Temporal patterns of suspended sediment yield following moderate to extreme hydrological events recorded in varved lacustrine sediments
Abstract A 487‐year annually laminated (varved) sediment record from Nicolay Lake, Cornwall Island, in the Canadian High Arctic was evaluated to determine the impact that years with high sediment yields had on sediment yields in subsequent years. All of the 40 largest years showed evidence for incre...
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crwiley:10.1002/esp.399 2024-06-02T08:02:34+00:00 Temporal patterns of suspended sediment yield following moderate to extreme hydrological events recorded in varved lacustrine sediments Lamoureux, Scott 2002 http://dx.doi.org/10.1002/esp.399 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fesp.399 https://onlinelibrary.wiley.com/doi/pdf/10.1002/esp.399 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Earth Surface Processes and Landforms volume 27, issue 10, page 1107-1124 ISSN 0197-9337 1096-9837 journal-article 2002 crwiley https://doi.org/10.1002/esp.399 2024-05-03T11:12:09Z Abstract A 487‐year annually laminated (varved) sediment record from Nicolay Lake, Cornwall Island, in the Canadian High Arctic was evaluated to determine the impact that years with high sediment yields had on sediment yields in subsequent years. All of the 40 largest years showed evidence for increased sediment yield in the subsequent 10–30 years. The positive anomalies in lagging years were approximately scaled according to the size of the initiating year, although many intermediate years (25‐ to 100‐year recurrence) showed weak or variable responses. The smallest events considered (10‐ to 25‐year recurrence) showed a consistent, but low‐amplitude response. Additionally the 10‐year events revealed frequent negative sediment yield anomalies in the preceding decade. This behaviour was interpreted as a frequent sediment activation cycle initiated by the modest year, and leading to sediment yield hysteresis lasting 15–25 years. The largest years (greater than 50‐year recurrence) showed consistently above‐average sediment yields in the preceding decade, in part due to the frequent occurrence of moderate ( Q 10 ) years. It is hypothesized that temporary storage of sediment and previous initiation of erosion sites resulted in extraordinary sediment yields during intense summer rainfall events. This study demonstrates the potential use of varved lake sediment records to improve our understanding of long‐term sediment dynamics. These records present an opportunity to further develop and test sediment dynamic and routing models to gain insight into the interaction of time and space in fluvial and sediment delivery processes. Copyright © 2002 John Wiley & Sons, Ltd. Article in Journal/Newspaper Arctic Cornwall Island Wiley Online Library Arctic Cornwall ENVELOPE(-59.688,-59.688,-62.366,-62.366) Cornwall Island ENVELOPE(-59.709,-59.709,-62.343,-62.343) Earth Surface Processes and Landforms 27 10 1107 1124 |
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English |
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Abstract A 487‐year annually laminated (varved) sediment record from Nicolay Lake, Cornwall Island, in the Canadian High Arctic was evaluated to determine the impact that years with high sediment yields had on sediment yields in subsequent years. All of the 40 largest years showed evidence for increased sediment yield in the subsequent 10–30 years. The positive anomalies in lagging years were approximately scaled according to the size of the initiating year, although many intermediate years (25‐ to 100‐year recurrence) showed weak or variable responses. The smallest events considered (10‐ to 25‐year recurrence) showed a consistent, but low‐amplitude response. Additionally the 10‐year events revealed frequent negative sediment yield anomalies in the preceding decade. This behaviour was interpreted as a frequent sediment activation cycle initiated by the modest year, and leading to sediment yield hysteresis lasting 15–25 years. The largest years (greater than 50‐year recurrence) showed consistently above‐average sediment yields in the preceding decade, in part due to the frequent occurrence of moderate ( Q 10 ) years. It is hypothesized that temporary storage of sediment and previous initiation of erosion sites resulted in extraordinary sediment yields during intense summer rainfall events. This study demonstrates the potential use of varved lake sediment records to improve our understanding of long‐term sediment dynamics. These records present an opportunity to further develop and test sediment dynamic and routing models to gain insight into the interaction of time and space in fluvial and sediment delivery processes. Copyright © 2002 John Wiley & Sons, Ltd. |
format |
Article in Journal/Newspaper |
author |
Lamoureux, Scott |
spellingShingle |
Lamoureux, Scott Temporal patterns of suspended sediment yield following moderate to extreme hydrological events recorded in varved lacustrine sediments |
author_facet |
Lamoureux, Scott |
author_sort |
Lamoureux, Scott |
title |
Temporal patterns of suspended sediment yield following moderate to extreme hydrological events recorded in varved lacustrine sediments |
title_short |
Temporal patterns of suspended sediment yield following moderate to extreme hydrological events recorded in varved lacustrine sediments |
title_full |
Temporal patterns of suspended sediment yield following moderate to extreme hydrological events recorded in varved lacustrine sediments |
title_fullStr |
Temporal patterns of suspended sediment yield following moderate to extreme hydrological events recorded in varved lacustrine sediments |
title_full_unstemmed |
Temporal patterns of suspended sediment yield following moderate to extreme hydrological events recorded in varved lacustrine sediments |
title_sort |
temporal patterns of suspended sediment yield following moderate to extreme hydrological events recorded in varved lacustrine sediments |
publisher |
Wiley |
publishDate |
2002 |
url |
http://dx.doi.org/10.1002/esp.399 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fesp.399 https://onlinelibrary.wiley.com/doi/pdf/10.1002/esp.399 |
long_lat |
ENVELOPE(-59.688,-59.688,-62.366,-62.366) ENVELOPE(-59.709,-59.709,-62.343,-62.343) |
geographic |
Arctic Cornwall Cornwall Island |
geographic_facet |
Arctic Cornwall Cornwall Island |
genre |
Arctic Cornwall Island |
genre_facet |
Arctic Cornwall Island |
op_source |
Earth Surface Processes and Landforms volume 27, issue 10, page 1107-1124 ISSN 0197-9337 1096-9837 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/esp.399 |
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Earth Surface Processes and Landforms |
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27 |
container_issue |
10 |
container_start_page |
1107 |
op_container_end_page |
1124 |
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1800747057080696832 |