Abstract
| Original language | English |
|---|---|
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Volume | 109 |
| Issue number | 30 |
| Pages (from-to) | 11944-11948 |
| ISSN | 0027-8424 |
| DOIs | |
| Publication status | Published - 2012 |
Keywords
- Climate change
- Climate cycles
- Elasticity
- Crustal motion geodesy
Cite this
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Bedrock displacements in Greenland manifest ice mass variations, climate cycles and climate change. / Bevis, Michael; Wahr, John; Khan, Shfaqat Abbas; Madsen, Finn Bo; Brown, Abel; Willis, Michael; Kendrick, Eric; Knudsen, Per; Box, Jason E.; van Dam, Tonie; Caccamise, Dana J., II; Johns, Bjorn; Nylen, Thomas; Abbott, Robin; White, Seth; Miner, Jeremy; Forsberg, René; Zhou, Hao; Wang, Jian; Wilson, Terry; Bromwich, David; Francis, Olivier.
In: Proceedings of the National Academy of Sciences of the United States of America, Vol. 109, No. 30, 2012, p. 11944-11948.Research output: Contribution to journal › Journal article › Research › peer-review
TY - JOUR
T1 - Bedrock displacements in Greenland manifest ice mass variations, climate cycles and climate change
AU - Bevis, Michael
AU - Wahr, John
AU - Khan, Shfaqat Abbas
AU - Madsen, Finn Bo
AU - Brown, Abel
AU - Willis, Michael
AU - Kendrick, Eric
AU - Knudsen, Per
AU - Box, Jason E.
AU - van Dam, Tonie
AU - Caccamise, Dana J., II
AU - Johns, Bjorn
AU - Nylen, Thomas
AU - Abbott, Robin
AU - White, Seth
AU - Miner, Jeremy
AU - Forsberg, René
AU - Zhou, Hao
AU - Wang, Jian
AU - Wilson, Terry
AU - Bromwich, David
AU - Francis, Olivier
PY - 2012
Y1 - 2012
N2 - The Greenland GPS Network (GNET) uses the Global Positioning System (GPS) to measure the displacement of bedrock exposed near the margins of the Greenland ice sheet. The entire network is uplifting in response to past and present-day changes in ice mass. Crustal displacement is largely accounted for by an annual oscillation superimposed on a sustained trend. The oscillation is driven by earth’s elastic response to seasonal variations in ice mass and air mass (i.e., atmospheric pressure). Observed vertical velocities are higher and often much higher than predicted rates of postglacial rebound (PGR), implying that uplift is usually dominated by the solid earth’s instantaneous elastic response to contemporary losses in ice mass rather than PGR. Superimposed on longer-term trends, an anomalous ‘pulse’ of uplift accumulated at many GNET stations during an approximate six-month period in 2010. This anomalous uplift is spatially correlated with the 2010 melting day anomaly.
AB - The Greenland GPS Network (GNET) uses the Global Positioning System (GPS) to measure the displacement of bedrock exposed near the margins of the Greenland ice sheet. The entire network is uplifting in response to past and present-day changes in ice mass. Crustal displacement is largely accounted for by an annual oscillation superimposed on a sustained trend. The oscillation is driven by earth’s elastic response to seasonal variations in ice mass and air mass (i.e., atmospheric pressure). Observed vertical velocities are higher and often much higher than predicted rates of postglacial rebound (PGR), implying that uplift is usually dominated by the solid earth’s instantaneous elastic response to contemporary losses in ice mass rather than PGR. Superimposed on longer-term trends, an anomalous ‘pulse’ of uplift accumulated at many GNET stations during an approximate six-month period in 2010. This anomalous uplift is spatially correlated with the 2010 melting day anomaly.
KW - Climate change
KW - Climate cycles
KW - Elasticity
KW - Crustal motion geodesy
U2 - 10.1073/pnas.1204664109
DO - 10.1073/pnas.1204664109
M3 - Journal article
VL - 109
SP - 11944
EP - 11948
JO - Proceedings of the National Academy of Sciences of the United States of America
JF - Proceedings of the National Academy of Sciences of the United States of America
SN - 0027-8424
IS - 30
ER -