Yukon River incision drove organic carbon burial in the Bering Sea during global climate changes at 2.6 and 1 Ma
River erosion affects the carbon cycle and thus climate by exporting terrigenous carbon to seafloor sediment and by nourishing CO 2 -consuming marine life. The Yukon River–Bering Sea system preserves rare source-to-sink records of these processes across profound changes in global climate during the...
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Copernicus Publications
2022
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Online Access: | https://doi.org/10.5194/esurf-10-1041-2022 https://doaj.org/article/a5dce7ad80604cbb971309793b9fa37b |
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ftdoajarticles:oai:doaj.org/article:a5dce7ad80604cbb971309793b9fa37b 2023-05-15T15:43:11+02:00 Yukon River incision drove organic carbon burial in the Bering Sea during global climate changes at 2.6 and 1 Ma A. M. Bender R. O. Lease L. B. Corbett P. R. Bierman M. W. Caffee J. V. Jones D. Kreiner 2022-10-01T00:00:00Z https://doi.org/10.5194/esurf-10-1041-2022 https://doaj.org/article/a5dce7ad80604cbb971309793b9fa37b EN eng Copernicus Publications https://esurf.copernicus.org/articles/10/1041/2022/esurf-10-1041-2022.pdf https://doaj.org/toc/2196-6311 https://doaj.org/toc/2196-632X doi:10.5194/esurf-10-1041-2022 2196-6311 2196-632X https://doaj.org/article/a5dce7ad80604cbb971309793b9fa37b Earth Surface Dynamics, Vol 10, Pp 1041-1053 (2022) Dynamic and structural geology QE500-639.5 article 2022 ftdoajarticles https://doi.org/10.5194/esurf-10-1041-2022 2022-12-30T20:54:26Z River erosion affects the carbon cycle and thus climate by exporting terrigenous carbon to seafloor sediment and by nourishing CO 2 -consuming marine life. The Yukon River–Bering Sea system preserves rare source-to-sink records of these processes across profound changes in global climate during the past 5 million years (Ma). Here, we expand the terrestrial erosion record by dating terraces along the Charley River, Alaska, and explore linkages among previously published Yukon River tributary incision chronologies and Bering Sea sedimentation. Cosmogenic <math xmlns="http://www.w3.org/1998/Math/MathML" id="M2" display="inline" overflow="scroll" dspmath="mathml"><mrow><mrow class="chem"><msup><mi/><mn mathvariant="normal">26</mn></msup><mi mathvariant="normal">Al</mi></mrow><mo>/</mo><mrow class="chem"><msup><mi/><mn mathvariant="normal">10</mn></msup><mi mathvariant="normal">Be</mi></mrow></mrow></math> <svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="50pt" height="15pt" class="svg-formula" dspmath="mathimg" md5hash="eaa31c44e7a402abc4a04e87022a8d92"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="esurf-10-1041-2022-ie00001.svg" width="50pt" height="15pt" src="esurf-10-1041-2022-ie00001.png"/></svg:svg> isochron burial ages of Charley River terraces match previously documented central Yukon River tributary incision from 2.6 to 1.6 Ma during Pliocene–Pleistocene glacial expansion, and at 1.1 Ma during the 1.2–0.7 Ma Middle Pleistocene climate transition. Bering Sea sediments preserve 2–4-fold rate increases of Yukon River-derived continental detritus, terrestrial and marine organic carbon, and silicate microfossil deposition at 2.6–2.1 and 1.1–0.8 Ma. These tightly coupled records demonstrate elevated terrigenous nutrient and carbon export and concomitant Bering Sea productivity in response to climate-forced Yukon River incision. ... Article in Journal/Newspaper Bering Sea Yukon river Alaska Yukon Directory of Open Access Journals: DOAJ Articles Bering Sea Yukon Earth Surface Dynamics 10 5 1041 1053 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Dynamic and structural geology QE500-639.5 |
spellingShingle |
Dynamic and structural geology QE500-639.5 A. M. Bender R. O. Lease L. B. Corbett P. R. Bierman M. W. Caffee J. V. Jones D. Kreiner Yukon River incision drove organic carbon burial in the Bering Sea during global climate changes at 2.6 and 1 Ma |
topic_facet |
Dynamic and structural geology QE500-639.5 |
description |
River erosion affects the carbon cycle and thus climate by exporting terrigenous carbon to seafloor sediment and by nourishing CO 2 -consuming marine life. The Yukon River–Bering Sea system preserves rare source-to-sink records of these processes across profound changes in global climate during the past 5 million years (Ma). Here, we expand the terrestrial erosion record by dating terraces along the Charley River, Alaska, and explore linkages among previously published Yukon River tributary incision chronologies and Bering Sea sedimentation. Cosmogenic <math xmlns="http://www.w3.org/1998/Math/MathML" id="M2" display="inline" overflow="scroll" dspmath="mathml"><mrow><mrow class="chem"><msup><mi/><mn mathvariant="normal">26</mn></msup><mi mathvariant="normal">Al</mi></mrow><mo>/</mo><mrow class="chem"><msup><mi/><mn mathvariant="normal">10</mn></msup><mi mathvariant="normal">Be</mi></mrow></mrow></math> <svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="50pt" height="15pt" class="svg-formula" dspmath="mathimg" md5hash="eaa31c44e7a402abc4a04e87022a8d92"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="esurf-10-1041-2022-ie00001.svg" width="50pt" height="15pt" src="esurf-10-1041-2022-ie00001.png"/></svg:svg> isochron burial ages of Charley River terraces match previously documented central Yukon River tributary incision from 2.6 to 1.6 Ma during Pliocene–Pleistocene glacial expansion, and at 1.1 Ma during the 1.2–0.7 Ma Middle Pleistocene climate transition. Bering Sea sediments preserve 2–4-fold rate increases of Yukon River-derived continental detritus, terrestrial and marine organic carbon, and silicate microfossil deposition at 2.6–2.1 and 1.1–0.8 Ma. These tightly coupled records demonstrate elevated terrigenous nutrient and carbon export and concomitant Bering Sea productivity in response to climate-forced Yukon River incision. ... |
format |
Article in Journal/Newspaper |
author |
A. M. Bender R. O. Lease L. B. Corbett P. R. Bierman M. W. Caffee J. V. Jones D. Kreiner |
author_facet |
A. M. Bender R. O. Lease L. B. Corbett P. R. Bierman M. W. Caffee J. V. Jones D. Kreiner |
author_sort |
A. M. Bender |
title |
Yukon River incision drove organic carbon burial in the Bering Sea during global climate changes at 2.6 and 1 Ma |
title_short |
Yukon River incision drove organic carbon burial in the Bering Sea during global climate changes at 2.6 and 1 Ma |
title_full |
Yukon River incision drove organic carbon burial in the Bering Sea during global climate changes at 2.6 and 1 Ma |
title_fullStr |
Yukon River incision drove organic carbon burial in the Bering Sea during global climate changes at 2.6 and 1 Ma |
title_full_unstemmed |
Yukon River incision drove organic carbon burial in the Bering Sea during global climate changes at 2.6 and 1 Ma |
title_sort |
yukon river incision drove organic carbon burial in the bering sea during global climate changes at 2.6 and 1 ma |
publisher |
Copernicus Publications |
publishDate |
2022 |
url |
https://doi.org/10.5194/esurf-10-1041-2022 https://doaj.org/article/a5dce7ad80604cbb971309793b9fa37b |
geographic |
Bering Sea Yukon |
geographic_facet |
Bering Sea Yukon |
genre |
Bering Sea Yukon river Alaska Yukon |
genre_facet |
Bering Sea Yukon river Alaska Yukon |
op_source |
Earth Surface Dynamics, Vol 10, Pp 1041-1053 (2022) |
op_relation |
https://esurf.copernicus.org/articles/10/1041/2022/esurf-10-1041-2022.pdf https://doaj.org/toc/2196-6311 https://doaj.org/toc/2196-632X doi:10.5194/esurf-10-1041-2022 2196-6311 2196-632X https://doaj.org/article/a5dce7ad80604cbb971309793b9fa37b |
op_doi |
https://doi.org/10.5194/esurf-10-1041-2022 |
container_title |
Earth Surface Dynamics |
container_volume |
10 |
container_issue |
5 |
container_start_page |
1041 |
op_container_end_page |
1053 |
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1766377220618584064 |