Ice core record of dust sources in the western United States over the last 300 years
Over the past ~ 5000 years, amplified dust generation and deposition in the American West has been linked to human activity. In recent decades, intensified rates of agriculture and livestock grazing have been correlated with greater dust production detected on seasonal to annual timescales. The comb...
Published in: | Chemical Geology |
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2016
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Online Access: | https://research.vu.nl/en/publications/0574b4b9-eb4e-4b74-916d-61ce6c4a2493 https://doi.org/10.1016/j.chemgeo.2016.09.006 https://hdl.handle.net/1871.1/0574b4b9-eb4e-4b74-916d-61ce6c4a2493 |
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ftvuamstcris:oai:research.vu.nl:publications/0574b4b9-eb4e-4b74-916d-61ce6c4a2493 2024-09-15T18:11:56+00:00 Ice core record of dust sources in the western United States over the last 300 years Aarons, S.M. Aciego, S.M. Gabrielli, P. Delmonte, B. Koornneef, J.M. Wegner, A. Blakowski, M.A. Bouman, C. 2016 https://research.vu.nl/en/publications/0574b4b9-eb4e-4b74-916d-61ce6c4a2493 https://doi.org/10.1016/j.chemgeo.2016.09.006 https://hdl.handle.net/1871.1/0574b4b9-eb4e-4b74-916d-61ce6c4a2493 eng eng https://research.vu.nl/en/publications/0574b4b9-eb4e-4b74-916d-61ce6c4a2493 info:eu-repo/semantics/openAccess Aarons , S M , Aciego , S M , Gabrielli , P , Delmonte , B , Koornneef , J M , Wegner , A , Blakowski , M A & Bouman , C 2016 , ' Ice core record of dust sources in the western United States over the last 300 years ' , Chemical Geology , no. 442 , pp. 160-173 . https://doi.org/10.1016/j.chemgeo.2016.09.006 article 2016 ftvuamstcris https://doi.org/10.1016/j.chemgeo.2016.09.006 2024-07-10T23:48:03Z Over the past ~ 5000 years, amplified dust generation and deposition in the American West has been linked to human activity. In recent decades, intensified rates of agriculture and livestock grazing have been correlated with greater dust production detected on seasonal to annual timescales. The combination of land use intensification and climate change (i.e. increased drought frequency) in North America highlights the importance of characterizing the sources of dust both before and after the influence of anthropogenic activity. We apply high-precision geochemical and isotopic (Sr and Nd isotopes) techniques to an ice core from the Upper Fremont Glacier (Wyoming, USA) to produce the first glacial dataset from the American West. Our Sr-Nd isotopic composition data indicates the evolving dust provenance to the Upper Fremont Glacier (UFG) from a long-range transport of mineral dust to a local source. This increasing input of dust from a local source is supported by a rise in average dust particle diameter combined with greater average dust concentration throughout the record. The greater presence of dust particles smaller than 2.5 μm in the most recent samples from UFG ice core record support existing satellite and sediment core data regarding the effects of anthropogenic activity upon dust sources and pathways in the American West. Although the Sr-Nd isotope database in North America needs be expanded, our results provide a survey of windborne dust through the past 270 years. Article in Journal/Newspaper ice core Vrije Universiteit Amsterdam (VU): Research Portal Chemical Geology 442 160 173 |
institution |
Open Polar |
collection |
Vrije Universiteit Amsterdam (VU): Research Portal |
op_collection_id |
ftvuamstcris |
language |
English |
description |
Over the past ~ 5000 years, amplified dust generation and deposition in the American West has been linked to human activity. In recent decades, intensified rates of agriculture and livestock grazing have been correlated with greater dust production detected on seasonal to annual timescales. The combination of land use intensification and climate change (i.e. increased drought frequency) in North America highlights the importance of characterizing the sources of dust both before and after the influence of anthropogenic activity. We apply high-precision geochemical and isotopic (Sr and Nd isotopes) techniques to an ice core from the Upper Fremont Glacier (Wyoming, USA) to produce the first glacial dataset from the American West. Our Sr-Nd isotopic composition data indicates the evolving dust provenance to the Upper Fremont Glacier (UFG) from a long-range transport of mineral dust to a local source. This increasing input of dust from a local source is supported by a rise in average dust particle diameter combined with greater average dust concentration throughout the record. The greater presence of dust particles smaller than 2.5 μm in the most recent samples from UFG ice core record support existing satellite and sediment core data regarding the effects of anthropogenic activity upon dust sources and pathways in the American West. Although the Sr-Nd isotope database in North America needs be expanded, our results provide a survey of windborne dust through the past 270 years. |
format |
Article in Journal/Newspaper |
author |
Aarons, S.M. Aciego, S.M. Gabrielli, P. Delmonte, B. Koornneef, J.M. Wegner, A. Blakowski, M.A. Bouman, C. |
spellingShingle |
Aarons, S.M. Aciego, S.M. Gabrielli, P. Delmonte, B. Koornneef, J.M. Wegner, A. Blakowski, M.A. Bouman, C. Ice core record of dust sources in the western United States over the last 300 years |
author_facet |
Aarons, S.M. Aciego, S.M. Gabrielli, P. Delmonte, B. Koornneef, J.M. Wegner, A. Blakowski, M.A. Bouman, C. |
author_sort |
Aarons, S.M. |
title |
Ice core record of dust sources in the western United States over the last 300 years |
title_short |
Ice core record of dust sources in the western United States over the last 300 years |
title_full |
Ice core record of dust sources in the western United States over the last 300 years |
title_fullStr |
Ice core record of dust sources in the western United States over the last 300 years |
title_full_unstemmed |
Ice core record of dust sources in the western United States over the last 300 years |
title_sort |
ice core record of dust sources in the western united states over the last 300 years |
publishDate |
2016 |
url |
https://research.vu.nl/en/publications/0574b4b9-eb4e-4b74-916d-61ce6c4a2493 https://doi.org/10.1016/j.chemgeo.2016.09.006 https://hdl.handle.net/1871.1/0574b4b9-eb4e-4b74-916d-61ce6c4a2493 |
genre |
ice core |
genre_facet |
ice core |
op_source |
Aarons , S M , Aciego , S M , Gabrielli , P , Delmonte , B , Koornneef , J M , Wegner , A , Blakowski , M A & Bouman , C 2016 , ' Ice core record of dust sources in the western United States over the last 300 years ' , Chemical Geology , no. 442 , pp. 160-173 . https://doi.org/10.1016/j.chemgeo.2016.09.006 |
op_relation |
https://research.vu.nl/en/publications/0574b4b9-eb4e-4b74-916d-61ce6c4a2493 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1016/j.chemgeo.2016.09.006 |
container_title |
Chemical Geology |
container_volume |
442 |
container_start_page |
160 |
op_container_end_page |
173 |
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1810449510674989056 |