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The Ice-Free Topogr...
The Ice-Free Topography of Svalbard
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- Fuerst, Johannes J. (författare)
- Univ Erlangen Nurnberg, Inst Geog, Erlangen, Germany
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- Navarro, Francisco (författare)
- Univ Politecn Madrid, Dept Matemat Aplicada Tecnol Informac & Comunicac, ETSI Telecomunicac, Madrid, Spain
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- Gillet-Chaulet, Fabien (författare)
- Inst Geosci Environm, Grenoble, France;Univ Grenoble Alpes, CNRS, IRD, Grenoble INP,IGE, Grenoble, France
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- Huss, Matthias (författare)
- Univ Fribourg, Dept Geosci, Fribourg, Switzerland;Swiss Fed Inst Technol, Lab Hydraul Hydrol & Glaciol, Zurich, Switzerland
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- Moholdt, Geir (författare)
- Norwegian Polar Res Inst, Fram Ctr, Tromso, Norway
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- Fettweis, Xavier (författare)
- Univ Liege, Dept Geog, Liege, Belgium
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- Lang, Charlotte (författare)
- Univ Liege, Dept Geog, Liege, Belgium
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- Seehaus, Thorsten (författare)
- Univ Erlangen Nurnberg, Inst Geog, Erlangen, Germany
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- Ai, Songtao (författare)
- Wuhan Univ, Chinese Antarctic Ctr Surveying & Mapping, Wuhan, Hubei, Peoples R China
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- Benham, Toby J. (författare)
- Univ Cambridge, Scott Polar Res Inst, Cambridge, England
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- Benn, Douglas I. (författare)
- Univ St Andrews, St Andrews Glaciol, Sch Geog & Sustainable Dev, St Andrews, Fife, Scotland
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- Bjornsson, Helgi (författare)
- Univ Iceland, Inst Earth Sci, Reykjavik, Iceland
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- Dowdeswell, Julian A. (författare)
- Univ Cambridge, Scott Polar Res Inst, Cambridge, England
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- Grabiec, Mariusz (författare)
- Univ Silesia Katowice, Fac Earth Sci, Katowice, Poland
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- Kohler, Jack (författare)
- Norwegian Polar Res Inst, Fram Ctr, Tromso, Norway
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- Lavrentiev, Ivan (författare)
- Russian Acad Sci, Inst Geog, Moscow, Russia
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- Lindback, Katrin (författare)
- Norwegian Polar Res Inst, Fram Ctr, Tromso, Norway
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- Melvold, Kjetil (författare)
- Univ Erlangen Nurnberg, Inst Geog, Erlangen, Germany;Univ Fribourg, Dept Geosci, Fribourg, Switzerland;Norwegian Water Resources & Energy Directorate NV, Oslo, Norway
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- Pettersson, Rickard (författare)
- Uppsala universitet,Luft-, vatten- och landskapslära
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- Rippin, David (författare)
- Univ York, Dept Environm, York, N Yorkshire, England
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- Saintenoy, Albane (författare)
- Univ Paris Saclay, Univ Paris Sud, GEOPS, CNRS, Orsay, France
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- Sanchez-Gamez, Pablo (författare)
- Departamento de Matemática Aplicada a las Tecnologías de la Información y las Comunicaciones, ETSI de Telecomunicación, Universidad Politécnica de Madrid, , Madrid, Spain
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- Schuler, Thomas V. (författare)
- Univ Oslo, Dept Geosci, Oslo, Norway;UNIS Univ Ctr Svalbard, Dept Arctic Geophys, Longyearbyen, Norway
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- Sevestre, Heidi (författare)
- Univ St Andrews, St Andrews Glaciol, Sch Geog & Sustainable Dev, St Andrews, Fife, Scotland
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- Vasilenko, Evgeny (författare)
- Acad Sci Uzbek, Inst Ind Res Akadempribor, Tashkent, Uzbekistan
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- Braun, Matthias H. (författare)
- Univ Erlangen Nurnberg, Inst Geog, Erlangen, Germany
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(creator_code:org_t)
- 2018
- 2018
- Engelska.
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Ingår i: Geophysical Research Letters. - 0094-8276 .- 1944-8007. ; 45:21, s. 11760-11769
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- We present a first version of the Svalbard ice-free topography (SVIFT1.0) using a mass conserving approach for mapping glacier ice thickness. SVIFT1.0 is informed by more than 1 million point measurements, totalling more than 8,700 km of thickness profiles. SVIFT1.0 is publicly available and represents the geometric state around the year 2010. Our estimate for the total ice volume is 6,199 km(3), equivalent to 1.5-cm sea level rise. The thickness map suggests that 13% of the glacierized area is grounded below sea level. A complementary map of error estimates comprises uncertainties in the thickness surveys as well as in other input variables. Aggregated error estimates are used to define a likely ice-volume range of 5,200-7,300 km(3). The ice front thickness of marine-terminating glaciers is a key quantity for ice loss attribution because it controls the potential ice discharge by iceberg calving into the ocean. We find a mean ice front thickness of 135 m for the archipelago (likely range 123-158 m). Plain Language Summary Svalbard is an archipelago in the Arctic, north of Norway, which is comparable in size to the New York metropolitan area. Roughly half of it is covered by glacier ice. Yet to this day, the ice volume stored in the many glaciers on Svalbard is not well known. Many attempts have been made to infer a total volume estimate, but results differ substantially. This surprises because of the long research activity in this area. A large record of more than 1 million thickness measurements exists, making Svalbard an ideal study area for the application of a state-of-the-art mapping approach for glacier ice thickness. The mapping approach computes an ice volume that will raise global sea level by more than half an inch if instantaneously melted. If spread over the metropolitan area, New York would be buried beneath a 100-m ice cover. The asset of this approach is that it provides not only a thickness map for each glacier on the archipelago but also an error map that defines the likely local thickness range. Finally, we provide the first well-informed estimate of the ice front thickness of all marine-terminating glaciers that loose icebergs to the ocean. The archipelago-wide mean ice front cliff is 135 m.
Ämnesord
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Naturgeografi (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Physical Geography (hsv//eng)
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Fuerst, Johannes ...
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Navarro, Francis ...
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Gillet-Chaulet, ...
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Huss, Matthias
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Moholdt, Geir
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Fettweis, Xavier
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Lang, Charlotte
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Seehaus, Thorste ...
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Ai, Songtao
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Benham, Toby J.
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Benn, Douglas I.
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Bjornsson, Helgi
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Dowdeswell, Juli ...
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Grabiec, Mariusz
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Kohler, Jack
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Lavrentiev, Ivan
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Lindback, Katrin
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Melvold, Kjetil
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Pettersson, Rick ...
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Rippin, David
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Saintenoy, Alban ...
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Sanchez-Gamez, P ...
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Schuler, Thomas ...
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Sevestre, Heidi
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Vasilenko, Evgen ...
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Braun, Matthias ...
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