Suspended sediment deposition and sediment yields at Lake Peters, northeast Brooks Range, Alaska: Fluvial‐ and lake‐based approaches
Abstract Lake‐based studies can provide seasonal‐ to millennial‐scale records of sediment yield to improve our understanding of catchment‐scale sediment transfer and complement shorter fluvial‐based sediment transport studies. In this study, sediment accumulation rates at 40 coring locations in Lake...
Published in: | Earth Surface Processes and Landforms |
---|---|
Main Authors: | , , , |
Other Authors: | |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Wiley
2023
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1002/esp.5642 https://onlinelibrary.wiley.com/doi/am-pdf/10.1002/esp.5642 https://onlinelibrary.wiley.com/doi/pdf/10.1002/esp.5642 |
id |
crwiley:10.1002/esp.5642 |
---|---|
record_format |
openpolar |
spelling |
crwiley:10.1002/esp.5642 2024-06-02T08:02:03+00:00 Suspended sediment deposition and sediment yields at Lake Peters, northeast Brooks Range, Alaska: Fluvial‐ and lake‐based approaches Thurston, Lorna Louise Schiefer, Erik McKay, Nicholas P. Kaufman, Darrell S. Division of Arctic Sciences 2023 http://dx.doi.org/10.1002/esp.5642 https://onlinelibrary.wiley.com/doi/am-pdf/10.1002/esp.5642 https://onlinelibrary.wiley.com/doi/pdf/10.1002/esp.5642 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Earth Surface Processes and Landforms volume 48, issue 13, page 2521-2535 ISSN 0197-9337 1096-9837 journal-article 2023 crwiley https://doi.org/10.1002/esp.5642 2024-05-03T11:50:27Z Abstract Lake‐based studies can provide seasonal‐ to millennial‐scale records of sediment yield to improve our understanding of catchment‐scale sediment transfer and complement shorter fluvial‐based sediment transport studies. In this study, sediment accumulation rates at 40 coring locations in Lake Peters, Brooks Range, Alaska, over ca. 42 years, calculated using fallout radionuclides and sediment density patterns, were spatially modelled based on distance from the primary inflow and lake water depth. We estimated mean interdecadal specific sediment yield (Mg km −2 year −1 ) using the spatially modelled sediment accumulation rates and compared that result to fluvial‐based sediment delivery for 2015–2016 open‐channel seasons, as well as to yields reported for other Arctic catchments. Using the lake‐based method, mean yield to Lake Peters between ca. 1973 and 2015 was 52 ± 12 Mg km −2 year −1 , which is comparable with fluvial‐based modelling results of 33 (20–60) Mg km −2 year −1 in 2015 and 79 (50–140) Mg km −2 year −1 in 2016 (95% confidence intervals), respectively. Although 2016 was a year of above average sedimentation, the last extreme depositional event probably occurred between ca. 1970 and 1976 when a basal layer of fine sand was deposited in a broadly distributed, relatively thick and coarse bed, which we used for lake‐wide correlation. The dual lacustrine–fluvial method approach permits study of within‐lake and catchment‐scale processes. Within Lake Peters, sedimentation patterns show decreasing fluxes down‐lake, sediment bypassing near the primary inflow, the influence of secondary inflows and littoral redistribution, and a focusing effect in the deep proximal basin. At the watershed scale, sediment yield is largely driven by intense summer rainfall and strong seasonal hydroclimatic variability. This research informs paleo‐environmental reconstruction and environmental system modelling in Arctic lake catchments. Article in Journal/Newspaper Arctic Brooks Range Alaska Wiley Online Library Arctic Arctic Lake ENVELOPE(-130.826,-130.826,57.231,57.231) Earth Surface Processes and Landforms 48 13 2521 2535 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
Abstract Lake‐based studies can provide seasonal‐ to millennial‐scale records of sediment yield to improve our understanding of catchment‐scale sediment transfer and complement shorter fluvial‐based sediment transport studies. In this study, sediment accumulation rates at 40 coring locations in Lake Peters, Brooks Range, Alaska, over ca. 42 years, calculated using fallout radionuclides and sediment density patterns, were spatially modelled based on distance from the primary inflow and lake water depth. We estimated mean interdecadal specific sediment yield (Mg km −2 year −1 ) using the spatially modelled sediment accumulation rates and compared that result to fluvial‐based sediment delivery for 2015–2016 open‐channel seasons, as well as to yields reported for other Arctic catchments. Using the lake‐based method, mean yield to Lake Peters between ca. 1973 and 2015 was 52 ± 12 Mg km −2 year −1 , which is comparable with fluvial‐based modelling results of 33 (20–60) Mg km −2 year −1 in 2015 and 79 (50–140) Mg km −2 year −1 in 2016 (95% confidence intervals), respectively. Although 2016 was a year of above average sedimentation, the last extreme depositional event probably occurred between ca. 1970 and 1976 when a basal layer of fine sand was deposited in a broadly distributed, relatively thick and coarse bed, which we used for lake‐wide correlation. The dual lacustrine–fluvial method approach permits study of within‐lake and catchment‐scale processes. Within Lake Peters, sedimentation patterns show decreasing fluxes down‐lake, sediment bypassing near the primary inflow, the influence of secondary inflows and littoral redistribution, and a focusing effect in the deep proximal basin. At the watershed scale, sediment yield is largely driven by intense summer rainfall and strong seasonal hydroclimatic variability. This research informs paleo‐environmental reconstruction and environmental system modelling in Arctic lake catchments. |
author2 |
Division of Arctic Sciences |
format |
Article in Journal/Newspaper |
author |
Thurston, Lorna Louise Schiefer, Erik McKay, Nicholas P. Kaufman, Darrell S. |
spellingShingle |
Thurston, Lorna Louise Schiefer, Erik McKay, Nicholas P. Kaufman, Darrell S. Suspended sediment deposition and sediment yields at Lake Peters, northeast Brooks Range, Alaska: Fluvial‐ and lake‐based approaches |
author_facet |
Thurston, Lorna Louise Schiefer, Erik McKay, Nicholas P. Kaufman, Darrell S. |
author_sort |
Thurston, Lorna Louise |
title |
Suspended sediment deposition and sediment yields at Lake Peters, northeast Brooks Range, Alaska: Fluvial‐ and lake‐based approaches |
title_short |
Suspended sediment deposition and sediment yields at Lake Peters, northeast Brooks Range, Alaska: Fluvial‐ and lake‐based approaches |
title_full |
Suspended sediment deposition and sediment yields at Lake Peters, northeast Brooks Range, Alaska: Fluvial‐ and lake‐based approaches |
title_fullStr |
Suspended sediment deposition and sediment yields at Lake Peters, northeast Brooks Range, Alaska: Fluvial‐ and lake‐based approaches |
title_full_unstemmed |
Suspended sediment deposition and sediment yields at Lake Peters, northeast Brooks Range, Alaska: Fluvial‐ and lake‐based approaches |
title_sort |
suspended sediment deposition and sediment yields at lake peters, northeast brooks range, alaska: fluvial‐ and lake‐based approaches |
publisher |
Wiley |
publishDate |
2023 |
url |
http://dx.doi.org/10.1002/esp.5642 https://onlinelibrary.wiley.com/doi/am-pdf/10.1002/esp.5642 https://onlinelibrary.wiley.com/doi/pdf/10.1002/esp.5642 |
long_lat |
ENVELOPE(-130.826,-130.826,57.231,57.231) |
geographic |
Arctic Arctic Lake |
geographic_facet |
Arctic Arctic Lake |
genre |
Arctic Brooks Range Alaska |
genre_facet |
Arctic Brooks Range Alaska |
op_source |
Earth Surface Processes and Landforms volume 48, issue 13, page 2521-2535 ISSN 0197-9337 1096-9837 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/esp.5642 |
container_title |
Earth Surface Processes and Landforms |
container_volume |
48 |
container_issue |
13 |
container_start_page |
2521 |
op_container_end_page |
2535 |
_version_ |
1800746552161992704 |