Comment on ar-2024-5 DOI Creative Commons
Alejandra Velazquez-Garcia, Joël Brito, Suzanne Crumeyrolle

и другие.

Опубликована: Фев. 29, 2024

Abstract. Understanding the lifecycle of light-absorbing carbonaceous aerosols, from emission to deposition, is critical for assessing their climate impact. This study integrated multi-year aerosol observations ATOLL (Lille metropolis, northern France) platform, with air mass back-trajectories and inventory as a newly developed ‘INTERPLAY’ approach. Applied Black Carbon (BC), method apportioned source contributions (shipping, vehicular, residential heating, industrial) studied aging effects, notably on Brown (BrC) component. Results estimate that throughout year, vehicular traffic dominated BC (31 %), followed by shipping (25 %, which one-third was canals/rivers) heating (21 %). Comparing INTERPLAY results aethalometer model highlights ‘residential sector’ can be entirely wood burning (BCwb), in winter, while corresponds only about 41 % fossil fuel (BCff) at site, rest being (33 %) industrial (23 emissions. Thus, BCff should not used interchangeably, particularly regions near intense maritime traffic. Concerning BrC, our analysis confirms dominant role heating. Focusing suggest considerable decrease BrC component 24 hours after emission, fresh emissions responsible 72 absorption ATOLL. Improving understanding sources dynamics aerosols crucial both abatement strategies well better assessment

Язык: Английский

Light Absorption of Black and Brown Carbon in Eastern China DOI
Rongzhi Tang,

Weizhen Cui,

Xiuli Zhang

и другие.

Journal of Hazardous Materials, Год журнала: 2025, Номер 489, С. 137530 - 137530

Опубликована: Фев. 8, 2025

Язык: Английский

Процитировано

1
Concurrent photochemical whitening and darkening of ambient brown carbon DOI Creative Commons
Qian Li, Dantong Liu, Xiaotong Jiang

и другие.

Atmospheric chemistry and physics, Год журнала: 2023, Номер 23(16), С. 9439 - 9453

Опубликована: Авг. 25, 2023

Abstract. The light-absorbing organic aerosol (OA), known as brown carbon (BrC), has important radiative impacts; however, its sources and evolution after emission remain to be elucidated. In this study, the light absorption at multiple wavelengths, mass spectra of OA microphysical properties black (BC) were characterized a typical suburban environment in Beijing. BC is constrained by size distribution mixing state, BrC obtained subtracting from total absorption. Aerosol was further apportioned BC, primary secondary applying least correlation between BC. multilinear regression analysis on factorized indicated that traffic biomass burning contributed BrC. Importantly, moderately oxygenated (O / C = 0.62) revealed highly correlate with These had higher nitrogen content, line nitrogen-containing functional groups detected Fourier transform infrared spectrometer. photochemical processes found reduce cross section (MAC) OA, reducing contribution 20 %, same time increasing MAC for which showed 30 % enhancement absorbance, implying concurrent whitening darkening This provides field evidence photochemically produced can considerably compensate some bleaching effect BrC, hereby causing impacts.

Язык: Английский

Процитировано

14
Light absorption properties and source contributions of black and brown carbon in Guangxi, southern China DOI

Benben Xu,

Meng Fan, Xiaoyan Lu

и другие.

Atmospheric Research, Год журнала: 2024, Номер 302, С. 107317 - 107317

Опубликована: Март 3, 2024

Язык: Английский

Процитировано

6
Advances in the Research on Brown Carbon Aerosols: Its Concentrations, Radiative Forcing, and Effects on Climate DOI Creative Commons
Shuai Li, Hua Zhang, Zhili Wang

и другие.

Aerosol and Air Quality Research, Год журнала: 2023, Номер 23(8), С. 220336 - 220336

Опубликована: Янв. 1, 2023

Brown carbon (BrC) are important light-absorbing carbonaceous aerosols in the atmosphere, and it is of great significance to study climate effects BrC for regional or global change. This paper reviews recent advances research on radiative forcing BrC, its temperature precipitation, snow/ice albedo. Recent suggests that: (1) Climate can be represented more accurately when including absorption models; regions with highest mean surface concentrations estimated by models mostly Southeast Asia South America (biomass burning), East northeast India (biofuel Europe North (secondary sources); estimates quite erratic, a range around 0.03–0.57 W m–2. (2) heating lead tropical expansion reduction deep convective mass fluxes upper troposphere; cloud fraction type have substantial impact rate BrC. The inclusion model results clear shift fraction, liquid water path, flux. decreases precipitation scale, particularly high intensity, but different some regions. (3) Uncertain optical properties mixing ratio radiation-absorbing snow, snow grain size coverage higher uncertainties lower confidence simulated distribution than BC. To reduce uncertainty effects, future should focus improving research, creating reliable emission inventories, taking into account photobleaching lense

Язык: Английский

Процитировано

12
The optical properties and in-situ observational evidence for the formation of brown carbon in clouds DOI Creative Commons

Ziyong Guo,

Yuxiang Yang, Xiao Hu

и другие.

Atmospheric chemistry and physics, Год журнала: 2022, Номер 22(7), С. 4827 - 4839

Опубликована: Апрель 12, 2022

Abstract. Atmospheric brown carbon (BrC) makes a substantial contribution to aerosol light absorption and thus global radiative forcing. Although BrC may change the lifetime of clouds ultimately affect precipitation, little is known regarding optical properties formation in clouds. In present study, light-absorption cloud droplet residual (cloud RES) were measured by coupled ground-based counterflow virtual impactor (GCVI) an aethalometer (AE-33), addition interstitial INT) ambient (cloud-free) particles PM2.5 inlet-AE-33 at Mt. Tianjing (1690 m a.s.l.), remote mountain site southern China, from November December 2020. Meanwhile, fluorescence water-soluble organic (WSOC) collected water samples also obtained, associated with concentration ions. The mean coefficient (Abs370) RES, INT, cloud-free 0.25 ± 0.15, 1.16 1.14, 1.47 1.23 Mm−1, respectively. Abs365 WSOC was 0.11 0.08 Mm−1 0.40 0.31 PM2.5, corresponding mass efficiency (MAE365) 0.17 0.07 0.21 m2 g−1, A comparison between RES INT particles, indicates considerable (48 %–75 %) water-insoluble total absorption. Secondary estimated minimum R squared (MRS) method dominated (67 %–85 %), rather than (11 %–16 (9 %–23 particles. It indicate secondary during processing. Supporting evidence includes enhanced dominant biomass burning factor (>80 provided positive matrix factorization (PMF) analysis. addition, we showed that closely related humic-like substances tyrosine-like and/or protein-like (r>0.63, p<0.01), whereas only for as identified excitation-emission spectroscopy.

Язык: Английский

Процитировано

16
Assessment of light-absorbing carbonaceous aerosol origins and properties at the ATOLL site in northern France DOI Creative Commons
Alejandra Velazquez-Garcia, Joël Brito, Suzanne Crumeyrolle

и другие.

Aerosol Research, Год журнала: 2024, Номер 2(1), С. 107 - 122

Опубликована: Май 28, 2024

Abstract. Understanding the lifecycle of light-absorbing carbonaceous aerosols, from emission to deposition, is critical for assessing their climate impact. This study integrated multi-year aerosol observations ATOLL (ATmospheric Observations in liLLe, northern France) platform, with air mass back trajectories and inventory as a newly developed “INTERPLAY” (IN-siTu obsERvations, hysPLit, And inventorY) approach. Applied black carbon (BC), method apportioned source contributions (shipping, vehicular, residential heating, industrial) studied aging effects, notably on brown (BrC) component. Results estimate that, throughout year, vehicular traffic dominated BC (31 %), followed by shipping (25 %, which one-third was canals/rivers) heating (21 %). Comparing INTERPLAY results aethalometer model highlights that “residential sector” can be entirely wood burning (BCwb), winter, while corresponds only about 41 % fossil fuel (BCff) at site, rest being (33 %) industrial (23 emissions. Thus, BCff should not used interchangeably, particularly regions near intense maritime traffic. Concerning BrC, our analysis confirms dominant role heating. Focusing suggest considerable decrease BrC component 24 h after emission, fresh emissions responsible 72 absorption ATOLL. The this allow an improved understanding sources atmospheric dynamics aerosols France, crucial both abatement strategies well better assessment

Язык: Английский

Процитировано

3
Estimation of light absorption by secondary brown carbon during agricultural residues burning DOI Creative Commons
Belisario Domínguez-Mancera, J.F. Nicolás, E. Mantilla

и другие.

Atmospheric Research, Год журнала: 2025, Номер unknown, С. 108239 - 108239

Опубликована: Май 1, 2025

Язык: Английский

Процитировано

0
Accurate observation of black and brown carbon in atmospheric fine particles via a versatile aerosol concentration enrichment system (VACES) DOI

Huihui Kang,

Xiaona Shang,

Munira Abdumutallip

и другие.

The Science of The Total Environment, Год журнала: 2022, Номер 837, С. 155817 - 155817

Опубликована: Май 11, 2022

Язык: Английский

Процитировано

13
Assessment of carbonaceous aerosols at Mukteshwar: A high-altitude (~2200 m amsl) background site in the foothills of the Central Himalayas DOI Creative Commons

Rahul Sheoran,

U.C. Dumka, Antti Hyvärinen

и другие.

The Science of The Total Environment, Год журнала: 2022, Номер 866, С. 161334 - 161334

Опубликована: Дек. 31, 2022

Язык: Английский

Процитировано

11
Measurement report: Brown carbon aerosol in polluted urban air of the North China Plain – day–night differences in the chromophores and optical properties DOI Creative Commons

Yuquan Gong,

Ru‐Jin Huang,

Lu Yang

и другие.

Atmospheric chemistry and physics, Год журнала: 2023, Номер 23(24), С. 15197 - 15207

Опубликована: Дек. 14, 2023

Abstract. Brown carbon (BrC) aerosol is light-absorbing organic that affects radiative forcing and atmospheric photochemistry. The BrC chromophoric composition its linkage to optical properties at the molecular level, however, are still not well characterized. In this study, we investigate day–night differences in (38 species) of water-soluble water-insoluble fractions (WS-BrC WIS-BrC) samples collected Shijiazhuang, one most polluted cities China. We found light absorption contribution WS-BrC total 365 nm was higher during day (62±8 %) than night (47±26 %), which line with difference polarity between daytime (more polar nitrated aromatics) nighttime less-polar polycyclic aromatic hydrocarbons, PAHs). high water solubility suggests enhanced secondary formation day. There a decrease mass efficiency from (2.88±0.24 vs. 2.58±0.14 for 1.43±0.83 1.02±0.49 m2 g C−1 WIS-BrC, respectively). Large hydrocarbons (PAHs) four- six-ring PAHs nitrophenols contributed 76.7 % 300–420 nighttime, while nitrocatechols two- three-ring oxygenated accounted 52.6 concentrations identified chromophores showed larger low-pollution period (day-to-night ratio 4.3) high-pollution 1.8). large absorption, therefore, should be considered when estimating sources, processes, impacts BrC.

Язык: Английский

Процитировано

6