Aromatic acids in a Eurasian Arctic ice core: a 2600-year proxy record of biomass burning
Wildfires and their emissions have significant impacts on ecosystems, climate, atmospheric chemistry, and carbon cycling. Well-dated proxy records are needed to study the long-term climatic controls on biomass burning and the associated climate feedbacks. There is a particular lack of information ab...
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ftcdlib:oai:escholarship.org:ark:/13030/qt5t28p1q5 2023-06-18T03:39:22+02:00 Aromatic acids in a Eurasian Arctic ice core: a 2600-year proxy record of biomass burning Grieman, Mackenzie M Aydin, Murat Fritzsche, Diedrich McConnell, Joseph R Opel, Thomas Sigl, Michael Saltzman, Eric S 395 - 410 2017-04-20 application/pdf https://escholarship.org/uc/item/5t28p1q5 unknown eScholarship, University of California qt5t28p1q5 https://escholarship.org/uc/item/5t28p1q5 public Climate of the Past, vol 13, iss 4 Climate Action Physical Geography and Environmental Geoscience Paleontology article 2017 ftcdlib 2023-06-05T18:00:35Z Wildfires and their emissions have significant impacts on ecosystems, climate, atmospheric chemistry, and carbon cycling. Well-dated proxy records are needed to study the long-term climatic controls on biomass burning and the associated climate feedbacks. There is a particular lack of information about long-term biomass burning variations in Siberia, the largest forested area in the Northern Hemisphere. In this study we report analyses of aromatic acids (vanillic and para-hydroxybenzoic acids) over the past 2600 years in the Eurasian Arctic Akademii Nauk ice core. These compounds are aerosol-borne, semi-volatile organic compounds derived from lignin combustion. The analyses were made using ion chromatography with electrospray mass spectrometric detection. The levels of these aromatic acids ranged from below the detection limit (0.01 to 0.05 ppb; 1 ppb = 1000 ng L-1) to about 1 ppb, with roughly 30% of the samples above the detection limit. In the preindustrial late Holocene, highly elevated aromatic acid levels are observed during three distinct periods (650-300 BCE, 340-660 CE, and 1460-1660 CE). The timing of the two most recent periods coincides with the episodic pulsing of ice-rafted debris in the North Atlantic known as Bond events and a weakened Asian monsoon, suggesting a link between fires and large-scale climate variability on millennial timescales. Aromatic acid levels also are elevated during the onset of the industrial period from 1780 to 1860 CE, but with a different ratio of vanillic and para-hydroxybenzoic acid than is observed during the preindustrial period. This study provides the first millennial-scale record of aromatic acids. This study clearly demonstrates that coherent aromatic acid signals are recorded in polar ice cores that can be used as proxies for past trends in biomass burning. Article in Journal/Newspaper Arctic ice core North Atlantic Siberia University of California: eScholarship Arctic |
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Open Polar |
collection |
University of California: eScholarship |
op_collection_id |
ftcdlib |
language |
unknown |
topic |
Climate Action Physical Geography and Environmental Geoscience Paleontology |
spellingShingle |
Climate Action Physical Geography and Environmental Geoscience Paleontology Grieman, Mackenzie M Aydin, Murat Fritzsche, Diedrich McConnell, Joseph R Opel, Thomas Sigl, Michael Saltzman, Eric S Aromatic acids in a Eurasian Arctic ice core: a 2600-year proxy record of biomass burning |
topic_facet |
Climate Action Physical Geography and Environmental Geoscience Paleontology |
description |
Wildfires and their emissions have significant impacts on ecosystems, climate, atmospheric chemistry, and carbon cycling. Well-dated proxy records are needed to study the long-term climatic controls on biomass burning and the associated climate feedbacks. There is a particular lack of information about long-term biomass burning variations in Siberia, the largest forested area in the Northern Hemisphere. In this study we report analyses of aromatic acids (vanillic and para-hydroxybenzoic acids) over the past 2600 years in the Eurasian Arctic Akademii Nauk ice core. These compounds are aerosol-borne, semi-volatile organic compounds derived from lignin combustion. The analyses were made using ion chromatography with electrospray mass spectrometric detection. The levels of these aromatic acids ranged from below the detection limit (0.01 to 0.05 ppb; 1 ppb = 1000 ng L-1) to about 1 ppb, with roughly 30% of the samples above the detection limit. In the preindustrial late Holocene, highly elevated aromatic acid levels are observed during three distinct periods (650-300 BCE, 340-660 CE, and 1460-1660 CE). The timing of the two most recent periods coincides with the episodic pulsing of ice-rafted debris in the North Atlantic known as Bond events and a weakened Asian monsoon, suggesting a link between fires and large-scale climate variability on millennial timescales. Aromatic acid levels also are elevated during the onset of the industrial period from 1780 to 1860 CE, but with a different ratio of vanillic and para-hydroxybenzoic acid than is observed during the preindustrial period. This study provides the first millennial-scale record of aromatic acids. This study clearly demonstrates that coherent aromatic acid signals are recorded in polar ice cores that can be used as proxies for past trends in biomass burning. |
format |
Article in Journal/Newspaper |
author |
Grieman, Mackenzie M Aydin, Murat Fritzsche, Diedrich McConnell, Joseph R Opel, Thomas Sigl, Michael Saltzman, Eric S |
author_facet |
Grieman, Mackenzie M Aydin, Murat Fritzsche, Diedrich McConnell, Joseph R Opel, Thomas Sigl, Michael Saltzman, Eric S |
author_sort |
Grieman, Mackenzie M |
title |
Aromatic acids in a Eurasian Arctic ice core: a 2600-year proxy record of biomass burning |
title_short |
Aromatic acids in a Eurasian Arctic ice core: a 2600-year proxy record of biomass burning |
title_full |
Aromatic acids in a Eurasian Arctic ice core: a 2600-year proxy record of biomass burning |
title_fullStr |
Aromatic acids in a Eurasian Arctic ice core: a 2600-year proxy record of biomass burning |
title_full_unstemmed |
Aromatic acids in a Eurasian Arctic ice core: a 2600-year proxy record of biomass burning |
title_sort |
aromatic acids in a eurasian arctic ice core: a 2600-year proxy record of biomass burning |
publisher |
eScholarship, University of California |
publishDate |
2017 |
url |
https://escholarship.org/uc/item/5t28p1q5 |
op_coverage |
395 - 410 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic ice core North Atlantic Siberia |
genre_facet |
Arctic ice core North Atlantic Siberia |
op_source |
Climate of the Past, vol 13, iss 4 |
op_relation |
qt5t28p1q5 https://escholarship.org/uc/item/5t28p1q5 |
op_rights |
public |
_version_ |
1769004121750241280 |