Zobrazeno 1 - 10
of 155
pro vyhledávání: '"DOUGLAS I. BENN"'
Autor:
William D. Harcourt, Duncan A. Robertson, David G. Macfarlane, Brice R. Rea, Matteo Spagnolo, Douglas I. Benn, Mike R. James
Publikováno v:
Annals of Glaciology, Vol 63, Pp 116-120 (2022)
Close-range sensors are employed to observe glaciological processes that operate over short timescales (e.g. iceberg calving, glacial lake outburst floods, diurnal surface melting). However, under poor weather conditions optical instruments fail whil
Externí odkaz:
https://doaj.org/article/4ab5ad15e85643efbd0c218663c9eddf
Publikováno v:
Annals of Glaciology, Vol 63, Pp 88-94 (2022)
It is commonly asserted that there are two distinct classes of glacier surges: slow, long-duration ‘Svalbard-type’ surges, triggered by a transition from cold- to warm-based conditions (thermal switching), and fast, shorter-duration ‘Alaska-typ
Externí odkaz:
https://doaj.org/article/8146f047d2c541559d14562faaac9042
Autor:
Nanna B. Karlsson, Anne M. Solgaard, Kenneth D. Mankoff, Fabien Gillet-Chaulet, Joseph A. MacGregor, Jason E. Box, Michele Citterio, William T. Colgan, Signe H. Larsen, Kristian K. Kjeldsen, Niels J. Korsgaard, Douglas I. Benn, Ian J. Hewitt, Robert S. Fausto
Publikováno v:
Nature Communications, Vol 12, Iss 1, Pp 1-10 (2021)
Melting at the base of the Greenland Ice Sheet is often disregarded as a source of quantifiable mass loss. In this study, the authors find the basal mass loss is equivalent to 8% of the ice sheet’s present imbalance, and that the loss of mass from
Externí odkaz:
https://doaj.org/article/82d1dd641a264fc68729582276cdbe59
Publikováno v:
Nature Communications, Vol 12, Iss 1, Pp 1-9 (2021)
Ice-cliff failure that leads to marine ice-cliff instability could accelerate Antarctic Ice Sheet retreat. Here, the authors use 3D glacier models to investigate ice-cliff failure, derive a retreat rate relationship, and quantify mélange back force
Externí odkaz:
https://doaj.org/article/76d98a26e5224cb38c552d6e93465f10
Publikováno v:
Journal of Glaciology, Vol 66, Pp 278-290 (2020)
Recent speleological surveys of meltwater drainage systems in cold and polythermal glaciers have documented dynamic englacial and in some cases subglacial conduits formed by the ‘cut-and-closure’ mechanism. Investigations of the spatial distribut
Externí odkaz:
https://doaj.org/article/b8708407b16f4d86889e1d89dd794607
Autor:
Douglas I. Benn, Robert L. Jones, Adrian Luckman, Johannes J. Fürst, Ian Hewitt, Christian Sommer
Publikováno v:
Journal of Glaciology, Vol 65, Pp 717-731 (2019)
Analysis of a recent surge of Morsnevbreen, Svalbard, is used to test predictions of the enthalpy balance theory of surging. High-resolution time series of velocities, ice thickness and crevasse distribution allow key elements of the enthalpy (intern
Externí odkaz:
https://doaj.org/article/dc92a2acb06a47f48295b2c01414b716
Autor:
Penelope How, Kristin M. Schild, Douglas I. Benn, Riko Noormets, Nina Kirchner, Adrian Luckman, Dorothée Vallot, Nicholas R. J. Hulton, Chris Borstad
Publikováno v:
Annals of Glaciology, Vol 60, Pp 20-31 (2019)
We present a highly detailed study of calving dynamics at Tunabreen, a tidewater glacier in Svalbard. A time-lapse camera was trained on the terminus and programmed to capture images every 3 seconds over a 28-hour period in August 2015, producing a h
Externí odkaz:
https://doaj.org/article/406b8942a5c84738ab0a0d6cc11a2498
Autor:
Eef C. H. van Dongen, Jan A. Åström, Guillaume Jouvet, Joe Todd, Douglas I. Benn, Martin Funk
Publikováno v:
Frontiers in Earth Science, Vol 8 (2020)
Projections of future ice sheet mass loss and thus sea level rise rely on the parametrization of iceberg calving in ice sheet models. The interconnection between submarine melt-induced undercutting and calving is still poorly understood, which makes
Externí odkaz:
https://doaj.org/article/61facc20194a4c1885eb139612daac26
Publikováno v:
Frontiers in Earth Science, Vol 8 (2020)
Terrestrial time-lapse photogrammetry is a rapidly growing method for deriving measurements from glacial environments because it provides high spatio-temporal resolution records of change. Currently, however, the potential usefulness of time-lapse da
Externí odkaz:
https://doaj.org/article/c3a7398b11514b508baf0aec0dc97177
Autor:
DOROTHÉE VALLOT, RICKARD PETTERSSON, ADRIAN LUCKMAN, DOUGLAS I. BENN, THOMAS ZWINGER, WARD J. J. VAN PELT, JACK KOHLER, MARTINA SCHÄFER, BJÖRN CLAREMAR, NICHOLAS R. J. HULTON
Publikováno v:
Journal of Glaciology, Vol 63, Pp 1012-1024 (2017)
We evaluate the variability in basal friction for Kronebreen, Svalbard, a fast-flowing tidewater glacier. We invert 3 years (2013–15) of surface velocities at high temporal resolution (generally 11 days), to estimate the changing basal properties o
Externí odkaz:
https://doaj.org/article/0e26959c297e4d2684dea75cb6343a61