The water-insoluble organic carbon in PM<sub>2.5</sub> of typical Chinese urban areas: light-absorbing properties, potential sources, radiative forcing effects, and a possible light-absorbing continuum

doi:10.5194/acp-24-7755-2024

	The water-insoluble organic carbon in PM_2.5 of typical Chinese urban areas: light-absorbing properties, potential sources, radiative forcing effects, and a possible light-absorbing continuum
	Mo, Yangzhi 1,2,3,4; Li, Jun 1,2,3,4; Zhong, Guangcai 1,2,3,4; Zhu, Sanyuan 1,2,3,4; Zhao, Shizhen 1,2,3,4; Tang, Jiao 1,2,3,4; Jiang, Hongxing 5; Cheng, Zhineng 1,2,3,4; Tian, Chongguo6 ; Chen, Yingjun 5; Zhang, Gan 1,2,3,4
发表期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
ISSN	1680-7316
	2024-07-09
卷号	24 期号:13 页码:7755-7772
DOI	10.5194/acp-24-7755-2024
通讯作者	Zhang, Gan([email protected])
英文摘要	Water-insoluble organic carbon (WIOC) constitutes a substantial portion of organic carbon (OC) and contributes significantly to light absorption by brown carbon (BrC), playing pivotal roles in climate forcing. China is a hotspot region with high levels of OC and BrC, but information regarding the sources and light-absorbing properties of WIOC on a national scale remains scarce. Here, we investigated the light-absorbing properties and sources of WIOC in 10 representative urban cities in China. On average, WIOC made up 33.4 +/- 7.66 % and 40.5 +/- 9.73 % of concentrations and light absorption at 365 nm (Abs(365)) of extractable OC (EX-OC), which includes relatively hydrophobic OC (WIOC and humic-like substances, HULIS-C) and hydrophilic OC (non-humic-like substances, non-HULIS-C). The mass absorption efficiency of WIOC at 365 nm (MAE(365)) was (1.59 +/- 0.55 m(2) (g C)(-1)) comparable to that of HULIS (1.54 +/- 0.57 m(2) (g C)(-1)) but significantly higher than non-HULIS (0.71 +/- 0.28 m(2) (g C)(-1)), indicating that hydrophobic OC possesses a stronger light-absorbing capacity than hydrophilic OC. Biomass burning (31.0 %) and coal combustion (31.1 %) were the dominant sources of WIOC, with coal combustion sources exhibiting the strongest light-absorbing capacity. Moreover, employing the simple forcing efficiency (SFE300-700 nm) method, we observed that WIOC exhibited the highest SFE300-700 nm (6.57 +/- 5.37 W g(-1)) among the EX-OC fractions. The radiative forcing of EX-OC was predominantly contributed by hydrophobic OC (WIOC - 39.4 +/- 15.5 % and HULIS - 39.5 +/- 12.1 %). Considering the aromaticity, sources, and atmospheric processes of different carbonaceous components, we propose a light-absorbing carbonaceous continuum, revealing that components enriched with fossil sources tend to possess stronger light-absorbing capacity, higher aromatic levels, increased molecular weights, and greater recalcitrance in the atmosphere. Reducing fossil fuel emissions emerges as an effective means of mitigating both gaseous (CO2) and particulate light-absorbing carbonaceous warming components.
资助机构	Natural Science Foundation of China (NSFC) ; Alliance of International Science Organizations ; Guangdong Basic and Applied Basic Research Foundation ; China Scholarship Council
收录类别	SCI
语种	英语
关键词[WOS]	HUMIC-LIKE SUBSTANCES ; BROWN CARBON ; OPTICAL-PROPERTIES ; BLACK CARBON ; ABSORPTION CHARACTERISTICS ; ATMOSPHERIC AEROSOLS ; BIOMASS ; COMBUSTION ; COMPONENTS ; EXTRACTS
研究领域[WOS]	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:001265480300001
引用统计
文献类型	期刊论文
条目标识符	http://ir.yic.ac.cn/handle/133337/35871
专题	中国科学院海岸带环境过程与生态修复重点实验室中国科学院海岸带环境过程与生态修复重点实验室_海岸带环境过程实验室
通讯作者	Zhang, Gan
作者单位	1.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Organ Geochem, Guangzhou 510640, Peoples R China 2.Chinese Acad Sci, Guangzhou Inst Geochem, Guangdong Prov Key Lab Environm Protect, Guangzhou 510640, Peoples R China 3.Chinese Acad Sci, Guangzhou Inst Geochem, Guangdong Hong Kong Macao Joint Lab Environm Pollu, Guangzhou 510640, Peoples R China 4.CAS Ctr Excellence Deep Earth Sci, Guangzhou 510640, Peoples R China 5.Fudan Univ, Dept Environm Sci & Engn, Shanghai Key Lab Atmospher Particle Pollut & Preve, Shanghai 200438, Peoples R China 6.Chinese Acad Sci, Yantai Inst Coastal Zone Res, Key Lab Coastal Environm Proc & Ecol Remediat, Yantai 264003, Peoples R China
推荐引用方式 GB/T 7714	Mo, Yangzhi,Li, Jun,Zhong, Guangcai,et al. The water-insoluble organic carbon in PM_2.5 of typical Chinese urban areas: light-absorbing properties, potential sources, radiative forcing effects, and a possible light-absorbing continuum[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2024,24(13):7755-7772.
APA	Mo, Yangzhi.,Li, Jun.,Zhong, Guangcai.,Zhu, Sanyuan.,Zhao, Shizhen.,...&Zhang, Gan.(2024).The water-insoluble organic carbon in PM_2.5 of typical Chinese urban areas: light-absorbing properties, potential sources, radiative forcing effects, and a possible light-absorbing continuum.ATMOSPHERIC CHEMISTRY AND PHYSICS,24(13),7755-7772.
MLA	Mo, Yangzhi,et al."The water-insoluble organic carbon in PM_2.5 of typical Chinese urban areas: light-absorbing properties, potential sources, radiative forcing effects, and a possible light-absorbing continuum".ATMOSPHERIC CHEMISTRY AND PHYSICS 24.13(2024):7755-7772.