气候变化领域集成服务门户(CCPortal): Combining POLDER-3 satellite observations and WRF-Chem numerical simulations to derive biomass burning aerosol properties over the southeast Atlantic region

CCPortal

DOI	10.5194/acp-21-17775-2021
	Combining POLDER-3 satellite observations and WRF-Chem numerical simulations to derive biomass burning aerosol properties over the southeast Atlantic region
	Siméon A.; Waquet F.; Péré J.-C.; Ducos F.; Thieuleux F.; Peers F.; Turquety S.; Chiapello I.
发表日期	2021
ISSN	1680-7316
起始页码	17775
结束页码	17805
卷号	21 期号:23
英文摘要	Aerosol absorption is a key property to assess the radiative impacts of aerosols on climate at both global and regional scales. The aerosol physico-chemical and optical properties remain not sufficiently constrained in climate models, with difficulties to properly represent both the aerosol load and their absorption properties in clear and cloudy scenes, especially for absorbing biomass burning aerosols (BBA). In this study we focus on biomass burning (BB) particle plumes transported above clouds over the southeast Atlantic (SEA) region off the southwest coast of Africa, in order to improve the representation of their physico-chemical and absorption properties. The methodology is based on aerosol regional numerical simulations from the WRF-Chem coupled meteorology-chemistry model combined with a detailed inventory of BB emissions and various sets of innovative aerosol remote sensing observations, both in clear and cloudy skies from the POLDER-3/PARASOL space sensor. Current literature indicates that some organic aerosol compounds (OC), called brown carbon (BrOC), primarily emitted by biomass combustion absorb the ultraviolet-blue radiation more efficiently than pure black carbon (BC). We exploit this specificity by comparing the spectral dependence of the aerosol single scattering albedo (SSA) derived from the POLDER-3 satellite observations in the 443-1020ĝ€¯nm wavelength range with the SSA simulated for different proportions of BC, OC and BrOC at the source level, considering the homogeneous internal mixing state of particles. These numerical simulation experiments are based on two main constraints: maintaining a realistic aerosol optical depth both in clear and above cloudy scenes and a realistic BC/OC mass ratio. Modelling experiments are presented and discussed to link the chemical composition with the absorption properties of BBA and to provide estimates of the relative proportions of black, organic and brown carbon in the African BBA plumes transported over the SEA region for July 2008. The absorbing fraction of organic aerosols in the BBA plumes, i.e. BrOC, is estimated at 2ĝ€¯% to 3ĝ€¯%. The simulated mean SSA are 0.81 (565ĝ€¯nm) and 0.84 (550ĝ€¯nm) in clear and above cloudy scenes respectively, in good agreement with those retrieved by POLDER-3 (0.85±0.05 at 565ĝ€¯nm in clear sky and at 550ĝ€¯nm above clouds) for the studied period. © Copyright:
语种	英语
scopus关键词	aerosol property; albedo; biomass burning; black carbon; computer simulation; optical property; physicochemical property; POLDER; remote sensing; satellite data
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/246386
作者单位	Université de Lille, CNRS, UMR 8518, Lille, 59000, France; LMD/IPSL, Sorbonne Université, ENS, Paris, France
推荐引用方式 GB/T 7714	Siméon A.,Waquet F.,Péré J.-C.,et al. Combining POLDER-3 satellite observations and WRF-Chem numerical simulations to derive biomass burning aerosol properties over the southeast Atlantic region[J],2021,21(23).
APA	Siméon A..,Waquet F..,Péré J.-C..,Ducos F..,Thieuleux F..,...&Chiapello I..(2021).Combining POLDER-3 satellite observations and WRF-Chem numerical simulations to derive biomass burning aerosol properties over the southeast Atlantic region.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(23).
MLA	Siméon A.,et al."Combining POLDER-3 satellite observations and WRF-Chem numerical simulations to derive biomass burning aerosol properties over the southeast Atlantic region".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.23(2021).