Мақола

The Ice‐Free Topography of Svalbard

Johannes J. FürstInstitute of Geography University of Erlangen‐Nuremberg Erlangen GermanyFrancisco NavarroDepartamento de Matemática Aplicada a las Tecnologías de la Información y las Comunicaciones ETSI de Telecomunicación, Universidad Politécnica de Madrid Madrid SpainFabien Gillet‐ChauletInstitut des Géosciences de l'Environnement Grenoble FranceMatthias HussDepartment of Geosciences University of Fribourg Fribourg SwitzerlandGeir MoholdtNorwegian Polar Institute, Fram Centre Tromsø NorwayXavier FettweisDepartment of Geography University of Liège Liège BelgiumCharlotte LangDepartment of Geography University of Liège Liège BelgiumThorsten SeehausInstitute of Geography University of Erlangen‐Nuremberg Erlangen GermanySongtao AiChinese Antarctic Center of Surveying and Mapping Wuhan University Wuhan ChinaToby BenhamScott Polar Research Institute University of Cambridge Cambridge UKDouglas I. BennSt Andrews Glaciology, School of Geography and Sustainable Development University of St Andrews St Andrews UKHelgi BjörnssonInstitute of Earth Sciences University of Iceland Reykjavík IcelandJulian A. DowdeswellScott Polar Research Institute University of Cambridge Cambridge UKMariusz GrabiecFaculty of Earth Sciences University of Silesia in Katowice Katowice PolandJack KohlerNorwegian Polar Institute, Fram Centre Tromsø NorwayIvan LavrentievInstitute of Geography Russian Academy of Sciences Moscow RussiaKatrin LindbäckNorwegian Polar Institute, Fram Centre Tromsø NorwayKjetil MelvoldDepartment of Geosciences University of Fribourg Fribourg SwitzerlandRickard PetterssonDepartment of Earth Sciences, Geocentrum Uppsala University Uppsala SwedenDavid M. RippinEnvironment Department University of York York UKAlbane SaintenoyGEOPS, Université Paris‐Sud, CNRS, Université Paris‐Saclay Orsay FrancePablo Sánchez-GamezDepartamento de Matemática Aplicada a las Tecnologías de la Información y las Comunicaciones ETSI de Telecomunicación, Universidad Politécnica de Madrid Madrid SpainThomas V. SchulerDepartment of Arctic Geophysics UNIS University Center on Svalbard Longyearbyen NorwayHeïdi SevestreSt Andrews Glaciology, School of Geography and Sustainable Development University of St Andrews St Andrews UKE.V. VasilenkoInstitute of Industrial Research Akadempribor Academy of Sciences of Uzbekistan Tashkent UzbekistanMatthias BraunInstitute of Geography University of Erlangen‐Nuremberg Erlangen Germany

Geophysical Research Lettersjournal2018en

ABI

Аннотация

Abstract 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).

Ҳали таржима қилинмаган

Мавзулар

Cryospheric studies and observations Arctic and Antarctic ice dynamics Climate change and permafrost

Идентификаторлар

DOI: 10.1029/2018gl079734

Иқтибослар ва манбалар

0 та иқтибос73 та фойдаланилган манба

Кўрсаткичлар — AkademScholar