Spatiotemporal variation characteristics of global fires and their emissions
Intense regional fires are a common occurrence in the context of climate warming and have progressively evolved into one of the major natural disasters in terrestrial ecosystems, posing a serious hazard to the atmosphere and climate change. We investigated the spatial distribution, intensity, emissi...
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ftcopernicus:oai:publications.copernicus.org:acp108372 2023-07-30T04:07:30+02:00 Spatiotemporal variation characteristics of global fires and their emissions Fan, Hao Yang, Xingchuan Zhao, Chuanfeng Yang, Yikun Shen, Zhenyao 2023-07-14 application/pdf https://doi.org/10.5194/acp-23-7781-2023 https://acp.copernicus.org/articles/23/7781/2023/ eng eng doi:10.5194/acp-23-7781-2023 https://acp.copernicus.org/articles/23/7781/2023/ eISSN: 1680-7324 Text 2023 ftcopernicus https://doi.org/10.5194/acp-23-7781-2023 2023-07-17T16:24:17Z Intense regional fires are a common occurrence in the context of climate warming and have progressively evolved into one of the major natural disasters in terrestrial ecosystems, posing a serious hazard to the atmosphere and climate change. We investigated the spatial distribution, intensity, emission changes, and meteorological differences between fires in different fire-active and fire-prone regions globally based on multi-source satellite remote sensing fire data, emission data, and meteorological data in order to better understand the change trend of fire activity at multiple spatial and temporal scales. The findings demonstrate that while the burned area (BA) has decreased slowly over the last 20 years, the burned fraction (BF), the fire count (FC), and the fire radiative power (FRP) all exhibit pronounced regional and seasonal variations. The physical characteristics of fires, including the BF, FC, and FRP, experience greater seasonal variation as latitude increases, with summer and autumn being the seasons with the most frequent fire occurrence worldwide. This study also shows that the emissions declined substantially between 2012 and 2020 in northern Canada, Alaska, and northeastern China, whereas it notably increased in the Siberia region during the same period, primarily due to a rise in summer emissions. The results based on classification show that the difference in CO 2 produced by fires among regions is relatively small. Excluding CO 2 , aerosol emissions (the total of organic carbon (OC), total carbon (TC), black carbon (BC)) ranged from 78.6 % to 84.2 %, while the least significant air pollutants (the total of PM 2.5 , SO 2 , and NO x ) ranged from 5.8 % to 11.7 %. The abundance of vegetation predominately affects the intensity change in fire development, while the weather conditions can also indirectly influence the incidence of fire by altering the growth condition of vegetation. Correspondingly, the increase in temperature in the Northern Hemisphere's middle- and high-latitude forest regions ... Text Alaska Siberia Copernicus Publications: E-Journals Canada Atmospheric Chemistry and Physics 23 13 7781 7798 |
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English |
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Intense regional fires are a common occurrence in the context of climate warming and have progressively evolved into one of the major natural disasters in terrestrial ecosystems, posing a serious hazard to the atmosphere and climate change. We investigated the spatial distribution, intensity, emission changes, and meteorological differences between fires in different fire-active and fire-prone regions globally based on multi-source satellite remote sensing fire data, emission data, and meteorological data in order to better understand the change trend of fire activity at multiple spatial and temporal scales. The findings demonstrate that while the burned area (BA) has decreased slowly over the last 20 years, the burned fraction (BF), the fire count (FC), and the fire radiative power (FRP) all exhibit pronounced regional and seasonal variations. The physical characteristics of fires, including the BF, FC, and FRP, experience greater seasonal variation as latitude increases, with summer and autumn being the seasons with the most frequent fire occurrence worldwide. This study also shows that the emissions declined substantially between 2012 and 2020 in northern Canada, Alaska, and northeastern China, whereas it notably increased in the Siberia region during the same period, primarily due to a rise in summer emissions. The results based on classification show that the difference in CO 2 produced by fires among regions is relatively small. Excluding CO 2 , aerosol emissions (the total of organic carbon (OC), total carbon (TC), black carbon (BC)) ranged from 78.6 % to 84.2 %, while the least significant air pollutants (the total of PM 2.5 , SO 2 , and NO x ) ranged from 5.8 % to 11.7 %. The abundance of vegetation predominately affects the intensity change in fire development, while the weather conditions can also indirectly influence the incidence of fire by altering the growth condition of vegetation. Correspondingly, the increase in temperature in the Northern Hemisphere's middle- and high-latitude forest regions ... |
format |
Text |
author |
Fan, Hao Yang, Xingchuan Zhao, Chuanfeng Yang, Yikun Shen, Zhenyao |
spellingShingle |
Fan, Hao Yang, Xingchuan Zhao, Chuanfeng Yang, Yikun Shen, Zhenyao Spatiotemporal variation characteristics of global fires and their emissions |
author_facet |
Fan, Hao Yang, Xingchuan Zhao, Chuanfeng Yang, Yikun Shen, Zhenyao |
author_sort |
Fan, Hao |
title |
Spatiotemporal variation characteristics of global fires and their emissions |
title_short |
Spatiotemporal variation characteristics of global fires and their emissions |
title_full |
Spatiotemporal variation characteristics of global fires and their emissions |
title_fullStr |
Spatiotemporal variation characteristics of global fires and their emissions |
title_full_unstemmed |
Spatiotemporal variation characteristics of global fires and their emissions |
title_sort |
spatiotemporal variation characteristics of global fires and their emissions |
publishDate |
2023 |
url |
https://doi.org/10.5194/acp-23-7781-2023 https://acp.copernicus.org/articles/23/7781/2023/ |
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Canada |
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Canada |
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Alaska Siberia |
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Alaska Siberia |
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eISSN: 1680-7324 |
op_relation |
doi:10.5194/acp-23-7781-2023 https://acp.copernicus.org/articles/23/7781/2023/ |
op_doi |
https://doi.org/10.5194/acp-23-7781-2023 |
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Atmospheric Chemistry and Physics |
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23 |
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13 |
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7781 |
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7798 |
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