Comment on egusphere-2024-879 DOI Creative Commons
Jyhpyng Wang, Jiaping Wang, Yuxuan Zhang

и другие.

Опубликована: Май 6, 2024

Abstract. Black carbon (BC) in the Tibetan Plateau (TP) region has distinct climate effect, which strongly depends on its mixing state. The aging processes of BC TP are subject to emissions from various regions, resulting considerable variability state and physicochemical properties. However, mechanism magnitude this effect not yet clear. In study, filed observations properties BC-containing particles (PMBC) were conducted northeast (Xihai) southeast (Lulang) regions investigate impacts transported lower-altitude areas characteristics TP. Large spatial discrepancies found chemical composition PMBC. Both sites showed higher concentrations PMBC when they affected by airmasses outside TP, but with diverse composition. Source apportionment for organic aerosol (OA) suggested that primary OA northeastern was attributed hydrocarbon (HOA) anthropogenic emissions, while it dominated biomass burning (BBOA) southeastern Regarding secondary aerosol, a marked enhancement nitrate fraction observed aged coating Xihai brought updrafts easterly winds areas. With development boundary layer, enhanced turbulent promoted elevation pollutants. contrast Xihai, thickly coated Lulang mainly caused self-elevated plume South Asia, showing large contribution (SOA). lead substantial variations both light absorption ability across thicker mass cross-section (MAC) elevated reveals their These findings emphasize vulnerability plateau influences leading significant changes concentration, states needs be considered evaluation radiative effects region.

Язык: Английский

Reply on RC2 DOI Creative Commons

Jiaping Wang

Опубликована: Июнь 19, 2024

Abstract. Black carbon (BC) in the Tibetan Plateau (TP) region has distinct climate effect, which strongly depends on its mixing state. The aging processes of BC TP are subject to emissions from various regions, resulting considerable variability state and physicochemical properties. However, mechanism magnitude this effect not yet clear. In study, filed observations properties BC-containing particles (PMBC) were conducted northeast (Xihai) southeast (Lulang) regions investigate impacts transported lower-altitude areas characteristics TP. Large spatial discrepancies found chemical composition PMBC. Both sites showed higher concentrations PMBC when they affected by airmasses outside TP, but with diverse composition. Source apportionment for organic aerosol (OA) suggested that primary OA northeastern was attributed hydrocarbon (HOA) anthropogenic emissions, while it dominated biomass burning (BBOA) southeastern Regarding secondary aerosol, a marked enhancement nitrate fraction observed aged coating Xihai brought updrafts easterly winds areas. With development boundary layer, enhanced turbulent promoted elevation pollutants. contrast Xihai, thickly coated Lulang mainly caused self-elevated plume South Asia, showing large contribution (SOA). lead substantial variations both light absorption ability across thicker mass cross-section (MAC) elevated reveals their These findings emphasize vulnerability plateau influences leading significant changes concentration, states needs be considered evaluation radiative effects region.

Язык: Английский

Процитировано

0
A Novel Approach to Assessing Light Extinction with Decade-Long Observations of Chemical and Optical Properties in Seoul, South Korea DOI Creative Commons
Seung-Myung Park, Jong Sung Park,

In-Ho Song

и другие.

Atmosphere, Год журнала: 2024, Номер 15(3), С. 320 - 320

Опубликована: Март 4, 2024

We performed continuous long-term measurements of PM2.5 mass, comprehensive chemical composition, and optical properties, including scattering absorption coefficients, from March 2011 to December 2020 at the Metropolitan Air Quality Research Center in Seoul, South Korea. peaked 38 μg/m3 2013 has been declining steadily since then, reaching 22 2020. The extinction coefficients also decreased with decline PM2.5, but correlation between two factors was not as pronounced. This deviation mainly attributed rapid changes composition over same period. mass contribution sulphate 33.9 24.1%, fraction nitrate organic carbon increased 23.4 20.0 34.1 32.2%, respectively, indicating that replaced by past decade. To assess effect changing aerosol compositions on light extinction, we compared measured those estimated via various existing approaches, revised IMPROVE algorithm. found simplified linear regression model provided best fit our data, a slope 1.03 R2 0.87, all non-linear methods, such algorithms, overestimated observed 23 48%. suggests simple scheme may be more appropriate for reflecting varying conditions long periods time, especially urban air. However, where does change much, methods are likely reproducing extinction.

Язык: Английский

Процитировано

0
Impacts of elevated anthropogenic emissions on physicochemical characteristics of BC-containing particles over the Tibetan Plateau DOI Creative Commons
Jinbo Wang, Jiaping Wang, Yuxuan Zhang

и другие.

Опубликована: Апрель 8, 2024

Abstract. Black carbon (BC) in the Tibetan Plateau (TP) region has distinct climate effect, which strongly depends on its mixing state. The aging processes of BC TP are subject to emissions from various regions, resulting considerable variability state and physicochemical properties. However, mechanism magnitude this effect not yet clear. In study, filed observations properties BC-containing particles (PMBC) were conducted northeast (Xihai) southeast (Lulang) regions investigate impacts transported lower-altitude areas characteristics TP. Large spatial discrepancies found chemical composition PMBC. Both sites showed higher concentrations PMBC when they affected by airmasses outside TP, but with diverse composition. Source apportionment for organic aerosol (OA) suggested that primary OA northeastern was attributed hydrocarbon (HOA) anthropogenic emissions, while it dominated biomass burning (BBOA) southeastern Regarding secondary aerosol, a marked enhancement nitrate fraction observed aged coating Xihai brought updrafts easterly winds areas. With development boundary layer, enhanced turbulent promoted elevation pollutants. contrast Xihai, thickly coated Lulang mainly caused self-elevated plume South Asia, showing large contribution (SOA). lead substantial variations both light absorption ability across thicker mass cross-section (MAC) elevated reveals their These findings emphasize vulnerability plateau influences leading significant changes concentration, states needs be considered evaluation radiative effects region.

Язык: Английский

Процитировано

0
Comment on egusphere-2024-879 DOI Creative Commons
Jyhpyng Wang, Jiaping Wang, Yuxuan Zhang

и другие.

Опубликована: Май 3, 2024

Abstract. Black carbon (BC) in the Tibetan Plateau (TP) region has distinct climate effect, which strongly depends on its mixing state. The aging processes of BC TP are subject to emissions from various regions, resulting considerable variability state and physicochemical properties. However, mechanism magnitude this effect not yet clear. In study, filed observations properties BC-containing particles (PMBC) were conducted northeast (Xihai) southeast (Lulang) regions investigate impacts transported lower-altitude areas characteristics TP. Large spatial discrepancies found chemical composition PMBC. Both sites showed higher concentrations PMBC when they affected by airmasses outside TP, but with diverse composition. Source apportionment for organic aerosol (OA) suggested that primary OA northeastern was attributed hydrocarbon (HOA) anthropogenic emissions, while it dominated biomass burning (BBOA) southeastern Regarding secondary aerosol, a marked enhancement nitrate fraction observed aged coating Xihai brought updrafts easterly winds areas. With development boundary layer, enhanced turbulent promoted elevation pollutants. contrast Xihai, thickly coated Lulang mainly caused self-elevated plume South Asia, showing large contribution (SOA). lead substantial variations both light absorption ability across thicker mass cross-section (MAC) elevated reveals their These findings emphasize vulnerability plateau influences leading significant changes concentration, states needs be considered evaluation radiative effects region.

Язык: Английский

Процитировано

0
Comment on egusphere-2024-879 DOI Creative Commons
Jyhpyng Wang, Jiaping Wang, Yuxuan Zhang

и другие.

Опубликована: Май 6, 2024

Abstract. Black carbon (BC) in the Tibetan Plateau (TP) region has distinct climate effect, which strongly depends on its mixing state. The aging processes of BC TP are subject to emissions from various regions, resulting considerable variability state and physicochemical properties. However, mechanism magnitude this effect not yet clear. In study, filed observations properties BC-containing particles (PMBC) were conducted northeast (Xihai) southeast (Lulang) regions investigate impacts transported lower-altitude areas characteristics TP. Large spatial discrepancies found chemical composition PMBC. Both sites showed higher concentrations PMBC when they affected by airmasses outside TP, but with diverse composition. Source apportionment for organic aerosol (OA) suggested that primary OA northeastern was attributed hydrocarbon (HOA) anthropogenic emissions, while it dominated biomass burning (BBOA) southeastern Regarding secondary aerosol, a marked enhancement nitrate fraction observed aged coating Xihai brought updrafts easterly winds areas. With development boundary layer, enhanced turbulent promoted elevation pollutants. contrast Xihai, thickly coated Lulang mainly caused self-elevated plume South Asia, showing large contribution (SOA). lead substantial variations both light absorption ability across thicker mass cross-section (MAC) elevated reveals their These findings emphasize vulnerability plateau influences leading significant changes concentration, states needs be considered evaluation radiative effects region.

Язык: Английский

Процитировано

0