Measurement Report: Optical and structural properties of atmospheric water-soluble organic carbon in China: Insights from multi-site spectroscopic measurements DOI Creative Commons
Haibiao Chen, Caiqing Yan,

Liubin Huang

и другие.

Опубликована: Авг. 20, 2024

Abstract. To understand the spatial variation of optical and structural properties water-soluble brown carbon its influencing factors in China, light absorption, fluorescence, Fourier transform infrared (FTIR) spectrum organic (WSOC) different regions China are measured following same analytical methods. The average absorption coefficients mass efficiencies WSOC at 365 nm (Abs365 MAE365) rank from high to low as northwest > southwest north east regional site, with higher values Northern than Southern sites, inland areas coastal areas. resolved by positive matrix factorization model combined spectra abundant aromatic O-H C=C functional groups determined FTIR both indicate that compounds important light-absorbing substances WSOC, which also have a significant impact on fluorophores. Multiple linear regression analysis shows identified fluorophores fluorescence parallel factor contribute about 62–93 % all humic-like substance (HULIS) contributes most, especially highly‑oxygenated HULIS (29 %–50 %) long emission wavelengths. Combustion source emissions atmospheric chemical processes impacts some sites. Moreover, relative humidity (RH) can affect MAE365 decreasing increase RH when < 60 remaining relatively unchanged %. Taken together, this study promotes better understanding heterogeneity their China.

Язык: Английский

New insights into the molecular characteristics-dependent light absorption variation of water-soluble organic matter in biomass burning smoke DOI
Weifeng Chen, Huiying Zhang,

Shiming Xu

и другие.

Atmospheric Research, Год журнала: 2025, Номер unknown, С. 107951 - 107951

Опубликована: Янв. 1, 2025

Язык: Английский

Процитировано

0

Measurement report: Optical and structural properties of atmospheric water-soluble organic carbon in China – insights from multi-site spectroscopic measurements DOI Creative Commons
Haibiao Chen, Caiqing Yan,

Liubin Huang

и другие.

Atmospheric chemistry and physics, Год журнала: 2025, Номер 25(6), С. 3647 - 3667

Опубликована: Март 27, 2025

Abstract. To understand the spatial variation of optical and structural properties water-soluble brown carbon its influencing factors in China, light absorption, fluorescence, Fourier transform infrared (FTIR) spectrum organic (WSOC) different regions China are measured following same analytical methods. The average absorption coefficients mass efficiencies WSOC at 365 nm (Abs365 MAE365) rank from high to low as northwest > southwest north east regional site, with higher values northern than southern sites inland areas coastal areas. resolved by spectra-based positive matrix factorization model abundance aromatic O−H C=C functional groups determined FTIR both indicate that compounds significant light-absorbing substances have a impact on fluorophores. Multiple linear regression analysis shows fluorophores identified fluorescence spectra combined parallel factor (PARAFAC) contribute about 62 %–93 % all sites, which humic-like substance (HULIS) contributes most, especially highly oxygenated HULIS (29 %–50 %) long emission wavelengths. Combustion source emissions atmospheric chemical processes impacts some sites. Moreover, relative humidity (RH) can also affect MAE365 WSOC, decreasing increase RH when RH<60 remaining relatively unchanged RH>60 %. Taken together, this study promotes better understanding heterogeneity their China.

Язык: Английский

Процитировано

0

Spatial variability of carbonaceous aerosols and absorption characteristics between urban background and residential sites during wintertime at a major Mediterranean city (Athens; Greece) DOI Creative Commons
Rafaella‐Eleni P. Sotiropoulou, Dimitris G. Kaskaoutis, Panayiotis Kalkavouras

и другие.

Atmospheric Research, Год журнала: 2025, Номер unknown, С. 108163 - 108163

Опубликована: Апрель 1, 2025

Язык: Английский

Процитировано

0

Measurement Report: Optical and structural properties of atmospheric water-soluble organic carbon in China: Insights from multi-site spectroscopic measurements DOI Creative Commons
Haibiao Chen, Caiqing Yan,

Liubin Huang

и другие.

Опубликована: Авг. 20, 2024

Abstract. To understand the spatial variation of optical and structural properties water-soluble brown carbon its influencing factors in China, light absorption, fluorescence, Fourier transform infrared (FTIR) spectrum organic (WSOC) different regions China are measured following same analytical methods. The average absorption coefficients mass efficiencies WSOC at 365 nm (Abs365 MAE365) rank from high to low as northwest > southwest north east regional site, with higher values Northern than Southern sites, inland areas coastal areas. resolved by positive matrix factorization model combined spectra abundant aromatic O-H C=C functional groups determined FTIR both indicate that compounds important light-absorbing substances WSOC, which also have a significant impact on fluorophores. Multiple linear regression analysis shows identified fluorophores fluorescence parallel factor contribute about 62–93 % all humic-like substance (HULIS) contributes most, especially highly‑oxygenated HULIS (29 %–50 %) long emission wavelengths. Combustion source emissions atmospheric chemical processes impacts some sites. Moreover, relative humidity (RH) can affect MAE365 decreasing increase RH when < 60 remaining relatively unchanged %. Taken together, this study promotes better understanding heterogeneity their China.

Язык: Английский

Процитировано

1