Results 111 to 120 of about 91,538 (269)

A mechanism for biologically-induced iodine emissions from sea-ice

, 2008
International audienceOnly recently, ground- and satellite-based measurements have reported high concentrations of IO in coastal Antarctica. The sources of such a large iodine burden in the Antarctic atmosphere remain unknown.
Boxe, C. S., Saiz-Lopez, A.
core   +1 more source

Flow‐pattern evolution of the Scandinavian Ice Sheet indicated by the subglacial lineation record over Norway, Sweden and Finland

Boreas, EarlyView.
We present a 25‐stage reconstruction of the ice‐flow pattern evolution of the Scandinavian Ice Sheet based on mapping and analysis of ~240 000 subglacial lineations and lineation fields across Norway, Sweden, Finland, and parts of NW Russia. Our reconstruction uses a glacial geomorphological inversion approach, in which we generated 611 individual ...
Frances E. G. Butcher, Anna L. C. Hughes, Helen E. Dulfer, Christopher D. Clark, Jeremy C. Ely, Emma L. M. Lewington, Benjamin M. Boyes, Alex C. Scoffield, Stephen Howcutt, Christiaan R. Diemont   +9 more
wiley   +1 more source

Thorncliffe Formation: A proglacial to subglacial lacustrine basin sequence, Greater Toronto Region, Canada

Boreas, EarlyView.
Map of Lower sediment (LS) thickness is a surrogate for the distribution of Thorncliffe Formation (TF) and ~75% of TF thickness from the slope of Niagara Escarpment east to Brighton. Inset images show the LS sequence at the Don Valleys brickyards (DVBY) and undeformed TF sand and gravel (~15 m) below Newmarket Till (NT) at sites L and Co.
David R. Sharpe, Charles E. Logan, Ross D. Knight, Andre J.‐M. Pugin   +3 more
wiley   +1 more source

Expansion of invasive carabids across elevation and habitats on sub‐Antarctic South Georgia

Insect Conservation and Diversity, EarlyView.
Two introduced carabid species have continued to expand their ranges on the sub‐Antarctic island of South Georgia over the past 10–15 years. The species have colonised inland valleys and are present across habitats but are more abundant in those with high vegetation cover. N‐mixture models revealed the optimal sampling method, intensity and habitat for
Pierre Tichit, Peter Convey, Paul Brickle, Rosemary J. Newton, Tamara Contador, Wayne Dawson   +5 more
wiley   +1 more source

Improving Our Understanding of Antarctic Sea Ice with NASA's Operation IceBridge and the Upcoming ICESat-2 Mission [PDF]

Antarctic sea ice is a crucial component of the global climate system. Rapid sea ice production regimes around Antarctica feed the lower branch of the Southern Ocean overturning circulation through intense brine rejection and the formation of Antarctic ...
Kurtz, Nathan T., Markus, Thorsten, Petty, Alek A.   +2 more
core   +1 more source

Unprecedented springtime retreat of Antarctic sea ice in 2016 [PDF]

, 2017
During austral spring 2016 Antarctic sea ice extent (SIE) decreased at a record rate of 75 x 10(3) km(2) d(-1), which was 46% faster than the mean rate and 18% faster than in any previous spring season during the satellite era.
Bintanja, Bracegirdle, Bracegirdle, Cavalieri, Dee, Ferreira, Fetterer, Gareth J. Marshall, Hall, Hawkins, Hobbs, Holland, Hosking, J. Scott Hosking, James O. Pope, John Turner, Liu, Marshall, Marshall, Parkinson, Parkinson, Pranab Deb, Reid, Serreze, Simmonds, Thomas J. Bracegirdle, Tony Phillips, Turner, Turner, Turner, Turner, Turner, Zachos, Zhang, Zhang, Zwally   +35 more
core   +2 more sources

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

Sea-level response to ice sheet evolution: An ocean perspective [PDF]

The ocean's influence upon and response to Antarctic ice sheet changes is considered in relation to sea level rise over recent and future decades. Assuming present day ice fronts are in approximate equilibrium, a preliminary budget for the ice sheet is ...
Jacobs, Stanley S.
core   +1 more source

Modeling Ice Shelf/Ocean Interaction in Antarctica: A Review [PDF]

, 2016
The most rapid loss of ice from the Antarctic Ice Sheet is observed where ice streams flow into the ocean and begin to float, forming the great Antarctic ice shelves that surround much of the continent.
Adrian Jenkins, Benjamin Galton-Fenzi, Michael Dinniman, null null, Paul Holland, Ralph Timmermann, Xylar Asay-Davis   +6 more
core   +5 more sources

Novel Hydrurus species (Chrysophyceae) and their adaptations to high‐altitude European and Arctic snowfields

Journal of Phycology, EarlyView.
Abstract Colored snow caused by green algae (Chlorophyceae) is well known, but melting snowpacks can also harbor golden‐brown blooms consisting of Chrysophyceae. We collected 14 samples of cryoflora in the Austrian and Swiss Alps, the High Tatras in Slovakia, and in Arctic Svalbard. Eight laboratory unicellular flagellated strains were established from
Lenka Procházková, Robert A. Andersen, Thomas Leya, Tomáš Řezanka, Martin Lukeš, Linda Nedbalová, Daniel Remias   +6 more
wiley   +1 more source