Improved estimates of preindustrial biomass burning reduce the magnitude of aerosol climate forcing in the Southern Hemisphere
Fire plays a pivotal role in shaping terrestrial ecosystems and the chemical composition of the atmosphere and thus influences Earth’s climate. The trend and magnitude of fire activity over the past few centuries are controversial, which hinders understanding of preindustrial to present-day aerosol...
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ftpubmed:oai:pubmedcentral.nih.gov:8163089 2023-05-15T13:44:04+02:00 Improved estimates of preindustrial biomass burning reduce the magnitude of aerosol climate forcing in the Southern Hemisphere Liu, Pengfei Kaplan, Jed O. Mickley, Loretta J. Li, Yang Chellman, Nathan J. Arienzo, Monica M. Kodros, John K. Pierce, Jeffrey R. Sigl, Michael Freitag, Johannes Mulvaney, Robert Curran, Mark A. J. McConnell, Joseph R. 2021-05-28 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8163089/ http://www.ncbi.nlm.nih.gov/pubmed/34049885 https://doi.org/10.1126/sciadv.abc1379 en eng American Association for the Advancement of Science http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8163089/ http://www.ncbi.nlm.nih.gov/pubmed/34049885 http://dx.doi.org/10.1126/sciadv.abc1379 Copyright © 2021 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC). https://creativecommons.org/licenses/by-nc/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license (https://creativecommons.org/licenses/by-nc/4.0/) , which permits use, distribution, and reproduction in any medium, so long as the resultant use is not for commercial advantage and provided the original work is properly cited. CC-BY-NC Sci Adv Research Articles Text 2021 ftpubmed https://doi.org/10.1126/sciadv.abc1379 2021-06-13T00:27:18Z Fire plays a pivotal role in shaping terrestrial ecosystems and the chemical composition of the atmosphere and thus influences Earth’s climate. The trend and magnitude of fire activity over the past few centuries are controversial, which hinders understanding of preindustrial to present-day aerosol radiative forcing. Here, we present evidence from records of 14 Antarctic ice cores and 1 central Andean ice core, suggesting that historical fire activity in the Southern Hemisphere (SH) exceeded present-day levels. To understand this observation, we use a global fire model to show that overall SH fire emissions could have declined by 30% over the 20th century, possibly because of the rapid expansion of land use for agriculture and animal production in middle to high latitudes. Radiative forcing calculations suggest that the decreasing trend in SH fire emissions over the past century largely compensates for the cooling effect of increasing aerosols from fossil fuel and biofuel sources. Text Antarc* Antarctic ice core PubMed Central (PMC) Antarctic Science Advances 7 22 eabc1379 |
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Research Articles |
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Research Articles Liu, Pengfei Kaplan, Jed O. Mickley, Loretta J. Li, Yang Chellman, Nathan J. Arienzo, Monica M. Kodros, John K. Pierce, Jeffrey R. Sigl, Michael Freitag, Johannes Mulvaney, Robert Curran, Mark A. J. McConnell, Joseph R. Improved estimates of preindustrial biomass burning reduce the magnitude of aerosol climate forcing in the Southern Hemisphere |
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Research Articles |
description |
Fire plays a pivotal role in shaping terrestrial ecosystems and the chemical composition of the atmosphere and thus influences Earth’s climate. The trend and magnitude of fire activity over the past few centuries are controversial, which hinders understanding of preindustrial to present-day aerosol radiative forcing. Here, we present evidence from records of 14 Antarctic ice cores and 1 central Andean ice core, suggesting that historical fire activity in the Southern Hemisphere (SH) exceeded present-day levels. To understand this observation, we use a global fire model to show that overall SH fire emissions could have declined by 30% over the 20th century, possibly because of the rapid expansion of land use for agriculture and animal production in middle to high latitudes. Radiative forcing calculations suggest that the decreasing trend in SH fire emissions over the past century largely compensates for the cooling effect of increasing aerosols from fossil fuel and biofuel sources. |
format |
Text |
author |
Liu, Pengfei Kaplan, Jed O. Mickley, Loretta J. Li, Yang Chellman, Nathan J. Arienzo, Monica M. Kodros, John K. Pierce, Jeffrey R. Sigl, Michael Freitag, Johannes Mulvaney, Robert Curran, Mark A. J. McConnell, Joseph R. |
author_facet |
Liu, Pengfei Kaplan, Jed O. Mickley, Loretta J. Li, Yang Chellman, Nathan J. Arienzo, Monica M. Kodros, John K. Pierce, Jeffrey R. Sigl, Michael Freitag, Johannes Mulvaney, Robert Curran, Mark A. J. McConnell, Joseph R. |
author_sort |
Liu, Pengfei |
title |
Improved estimates of preindustrial biomass burning reduce the magnitude of aerosol climate forcing in the Southern Hemisphere |
title_short |
Improved estimates of preindustrial biomass burning reduce the magnitude of aerosol climate forcing in the Southern Hemisphere |
title_full |
Improved estimates of preindustrial biomass burning reduce the magnitude of aerosol climate forcing in the Southern Hemisphere |
title_fullStr |
Improved estimates of preindustrial biomass burning reduce the magnitude of aerosol climate forcing in the Southern Hemisphere |
title_full_unstemmed |
Improved estimates of preindustrial biomass burning reduce the magnitude of aerosol climate forcing in the Southern Hemisphere |
title_sort |
improved estimates of preindustrial biomass burning reduce the magnitude of aerosol climate forcing in the southern hemisphere |
publisher |
American Association for the Advancement of Science |
publishDate |
2021 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8163089/ http://www.ncbi.nlm.nih.gov/pubmed/34049885 https://doi.org/10.1126/sciadv.abc1379 |
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Antarctic |
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Antarctic |
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Antarc* Antarctic ice core |
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Antarc* Antarctic ice core |
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Sci Adv |
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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8163089/ http://www.ncbi.nlm.nih.gov/pubmed/34049885 http://dx.doi.org/10.1126/sciadv.abc1379 |
op_rights |
Copyright © 2021 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC). https://creativecommons.org/licenses/by-nc/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license (https://creativecommons.org/licenses/by-nc/4.0/) , which permits use, distribution, and reproduction in any medium, so long as the resultant use is not for commercial advantage and provided the original work is properly cited. |
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CC-BY-NC |
op_doi |
https://doi.org/10.1126/sciadv.abc1379 |
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Science Advances |
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7 |
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22 |
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eabc1379 |
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