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 |
---|---|
Main Authors: | , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
Elsevier
2016
|
Subjects: | |
Online Access: | https://epic.awi.de/id/eprint/44759/ https://doi.org/10.1016/j.chemgeo.2016.09.006 https://hdl.handle.net/10013/epic.50994 |
id |
ftawi:oai:epic.awi.de:44759 |
---|---|
record_format |
openpolar |
spelling |
ftawi:oai:epic.awi.de:44759 2023-05-15T16:38:50+02:00 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. Uglietti, C. Wegner, Anna Blakowski, M.A. Bouman, C. 2016 https://epic.awi.de/id/eprint/44759/ https://doi.org/10.1016/j.chemgeo.2016.09.006 https://hdl.handle.net/10013/epic.50994 unknown Elsevier Aarons, S. , Aciego, S. , Gabrielli, P. , Delmonte, B. , Koornneef, J. , Uglietti, C. , Wegner, A. , Blakowski, M. and Bouman, C. (2016) Ice core record of dust sources in the western United States over the last 300 years , Chemical Geology, 442 , pp. 160-173 . doi:10.1016/j.chemgeo.2016.09.006 <https://doi.org/10.1016/j.chemgeo.2016.09.006> , hdl:10013/epic.50994 EPIC3Chemical Geology, Elsevier, 442, pp. 160-173, ISSN: 00092541 Article isiRev 2016 ftawi https://doi.org/10.1016/j.chemgeo.2016.09.006 2021-12-24T15:43:00Z 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 Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Chemical Geology 442 160 173 |
institution |
Open Polar |
collection |
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
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. Uglietti, C. Wegner, Anna Blakowski, M.A. Bouman, C. |
spellingShingle |
Aarons, S.M. Aciego, S.M. Gabrielli, P. Delmonte, B. Koornneef, J.M. Uglietti, C. Wegner, Anna 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. Uglietti, C. Wegner, Anna 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 |
publisher |
Elsevier |
publishDate |
2016 |
url |
https://epic.awi.de/id/eprint/44759/ https://doi.org/10.1016/j.chemgeo.2016.09.006 https://hdl.handle.net/10013/epic.50994 |
genre |
ice core |
genre_facet |
ice core |
op_source |
EPIC3Chemical Geology, Elsevier, 442, pp. 160-173, ISSN: 00092541 |
op_relation |
Aarons, S. , Aciego, S. , Gabrielli, P. , Delmonte, B. , Koornneef, J. , Uglietti, C. , Wegner, A. , Blakowski, M. and Bouman, C. (2016) Ice core record of dust sources in the western United States over the last 300 years , Chemical Geology, 442 , pp. 160-173 . doi:10.1016/j.chemgeo.2016.09.006 <https://doi.org/10.1016/j.chemgeo.2016.09.006> , hdl:10013/epic.50994 |
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 |
_version_ |
1766029177221283840 |