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All Outputs (135)

Subglacial lakes and hydrology across the Ellsworth Subglacial Highlands, West Antarctica (2020)
Journal Article
Napoleoni, F., Jamieson, S., Ross, N., Bentley, M., Rivera, A., Smith, A., Siegert, M., Paxman, G., Gacitua, G., Uribe, J., Zamora, R., Brisbourne, A., & Vaughan, D. (2020). Subglacial lakes and hydrology across the Ellsworth Subglacial Highlands, West Antarctica. The Cryosphere, 14, 4507-4524. https://doi.org/10.5194/tc-14-4507-2020

Subglacial water plays an important role in ice sheet dynamics and stability. Subglacial lakes are often located at the onset of ice streams and have been hypothesised to enhance ice flow downstream by lubricating the ice– bed interface. The most rec... Read More about Subglacial lakes and hydrology across the Ellsworth Subglacial Highlands, West Antarctica.

Long-term increase in Antarctic Ice Sheet vulnerability driven by bed topography evolution (2020)
Journal Article
Paxman, G., Gasson, E., Jamieson, S., Bentley, M., & Ferraccioli, F. (2020). Long-term increase in Antarctic Ice Sheet vulnerability driven by bed topography evolution. Geophysical Research Letters, 47(20), Article e2020GL090003. https://doi.org/10.1029/2020gl090003

Ice sheet behavior is strongly influenced by the bed topography. However, the effect of the progressive temporal evolution of Antarctica's subglacial landscape on the sensitivity of the Antarctic Ice Sheet (AIS) to climatic and oceanic change has yet... Read More about Long-term increase in Antarctic Ice Sheet vulnerability driven by bed topography evolution.

A low resource subglacial bedrock sampler: The percussive rapid access isotope drill (P-RAID) (2020)
Journal Article
Timoney, R., Worrall, K., Firstbrook, D., Harkness, P., Rix, J., Ashurst, D., Mulvaney, R., & Bentley, M. J. (2020). A low resource subglacial bedrock sampler: The percussive rapid access isotope drill (P-RAID). Cold Regions Science and Technology, 177, Article 103113. https://doi.org/10.1016/j.coldregions.2020.103113

The paleoclimate community has an interest in distributed subglacial bedrock sampling but, while capable drill systems do exist, they are often incompatible with Twin Otter logistics. To address this issue, a design built on the existing low footprin... Read More about A low resource subglacial bedrock sampler: The percussive rapid access isotope drill (P-RAID).

Major ice‐sheet change in the Weddell Sector of West Antarctica over the last 5000 years (2019)
Journal Article
Siegert, M. J., Kingslake, J., Ross, N., Whitehouse, P. L., Woodward, J., Jamieson, S. S., Bentley, M. J., Winter, K., Wearing, M., Hein, A. S., Jeofry, H., & Sugden, D. E. (2019). Major ice‐sheet change in the Weddell Sector of West Antarctica over the last 5000 years. Reviews of Geophysics, 57(4), 1197-1223. https://doi.org/10.1029/2019rg000651

Until recently, little was known about the Weddell Sea sector of the West Antarctic Ice Sheet. In the last 10 years, a variety of expeditions and numerical modelling experiments have improved knowledge of its glaciology, glacial geology, and tectonic... Read More about Major ice‐sheet change in the Weddell Sector of West Antarctica over the last 5000 years.

The Falkland Islands palaeoecological response to millennial scale climate perturbations during the Pleistocene-Holocene transition: implications for future vegetation stability in Southern Ocean islands (2019)
Journal Article
Scaife, R., Long, A., Monteath, A., Hughes, P., Bentley, M., & Stone, P. (2019). The Falkland Islands palaeoecological response to millennial scale climate perturbations during the Pleistocene-Holocene transition: implications for future vegetation stability in Southern Ocean islands. Journal of Quaternary Science, 34(8), 609-620. https://doi.org/10.1002/jqs.3150

Oceanic island flora is vulnerable to future climate warming, which is likely to promote changes in vegetation composition, and invasion of non‐native species. Sub‐Antarctic islands are predicted to experience rapid warming during the next century; t... Read More about The Falkland Islands palaeoecological response to millennial scale climate perturbations during the Pleistocene-Holocene transition: implications for future vegetation stability in Southern Ocean islands.

Reconstructions of Antarctic topography since the Eocene–Oligocene boundary (2019)
Journal Article
Paxman, G., Jamieson, S., Hochmuth, K., Gohl, K., Bentley, M., Leitchenkov, G., & Ferraccioli, F. (2019). Reconstructions of Antarctic topography since the Eocene–Oligocene boundary. Palaeogeography, Palaeoclimatology, Palaeoecology, 535, Article 109346. https://doi.org/10.1016/j.palaeo.2019.109346

Accurate models of past Antarctic ice sheet behaviour require realistic reconstructions of the evolution of bedrock topography. However, other than a preliminary attempt to reconstruct Antarctic topography at the Eocene–Oligocene boundary, the long-t... Read More about Reconstructions of Antarctic topography since the Eocene–Oligocene boundary.

Subglacial geology and geomorphology of the Pensacola-Pole Basin, East Antarctica (2019)
Journal Article
Paxman, G., Jamieson, S., Ferraccioli, F., Jordan, T., Bentley, M., Ross, N., Forsberg, R., Matsuoka, K., Steinhage, D., Eagles, G., & Casal, T. (2019). Subglacial geology and geomorphology of the Pensacola-Pole Basin, East Antarctica. Geochemistry, Geophysics, Geosystems, 20(6), 2786-2807. https://doi.org/10.1029/2018gc008126

The East Antarctic Ice Sheet (EAIS) is underlain by a series of low‐lying subglacial sedimentary basins. The extent, geology and basal topography of these sedimentary basins are important boundary conditions governing the dynamics of the overlying ic... Read More about Subglacial geology and geomorphology of the Pensacola-Pole Basin, East Antarctica.

Atmospheric forcing of rapid marine-terminating glacier retreat in the Canadian Arctic Archipelago (2019)
Journal Article
Cook, A., Copland, L., Noel, B., Stokes, C., Bentley, M., Sharp, M., …van den Broeke, M. (2019). Atmospheric forcing of rapid marine-terminating glacier retreat in the Canadian Arctic Archipelago. Science Advances, 5(3), Article eaau8507. https://doi.org/10.1126/sciadv.aau8507

The Canadian Arctic Archipelago contains >300 glaciers that terminate in the ocean, but little is known about changes in their frontal positions in response to recent changes in the ocean-climate system. Here, we examine changes in glacier frontal po... Read More about Atmospheric forcing of rapid marine-terminating glacier retreat in the Canadian Arctic Archipelago.

The role of lithospheric flexure in the landscape evolution of the Wilkes Subglacial Basin and Transantarctic Mountains, East Antarctica (2019)
Journal Article
Paxman, G., Jamieson, S., Ferraccioli, F., Bentley, M., Ross, N., Watts, A., …Young, D. (2019). The role of lithospheric flexure in the landscape evolution of the Wilkes Subglacial Basin and Transantarctic Mountains, East Antarctica. Journal of Geophysical Research: Earth Surface, 124(3), 812-829. https://doi.org/10.1029/2018jf004705

Reconstructions of the bedrock topography of Antarctica since the Eocene–Oligocene Boundary (ca. 34 Ma) provide important constraints for modelling Antarctic ice sheet evolution. This is particularly important in regions where the bedrock lies below... Read More about The role of lithospheric flexure in the landscape evolution of the Wilkes Subglacial Basin and Transantarctic Mountains, East Antarctica.

iceTEA: Tools for plotting and analysing cosmogenic-nuclide surface-exposure data from former ice margins (2019)
Journal Article
Jones, R., Small, D., Cahill, N., Bentley, M., & Whitehouse, P. (2019). iceTEA: Tools for plotting and analysing cosmogenic-nuclide surface-exposure data from former ice margins. Quaternary Geochronology, 51, 72-86. https://doi.org/10.1016/j.quageo.2019.01.001

Cosmogenic-nuclide surface-exposure data provide important constraints on the thickness, extent and behaviour of ice masses in the geological past. A number of online calculators provide the cosmogenic nuclide community with a means of easily calcula... Read More about iceTEA: Tools for plotting and analysing cosmogenic-nuclide surface-exposure data from former ice margins.

Antarctic ice sheet palaeo-thinning rates from vertical transects of cosmogenic exposure ages (2019)
Journal Article
Small, D., Pittard, M., Whitehouse, P., Jones, R., & Bentley, M. (2019). Antarctic ice sheet palaeo-thinning rates from vertical transects of cosmogenic exposure ages. Quaternary Science Reviews, 206, 65-80. https://doi.org/10.1016/j.quascirev.2018.12.024

We present a nontrivial correlation between the enhancement of the Higgs-fermion couplings and the Higgs pair production cross section in two Higgs doublet models with a flavor symmetry, with implications for LHC searches. This symmetry suppresses fl... Read More about Antarctic ice sheet palaeo-thinning rates from vertical transects of cosmogenic exposure ages.

Evaluation of Mumiyo Deposits from East Antarctica as Archives for the Late Quaternary Environmental and Climatic History (2018)
Journal Article
Berg, S., Melles, M., Hermichen, W., McClymont, E., Bentley, M., Hodgson, D., & Kuhn, G. (2019). Evaluation of Mumiyo Deposits from East Antarctica as Archives for the Late Quaternary Environmental and Climatic History. Geochemistry, Geophysics, Geosystems, 20(1), 260-276. https://doi.org/10.1029/2018gc008054

Mumiyo deposits form in the vicinity of snow petrel (Pagodroma nivea) nesting sites and consist of fossil stomach oil (mumiyo), guano and minerogenic material. Here, we evaluate mumiyo deposits from the inland mountain ranges of central Dronning Maud... Read More about Evaluation of Mumiyo Deposits from East Antarctica as Archives for the Late Quaternary Environmental and Climatic History.

Evidence for the long-term sedimentary environment in an Antarctic subglacial lake (2018)
Journal Article
Smith, A. M., Woodward, J., Ross, N., Bentley, M. J., Hodgson, D. A., Siegert, M. J., & King, E. C. (2018). Evidence for the long-term sedimentary environment in an Antarctic subglacial lake. Earth and Planetary Science Letters, 504, 139-151. https://doi.org/10.1016/j.epsl.2018.10.011

Lakes beneath the Antarctic Ice Sheet are of fundamental scientific interest for their ability to contain unique records of ice sheet history and microbial life in their sediments. However, no records of subglacial lake sedimentation have yet been ac... Read More about Evidence for the long-term sedimentary environment in an Antarctic subglacial lake.

Late Holocene relative sea levels near Palmer Station, northern Antarctic Peninsula, strongly controlled by late Holocene ice-mass changes (2018)
Journal Article
Simms, A., Whitehouse, P., Simkins, L., Nield, G., DeWitt, R., & Bentley, M. (2018). Late Holocene relative sea levels near Palmer Station, northern Antarctic Peninsula, strongly controlled by late Holocene ice-mass changes. Quaternary Science Reviews, 199, 49-59. https://doi.org/10.1016/j.quascirev.2018.09.017

Many studies of Holocene relative sea-level (RSL) changes across Antarctica assume that their reconstructions record uplift from glacial isostatic adjustment caused by the demise of the Last Glacial Maximum (LGM) ice sheets. However, recent analysis... Read More about Late Holocene relative sea levels near Palmer Station, northern Antarctic Peninsula, strongly controlled by late Holocene ice-mass changes.

Lack of evidence for a substantial sea-level fluctuation within the Last Interglacial (2018)
Journal Article
Barlow, N., McClymont, E., Whitehouse, P., Stokes, C., Jamieson, S., Woodroffe, S., …Sanchez-Montes, M. (2018). Lack of evidence for a substantial sea-level fluctuation within the Last Interglacial. Nature Geoscience, 11, 627-634. https://doi.org/10.1038/s41561-018-0195-4

During the Last Interglacial, global mean sea level reached approximately 6 to 9 m above the present level. This period of high sea level may have been punctuated by a fall of more than 4 m, but a cause for such a widespread sea-level fall has been e... Read More about Lack of evidence for a substantial sea-level fluctuation within the Last Interglacial.

Bedrock erosion surfaces record former East Antarctic Ice Sheet extent (2018)
Journal Article
Paxman, G., Jamieson, S., Ferraccioli, F., Bentley, M., Ross, N., Armadillo, E., …DeConto, R. (2018). Bedrock erosion surfaces record former East Antarctic Ice Sheet extent. Geophysical Research Letters, 45(9), 4114-4123. https://doi.org/10.1029/2018gl077268

East Antarctica hosts large subglacial basins into which the East Antarctic Ice Sheet (EAIS) likely retreated during past warmer climates. However, the extent of retreat remains poorly constrained, making quantifying past and predicted future contrib... Read More about Bedrock erosion surfaces record former East Antarctic Ice Sheet extent.

Ice sheet retreat and glacio-isostatic adjustment in Lützow-Holm Bay, East Antarctica (2017)
Journal Article
Verleyen, E., Tavernier, I., Hodgson, D. A., Whitehouse, P. L., Kudoh, S., Imura, S., …Vyverman, W. (2017). Ice sheet retreat and glacio-isostatic adjustment in Lützow-Holm Bay, East Antarctica. Quaternary Science Reviews, 169, 85-98. https://doi.org/10.1016/j.quascirev.2017.06.003

The East Antarctic Ice Sheet has relatively few field data to constrain its past volume and contribution to global sea-level change since the Last Glacial Maximum. We provide new data on deglaciation history and develop new relative sea-level (RSL) c... Read More about Ice sheet retreat and glacio-isostatic adjustment in Lützow-Holm Bay, East Antarctica.