气候变化领域集成服务门户(CCPortal): Biomass burning pollution in the South Atlantic upper troposphere: GLORIA trace gas observations and evaluation of the CAMS model

CCPortal

DOI	10.5194/acp-22-3675-2022
	Biomass burning pollution in the South Atlantic upper troposphere: GLORIA trace gas observations and evaluation of the CAMS model
	Johansson, Soeren; Wetzel, Gerald; Friedl-Vallon, Felix; Glatthor, Norbert; Hoepfner, Michael; Kleinert, Anne; Neubert, Tom; Sinnhuber, Bjoern-Martin; Ungermann, Joern
发表日期	2022
ISSN	1680-7316
EISSN	1680-7324
起始页码	3675
结束页码	3691
卷号	22 期号:5 页码:17
英文摘要	In this study, we present simultaneous airborne measurements of peroxyacetyl nitrate (PAN), ethane (C2H6), formic acid (HCOOH), methanol (CH3OH), and ethylene (C2H4) above the South Atlantic in September and October 2019. Observations were obtained from the Gimballed Limb Observer for Radiance Imaging of the Atmosphere (GLORIA), as two-dimensional altitude cross sections along the flight path. The flights were part of the SouthTRAC (Transport and Composition in the Southern Hemisphere Upper Troposphere/Lower Stratosphere) campaign with the German High Altitude and Long Range Research Aircraft (HALO). On two flights (8 September 2019 and 7 October 2019), large enhancements of all these substances were found between 7 and 14 km altitude with maximum volume mixing ratios (VMRs) of 1000 pptv for PAN, 1400 pptv for C2H6, 800 pptv for HCOOH, 4500 pptv for CH3OH, and 200 pptv for C2H4. One flight showed a common filamentary structure in the trace gas distributions, while the second flight is characterized by one large plume. Using backward trajectories, we show that measured pollutants likely reached upper troposphere and lower stratosphere (UTLS) altitudes above South America and central Africa, where elevated PAN VMRs are visible at the surface layer of the Copernicus Atmosphere Monitoring Service (CAMS) model during the weeks before both measurements. In comparison to results of the CAMS reanalysis interpolated onto the GLORIA measurement geolocations, we show that the model is able to reproduce the overall structure of the measured pollution trace gas distributions. For PAN, the absolute VMRs are in agreement with the GLORIA measurements. However, C2H6 and HCOOH are generally underestimated by the model, while CH3OH and C2H4, the species with the shortest atmospheric lifetimes of the pollution trace gases discussed, are overestimated by CAMS. The good agreement between model and observations for PAN suggests that the general transport pathways and emissions locations are well captured by the model. The poorer agreement for other species is therefore most likely linked to model deficiencies in the representation of loss processes and emission strength.
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:000772234000001
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/273433
作者单位	Helmholtz Association; Karlsruhe Institute of Technology; Helmholtz Association; Research Center Julich; Helmholtz Association; Research Center Julich
推荐引用方式 GB/T 7714	Johansson, Soeren,Wetzel, Gerald,Friedl-Vallon, Felix,et al. Biomass burning pollution in the South Atlantic upper troposphere: GLORIA trace gas observations and evaluation of the CAMS model[J],2022,22(5):17.
APA	Johansson, Soeren.,Wetzel, Gerald.,Friedl-Vallon, Felix.,Glatthor, Norbert.,Hoepfner, Michael.,...&Ungermann, Joern.(2022).Biomass burning pollution in the South Atlantic upper troposphere: GLORIA trace gas observations and evaluation of the CAMS model.ATMOSPHERIC CHEMISTRY AND PHYSICS,22(5),17.
MLA	Johansson, Soeren,et al."Biomass burning pollution in the South Atlantic upper troposphere: GLORIA trace gas observations and evaluation of the CAMS model".ATMOSPHERIC CHEMISTRY AND PHYSICS 22.5(2022):17.