Results 51 to 60 of about 1,100,902 (296)

Emergence of the Shackleton Range from beneath the Antarctic Ice Sheet due to glacial erosion [PDF]

, 2014
This paper explores the long-term evolution of a subglacial fjord landscape in the Shackleton Range, Antarctica. We propose that prolonged ice-sheet erosion across a passive continental margin caused troughs to deepen and lower the surrounding ice-sheet ...
Kerr, A. R., Hein, AS, Sugden, David, Stuart, F. M., Hein, A. S.; id_orcid, Sugden, DE, Fogwill, C. J., Kubik, PW, Kubik, P. W., Stuart, FM, Fogwill, CJ ; https://orcid.org/, Kerr, AR   +11 more
core   +1 more source

Modelling the Early Weichselian Eurasian Ice Sheets: role of ice shelves and influence of ice-dammed lakes [PDF]

Climate of the Past, 2007
During the last glaciation, a marine ice sheet repeatedly appeared in Eurasia. The floating part of this ice sheet was essential to its rapid extension over the seas.
V. Peyaud, C. Ritz, G. Krinner
doaj  

The impact of spatially varying ice sheet basal conditions on sliding at glacial time scales

Journal of Glaciology, 2023
Spatially variable basal conditions are thought to govern how ice sheets behave at glacial time scales (>1000 years) and responsible for changes in dynamics between the core and peripheral regions of the Laurentide and Fennoscandian ice sheets.
Evan J. Gowan, Sebastian Hinck, Lu Niu, Caroline Clason, Gerrit Lohmann   +4 more
doaj   +1 more source

A stratigraphic link across 1100 km of the Antarctic Ice Sheet between the Vostok ice-core site and Titan Dome (near South Pole) [PDF]

, 2000
Isochronous internal ice-sheet layering, measured from airborne 60 MHz radar, was traced between Lake Vostok and the Titan Ice Dome (100 km from South Pole Station), Antarctica. Three layers were selected between Ridge B and Titan Dome, and between Ridge
Siegert, MJ, Hodgkins, R, Siegert, M. J., Hodgkins, R.   +3 more
core   +1 more source

Conserved binding mode but diverse interfaces of MreC‐PBP2 interactions

FEBS Letters, EarlyView.
The crystal structure of abMreC reveals a conserved two β‐barrel architecture and provides structural insights into its role within the bacterial elongasome. The abMreC–abPBP2 complex model identifies the molecular basis of MreC‐mediated PBP2 recognition, contributing to the regulation of peptidoglycan synthesis.
Hyunseok Jang, Hyo Been Jin, Chang Min Kim, So Yeon Lee, Hyun Ho Park   +4 more
wiley   +1 more source

Evidence of meltwater retention within the Greenland ice sheet [PDF]

The Cryosphere, 2013
Greenland ice sheet mass losses have increased in recent decades with more than half of these attributed to surface meltwater runoff. However, the magnitudes of englacial storage, firn retention, internal refreezing and other hydrologic processes that ...
A. K. Rennermalm, L. C. Smith, V. W. Chu, J. E. Box, R. R. Forster, M. R. Van den Broeke, D. Van As, S. E. Moustafa   +7 more
doaj   +1 more source

The microbiome of glaciers and ice sheets [PDF]

npj Biofilms and Microbiomes, 2017
AbstractGlaciers and ice sheets, like other biomes, occupy a significant area of the planet and harbour biological communities with distinct interactions and feedbacks with their physical and chemical environment. In the case of the glacial biome, the biological processes are dominated almost exclusively by microbial communities.
Alexandre M. Anesio, Stefanie Lutz, Nathan A. M. Chrismas, Liane G. Benning   +3 more
openaire   +7 more sources

Trimlines, blockfields and the vertical extent of the last ice sheet in southern Ireland [PDF]

, 2015
The research reported here was supported by UK NERC grant NER/B/S/2001/0919Trimlines separating glacially abraded lower slopes from blockfield-covered summits on Irish mountains have traditionally been interpreted as representing the upper limit of the ...
Stone, John O., John O. Stone, Ballantyne, Colin, Colin K. Ballantyne   +3 more
core   +1 more source

Molecular characterization of covRS mutations in M1UK Streptococcus pyogenes

FEBS Open Bio, EarlyView.
Group A Streptococcus (GAS) acquires covRS mutations driving a hypervirulent bacterial state, frequently associated with invasive disease‐like necrotizing fasciitis. We demonstrate that the newly emerged M1UK GAS lineage can also acquire these mutations.
Jarrad Pritchard, Emma‐Jayne Proctor, Jiawa Wang, Nikolas P. Johnston, Andrew Hayes, Georgia McCorkell, Haibo Yu, Jai Tree, Mark R. Davies, Mark J. Walker, Ronald Sluyter, Stephan Brouwer, Martina L. Sanderson‐Smith   +12 more
wiley   +1 more source

Radar isochrones as constraints on paleo–ice-sheet model simulations in two off-divide regions of East Antarctica [PDF]

The Cryosphere
Radio-echo sounding of polar ice masses has revealed extensive isochrones that have primarily been used to constrain paleo-accumulation rates, geothermal heat flux, and changes in ice-sheet dynamics in stable regions of the ice sheet. However, isochrones
J. A. Bodart, J. A. Bodart, V. Višnjević, V. Višnjević, S. Franke, V. Helm, O. Eisen, O. Eisen, A. Hermant, A. Hermant, A. M. Zuhr, D. Steinhage, J. C. R. Sutter, J. C. R. Sutter   +13 more
doaj   +1 more source