Bedrock displacements in Greenland manifest ice mass variations, climate cycles and climate change

Michael Bevis; John Wahr; Shfaqat A. Khan; Finn Bo Madsen; Abel Brown; Michael Willis; Eric Kendrick; Per Knudsen; Jason E. Box; Tonie van Dam; Dana J. Caccamise; Bjorn Johns; Thomas Nylen; Robin Abbott; Seth White; Jeremy Miner; Rene Forsberg; Hao Zhou; Jian Wang; Terry Wilson; David Bromwich; Olivier Francis

doi:10.1073/pnas.1204664109

Bedrock displacements in Greenland manifest ice mass variations, climate cycles and climate change

Michael Bevis, John Wahr, Shfaqat A. Khan, Finn Bo Madsen, Abel Brown, Michael Willis, Eric Kendrick, Per Knudsen, Jason E. Box, Tonie van Dam, Dana J. Caccamise, Bjorn Johns, Thomas Nylen, Robin Abbott, Seth White, Jeremy Miner, Rene Forsberg, Hao Zhou, Jian Wang, Terry WilsonDavid Bromwich, Olivier Francis

Publikation: Bidrag til tidsskrift › Artikel › Forskning › peer review

115 Citationer (Scopus)

Resumé

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.

Originalsprog	Engelsk
Sider (fra-til)	11944-11948
Antal sider	5
Tidsskrift	Proceedings of the National Academy of Sciences of the United States of America
Vol/bind	109
Udgave nummer	30
DOI	https://doi.org/10.1073/pnas.1204664109
Status	Udgivet - jul. 2012
Udgivet eksternt	Ja

Programområde

Programområde 5: Natur og klima

FN’s Verdensmål

Dette resultat bidrager til følgende verdensmål

Adgang til dokumentet

10.1073/pnas.1204664109Licens: Andet

Citationsformater

Bevis, M., Wahr, J., Khan, S. A., Madsen, F. B., Brown, A., Willis, M., Kendrick, E., Knudsen, P., Box, J. E., van Dam, T., Caccamise, D. J., Johns, B., Nylen, T., Abbott, R., White, S., Miner, J., Forsberg, R., Zhou, H., Wang, J., ... Francis, O. (2012). Bedrock displacements in Greenland manifest ice mass variations, climate cycles and climate change. Proceedings of the National Academy of Sciences of the United States of America, 109(30), 11944-11948. https://doi.org/10.1073/pnas.1204664109

@article{39ae9ec268524bde8d151ec8ea12f09c,

title = "Bedrock displacements in Greenland manifest ice mass variations, climate cycles and climate change",

abstract = "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.",

keywords = "Climate change, Climate cycles, Crustal motion geodesy, Elasticity",

author = "Michael Bevis and John Wahr and Khan, {Shfaqat A.} and Madsen, {Finn Bo} and Abel Brown and Michael Willis and Eric Kendrick and Per Knudsen and Box, {Jason E.} and {van Dam}, Tonie and Caccamise, {Dana J.} and Bjorn Johns and Thomas Nylen and Robin Abbott and Seth White and Jeremy Miner and Rene Forsberg and Hao Zhou and Jian Wang and Terry Wilson and David Bromwich and Olivier Francis",

year = "2012",

month = jul,

doi = "10.1073/pnas.1204664109",

language = "English",

volume = "109",

pages = "11944--11948",

journal = "Proceedings of the National Academy of Sciences of the United States of America",

issn = "0027-8424",

publisher = "National Academy of Sciences",

number = "30",

}

Bevis, M, Wahr, J, Khan, SA, Madsen, FB, Brown, A, Willis, M, Kendrick, E, Knudsen, P, Box, JE, van Dam, T, Caccamise, DJ, Johns, B, Nylen, T, Abbott, R, White, S, Miner, J, Forsberg, R, Zhou, H, Wang, J, Wilson, T, Bromwich, D & Francis, O 2012, 'Bedrock displacements in Greenland manifest ice mass variations, climate cycles and climate change', Proceedings of the National Academy of Sciences of the United States of America, bind 109, nr. 30, s. 11944-11948. https://doi.org/10.1073/pnas.1204664109

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 A.

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.

AU - Johns, Bjorn

AU - Nylen, Thomas

AU - Abbott, Robin

AU - White, Seth

AU - Miner, Jeremy

AU - Forsberg, Rene

AU - Zhou, Hao

AU - Wang, Jian

AU - Wilson, Terry

AU - Bromwich, David

AU - Francis, Olivier

PY - 2012/7

Y1 - 2012/7

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 - Crustal motion geodesy

KW - Elasticity

UR - http://www.scopus.com/inward/record.url?scp=84864327800&partnerID=8YFLogxK

U2 - 10.1073/pnas.1204664109

DO - 10.1073/pnas.1204664109

M3 - Article

C2 - 22786931

AN - SCOPUS:84864327800

SN - 0027-8424

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

IS - 30

ER -

Bedrock displacements in Greenland manifest ice mass variations, climate cycles and climate change

Resumé

Programområde

FN’s Verdensmål

Adgang til dokumentet

Fingeraftryk

Citationsformater