New Analytical Paradigm to Determine Concentration of Brown Carbon and Its Sample-by-Sample Mass Absorption Efficiency DOI
Kezheng Liao, Yuk Ying Cheng,

Sui Shing Yea

et al.

Environmental Science & Technology, Journal Year: 2024, Volume and Issue: 58(39), P. 17386 - 17395

Published: Sept. 19, 2024

Brown carbon (BrC) has a substantial direct radiative effect, but current estimates of its impact on balance are highly uncertain due to lack measurements light-absorbing properties, such as mass absorption efficiency (MAE). Here, we present new analytical paradigm based Bayesian inference (BI) model that takes multiwavelength aethalometer and total data resolve the concentrations black BrC, MAEs BrC sample-by-sample basis. Hourly MAEs, unattainable in previous studies, can now be calculated, enabling first-time observation darkening-bleaching dynamics response photochemical transformation. We demonstrate application this BI analyze collected over one year (2021-2022) Hong Kong. Diel variations MAE

Language: Английский

Characterizing Aerosol Optical Properties and Direct Radiative Effects From the Perspective of Components: A Synergy Retrieval Study Based on Sun Photometer and Lidar in Central China DOI Creative Commons
Shikuan Jin, Yingying Ma, Hui Li

et al.

Geophysical Research Letters, Journal Year: 2025, Volume and Issue: 52(4)

Published: Feb. 12, 2025

Abstract Exploring various properties of aerosols can help to better understand global climate changes, emissions, and environment. In this study, a synergy observation experiment from sun photometer Lidar was carried out reveal aerosol optical direct radiative effect (DARE) in Central China the novel perspective components. Our results showed that annual mass concentration black carbon (BC) low (2.49 mg/m 2 ), but having large heating with DARE 9.27 W/m at top atmosphere. The brown found highest summer (0.52 ) its 0.10 , close average China. Additionally, retrieved columnar BC had same magnitude MEERA‐2 product, surface ( R = 0.56) because considering vertical profiles. This study significance exploring expanded information observations.

Language: Английский

Citations

1
Rapid Nighttime Darkening of Biomass Burning Brown Carbon by Nitrate Radicals Is Suppressed by Prior Daytime Photochemical Aging DOI
Carolyn Liu-Kang, Laura-Hélèna Rivellini, Xinke Wang

et al.

ACS Earth and Space Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: April 12, 2025

Language: Английский

Citations

0
New Analytical Paradigm to Determine Concentration of Brown Carbon and Its Sample-by-Sample Mass Absorption Efficiency DOI
Kezheng Liao, Yuk Ying Cheng,

Sui Shing Yea

et al.

Environmental Science & Technology, Journal Year: 2024, Volume and Issue: 58(39), P. 17386 - 17395

Published: Sept. 19, 2024

Brown carbon (BrC) has a substantial direct radiative effect, but current estimates of its impact on balance are highly uncertain due to lack measurements light-absorbing properties, such as mass absorption efficiency (MAE). Here, we present new analytical paradigm based Bayesian inference (BI) model that takes multiwavelength aethalometer and total data resolve the concentrations black BrC, MAEs BrC sample-by-sample basis. Hourly MAEs, unattainable in previous studies, can now be calculated, enabling first-time observation darkening-bleaching dynamics response photochemical transformation. We demonstrate application this BI analyze collected over one year (2021-2022) Hong Kong. Diel variations MAE

Language: Английский

Citations

1