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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American Association for the Advancement of Science
2021
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Online Access: | https://boris.unibe.ch/159960/1/Liu_accepted.pdf https://boris.unibe.ch/159960/2/Liu_2021_SciAdv.pdf https://boris.unibe.ch/159960/ |
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ftunivbern:oai:boris.unibe.ch:159960 2023-08-20T04:02:31+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 application/pdf https://boris.unibe.ch/159960/1/Liu_accepted.pdf https://boris.unibe.ch/159960/2/Liu_2021_SciAdv.pdf https://boris.unibe.ch/159960/ eng eng American Association for the Advancement of Science https://boris.unibe.ch/159960/ info:eu-repo/semantics/restrictedAccess info:eu-repo/semantics/openAccess 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). Improved estimates of preindustrial biomass burning reduce the magnitude of aerosol climate forcing in the Southern Hemisphere. Science Advances, 7(22) American Association for the Advancement of Science 10.1126/sciadv.abc1379 <http://dx.doi.org/10.1126/sciadv.abc1379> 530 Physics info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion PeerReviewed 2021 ftunivbern https://doi.org/10.1126/sciadv.abc1379 2023-07-31T22:09:00Z 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. Article in Journal/Newspaper Antarc* Antarctic ice core BORIS (Bern Open Repository and Information System, University of Bern) Antarctic Science Advances 7 22 |
institution |
Open Polar |
collection |
BORIS (Bern Open Repository and Information System, University of Bern) |
op_collection_id |
ftunivbern |
language |
English |
topic |
530 Physics |
spellingShingle |
530 Physics 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 |
topic_facet |
530 Physics |
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 |
Article in Journal/Newspaper |
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 |
https://boris.unibe.ch/159960/1/Liu_accepted.pdf https://boris.unibe.ch/159960/2/Liu_2021_SciAdv.pdf https://boris.unibe.ch/159960/ |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic ice core |
genre_facet |
Antarc* Antarctic ice core |
op_source |
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). Improved estimates of preindustrial biomass burning reduce the magnitude of aerosol climate forcing in the Southern Hemisphere. Science Advances, 7(22) American Association for the Advancement of Science 10.1126/sciadv.abc1379 <http://dx.doi.org/10.1126/sciadv.abc1379> |
op_relation |
https://boris.unibe.ch/159960/ |
op_rights |
info:eu-repo/semantics/restrictedAccess info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1126/sciadv.abc1379 |
container_title |
Science Advances |
container_volume |
7 |
container_issue |
22 |
_version_ |
1774713005848657920 |