![]() Francis, Olivier ![]() in Codignola, Luca; Schrogl, Kai-Uwe; Lukaszczyk, Agnieszka (Eds.) et al Humans in Outer Space - Interdisciplinary Odysseys (2009) Detailed reference viewed: 55 (1 UL)![]() Francis, Olivier ![]() Report (2008) Detailed reference viewed: 44 (1 UL)![]() ; ; et al Scientific Conference (2008, January 14) Detailed reference viewed: 79 (2 UL)![]() ; ; et al in Peshekhonov, Vladimir (Ed.) Proceedings of the International Symposium on Terrestrial Gravimetry: static and mobile measurements (2008) Detailed reference viewed: 39 (2 UL)![]() ; Francis, Olivier ![]() in Peshekhonov, Vladimir (Ed.) Proceedings of the International Symposium on Terrestrial Gravimetry: static and mobile measurements (2008) Detailed reference viewed: 88 (1 UL)![]() ; ; et al in Journal of Geophysical Research (2008) We analyze data from seven continuous Global Positioning System (GPS) receivers and one tide gauge, all located along the edge of the Greenland ice sheet, to determine vertical uplift rates. We compare ... [more ▼] We analyze data from seven continuous Global Positioning System (GPS) receivers and one tide gauge, all located along the edge of the Greenland ice sheet, to determine vertical uplift rates. We compare our results with predictions based on the ICE-5G deglaciation model of Peltier (2004). Results from the GPS receiver at Kellyville (-1.2 ± 1.1 mm/a) and from the tide gauge at Nuuk (-2.2 ± 1.3 mm/a), indicate that ICE-5G overestimates the subsidence rates at those locations by 2.1 and 1.1 mm/a, respectively. Kellyville and Nuuk are located along the southwestern margin of the Greenland ice sheet, and the observed negative uplift rates are consistent with independent evidence that the ice margin along the southwestern edge readvanced during the last ~8 ka to its current position. The ICE-5G glaciation-deglaciation history includes a readvance between the latitudes of 62°N and 72°N. The GPS measurements suggest the ICE-5G readvance may be too large or mistimed. Our GPS results at Qaqortoq, located at the southern tip of Greenland, suggest a secular subsidence rate of 0.3 ± 1.1 mm/a, while ICE-5G predicts an uplift rate of 1.0 mm/a. ICE-5G assumes no ice sheet readvance in south Greenland, including no readvance of the Qassimiut lobe. The difference of 1.3 ± 1.1 mm/a can tentatively be explained as due to a ~33 km readvance of the Qassimiut lobe during the last ~3 ka. For the other GPS sites, the observed/predicted uplift rates are 3.6 ± 1.1/-0.1 mm/a at Thule, 0.0 ± 1.1/2.0 mm/a at Scoresbysund, and -0.4 ± 1.1/-1.7 mm/a at Kulusuk. For Thule, Kulusuk, and Scoresbysund the differences between the observed and predicted rates are on the order of 1.3 – 3.7 mm/a, though with opposite signs, and indicate that ICE-5G does not exactly reproduce the correct rebound signal at those locations. [less ▲] Detailed reference viewed: 145 (6 UL)![]() Francis, Olivier ![]() Report (2007) Detailed reference viewed: 52 (2 UL)![]() ; ; et al in Geophysical Research Letters (2007), 34(L21701), 1-6 The rapid unloading of ice from the southeastern sector of the Greenland ice sheet between 2001 and 2006 caused an elastic uplift of ~35 mm at a GPS site in Kulusuk. Most of the uplift results from ice ... [more ▼] The rapid unloading of ice from the southeastern sector of the Greenland ice sheet between 2001 and 2006 caused an elastic uplift of ~35 mm at a GPS site in Kulusuk. Most of the uplift results from ice dynamic-induced volume losses on two nearby outlet glaciers. Volume loss from Helheim Glacier, calculated from sequential digital elevation models, contributes about ~16 mm of the observed uplift, with an additional ~5 mm from volume loss of Kangerdlugssuaq Glacier. The remaining uplift signal is attributed to significant melt-induced ice volume loss from the ice sheet margin along the southeast coast between 62°N and 66°N. [less ▲] Detailed reference viewed: 84 (6 UL)![]() ; Francis, Olivier ![]() in Journal of Geodesy (2007), 81(5), 337-344 Detailed reference viewed: 112 (5 UL)![]() ; ; et al in Kilicoglu, Ali; Forsberg, Rene (Eds.) Gravity Field of the Earth: Proceedings of the 1st International Symposium of the International Gravity Field Service (2007) Detailed reference viewed: 47 (1 UL)![]() ; ; et al in Kilicoglu, Ali; Forsberg, Rene (Eds.) Gravity Field of the Earth: Proceedings of the 1st International Symposium of the International Gravity Field Service (2007) Detailed reference viewed: 47 (5 UL)![]() ; ; et al Report (2006) Detailed reference viewed: 93 (3 UL)![]() Francis, Olivier ![]() Report (2006) Detailed reference viewed: 57 (1 UL)![]() Francis, Olivier ![]() Report (2006) Detailed reference viewed: 55 (2 UL)![]() Francis, Olivier ![]() ![]() Book published by Centre Européen de Géodynamique et de Séismologie (2006) Detailed reference viewed: 43 (5 UL)![]() ; ; et al in Ocean Dynamics (2006), 56(5-6), 394--415 Detailed reference viewed: 134 (2 UL)![]() ; ; et al in Journal of Geodynamics (2006), 41(1-3), 234-241 Detailed reference viewed: 90 (0 UL)![]() Francis, Olivier ![]() ![]() in Francis, Olivier; van Dam, Tonie (Eds.) International Comparison of Absolute Gravimeters in Walferdange (Luxembourg) of November 2003 (2006) Detailed reference viewed: 89 (2 UL)![]() ; Francis, Olivier ![]() in Metrologia (2006), 43(5), 414 Detailed reference viewed: 108 (2 UL)![]() ; ; et al in Geophysical Journal International (2006), 165(3), 729-743 Detailed reference viewed: 94 (0 UL) |
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