High-resolution analyses of concentrations and sizes of refractory black carbon particles deposited in northwestern Greenland over the past 350 years – Part 2: Seasonal and temporal trends in refractory black carbon originated from fossil fuel combustion and biomass burning DOI Creative Commons
Kumiko Goto‐Azuma,

Yoshimi Ogawa‐Tsukagawa,

Kaori Fukuda

et al.

Atmospheric chemistry and physics, Journal Year: 2025, Volume and Issue: 25(1), P. 657 - 683

Published: Jan. 17, 2025

Abstract. The roles and impacts of refractory black carbon (rBC), an important aerosol species affecting Earth's radiation budget, are not well understood owing to a lack accurate long-term observations. To study the temporal changes in rBC since pre-industrial period, we analyzed ice core drilled northwestern Greenland. Using improved technique for measurement continuous flow analysis (CFA) system, obtained high-temporal-resolution records particle size mass/number concentrations past 350 years. Number mass concentrations, which both started increase 1870s associated with inflow anthropogenically derived rBC, reached their maxima 1910s–1920s then subsequently decreased. Backward-trajectory analyses suggest that North America was likely dominant source region anthropogenic core. shifted annual concentration peaks from summer winter–early spring. After diminished levels, peak returned summer. We found particles were larger than biomass burning particles. By separating winter summer, reconstructed variations originated burning, including period large input. showed no trend until early 2000s. Finally, possible albedo reductions due discussed. Our new data provide key information validating climate models, thereby supporting projections future environment.

Language: Английский

High-resolution analyses of concentrations and sizes of refractory black carbon particles deposited in northwestern Greenland over the past 350 years – Part 2: Seasonal and temporal trends in refractory black carbon originated from fossil fuel combustion and biomass burning DOI Creative Commons
Kumiko Goto‐Azuma,

Yoshimi Ogawa‐Tsukagawa,

Kaori Fukuda

et al.

Atmospheric chemistry and physics, Journal Year: 2025, Volume and Issue: 25(1), P. 657 - 683

Published: Jan. 17, 2025

Abstract. The roles and impacts of refractory black carbon (rBC), an important aerosol species affecting Earth's radiation budget, are not well understood owing to a lack accurate long-term observations. To study the temporal changes in rBC since pre-industrial period, we analyzed ice core drilled northwestern Greenland. Using improved technique for measurement continuous flow analysis (CFA) system, obtained high-temporal-resolution records particle size mass/number concentrations past 350 years. Number mass concentrations, which both started increase 1870s associated with inflow anthropogenically derived rBC, reached their maxima 1910s–1920s then subsequently decreased. Backward-trajectory analyses suggest that North America was likely dominant source region anthropogenic core. shifted annual concentration peaks from summer winter–early spring. After diminished levels, peak returned summer. We found particles were larger than biomass burning particles. By separating winter summer, reconstructed variations originated burning, including period large input. showed no trend until early 2000s. Finally, possible albedo reductions due discussed. Our new data provide key information validating climate models, thereby supporting projections future environment.

Language: Английский

Citations

0