Long-term observations of black carbon and carbon monoxide in the Poker Flat Research Range, central Alaska, with a focus on forest wildfire emissions
Forest wildfires in interior Alaska represent an important black carbon (BC) source for the Arctic and sub-Arctic. However, BC observations in interior Alaska have not been sufficient to constrain the range of existing emissions. Here, we show our observations of BC mass concentrations and carbon mo...
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ftcopernicus:oai:publications.copernicus.org:egusphere116122 2024-01-21T10:03:27+01:00 Long-term observations of black carbon and carbon monoxide in the Poker Flat Research Range, central Alaska, with a focus on forest wildfire emissions Kinase, Takeshi Taketani, Fumikazu Takigawa, Masayuki Zhu, Chunmao Kim, Yongwon Mordovskoi, Petr Kanaya, Yugo 2023-12-21 application/pdf https://doi.org/10.5194/egusphere-2023-2764 https://egusphere.copernicus.org/preprints/2023/egusphere-2023-2764/ eng eng doi:10.5194/egusphere-2023-2764 https://egusphere.copernicus.org/preprints/2023/egusphere-2023-2764/ eISSN: Text 2023 ftcopernicus https://doi.org/10.5194/egusphere-2023-2764 2023-12-25T17:24:15Z Forest wildfires in interior Alaska represent an important black carbon (BC) source for the Arctic and sub-Arctic. However, BC observations in interior Alaska have not been sufficient to constrain the range of existing emissions. Here, we show our observations of BC mass concentrations and carbon monoxide (CO) mixing ratios in the Poker Flat Research Range (65.12° N, 147.43° W), located in central Alaska, since April 2016. The medians of the hourly BC mass concentration and CO mixing ratio throughout the observation period were 13 ng m -3 and 124.7 ppb, respectively. Significant peaks in the BC mass concentration and CO mixing ratio were observed at the same time, indicating influences from common sources. These BC peaks coincided with peaks at other comparative sites in Alaska, indicating large BC emissions in interior Alaska. Source estimation by FLEXPART-WRF confirmed a contribution of forest wildfires in Alaska when high BC mass concentrations were observed. For these cases, we found a positive correlation ( r = 0.44) between the observed BC/∆CO ratio and fire radiative power (FRP) observed in Alaska and Canada. This finding indicates that the BC and CO emission ratio is controlled by the intensity and time progress of forest wildfires and suggests the BC emission factor or/and inventory could be potentially improved by FRP. We recommend that FRP be integrated into future bottom-up emission inventories to achieve a better understanding of the dynamics of pollutants from frequently occurred forest wildfires under the rapidly changing climate in the Arctic. Text Arctic black carbon Alaska Copernicus Publications: E-Journals Arctic Canada |
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Copernicus Publications: E-Journals |
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English |
description |
Forest wildfires in interior Alaska represent an important black carbon (BC) source for the Arctic and sub-Arctic. However, BC observations in interior Alaska have not been sufficient to constrain the range of existing emissions. Here, we show our observations of BC mass concentrations and carbon monoxide (CO) mixing ratios in the Poker Flat Research Range (65.12° N, 147.43° W), located in central Alaska, since April 2016. The medians of the hourly BC mass concentration and CO mixing ratio throughout the observation period were 13 ng m -3 and 124.7 ppb, respectively. Significant peaks in the BC mass concentration and CO mixing ratio were observed at the same time, indicating influences from common sources. These BC peaks coincided with peaks at other comparative sites in Alaska, indicating large BC emissions in interior Alaska. Source estimation by FLEXPART-WRF confirmed a contribution of forest wildfires in Alaska when high BC mass concentrations were observed. For these cases, we found a positive correlation ( r = 0.44) between the observed BC/∆CO ratio and fire radiative power (FRP) observed in Alaska and Canada. This finding indicates that the BC and CO emission ratio is controlled by the intensity and time progress of forest wildfires and suggests the BC emission factor or/and inventory could be potentially improved by FRP. We recommend that FRP be integrated into future bottom-up emission inventories to achieve a better understanding of the dynamics of pollutants from frequently occurred forest wildfires under the rapidly changing climate in the Arctic. |
format |
Text |
author |
Kinase, Takeshi Taketani, Fumikazu Takigawa, Masayuki Zhu, Chunmao Kim, Yongwon Mordovskoi, Petr Kanaya, Yugo |
spellingShingle |
Kinase, Takeshi Taketani, Fumikazu Takigawa, Masayuki Zhu, Chunmao Kim, Yongwon Mordovskoi, Petr Kanaya, Yugo Long-term observations of black carbon and carbon monoxide in the Poker Flat Research Range, central Alaska, with a focus on forest wildfire emissions |
author_facet |
Kinase, Takeshi Taketani, Fumikazu Takigawa, Masayuki Zhu, Chunmao Kim, Yongwon Mordovskoi, Petr Kanaya, Yugo |
author_sort |
Kinase, Takeshi |
title |
Long-term observations of black carbon and carbon monoxide in the Poker Flat Research Range, central Alaska, with a focus on forest wildfire emissions |
title_short |
Long-term observations of black carbon and carbon monoxide in the Poker Flat Research Range, central Alaska, with a focus on forest wildfire emissions |
title_full |
Long-term observations of black carbon and carbon monoxide in the Poker Flat Research Range, central Alaska, with a focus on forest wildfire emissions |
title_fullStr |
Long-term observations of black carbon and carbon monoxide in the Poker Flat Research Range, central Alaska, with a focus on forest wildfire emissions |
title_full_unstemmed |
Long-term observations of black carbon and carbon monoxide in the Poker Flat Research Range, central Alaska, with a focus on forest wildfire emissions |
title_sort |
long-term observations of black carbon and carbon monoxide in the poker flat research range, central alaska, with a focus on forest wildfire emissions |
publishDate |
2023 |
url |
https://doi.org/10.5194/egusphere-2023-2764 https://egusphere.copernicus.org/preprints/2023/egusphere-2023-2764/ |
geographic |
Arctic Canada |
geographic_facet |
Arctic Canada |
genre |
Arctic black carbon Alaska |
genre_facet |
Arctic black carbon Alaska |
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eISSN: |
op_relation |
doi:10.5194/egusphere-2023-2764 https://egusphere.copernicus.org/preprints/2023/egusphere-2023-2764/ |
op_doi |
https://doi.org/10.5194/egusphere-2023-2764 |
_version_ |
1788693726114086912 |