RF). BC optical properties are obtained from numerical modeling with aggregate or spherical structures and different size distributions. By modifying the optical properties, different BC geometries and size distributions result in uncertainties in RF and heating rate less than 30%, while the uncertainty in heating rate due to different BC mixing states is as large as ~80%. The vertical distribution of BC concentrations explains less than 10% of the relative differences in RF and heating rate in the atmosphere, but can induce different heating rate vertical profiles, thus different planetary boundary layer (PBL) stabilities. Due to the significant influence of cloudy and aerosol conditions on incident solar radiation, atmospheric conditions play an important role in determining the BC heating rate. Meanwhile, the effects of surface albedo and solar zenith angle on the BC heating rate are most significantly near the surface. Taking the above factors into account, we introduce an empirical approximation of the BC heating rate to estimate its influence on the atmosphere. With the simple formula, the BC heating rate for a particular atmospheric layer can be approximated when the vertical condition is known, and this can be further applied to determine whether BC promotes or suppresses PBL development. Considering the importance of the BC vertical concentration in its heating rate, we suggest that light-absorbing aerosols and their vertical distributions must be better measured and modeled to improve the understanding of their radiative effects and interaction with PBL. © 2020 Elsevier B.V.
英文关键词	Black carbon; Heating rate; Radiative forcing; Vertical distribution
语种	英语
scopus关键词	Aerosols; Aircraft accidents; Atmospheric radiation; Boundary layer flow; Boundary layers; Carbon; Fog; Heating rate; Incident solar radiation; Mixing; Optical properties; Optical radar; Size distribution; Aerosol robotic networks; Atmospheric heating rate; Black carbon; Empirical approximations; Light absorbing aerosols; Planetary boundary layers; Radiative forcings; Vertical distributions; Heating; aerosol property; black carbon; heating; radiative forcing; radiative transfer; size distribution; vertical distribution
来源期刊	Atmospheric Research
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/141935
作者单位	Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science and Technology, Nanjing, 210044, China; Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, School of Atmospheric Physics, Nanjing University of Information Science and Technology, Nanjing, 210044, China; Beijing Weather Modification Office, Beijing, 100089, China; Meteorological Disaster Prevention Center, Suzhou Meteorological Bureau, Suzhou, 215000, China; Department of Atmospheric and Ocean Sciences, Peking University, Beijing, 100871, China
推荐引用方式 GB/T 7714	Lu Q.,Liu C.,Zhao D.,et al. Atmospheric heating rate due to black carbon aerosols: Uncertainties and impact factors[J],2020,240.
APA	Lu Q..,Liu C..,Zhao D..,Zeng C..,Li J..,...&Zhu B..(2020).Atmospheric heating rate due to black carbon aerosols: Uncertainties and impact factors.Atmospheric Research,240.
MLA	Lu Q.,et al."Atmospheric heating rate due to black carbon aerosols: Uncertainties and impact factors".Atmospheric Research 240(2020).