中文版 | English
CCPortal
DOI10.5194/acp-24-3953-2024
Chemical properties and single-particle mixing state of soot aerosol in Houston during the TRACER campaign
发表日期2024
ISSN1680-7316
EISSN1680-7324
起始页码24
结束页码7
卷号24期号:7
英文摘要A high-resolution soot particle aerosol mass spectrometer (SP-AMS) was used to selectively measure refractory black carbon (rBC) and its associated coating material using both the ensemble size-resolved mass spectral mode and the event trigger single particle (ETSP) mode in Houston, Texas, in summer 2022. This study was conducted as part of the Department of Energy Atmospheric Radiation Measurement (ARM) program's TRacking Aerosol Convection interactions ExpeRiment (TRACER) field campaign. The study revealed an average ( +/- 1 sigma ) rBC concentration of 103 +/- 176 ng m - 3 . Additionally, the coatings on the BC particles were primarily composed of organics (59 %; 219 +/- 260 ng m - 3 ) and sulfate (26 %; 94 +/- 55 ng m - 3 ). Positive matrix factorization (PMF) analysis of the ensemble mass spectra of BC-containing particles resolved four distinct types of soot aerosol, including an oxidized organic aerosol (OOA BC , PMF ) factor associated with processed primary organic aerosol, an inorganic sulfate factor (SO 4 , BC , PMF ), an oxidized rBC factor (O-BC PMF ), and a mixed mineral dust-biomass burning aerosol factor with significant contribution from potassium (K-BB BC , PMF ). Additionally, K -means clustering analysis of the single-particle mass spectra identified eight different clusters, including soot particles enriched in hydrocarbon-like organic aerosol (HOA BC , ETSP ), sulfate (SO 4 , BC , ETSP ), two types of rBC, OOA (OOA BC , ETSP ), chloride (Cl BC , ETSP ), and nitrate (NO 3 , BC , ETSP ). The single-particle measurements demonstrate substantial variation in BC coating thickness with coating-to-rBC mass ratios ranging from 0.1 to 100. The mixing state index ( chi ), which denotes the degree of homogeneity of the soot aerosol, varied from 4 % to 94 % with a median of 40 %, indicating that the aerosol population lies in between internal and external mixing but has large temporal and source type variability. In addition, a significant fraction of BC-containing particles, a majority enriched with oxidized organics and sulfate, exhibit sufficiently high kappa values and diameters conducive to activation as cloud nuclei under atmospherically relevant supersaturation conditions. This finding bears significance in comprehending the aging processes of rBC-containing particles and their activation into cloud droplets. Our analysis highlights the complex nature of soot aerosol and underscores the need to comprehend its variability across different environments for accurate assessment of climate change.
语种英语
WOS研究方向Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS类目Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS记录号WOS:001195885700001
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/306088
作者单位University of California System; University of California Davis; University of California System; University of California Davis; United States Department of Energy (DOE); Los Alamos National Laboratory; University of Toronto; Environment & Climate Change Canada; University of California System; University of California Davis
推荐引用方式
GB/T 7714		 . Chemical properties and single-particle mixing state of soot aerosol in Houston during the TRACER campaign[J],2024,24(7).
APA (2024).Chemical properties and single-particle mixing state of soot aerosol in Houston during the TRACER campaign.ATMOSPHERIC CHEMISTRY AND PHYSICS,24(7).
MLA "Chemical properties and single-particle mixing state of soot aerosol in Houston during the TRACER campaign".ATMOSPHERIC CHEMISTRY AND PHYSICS 24.7(2024).
条目包含的文件
条目无相关文件。
个性服务
推荐该条目
保存到收藏夹
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
百度学术
百度学术中相似的文章
必应学术
必应学术中相似的文章
相关权益政策
暂无数据
收藏/分享

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。