Surface elevation change and mass balance of Icelandic ice caps derived from swath mode CryoSat-2 altimetry

L. Foresta, N. Gourmelen, F. Pálsson, P. Nienow, H. Björnsson, A. Shepherd

Rannsóknarafurð: Framlag til fræðitímaritsGreinritrýni

41 Tilvitnanir (Scopus)

Útdráttur

We apply swath processing to CryoSat-2 interferometric mode data acquired over the Icelandic ice caps to generate maps of rates of surface elevation change at 0.5 km postings. This high-resolution mapping reveals complex surface elevation changes in the region, related to climate, ice dynamics, and subglacial geothermal and magmatic processes. We estimate rates of volume and mass change independently for the six major Icelandic ice caps, 90% of Iceland's permanent ice cover, for five glaciological years between October 2010 and September 2015. Annual mass balance is highly variable; during the 2014/2015 glaciological year, the Vatnajökull ice cap (~70% of the glaciated area) experienced positive mass balance for the first time since 1992/1993. Our results indicate that between glaciological years 2010/2011and 2014/2015 Icelandic ice caps have lost 5.8 ± 0.7 Gt a−1 on average, ~40% less than the preceding 15 years, contributing 0.016 ± 0.002 mm a−1 to sea level rise.

Upprunalegt tungumálEnska
Síður (frá-til)12,138-12,145
FræðitímaritGeophysical Research Letters
Bindi43
Númer tölublaðs23
DOI
ÚtgáfustaðaÚtgefið - 16 des. 2016

Athugasemd

Publisher Copyright:
©2016. American Geophysical Union. All Rights Reserved.

Fingerprint

Sökktu þér í rannsóknarefni „Surface elevation change and mass balance of Icelandic ice caps derived from swath mode CryoSat-2 altimetry“. Saman myndar þetta einstakt fingrafar.

Vitna í þetta