Heterogeneous Changes in Western North American Glaciers Linked to Decadal Variability in Zonal Wind Strength
Brian Menounos, Romain Hugonnet, David Shean, Alex Gardner, I. M. Howat, Étienne Berthier, Ben M. Pelto, C. Tennant, J. M. Shea, Myoung‐Jong Noh, Fanny Brun, Amaury Dehecq
Abstract
Western North American (WNA) glaciers outside of Alaska cover 14,384 km2 of mountainous terrain. No comprehensive analysis of recent mass change exists for this region. We generated over 15,000 multisensor digital elevation models from spaceborne optical imagery to provide an assessment of mass change for WNA over the period 2000–2018. These glaciers lost 117 ± 42 gigatons (Gt) of mass, which accounts for up to 0.32 ± 0.11 mm of sea level rise over the full period of study. We observe a fourfold increase in mass loss rates between 2000–2009 [−2.9 ± 3.1 Gt yr−1] and 2009–2018 [−12.3 ± 4.6 Gt yr−1], and we attribute this change to a shift in regional meteorological conditions driven by the location and strength of upper level zonal wind. Our results document decadal‐scale climate variability over WNA that will likely modulate glacier mass change in the future.- Cite:
- Brian Menounos, Romain Hugonnet, David Shean, Alex Gardner, I. M. Howat, Étienne Berthier, Ben M. Pelto, C. Tennant, J. M. Shea, Myoung‐Jong Noh, Fanny Brun, and Amaury Dehecq. 2019. Heterogeneous Changes in Western North American Glaciers Linked to Decadal Variability in Zonal Wind Strength. Geophysical Research Letters, Volume 46, Issue 1, 46(1):200–209.
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@article{Menounos-2019-Heterogeneous,
title = "Heterogeneous Changes in Western North American Glaciers Linked to Decadal Variability in Zonal Wind Strength",
author = "Menounos, Brian and
Hugonnet, Romain and
Shean, David and
Gardner, Alex and
Howat, I. M. and
Berthier, {\'E}tienne and
Pelto, Ben M. and
Tennant, C. and
Shea, J. M. and
Noh, Myoung‐Jong and
Brun, Fanny and
Dehecq, Amaury",
journal = "Geophysical Research Letters, Volume 46, Issue 1",
volume = "46",
number = "1",
year = "2019",
publisher = "American Geophysical Union (AGU)",
url = "https://gwf-uwaterloo.github.io/gwf-publications/G19-116001",
doi = "10.1029/2018gl080942",
pages = "200--209",
abstract = "Western North American (WNA) glaciers outside of Alaska cover 14,384 km2 of mountainous terrain. No comprehensive analysis of recent mass change exists for this region. We generated over 15,000 multisensor digital elevation models from spaceborne optical imagery to provide an assessment of mass change for WNA over the period 2000{--}2018. These glaciers lost 117 {\mbox{$\pm$}} 42 gigatons (Gt) of mass, which accounts for up to 0.32 {\mbox{$\pm$}} 0.11 mm of sea level rise over the full period of study. We observe a fourfold increase in mass loss rates between 2000{--}2009 [−2.9 {\mbox{$\pm$}} 3.1 Gt yr−1] and 2009{--}2018 [−12.3 {\mbox{$\pm$}} 4.6 Gt yr−1], and we attribute this change to a shift in regional meteorological conditions driven by the location and strength of upper level zonal wind. Our results document decadal‐scale climate variability over WNA that will likely modulate glacier mass change in the future.",
}
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<abstract>Western North American (WNA) glaciers outside of Alaska cover 14,384 km2 of mountainous terrain. No comprehensive analysis of recent mass change exists for this region. We generated over 15,000 multisensor digital elevation models from spaceborne optical imagery to provide an assessment of mass change for WNA over the period 2000–2018. These glaciers lost 117 \pm 42 gigatons (Gt) of mass, which accounts for up to 0.32 \pm 0.11 mm of sea level rise over the full period of study. We observe a fourfold increase in mass loss rates between 2000–2009 [−2.9 \pm 3.1 Gt yr−1] and 2009–2018 [−12.3 \pm 4.6 Gt yr−1], and we attribute this change to a shift in regional meteorological conditions driven by the location and strength of upper level zonal wind. Our results document decadal‐scale climate variability over WNA that will likely modulate glacier mass change in the future.</abstract>
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%0 Journal Article %T Heterogeneous Changes in Western North American Glaciers Linked to Decadal Variability in Zonal Wind Strength %A Menounos, Brian %A Hugonnet, Romain %A Shean, David %A Gardner, Alex %A Howat, I. M. %A Berthier, Étienne %A Pelto, Ben M. %A Tennant, C. %A Shea, J. M. %A Noh, Myoung‐Jong %A Brun, Fanny %A Dehecq, Amaury %J Geophysical Research Letters, Volume 46, Issue 1 %D 2019 %V 46 %N 1 %I American Geophysical Union (AGU) %F Menounos-2019-Heterogeneous %X Western North American (WNA) glaciers outside of Alaska cover 14,384 km2 of mountainous terrain. No comprehensive analysis of recent mass change exists for this region. We generated over 15,000 multisensor digital elevation models from spaceborne optical imagery to provide an assessment of mass change for WNA over the period 2000–2018. These glaciers lost 117 \pm 42 gigatons (Gt) of mass, which accounts for up to 0.32 \pm 0.11 mm of sea level rise over the full period of study. We observe a fourfold increase in mass loss rates between 2000–2009 [−2.9 \pm 3.1 Gt yr−1] and 2009–2018 [−12.3 \pm 4.6 Gt yr−1], and we attribute this change to a shift in regional meteorological conditions driven by the location and strength of upper level zonal wind. Our results document decadal‐scale climate variability over WNA that will likely modulate glacier mass change in the future. %R 10.1029/2018gl080942 %U https://gwf-uwaterloo.github.io/gwf-publications/G19-116001 %U https://doi.org/10.1029/2018gl080942 %P 200-209
Markdown (Informal)
[Heterogeneous Changes in Western North American Glaciers Linked to Decadal Variability in Zonal Wind Strength](https://gwf-uwaterloo.github.io/gwf-publications/G19-116001) (Menounos et al., GWF 2019)
- Heterogeneous Changes in Western North American Glaciers Linked to Decadal Variability in Zonal Wind Strength (Menounos et al., GWF 2019)
ACL
- Brian Menounos, Romain Hugonnet, David Shean, Alex Gardner, I. M. Howat, Étienne Berthier, Ben M. Pelto, C. Tennant, J. M. Shea, Myoung‐Jong Noh, Fanny Brun, and Amaury Dehecq. 2019. Heterogeneous Changes in Western North American Glaciers Linked to Decadal Variability in Zonal Wind Strength. Geophysical Research Letters, Volume 46, Issue 1, 46(1):200–209.