Zobrazeno 1 - 10
of 143
pro vyhledávání: '"Alun Hubbard"'
Publikováno v:
Quaternary Science Advances, Vol 12, Iss , Pp 100103- (2023)
During the Last Glacial Maximum (LGM), the Patagonian Ice Sheet (PIS) was the largest Quaternary ice mass in the Southern Hemisphere outside of Antarctica. Although the margins of the LGM ice sheet are now well established through end-moraine mapping
Externí odkaz:
https://doaj.org/article/878ea0ef37504a6d9e9fb0ab52295fb5
Autor:
Hans Petter Sejrup, Berit Oline Hjelstuen, Henry Patton, Mariana Esteves, Monica Winsborrow, Tine Lander Rasmussen, Karin Andreassen, Alun Hubbard
Publikováno v:
Communications Earth & Environment, Vol 3, Iss 1, Pp 1-10 (2022)
The last deglaciation of the marine parts of the Eurasian Ice Sheet was driven mainly by oceanic temperature change in the north and by changes in solar insolation in the south, based on a reconstruction of the marine parts of the Eurasian Ice Sheet
Externí odkaz:
https://doaj.org/article/aa393b2bc73f47e494875ae8c1613ed3
Publikováno v:
Earth and Space Science, Vol 9, Iss 3, Pp n/a-n/a (2022)
Abstract Whilst there has been a recent appreciation for the role of open‐system pingos in providing a fluid‐flow conduit through continuous permafrost that enables methane release, the formation and internal structure of these ubiquitous permafr
Externí odkaz:
https://doaj.org/article/8f45e9272e1c43ea9a4f7550e5deffd6
Autor:
Sasha Z. Leidman, Åsa K. Rennermalm, Anthony J. Broccoli, Dirk van As, Michiel R. van den Broeke, Konrad Steffen, Alun Hubbard
Publikováno v:
Frontiers in Earth Science, Vol 8 (2020)
Every year, numerous field teams travel to remote field locations on the Greenland ice sheet to carry out polar research, geologic exploration, and other commercial, military, strategic, and recreational activities. In this region, extreme weather ca
Externí odkaz:
https://doaj.org/article/dd614c5559ff4b2d8bcf122053dbb237
Autor:
Claire L. Cooper, Ivan P. Savov, Henry Patton, Alun Hubbard, Ruza F. Ivanovic, Jonathan L. Carrivick, Graeme T. Swindles
Publikováno v:
Quaternary Science Advances, Vol 1, Iss , Pp 100004- (2020)
The evidence for periods of increased volcanic activity following deglaciation, such as following ice sheet retreat after the Last Glacial Maximum, has been examined in several formerly glaciated areas, including Iceland, Alaska, and the Andean South
Externí odkaz:
https://doaj.org/article/c22254c594a2457886ea97d3e195eb0e
Publikováno v:
Journal of Maps, Vol 14, Iss 2, Pp 517-527 (2018)
We present a 1:42,000 scale map of Isunguata Sermia, a land-terminating outlet glacier draining the western-sector of the Greenland Ice Sheet. Structure-from-Motion software applied to ∼3,600 aerial images collected by a fixed-wing unmanned aerial
Externí odkaz:
https://doaj.org/article/31c53d18d97646f5b926519522bd3bd6
Autor:
TUN JAN YOUNG, DUSTIN M. SCHROEDER, POUL CHRISTOFFERSEN, LAI BUN LOK, KEITH W. NICHOLLS, PAUL V. BRENNAN, SAMUEL H. DOYLE, BRYN HUBBARD, ALUN HUBBARD
Publikováno v:
Journal of Glaciology, Vol 64, Pp 649-660 (2018)
The phase-sensitive radio-echo sounder (pRES) is a powerful new instrument that can measure the depth of internal layers and the glacier bed to millimetre accuracy. We use a stationary 16-antenna pRES array on Store Glacier in West Greenland to measu
Externí odkaz:
https://doaj.org/article/93a928ce73444272a16d0eecfdbaf8de
Autor:
Jonathan C. Ryan, Alun Hubbard, Marek Stibal, Tristram D. Irvine-Fynn, Joseph Cook, Laurence C. Smith, Karen Cameron, Jason Box
Publikováno v:
Nature Communications, Vol 9, Iss 1, Pp 1-10 (2018)
The surface types that comprise the dark zone of the Greenland Ice Sheet, an area of bare ice with low albedo, are unknown. Here, the authors use UAV imagery to show that, during the melt-season, biologically active surface impurities are responsible
Externí odkaz:
https://doaj.org/article/4bac3a9803014633825f805b8aba53e6
Autor:
Poul Christoffersen, Marion Bougamont, Alun Hubbard, Samuel H. Doyle, Shane Grigsby, Rickard Pettersson
Publikováno v:
Nature Communications, Vol 9, Iss 1, Pp 1-12 (2018)
Lakes on the Greenland Ice Sheet transfer water to the bed when they drain, but the impact is unknown. Here, the authors use a 3D model to show that lakes drain when fractures form, causing a chain reaction in which cascading lake drainages extend in
Externí odkaz:
https://doaj.org/article/35830d2af3204270ad2c78af1e029155
Autor:
Tristram D. L. Irvine-Fynn, Pete Bunting, Joseph M. Cook, Alun Hubbard, Nicholas E. Barrand, Edward Hanna, Andy J. Hardy, Andrew J. Hodson, Tom O. Holt, Matthias Huss, James B. McQuaid, Johan Nilsson, Kathrin Naegeli, Osian Roberts, Jonathan C. Ryan, Andrew J. Tedstone, Martyn Tranter, Christopher J. Williamson
Publikováno v:
Remote Sensing, Vol 14, Iss 1, p 62 (2021)
Ice surface albedo is a primary modulator of melt and runoff, yet our understanding of how reflectance varies over time across the Greenland Ice Sheet remains poor. This is due to a disconnect between point or transect scale albedo sampling and the c
Externí odkaz:
https://doaj.org/article/535634517e40450b809d9b90c0d20806