Radio-echo sounding and ice volume estimates of western Nordenskiöld Land glaciers, Svalbard

Martín-Español, Alba; Vasilenko, E.V.; Navarro, Francisco; Otero, Jaime; Lapazaran, Javier; Lavrentiev, Ivan; Macheret, Yu. Ya.; Machío, Francisco

doi:10.3189/2013aog64a109

Cited by 23 publications

(13 citation statements)

References 24 publications

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“…Airborne GPR data quality and consistency can be evaluated by comparing ice-thicknesses obtained at intersections of different profiles (Martín-Español et al, 2013). The standard deviation of the absolute differences at 107 intersections within the aerial survey is 6.0 m (8.9%).…”

Section: Gprmentioning

confidence: 99%

Volume Changes of Elbrus Glaciers From 1997 to 2017

et al. 2019

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This study describes the analysis of changes in area and volume of the Mt.Elbrus glacier system, Central Caucasus from 1997 to 2017. It is based on helicopter-borne ice thickness measurements, comparison of high-resolution imagery and two digital elevation models (DEMs) with 10 m resolution. More than 250 km of ground-penetrating radar (GPR) profiles of ice thickness with reliable reflections were obtained. The total volume of Mt. Elbrus glaciers was 5.03 ± 0.85 km 3 of ice in 2017. Our results show that 68% of the total ice volume is concentrated below 4,000 m a.s.l. where the average ice thickness was 44.6 ± 7.3 m, 18% of the volume lies within 4,000-4,500 m a.s.l. (thickness of 41.2 ± 7.3 m), and just 14% lies above 4,500 m a.s.l. (thickness of 29.7 ± 6.7 m). The glacier-covered area of Mt. Elbrus decreased from 125.76 ± 0.65 km 2 in 1997 to 112.20 ± 0.58 km 2 in 2017, a reduction of 10.8%. Over the same period the volume decreased by 22.8%. The mass balance of the Elbrus glaciers decreased by −0.55 ± 0.04 m w.e. a −1 from 1997 to 2017. Mass balance on west-oriented glaciers is less negative than on east-and south-oriented glaciers where mass balance is most negative. The mass balance of the east-oriented Djikiugankez glacier decreased at the fastest average rate (−0.97 ± 0.07 m w.e. a −1 ). This glacier contains 28% of the total Elbrus glacier system ice volume, most of which is concentrated below 4,000 m a.s.l. Only one small glacier on the western slope demonstrated mass gain. Our results match well with the long term direct mass balance measurements on the Garabashi glacier on Elbrus which lost 12.58 m w.e. and 12.92 ± 0.95 m w.e. between 1997 and 2017 estimated by glaciological and geodetic method, respectively. The rate of Elbrus glacier mass loss tripled in 1997-2017 compared with the 1957-1997 period.

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Section: Gprmentioning

confidence: 99%

Volume Changes of Elbrus Glaciers From 1997 to 2017

et al. 2019

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“…Of these 36 glaciers, 25 were radio-echo sounded during 1999–2014. Ten of them, located in western Nordenskiöld Land, are reported in Martín-Español and others (2013), and another eight, located in Wedel Jarslberg Land (Fig. 1), are reported in Navarro and others (2014).…”

Section: Datamentioning

confidence: 99%

Estimate of the total volume of Svalbard glaciers, and their potential contribution to sea-level rise, using new regionally based scaling relationships

et al. 2015

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ABSTRACT. We present a set of new volume scaling relationships specific to Svalbard glaciers, derived from a sample of 60 volume-area pairs. Glacier volumes are computed from ground-penetrating radar (GPR)-retrieved ice thickness measurements, which have been compiled from different sources for this study. The most precise scaling models, in terms of lowest cross-validation errors, are obtained using a multivariate approach where, in addition to glacier area, glacier length and elevation range are also used as predictors. Using this multivariate scaling approach, together with the Randolph Glacier Inventory V3.2 for Svalbard and Jan Mayen, we obtain a regional volume estimate of 6700 AE AE 835 km 3 , or 17 AE 2 mm of sea-level equivalent (SLE). This result lies in the mid-to low range of recently published estimates, which show values as varied as 13 and 24 mm SLE. We assess the sensitivity of the scaling exponents to glacier characteristics such as size, aspect ratio and average slope, and find that the volume of steep-slope and cirque-type glaciers is not very sensitive to changes in glacier area.

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“…For Svalbard, ice thickness is relatively well known because of the long research activity comprising deep ice coring (overview in Kotlyakov et al, ), airborne radio‐echo soundings (RESs; Dowdeswell & Bamber, ; Dowdeswell & Drewry, ; Dowdeswell et al, ; Macheret & Zhuravlev, ), and numerous ground‐penetrating radar surveys (overview in ; Martín‐Español et al, ). These records allowed a first tuning of VAS approaches against thickness measurements and their archipelago‐wide application.…”

Section: Introductionmentioning

confidence: 99%

The Ice‐Free Topography of Svalbard

Fürst

Navarro

Gillet-Chaulet

et al. 2018

Geophysical Research Letters

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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 km3, 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 km3. 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).

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Radio-echo sounding and ice volume estimates of western Nordenskiöld Land glaciers, Svalbard

Cited by 23 publications

References 24 publications

Volume Changes of Elbrus Glaciers From 1997 to 2017

Volume Changes of Elbrus Glaciers From 1997 to 2017

Estimate of the total volume of Svalbard glaciers, and their potential contribution to sea-level rise, using new regionally based scaling relationships

The Ice‐Free Topography of Svalbard

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