Organic and Elemental Carbon in the Urban Background in an Eastern Mediterranean City DOI Creative Commons
Tareq Hussein, Xinyang Li, Zaid Bakri

et al.

Atmosphere, Journal Year: 2022, Volume and Issue: 13(2), P. 197 - 197

Published: Jan. 26, 2022

The Mediterranean region is an important area for air pollution as it the crossroads between three continents; therefore, concentrations of atmospheric aerosol particles are influenced by emissions from Africa, Asia, and Europe. Here we concentrate on eleven-month time series ambient concentration organic carbon (OC) elemental (EC) May 2018–March 2019 in Amman, Jordan. Such a dataset unique results show that OC EC annual mean PM2.5 samples were 5.9 ± 2.8 µg m–3 1.7 1.1 m–3, respectively. It was found majority within fine particle fraction (PM2.5). During sand dust storm (SDS) episodes higher than means; values during these periods about 9.6 3.5 2.5 1.2 samples. Based this, SDS identified to be responsible increased carbonaceous content well PM10 content, which may have direct implications human health. This study encourages us perform more extensive measurements longer period include advanced chemical physical characterization urban aerosols atmosphere can representative other areas region.

Language: Английский

An observation-constrained estimation of brown carbon aerosol direct radiative effects DOI Creative Commons

Yueyue Cheng,

Chao Liu, Jiandong Wang

et al.

Atmospheric chemistry and physics, Journal Year: 2024, Volume and Issue: 24(5), P. 3065 - 3078

Published: March 11, 2024

Abstract. Brown carbon (BrC) is an organic component with noticeable absorption in the ultraviolet and short visible wavelengths, which influences global radiative balance. However, assessing BrC effects remains a challenging task owing to scarcity of direct observations uncertainties regarding their chemical optical properties. This study proposes efficient method for estimating based on available observational data. The light-absorbing properties obtained from aethalometer measurements separation were combined simulated determine mass concentrations. An closure was conducted constrain total other aerosol contents. Subsequently, we estimated Such state-of-the-art combination numerical models provides primary variables simulating transfer estimate effects. We used over 4 months (from 1 July 18 November 2021) Nanjing (a megacity east China) as example. During period, constituted 8.7 %–34.1 % at 370 nm. In atmosphere, plays warming role, its average instantaneous forcing (RF) standard deviation 4.0 ± 2.3 W m−2 corresponding 15 4.2 black (BC) RF. At surface, BrC-induced actinic flux (AF) attenuation comparable that caused by BC, accounting 55 BC UV range almost 20 range. photosynthetically active radiation (PAR) attenuated approximately 33.5 9.4 BC. Furthermore, quantified several microphysical These findings provide valuable insights understanding Moreover, they highlight importance necessity improved observation modeling

Language: Английский

Citations

3
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

et al.

Aerosol Research, Journal Year: 2024, Volume and Issue: 2(1), P. 107 - 122

Published: May 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

Language: Английский

Citations

3
Characteristics of Light Absorption and Environmental Effects of Brown Carbon Aerosol in Chongqing During Summer and Winter Based on Online Measurement: Implications of Secondary Formation DOI
Hong Wu, Chao Peng, Tianyu Zhai

et al.

Atmospheric Environment, Journal Year: 2024, Volume and Issue: unknown, P. 120843 - 120843

Published: Sept. 1, 2024

Language: Английский

Citations

3
Distribution characteristics and optical properties of carbonaceous aerosol: brown carbon and black carbon in Nanchang, inland China DOI
Changwei Zou, Jiayi Wang, Yan Gao

et al.

Atmospheric Pollution Research, Journal Year: 2023, Volume and Issue: 14(3), P. 101700 - 101700

Published: Feb. 27, 2023

Language: Английский

Citations

7
Organic and Elemental Carbon in the Urban Background in an Eastern Mediterranean City DOI Creative Commons
Tareq Hussein, Xinyang Li, Zaid Bakri

et al.

Atmosphere, Journal Year: 2022, Volume and Issue: 13(2), P. 197 - 197

Published: Jan. 26, 2022

The Mediterranean region is an important area for air pollution as it the crossroads between three continents; therefore, concentrations of atmospheric aerosol particles are influenced by emissions from Africa, Asia, and Europe. Here we concentrate on eleven-month time series ambient concentration organic carbon (OC) elemental (EC) May 2018–March 2019 in Amman, Jordan. Such a dataset unique results show that OC EC annual mean PM2.5 samples were 5.9 ± 2.8 µg m–3 1.7 1.1 m–3, respectively. It was found majority within fine particle fraction (PM2.5). During sand dust storm (SDS) episodes higher than means; values during these periods about 9.6 3.5 2.5 1.2 samples. Based this, SDS identified to be responsible increased carbonaceous content well PM10 content, which may have direct implications human health. This study encourages us perform more extensive measurements longer period include advanced chemical physical characterization urban aerosols atmosphere can representative other areas region.

Language: Английский

Citations

12