Polar ice core organic matter signatures reveal past atmospheric carbon composition and spatial trends across ancient and modern timescales
We present polar ice core organic matter (OM) fluorescence signatures to reconstruct ancient and modern atmospheric compositions and relate OM signals to past ecological changes. OM composition from three Arctic ice cores (Canada and Greenland) was characterized by fluorescence spectroscopy and comp...
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Cambridge University Press
2021
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Online Access: | https://doi.org/10.1017/jog.2021.51 https://doaj.org/article/d8b1994e11b844a09b50c8bc6aa42b67 |
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ftdoajarticles:oai:doaj.org/article:d8b1994e11b844a09b50c8bc6aa42b67 2023-05-15T14:01:35+02:00 Polar ice core organic matter signatures reveal past atmospheric carbon composition and spatial trends across ancient and modern timescales Juliana D'Andrilli Joseph R. McConnell 2021-12-01T00:00:00Z https://doi.org/10.1017/jog.2021.51 https://doaj.org/article/d8b1994e11b844a09b50c8bc6aa42b67 EN eng Cambridge University Press https://www.cambridge.org/core/product/identifier/S0022143021000514/type/journal_article https://doaj.org/toc/0022-1430 https://doaj.org/toc/1727-5652 doi:10.1017/jog.2021.51 0022-1430 1727-5652 https://doaj.org/article/d8b1994e11b844a09b50c8bc6aa42b67 Journal of Glaciology, Vol 67, Pp 1028-1042 (2021) Fluorescence spectroscopy global cryosphere organic matter comparisons ice core carbon paleoclimatology Environmental sciences GE1-350 Meteorology. Climatology QC851-999 article 2021 ftdoajarticles https://doi.org/10.1017/jog.2021.51 2023-03-12T01:30:57Z We present polar ice core organic matter (OM) fluorescence signatures to reconstruct ancient and modern atmospheric compositions and relate OM signals to past ecological changes. OM composition from three Arctic ice cores (Canada and Greenland) was characterized by fluorescence spectroscopy and compared to an Antarctic OM record. Diverse OM was measured in ancient and modern ice in both hemispheres and similarities existed across vast spatiotemporal scales. We determined three OM markers, indicating paleoclimate and modern carbon trends: (i) ‘humic-like’, detected in Holocene ice of more complex and aromatic character, supporting trends of higher plant influences in warmer climates, (ii) monolignol- and non-amino acid-like, describing simple, lignin-like OM precursors ubiquitous in the environment and the microbial degradation products of more complex materials from plants/soils, and (iii) amino acid- and tannin-like, indicating microbial degradation of simple OM chemical species, compared to the other markers. Concentration trends were inferred from fluorescence intensities of individual OM types and related to warmer temperatures. No indicators of freshly produced OM by microbes were detected; signals were interpreted as materials externally produced from the ice and transported to polar regions. This marks the first global comparison of atmospheric reconstructions from OM across vast spatiotemporal scales. Article in Journal/Newspaper Antarc* Antarctic Arctic Greenland ice core Journal of Glaciology Directory of Open Access Journals: DOAJ Articles Arctic Antarctic Canada Greenland Journal of Glaciology 67 266 1028 1042 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Fluorescence spectroscopy global cryosphere organic matter comparisons ice core carbon paleoclimatology Environmental sciences GE1-350 Meteorology. Climatology QC851-999 |
spellingShingle |
Fluorescence spectroscopy global cryosphere organic matter comparisons ice core carbon paleoclimatology Environmental sciences GE1-350 Meteorology. Climatology QC851-999 Juliana D'Andrilli Joseph R. McConnell Polar ice core organic matter signatures reveal past atmospheric carbon composition and spatial trends across ancient and modern timescales |
topic_facet |
Fluorescence spectroscopy global cryosphere organic matter comparisons ice core carbon paleoclimatology Environmental sciences GE1-350 Meteorology. Climatology QC851-999 |
description |
We present polar ice core organic matter (OM) fluorescence signatures to reconstruct ancient and modern atmospheric compositions and relate OM signals to past ecological changes. OM composition from three Arctic ice cores (Canada and Greenland) was characterized by fluorescence spectroscopy and compared to an Antarctic OM record. Diverse OM was measured in ancient and modern ice in both hemispheres and similarities existed across vast spatiotemporal scales. We determined three OM markers, indicating paleoclimate and modern carbon trends: (i) ‘humic-like’, detected in Holocene ice of more complex and aromatic character, supporting trends of higher plant influences in warmer climates, (ii) monolignol- and non-amino acid-like, describing simple, lignin-like OM precursors ubiquitous in the environment and the microbial degradation products of more complex materials from plants/soils, and (iii) amino acid- and tannin-like, indicating microbial degradation of simple OM chemical species, compared to the other markers. Concentration trends were inferred from fluorescence intensities of individual OM types and related to warmer temperatures. No indicators of freshly produced OM by microbes were detected; signals were interpreted as materials externally produced from the ice and transported to polar regions. This marks the first global comparison of atmospheric reconstructions from OM across vast spatiotemporal scales. |
format |
Article in Journal/Newspaper |
author |
Juliana D'Andrilli Joseph R. McConnell |
author_facet |
Juliana D'Andrilli Joseph R. McConnell |
author_sort |
Juliana D'Andrilli |
title |
Polar ice core organic matter signatures reveal past atmospheric carbon composition and spatial trends across ancient and modern timescales |
title_short |
Polar ice core organic matter signatures reveal past atmospheric carbon composition and spatial trends across ancient and modern timescales |
title_full |
Polar ice core organic matter signatures reveal past atmospheric carbon composition and spatial trends across ancient and modern timescales |
title_fullStr |
Polar ice core organic matter signatures reveal past atmospheric carbon composition and spatial trends across ancient and modern timescales |
title_full_unstemmed |
Polar ice core organic matter signatures reveal past atmospheric carbon composition and spatial trends across ancient and modern timescales |
title_sort |
polar ice core organic matter signatures reveal past atmospheric carbon composition and spatial trends across ancient and modern timescales |
publisher |
Cambridge University Press |
publishDate |
2021 |
url |
https://doi.org/10.1017/jog.2021.51 https://doaj.org/article/d8b1994e11b844a09b50c8bc6aa42b67 |
geographic |
Arctic Antarctic Canada Greenland |
geographic_facet |
Arctic Antarctic Canada Greenland |
genre |
Antarc* Antarctic Arctic Greenland ice core Journal of Glaciology |
genre_facet |
Antarc* Antarctic Arctic Greenland ice core Journal of Glaciology |
op_source |
Journal of Glaciology, Vol 67, Pp 1028-1042 (2021) |
op_relation |
https://www.cambridge.org/core/product/identifier/S0022143021000514/type/journal_article https://doaj.org/toc/0022-1430 https://doaj.org/toc/1727-5652 doi:10.1017/jog.2021.51 0022-1430 1727-5652 https://doaj.org/article/d8b1994e11b844a09b50c8bc6aa42b67 |
op_doi |
https://doi.org/10.1017/jog.2021.51 |
container_title |
Journal of Glaciology |
container_volume |
67 |
container_issue |
266 |
container_start_page |
1028 |
op_container_end_page |
1042 |
_version_ |
1766271499953504256 |