Climate-driven vertical acceleration of Icelandic crust measured by continuous GPS geodesy

Handle URI:
http://hdl.handle.net/10754/597783
Title:
Climate-driven vertical acceleration of Icelandic crust measured by continuous GPS geodesy
Authors:
Compton, Kathleen; Bennett, Richard A.; Hreinsdóttir, Sigrún
Abstract:
© 2015 The Authors. Earth's present-day response to enhanced glacial melting resulting from climate change can be measured using Global Positioning System (GPS) technology. We present data from 62 continuously operating GPS instruments in Iceland. Statistically significant upward velocity and accelerations are recorded at 27 GPS stations, predominantly located in the Central Highlands region of Iceland, where present-day thinning of the Iceland ice caps results in velocities of more than 30mm/yr and uplift accelerations of 1-2mm/yr<sup>2</sup>. We use our acceleration estimates to back calculate to a time of zero velocity, which coincides with the initiation of ice loss in Iceland from ice mass balance calculations and Arctic warming trends. We show, through a simple inversion, a direct relationship between ice mass balance measurements and vertical position and show that accelerated unloading is required to reproduce uplift observations for a simple elastic layer over viscoelastic half-space model.
Citation:
Compton K, Bennett RA, Hreinsdóttir S (2015) Climate-driven vertical acceleration of Icelandic crust measured by continuous GPS geodesy. Geophysical Research Letters 42: 743–750. Available: http://dx.doi.org/10.1002/2014GL062446.
Publisher:
Wiley-Blackwell
Journal:
Geophysical Research Letters
Issue Date:
6-Feb-2015
DOI:
10.1002/2014GL062446
Type:
Article
ISSN:
0094-8276
Sponsors:
Data presented in Figure 1 are available in Table S1 in the supporting information. K.C. is funded by NSF Graduate Research Fellowship award DGE-1143953 and the P.E.O. Scholar Award. The Central Highlands Iceland GPS network was funded by the University of Arizona and grants from NSF (EAR-0711446 to the University of Arizona) and the Icelandic Center for Research RANNIS (60243011 to the Nordic Volcanological Center, University of Iceland). Installation and operation of additional sites used in this study were led by the Icelandic Meteorological Office (IMO), University of Iceland, Penn State, ETH, Landmælingar Íslands, Landsvirkjun, Université de Savoie, Bayerische Akademie der Wissenschaften, and KAUST. REYK and HOFN are International GNSS Service stations. UNAVCO and the IMO provided the technical support.
Appears in Collections:
Publications Acknowledging KAUST Support

Full metadata record

DC FieldValue Language
dc.contributor.authorCompton, Kathleenen
dc.contributor.authorBennett, Richard A.en
dc.contributor.authorHreinsdóttir, Sigrúnen
dc.date.accessioned2016-02-25T12:56:39Zen
dc.date.available2016-02-25T12:56:39Zen
dc.date.issued2015-02-06en
dc.identifier.citationCompton K, Bennett RA, Hreinsdóttir S (2015) Climate-driven vertical acceleration of Icelandic crust measured by continuous GPS geodesy. Geophysical Research Letters 42: 743–750. Available: http://dx.doi.org/10.1002/2014GL062446.en
dc.identifier.issn0094-8276en
dc.identifier.doi10.1002/2014GL062446en
dc.identifier.urihttp://hdl.handle.net/10754/597783en
dc.description.abstract© 2015 The Authors. Earth's present-day response to enhanced glacial melting resulting from climate change can be measured using Global Positioning System (GPS) technology. We present data from 62 continuously operating GPS instruments in Iceland. Statistically significant upward velocity and accelerations are recorded at 27 GPS stations, predominantly located in the Central Highlands region of Iceland, where present-day thinning of the Iceland ice caps results in velocities of more than 30mm/yr and uplift accelerations of 1-2mm/yr<sup>2</sup>. We use our acceleration estimates to back calculate to a time of zero velocity, which coincides with the initiation of ice loss in Iceland from ice mass balance calculations and Arctic warming trends. We show, through a simple inversion, a direct relationship between ice mass balance measurements and vertical position and show that accelerated unloading is required to reproduce uplift observations for a simple elastic layer over viscoelastic half-space model.en
dc.description.sponsorshipData presented in Figure 1 are available in Table S1 in the supporting information. K.C. is funded by NSF Graduate Research Fellowship award DGE-1143953 and the P.E.O. Scholar Award. The Central Highlands Iceland GPS network was funded by the University of Arizona and grants from NSF (EAR-0711446 to the University of Arizona) and the Icelandic Center for Research RANNIS (60243011 to the Nordic Volcanological Center, University of Iceland). Installation and operation of additional sites used in this study were led by the Icelandic Meteorological Office (IMO), University of Iceland, Penn State, ETH, Landmælingar Íslands, Landsvirkjun, Université de Savoie, Bayerische Akademie der Wissenschaften, and KAUST. REYK and HOFN are International GNSS Service stations. UNAVCO and the IMO provided the technical support.en
dc.publisherWiley-Blackwellen
dc.subjectclimate changeen
dc.subjectglacial isostatic adjustmenten
dc.subjectGPS geodesyen
dc.subjectIcelanden
dc.subjectupliften
dc.titleClimate-driven vertical acceleration of Icelandic crust measured by continuous GPS geodesyen
dc.typeArticleen
dc.identifier.journalGeophysical Research Lettersen
dc.contributor.institutionDepartment of Geosciences; University of Arizona; Tucson Arizona USAen
dc.contributor.institutionInstitute of Earth Sciences; University of Iceland; Reykjavik Icelanden
dc.contributor.institutionNow at GNS Science; Avalon New Zealanden
All Items in KAUST are protected by copyright, with all rights reserved, unless otherwise indicated.