High-resolution analyses of concentrations and sizes of black carbon particles deposited on northwest Greenland over the past 350 years – Part 2: Seasonal and temporal trends in black carbon originated from fossil fuel combustion and biomass burning
The roles and impacts of black carbon (BC), an important aerosol species affecting Earth’s radiation budget, are not well understood owing to lack of accurate long-term observations. To study the temporal changes in BC since the pre-industrial period, we analysed BC in an ice core drilled...
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ftcopernicus:oai:publications.copernicus.org:egusphere120374 2024-09-09T19:43:12+00:00 High-resolution analyses of concentrations and sizes of black carbon particles deposited on northwest Greenland over the past 350 years – Part 2: Seasonal and temporal trends in black carbon originated from fossil fuel combustion and biomass burning Goto-Azuma, Kumiko Ogawa-Tsukagawa, Yoshimi Fukuda, Kaori Fujita, Koji Hirabayashi, Motohiro Dallmayr, Remi Ogata, Jun Moteki, Nobuhiro Mori, Tatsuhiro Ohata, Sho Kondo, Yutaka Koike, Makoto Matoba, Sumito Aoki, Teruo 2024-05-23 application/pdf https://doi.org/10.5194/egusphere-2024-1498 https://egusphere.copernicus.org/preprints/2024/egusphere-2024-1498/ eng eng doi:10.5194/egusphere-2024-1498 https://egusphere.copernicus.org/preprints/2024/egusphere-2024-1498/ eISSN: Text 2024 ftcopernicus https://doi.org/10.5194/egusphere-2024-1498 2024-08-28T05:24:15Z The roles and impacts of black carbon (BC), an important aerosol species affecting Earth’s radiation budget, are not well understood owing to lack of accurate long-term observations. To study the temporal changes in BC since the pre-industrial period, we analysed BC in an ice core drilled in northwest Greenland. Using an improved technique for BC measurement and a continuous flow analysis system, we obtained accurate and high temporal resolution records of BC particle size and mass/number concentrations for the past 350 years. Number and mass concentrations, which both started to increase in the 1870s associated with inflow of anthropogenically derived BC, reached their maxima in the 1910s–1920s and then subsequently decreased. On the basis of backward trajectory analyses, we found that North America was the dominant source region of the anthropogenic BC in the ice core. The increase in anthropogenic BC shifted the annual concentration peaks of BC from summer to winter–early spring. After BC concentrations diminished to pre-industrial levels, the annual peak concentration of BC returned to the summer. We found that anthropogenic BC particles were larger than biomass burning BC particles. By separating the BC in winter and summer, we reconstructed the temporal variations in BC that originated from biomass burning, including the period with large anthropogenic input. The BC that originated from biomass burning showed no trend of increase until the early 2000s. Finally, possible albedo reductions due to BC are discussed. Our new data provide key information for validating aerosol and climate models, thereby supporting improved projections of future climate and environment. Text Greenland ice core Copernicus Publications: E-Journals Greenland |
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Copernicus Publications: E-Journals |
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ftcopernicus |
language |
English |
description |
The roles and impacts of black carbon (BC), an important aerosol species affecting Earth’s radiation budget, are not well understood owing to lack of accurate long-term observations. To study the temporal changes in BC since the pre-industrial period, we analysed BC in an ice core drilled in northwest Greenland. Using an improved technique for BC measurement and a continuous flow analysis system, we obtained accurate and high temporal resolution records of BC particle size and mass/number concentrations for the past 350 years. Number and mass concentrations, which both started to increase in the 1870s associated with inflow of anthropogenically derived BC, reached their maxima in the 1910s–1920s and then subsequently decreased. On the basis of backward trajectory analyses, we found that North America was the dominant source region of the anthropogenic BC in the ice core. The increase in anthropogenic BC shifted the annual concentration peaks of BC from summer to winter–early spring. After BC concentrations diminished to pre-industrial levels, the annual peak concentration of BC returned to the summer. We found that anthropogenic BC particles were larger than biomass burning BC particles. By separating the BC in winter and summer, we reconstructed the temporal variations in BC that originated from biomass burning, including the period with large anthropogenic input. The BC that originated from biomass burning showed no trend of increase until the early 2000s. Finally, possible albedo reductions due to BC are discussed. Our new data provide key information for validating aerosol and climate models, thereby supporting improved projections of future climate and environment. |
format |
Text |
author |
Goto-Azuma, Kumiko Ogawa-Tsukagawa, Yoshimi Fukuda, Kaori Fujita, Koji Hirabayashi, Motohiro Dallmayr, Remi Ogata, Jun Moteki, Nobuhiro Mori, Tatsuhiro Ohata, Sho Kondo, Yutaka Koike, Makoto Matoba, Sumito Aoki, Teruo |
spellingShingle |
Goto-Azuma, Kumiko Ogawa-Tsukagawa, Yoshimi Fukuda, Kaori Fujita, Koji Hirabayashi, Motohiro Dallmayr, Remi Ogata, Jun Moteki, Nobuhiro Mori, Tatsuhiro Ohata, Sho Kondo, Yutaka Koike, Makoto Matoba, Sumito Aoki, Teruo High-resolution analyses of concentrations and sizes of black carbon particles deposited on northwest Greenland over the past 350 years – Part 2: Seasonal and temporal trends in black carbon originated from fossil fuel combustion and biomass burning |
author_facet |
Goto-Azuma, Kumiko Ogawa-Tsukagawa, Yoshimi Fukuda, Kaori Fujita, Koji Hirabayashi, Motohiro Dallmayr, Remi Ogata, Jun Moteki, Nobuhiro Mori, Tatsuhiro Ohata, Sho Kondo, Yutaka Koike, Makoto Matoba, Sumito Aoki, Teruo |
author_sort |
Goto-Azuma, Kumiko |
title |
High-resolution analyses of concentrations and sizes of black carbon particles deposited on northwest Greenland over the past 350 years – Part 2: Seasonal and temporal trends in black carbon originated from fossil fuel combustion and biomass burning |
title_short |
High-resolution analyses of concentrations and sizes of black carbon particles deposited on northwest Greenland over the past 350 years – Part 2: Seasonal and temporal trends in black carbon originated from fossil fuel combustion and biomass burning |
title_full |
High-resolution analyses of concentrations and sizes of black carbon particles deposited on northwest Greenland over the past 350 years – Part 2: Seasonal and temporal trends in black carbon originated from fossil fuel combustion and biomass burning |
title_fullStr |
High-resolution analyses of concentrations and sizes of black carbon particles deposited on northwest Greenland over the past 350 years – Part 2: Seasonal and temporal trends in black carbon originated from fossil fuel combustion and biomass burning |
title_full_unstemmed |
High-resolution analyses of concentrations and sizes of black carbon particles deposited on northwest Greenland over the past 350 years – Part 2: Seasonal and temporal trends in black carbon originated from fossil fuel combustion and biomass burning |
title_sort |
high-resolution analyses of concentrations and sizes of black carbon particles deposited on northwest greenland over the past 350 years – part 2: seasonal and temporal trends in black carbon originated from fossil fuel combustion and biomass burning |
publishDate |
2024 |
url |
https://doi.org/10.5194/egusphere-2024-1498 https://egusphere.copernicus.org/preprints/2024/egusphere-2024-1498/ |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland ice core |
genre_facet |
Greenland ice core |
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eISSN: |
op_relation |
doi:10.5194/egusphere-2024-1498 https://egusphere.copernicus.org/preprints/2024/egusphere-2024-1498/ |
op_doi |
https://doi.org/10.5194/egusphere-2024-1498 |
_version_ |
1809912540912680960 |