Zobrazeno 1 - 10
of 123
pro vyhledávání: '"MARK FAHNESTOCK"'
Publikováno v:
Journal of Glaciology, Vol 69, Pp 57-70 (2023)
Arctic ice shelves have declined over the past several decades, one of many indications of a rapidly changing cryosphere. Here we use a collection of off-nadir Landsat 8 images, a 1978 digital orthophotograph and photogrammetrically derived DEM, sate
Externí odkaz:
https://doaj.org/article/94aab07f77d04a4e936582a734b99733
Publikováno v:
Journal of Glaciology, Vol 68, Pp 533-546 (2022)
Passive microwave satellite observations are used to identify the presence of surface meltwater across Antarctica at daily intervals from July 1979 to June 2020, with a focus on ice shelves. Antarctic Peninsula ice shelves have the highest number of
Externí odkaz:
https://doaj.org/article/c8e9953466a94aa8964791fdf4b48228
Publikováno v:
Journal of Glaciology, Vol 67, Pp 385-403 (2021)
Basal motion is the primary mechanism for ice flux in Greenland, yet a widely applicable model for predicting it remains elusive. This is due to the difficulty in both observing small-scale bed properties and predicting a time-varying water pressure
Externí odkaz:
https://doaj.org/article/f0b9c5379e9d422bb635adebf09ebfc0
Autor:
RYAN CASSOTTO, MARK FAHNESTOCK, JASON M. AMUNDSON, MARTIN TRUFFER, MARGARET S. BOETTCHER, SANTIAGO DE LA PEÑA, IAN HOWAT
Publikováno v:
Journal of Glaciology, Vol 65, Pp 39-54 (2019)
Jakobshavn Isbræ, a tidewater glacier that produces some of Greenland's largest icebergs and highest speeds, reached record-high flow rates in 2012 (Joughin and others, 2014). We use terrestrial radar interferometric observations from August 2012 to
Externí odkaz:
https://doaj.org/article/1958095834884ab58b5a0413a5eb436f
Autor:
ROMAN J. MOTYKA, RYAN CASSOTTO, MARTIN TRUFFER, KRISTIAN K. KJELDSEN, DIRK VAN AS, NIELS J. KORSGAARD, MARK FAHNESTOCK, IAN HOWAT, PETER L. LANGEN, JOHN MORTENSEN, KUNUK LENNERT, SØREN RYSGAARD
Publikováno v:
Journal of Glaciology, Vol 63, Pp 288-308 (2017)
We assess ice loss and velocity changes between 1985 and 2014 of three tidewater and five-land terminating glaciers in Godthåbsfjord (Nuup Kangerlua), Greenland. Glacier thinning accounted for 43.8 ± 0.2 km3 of ice loss, equivalent to 0.10 mm eusta
Externí odkaz:
https://doaj.org/article/760060607439430c8694dae951c7fff6
Publikováno v:
Journal of Glaciology. 69:57-70
Arctic ice shelves have declined over the past several decades, one of many indications of a rapidly changing cryosphere. Here we use a collection of off-nadir Landsat 8 images, a 1978 digital orthophotograph and photogrammetrically derived DEM, sate
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::60f259c8149982635577afd0a33c45f1
https://doi.org/10.1017/jog.2022.44
https://doi.org/10.1017/jog.2022.44
Autor:
Federico Covi, Mark Fahnestock, Regine Hock, Jing Xiao, Åsa Rennermalm, Martin Truffer, Matthew Sturm, Carl Benson
The presence of thick ice layers in firn (so-called ice slabs) has the potential to increase the contribution to sea-level rise of the Greenland ice sheet. These impermeable ice layers prevent water percolation in the firn, leading to more efficient
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ea466e45d898886e59c6e7ebbb7d7886
https://doi.org/10.5194/egusphere-egu23-12649
https://doi.org/10.5194/egusphere-egu23-12649
Publikováno v:
Journal of Glaciology. 68:533-546
Passive microwave satellite observations are used to identify the presence of surface meltwater across Antarctica at daily intervals from July 1979 to June 2020, with a focus on ice shelves. Antarctic Peninsula ice shelves have the highest number of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1853f1b8c55f8665568c2cefd2361f90
https://doi.org/10.1017/jog.2021.112
https://doi.org/10.1017/jog.2021.112
Publikováno v:
Nature Geoscience. 14:417-422
The stability of the world’s largest glaciers and ice sheets depends on mechanical and thermodynamic processes occurring at the glacier–ocean boundary. A buoyant agglomeration of icebergs and sea ice, referred to as ice melange, often forms along
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::61fa539d27698c1c0130b35d3aa4271d
https://doi.org/10.1038/s41561-021-00754-9
https://doi.org/10.1038/s41561-021-00754-9
Autor:
Joseph MacGregor, Winnie Chu, William Colgan, Beáta Csathó, Mark Fahnestock, Denis Felikson, Nanna Karlsson, Emma MacKie, Mathieu Morlighem, Guy Paxman, Kirsty Tinto, Lijing Wang
Combining airborne radar-sounding measurements of ice thickness and satellite observations of surface velocity using the principle of mass conservation has revolutionized mapping of subglacial valleys around the periphery of the Greenland Ice Sheet.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::929eee2c00ea689f478eff847a4f23eb
https://doi.org/10.5194/egusphere-egu22-3159
https://doi.org/10.5194/egusphere-egu22-3159