Zobrazeno 1 - 10
of 27
pro vyhledávání: '"J. A. Dowdeswell"'
Autor:
K. A. Hogan, K. L. P. Warburton, A. G. C. Graham, J. A. Neufeld, D. R. Hewitt, J. A. Dowdeswell, R. D. Larter
Publikováno v:
The Cryosphere, Vol 17, Pp 2645-2664 (2023)
Improvements in the resolution of sea-floor mapping techniques have revealed extremely regular, sub-metre-scale ridge landforms produced by the tidal flexure of ice-shelf grounding lines as they retreated very rapidly (i.e. at rates of several kilome
Externí odkaz:
https://doaj.org/article/bfe705dfaee04880802c10530208f5a0
Publikováno v:
The Cryosphere, Vol 16, Pp 2449-2470 (2022)
We present an approach for extracting quantifiable information from archival aerial photographs to extend the temporal record of change over a region of the central eastern Greenland Ice Sheet. The photographs we use were gathered in the 1930s as par
Externí odkaz:
https://doaj.org/article/e6b96645a802431e9a290a52f882ff76
Publikováno v:
Nature Communications, Vol 11, Iss 1, Pp 1-7 (2020)
Northeast Atlantic climate shifted into the Quaternary Ice Age around 2.6 Myr ago. Here, the authors use 3D seismic data from the northern North Sea to document detailed changes in continental-margin sedimentary architecture spanning the transition f
Externí odkaz:
https://doaj.org/article/55a6e85d904b4be5a9f7cea0961df5bd
Publikováno v:
Лëд и снег, Vol 60, Iss 1, Pp 19-28 (2020)
We have determined the ice-surface velocities of the Academy of Sciences Ice Cap, Severnaya Zemlya, Russian Arctic, during the period November 2016 – November 2017, using intensity offset-tracking of Sentinel-1 synthetic-aperture radar images. We u
Externí odkaz:
https://doaj.org/article/8b19b11cb9cb44e082a37e95468b8fce
Autor:
J. D. Kirkham, K. A. Hogan, R. D. Larter, N. S. Arnold, F. O. Nitsche, N. R. Golledge, J. A. Dowdeswell
Publikováno v:
The Cryosphere, Vol 13, Pp 1959-1981 (2019)
Outburst floods from subglacial lakes beneath the Antarctic Ice Sheet modulate ice-flow velocities over periods of months to years. Although subglacial lake drainage events have been observed from satellite-altimetric data, little is known about thei
Externí odkaz:
https://doaj.org/article/c5ff8d7781374c8497b631773892440f
Autor:
R. D. Larter, K. A. Hogan, C.-D. Hillenbrand, J. A. Smith, C. L. Batchelor, M. Cartigny, A. J. Tate, J. D. Kirkham, Z. A. Roseby, G. Kuhn, A. G. C. Graham, J. A. Dowdeswell
Publikováno v:
The Cryosphere, Vol 13, Pp 1583-1596 (2019)
Basal hydrological systems play an important role in controlling the dynamic behaviour of ice streams. Data showing their morphology and relationship to geological substrates beneath modern ice streams are, however, sparse and difficult to collect. W
Externí odkaz:
https://doaj.org/article/10084b80a80949f88c4c230be2de7609
Autor:
J. J. Fürst, F. Gillet-Chaulet, T. J. Benham, J. A. Dowdeswell, M. Grabiec, F. Navarro, R. Pettersson, G. Moholdt, C. Nuth, B. Sass, K. Aas, X. Fettweis, C. Lang, T. Seehaus, M. Braun
Publikováno v:
The Cryosphere, Vol 11, Pp 2003-2032 (2017)
The basal topography is largely unknown beneath most glaciers and ice caps, and many attempts have been made to estimate a thickness field from other more accessible information at the surface. Here, we present a two-step reconstruction approach f
Externí odkaz:
https://doaj.org/article/6ee4e9d1c634478d9a9c326758ca71fd
Autor:
D. Farinotti, D. J. Brinkerhoff, G. K. C. Clarke, J. J. Fürst, H. Frey, P. Gantayat, F. Gillet-Chaulet, C. Girard, M. Huss, P. W. Leclercq, A. Linsbauer, H. Machguth, C. Martin, F. Maussion, M. Morlighem, C. Mosbeux, A. Pandit, A. Portmann, A. Rabatel, R. Ramsankaran, T. J. Reerink, O. Sanchez, P. A. Stentoft, S. Singh Kumari, W. J. J. van Pelt, B. Anderson, T. Benham, D. Binder, J. A. Dowdeswell, A. Fischer, K. Helfricht, S. Kutuzov, I. Lavrentiev, R. McNabb, G. H. Gudmundsson, H. Li, L. M. Andreassen
Publikováno v:
The Cryosphere, Vol 11, Iss 2, Pp 949-970 (2017)
Knowledge of the ice thickness distribution of glaciers and ice caps is an important prerequisite for many glaciological and hydrological investigations. A wealth of approaches has recently been presented for inferring ice thickness from characterist
Externí odkaz:
https://doaj.org/article/7b92c212db514fef88bb497f2d0997d7
Autor:
C. N. Williams, S. L. Cornford, T. M. Jordan, J. A. Dowdeswell, M. J. Siegert, C. D. Clark, D. A. Swift, A. Sole, I. Fenty, J. L. Bamber
Publikováno v:
The Cryosphere, Vol 11, Iss 1, Pp 363-380 (2017)
Bed topography is a critical boundary for the numerical modelling of ice sheets and ice–ocean interactions. A persistent issue with existing topography products for the bed of the Greenland Ice Sheet and surrounding sea floor is the poor representa
Externí odkaz:
https://doaj.org/article/971ef6a25ba54b13a861926949e3cae3
Publikováno v:
Geoscientific Model Development, Vol 9, Iss 5, Pp 1673-1682 (2016)
We describe a program that produces paleo-ice sheet reconstructions using an assumption of steady-state, perfectly plastic ice flow behaviour. It incorporates three input parameters: ice margin, basal shear stress and basal topography. Though it is u
Externí odkaz:
https://doaj.org/article/1e7b9ed8a5b842ab82647605d94b0179