A 750-yr record of autumn snowfall and temperature variability and winter storminess recorded in the varved sediments of Bear Lake, Devon Island, Arctic Canada
The varve record from High Arctic, proglacial Bear Lake reveals a regionally coherent hydroclimatic signal as well as complexities due to changing hydroclimatic and limnologic conditions. Varve formation is strongly dependent on underflows that exhibit variability in strength during the past 750 yr....
Published in: | Quaternary Research |
---|---|
Main Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Cambridge University Press (CUP)
2004
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1016/j.yqres.2003.11.003 http://api.elsevier.com/content/article/PII:S0033589403001704?httpAccept=text/xml http://api.elsevier.com/content/article/PII:S0033589403001704?httpAccept=text/plain https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589400012837 |
id |
crcambridgeupr:10.1016/j.yqres.2003.11.003 |
---|---|
record_format |
openpolar |
spelling |
crcambridgeupr:10.1016/j.yqres.2003.11.003 2024-09-15T17:56:57+00:00 A 750-yr record of autumn snowfall and temperature variability and winter storminess recorded in the varved sediments of Bear Lake, Devon Island, Arctic Canada Lamoureux, Scott F. Gilbert, Robert 2004 http://dx.doi.org/10.1016/j.yqres.2003.11.003 http://api.elsevier.com/content/article/PII:S0033589403001704?httpAccept=text/xml http://api.elsevier.com/content/article/PII:S0033589403001704?httpAccept=text/plain https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589400012837 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Quaternary Research volume 61, issue 2, page 134-147 ISSN 0033-5894 1096-0287 journal-article 2004 crcambridgeupr https://doi.org/10.1016/j.yqres.2003.11.003 2024-07-24T04:03:32Z The varve record from High Arctic, proglacial Bear Lake reveals a regionally coherent hydroclimatic signal as well as complexities due to changing hydroclimatic and limnologic conditions. Varve formation is strongly dependent on underflows that exhibit variability in strength during the past 750 yr. Periods with reduced underflow sedimentation and accumulation rates fail to produce varves in the distal part of the lake. Isolated coarse silt and sand grains occur in 80% of the varves and are interpreted to be niveo-aeolian in origin. Coarse (>500 μm) sand grains deposited on the lake ice by strong winter winds are notably less common since A.D. 1850, likely due to reduced storminess. Regression of the varve thickness record with meteorological records indicates high correlations with autumn (September and October) temperatures and total monthly snowfall. These correlations are best at times when underflow activity is sufficiently strong to produce varves throughout the lake. The close association with warmer temperatures and snow-bearing synoptic systems moving north in Baffin Bay suggests that the primary climate signal in the varves is varying autumn snow pack that controls nival discharge in the following year. The similarity between the other records of melt season temperature and sea-ice cover and the Bear Lake record suggests that summer and autumn conditions were generally similar across the Baffin Bay region through much of the last millennium. Article in Journal/Newspaper Baffin Bay Baffin Bay Baffin Devon Island Sea ice Cambridge University Press Quaternary Research 61 2 134 147 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
description |
The varve record from High Arctic, proglacial Bear Lake reveals a regionally coherent hydroclimatic signal as well as complexities due to changing hydroclimatic and limnologic conditions. Varve formation is strongly dependent on underflows that exhibit variability in strength during the past 750 yr. Periods with reduced underflow sedimentation and accumulation rates fail to produce varves in the distal part of the lake. Isolated coarse silt and sand grains occur in 80% of the varves and are interpreted to be niveo-aeolian in origin. Coarse (>500 μm) sand grains deposited on the lake ice by strong winter winds are notably less common since A.D. 1850, likely due to reduced storminess. Regression of the varve thickness record with meteorological records indicates high correlations with autumn (September and October) temperatures and total monthly snowfall. These correlations are best at times when underflow activity is sufficiently strong to produce varves throughout the lake. The close association with warmer temperatures and snow-bearing synoptic systems moving north in Baffin Bay suggests that the primary climate signal in the varves is varying autumn snow pack that controls nival discharge in the following year. The similarity between the other records of melt season temperature and sea-ice cover and the Bear Lake record suggests that summer and autumn conditions were generally similar across the Baffin Bay region through much of the last millennium. |
format |
Article in Journal/Newspaper |
author |
Lamoureux, Scott F. Gilbert, Robert |
spellingShingle |
Lamoureux, Scott F. Gilbert, Robert A 750-yr record of autumn snowfall and temperature variability and winter storminess recorded in the varved sediments of Bear Lake, Devon Island, Arctic Canada |
author_facet |
Lamoureux, Scott F. Gilbert, Robert |
author_sort |
Lamoureux, Scott F. |
title |
A 750-yr record of autumn snowfall and temperature variability and winter storminess recorded in the varved sediments of Bear Lake, Devon Island, Arctic Canada |
title_short |
A 750-yr record of autumn snowfall and temperature variability and winter storminess recorded in the varved sediments of Bear Lake, Devon Island, Arctic Canada |
title_full |
A 750-yr record of autumn snowfall and temperature variability and winter storminess recorded in the varved sediments of Bear Lake, Devon Island, Arctic Canada |
title_fullStr |
A 750-yr record of autumn snowfall and temperature variability and winter storminess recorded in the varved sediments of Bear Lake, Devon Island, Arctic Canada |
title_full_unstemmed |
A 750-yr record of autumn snowfall and temperature variability and winter storminess recorded in the varved sediments of Bear Lake, Devon Island, Arctic Canada |
title_sort |
750-yr record of autumn snowfall and temperature variability and winter storminess recorded in the varved sediments of bear lake, devon island, arctic canada |
publisher |
Cambridge University Press (CUP) |
publishDate |
2004 |
url |
http://dx.doi.org/10.1016/j.yqres.2003.11.003 http://api.elsevier.com/content/article/PII:S0033589403001704?httpAccept=text/xml http://api.elsevier.com/content/article/PII:S0033589403001704?httpAccept=text/plain https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589400012837 |
genre |
Baffin Bay Baffin Bay Baffin Devon Island Sea ice |
genre_facet |
Baffin Bay Baffin Bay Baffin Devon Island Sea ice |
op_source |
Quaternary Research volume 61, issue 2, page 134-147 ISSN 0033-5894 1096-0287 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1016/j.yqres.2003.11.003 |
container_title |
Quaternary Research |
container_volume |
61 |
container_issue |
2 |
container_start_page |
134 |
op_container_end_page |
147 |
_version_ |
1810433157200084992 |