Zobrazeno 1 - 10
of 25
pro vyhledávání: '"Samuel S. Pegler"'
Publikováno v:
Journal of Glaciology, Vol 68, Pp 1177-1184 (2022)
Increasing ice flux from glaciers retreating over deepening (retrograde) bed topography has been implicated in the recent acceleration of mass loss from the Greenland and Antarctic ice sheets. We show in observations that some glaciers have remained
Externí odkaz:
https://doaj.org/article/9eef1526afdc4bceb7bb9b63a0e620ba
Publikováno v:
Communications Earth & Environment, Vol 3, Iss 1, Pp 1-7 (2022)
The rate of deformation in Antarctic ice shelves is proportional to stress to the power of 4, not 3 as often used in models, according to a calibration of Glen’s Flow Law with satellite remote sensing data from Antarctic ice shelves.
Externí odkaz:
https://doaj.org/article/5a004c81dea846f0a2a14a2253db1bb0
Autor:
Samuel S. Pegler, David J. Ferguson
Publikováno v:
Nature Communications, Vol 12, Iss 1, Pp 1-12 (2021)
A novel model for submarine tephra dispersal by hydrothermal megaplumes is proposed. The energy flux inferred from our model aligns with megaplume observations, and suggests that the catastrophic release of hot crustal fluids, as opposed to lava heat
Externí odkaz:
https://doaj.org/article/dbf0468cee8a41d4a6a444c09e58f897
Ice fabrics – the distribution of crystal orientations in a polycrystal – are key for understanding and predicting ice flow dynamics. Despite their importance, the characteristics and evolution of fabrics produced outside of the deformation regim
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9253c4197eaa8ec014782888e7e30b3a
https://tc.copernicus.org/articles/16/4571/2022/
https://tc.copernicus.org/articles/16/4571/2022/
Autor:
Herbert E. Huppert, Samuel S. Pegler
Publikováno v:
Journal of Fluid Mechanics. 932
We evaluate theoretically and confirm experimentally the shape of the fluid envelope resulting from the input of relatively heavy fluid at a constant rate from a point source at the base of a homogeneous porous medium. In three dimensions an initiall
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::49b6a78f78a47b67e2fd46156c0c3a01
https://doi.org/10.1017/jfm.2021.963
https://doi.org/10.1017/jfm.2021.963
Publikováno v:
Journal of Fluid Mechanics. 917
We present a theoretical and experimental study of the dynamics of two-layer viscous fluid flows on inclined surfaces, motivated by natural and industrial phenomena involving the interactions between two fluid layers. A general model describing the e
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0645579367f3b3a0541a8f15a2d49f0d
https://doi.org/10.1017/jfm.2021.273
https://doi.org/10.1017/jfm.2021.273
Ice fabrics are key for understanding and predicting ice flow dynamics. Despite its importance, the characteristics and evolution of ice fabrics beyond pure and simple shear flow has largely been neglected. However, 80 % of the flow of ice in Antarct
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bc306d57e6af172ab7313303ce133c11
https://doi.org/10.5194/tc-2021-118
https://doi.org/10.5194/tc-2021-118
Publikováno v:
Journal of Fluid Mechanics. 915
What is the shape formed by a body that is melting or dissolving into an ambient fluid? We present a theoretical analysis of the dynamics of melting or dissolving bodies in the common situation where the transfer of heat or solute at the surface crea
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6253c3a1c5b77cd4bd16b602c757f17d
https://doi.org/10.1017/jfm.2021.86
https://doi.org/10.1017/jfm.2021.86
There remains a significant challenge to model ice crystal fabrics both accurately and efficiently within ice-sheet models. We develop the first fully constrained continuum model, validated against experiments, able to predict the evolution of a crys
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3adc97b28fd60a17fb1d137a9d63161f
https://eprints.whiterose.ac.uk/168885/1/EPSLFinalToPublish.pdf
https://eprints.whiterose.ac.uk/168885/1/EPSLFinalToPublish.pdf
Publikováno v:
Journal of Fluid Mechanics. 900
How quickly does an ice cube melt or a lump of sugar dissolve? We address the open problem of the shapes of solids left to melt or dissolve in an ambient fluid driven by stable natural convection. The theory forms a convective form of a Stefan proble
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a260c929225a24d91ae970f3de4b8f6f
https://doi.org/10.1017/jfm.2020.507
https://doi.org/10.1017/jfm.2020.507