Results 51 to 60 of about 6,560 (235)

Characterisation of a cold‐adapted, thermostable glucokinase from psychrophilic Pseudoalteromonas sp. AS‐131 reveals how the enzyme achieves high thermal stability without loss of cold adaptation

The FEBS Journal, EarlyView.
We investigated glucokinase from the psychrophilic Pseudoalteromonas sp. AS‐131 (PsGK), which was isolated from the Antarctic Ocean. Biochemical studies revealed that PsGK is a cold‐adapted enzyme with high thermal stability, in contrast to general cold‐adapted enzymes, which have low thermal stability.
Akane Yato, Yuki Kato, Fuyuko Hayashi, Rio Asaka, Atsuko Ogawa, Tokuro Oda, Sayaka Tsuji, Masashi Unno, Nobuaki Soh, Keiichi Watanabe, Masaki Horitani   +10 more
wiley   +1 more source

Dynamic influence of pinning points on marine ice-sheet stability: a numerical study in Dronning Maud Land, East Antarctica [PDF]

The Cryosphere, 2016
The East Antarctic ice sheet is likely more stable than its West Antarctic counterpart because its bed is largely lying above sea level. However, the ice sheet in Dronning Maud Land, East Antarctica, contains marine sectors that are in contact with the ...
L. Favier, F. Pattyn, S. Berger, R. Drews   +3 more
doaj   +1 more source

Unilateral Action on Climate Change and the Moral Obligation to Take Leadership

Journal of Social Philosophy, EarlyView.
ABSTRACT We claim that a moral obligation to take climate leadership by means of unilateral mitigation depends on the existence of a plausible follow‐the‐leader mechanism whereby unilateral mitigation by some increases the probability of sufficient mitigation by others to avert catastrophic climate impacts.
Daniel Steel, Rachel Cripps, C. Tyler DesRoches, Paul Bartha, Kian Mintz‐Woo   +4 more
wiley   +1 more source

Increased West Antarctic and unchanged East Antarctic ice discharge over the last 7 years [PDF]

The Cryosphere, 2018
Ice discharge from large ice sheets plays a direct role in determining rates of sea-level rise. We map present-day Antarctic-wide surface velocities using Landsat 7 and 8 imagery spanning 2013–2015 and compare to earlier estimates derived from ...
A. S. Gardner, G. Moholdt, T. Scambos, M. Fahnstock, S. Ligtenberg, M. van den Broeke, J. Nilsson   +6 more
doaj   +1 more source

Comparison of calibration methods of a PICO basal ice shelf melt module implemented in the GRISLI v2.0 ice sheet model [PDF]

Geoscientific Model Development
Uncertainties in future sea level rise are mainly due to uncertainties in Antarctic ice sheet projections. Indeed, modelling the future of the Antarctic ice sheet presents many challenges.
M. Menthon, P. Bakker, A. Quiquet, D. M. Roche, D. M. Roche, R. Reese   +5 more
doaj   +1 more source

Competing climate feedbacks of ice sheet freshwater discharge in a warming world

Nature Communications
Freshwater discharge from ice sheets induces surface atmospheric cooling and subsurface ocean warming, which are associated with negative and positive feedbacks respectively. However, uncertainties persist regarding these feedbacks’ relative strength and
Dawei Li, Robert M. DeConto, David Pollard, Yongyun Hu   +3 more
doaj   +1 more source

Impact of ice sheet meltwater fluxes on the climate evolution at the onset of the Last Interglacial [PDF]

Climate of the Past, 2016
Large climate perturbations occurred during the transition between the penultimate glacial period and the Last Interglacial (Termination II), when the ice sheets retreated from their glacial configuration.
H. Goelzer, P. Huybrechts, M.-F. Loutre, T. Fichefet   +3 more
doaj   +1 more source

Last Interglacial subsurface warming on the Antarctic shelf triggered by reduced deep-ocean convection

Communications Earth & Environment
The Antarctic ice-sheet could have contributed 3 to 5 m sea-level equivalent to the Last Interglacial sea-level highstand. Such an Antarctic ice-mass loss compared to pre-industrial requires a subsurface warming on the Antarctic shelf of ~ 3 °C according
Nicholas King-Hei Yeung, Laurie Menviel, Katrin J. Meissner, Dipayan Choudhury, Tilo Ziehn, Matthew A. Chamberlain   +5 more
doaj   +1 more source

West Antarctic ice sheet dynamics

Eos, Transactions American Geophysical Union, 1985
Mercer [1978] pointed out that a climatic warming, caused, for instance, by an increasing atmospheric CO2 concentration, may lead to a very rapid deglaciation (within a few hundred years) of the West Antarctic Ice Sheet, resulting in a sea level rise of about 5 m.
openaire   +1 more source

Antarctic Ice Sheet and Radar Altimetry: A Review [PDF]

Remote Sensing, 2009
Altimetry is probably one of the most powerful tools for ice sheet observation. Our vision of the Antarctic ice sheet has been deeply transformed since the launch of the ERS1 satellite in 1991. With the launch of ERS2 and Envisat, the series of altimetric observations now provides 19 years of continuous and homogeneous observations that allow ...
Rémy, F., Parouty, Soazig
openaire   +2 more sources