Modeling the growth and decay of the Antarctic Peninsula Ice Sheet
The model is driven by sea-level change over the last 40,000 yr in association with assumed changes in the rate of melting beneath ice shelves. Ice growth and decay are characterized by thresholds which separate periods of steady state from periods
of rapid transition. Tests show that ice sheet behavior is most sensitive to sea-level change, basal marine melting and accumulation and is less sensitive to isostasy, spatial variation in accumulation, calving rates, and ice flow parameterization.
Arctic Ocean ice and climate: perspectives on a century of polar research
Large-scale ice-climate interactions are discussed for seasonal and longer time scales and potential human-induced impacts on the Arctic ice regime are noted. Although ice anomalies are pronounced on a regional scale, in response to atmospheric
circulation patterns, there are also strong correlations between high-latitude temperature trends and total ice area over at least the past 30 years.
Late Wisconsinan age glacial Landforms and deposits indicate that an ice shelf of at least 60,000 km flowed northwestward into Viscount Melville Sound, probably from the M'Clintock Dome of the Laurentide Ice Sheet. The ice shelf overlapped coastal
areas and laid Winter Harbour Till up to 150 m above present sea level on the north coast of Victoria Island. The contemporary sea-level was 50 to 100 m higher than present. A maximum age of 10,340150 yr BP for the till, and thus for the ice shelf
advance, is provided by shells in marine sediments which underlie it, whereas a minimum age of 9880150 yr BP is provided by overlying shells that postdate the ice advance.
Ross ice shelf oxygen isotopes and West Antarctic climate history
Antarctique ; Barrière de Ross ; Carotte de glace ; Glace ; Géographie des régions polaires ; Isotopes de l'oxygène ; Paléoclimatologie ; Quaternaire supérieur ; Ross Ice Shelf
The Ross Ice Shelf oxygen isotopic profile at station J-9 covers at least the last 30,000 yr.
World Data Center-A for Glaciology (Snow and Ice). An overview of activities and services World Data Center-A for Glaciology, Snow and Ice, une vue d'ensemble des activités et des services
Le World Data Center-A for Glaciology, Snow and Ice est l'un des trois centres de données du monde en glaciologie. Associé au National Snow and Ice Data Center, il archive les données publiées ou non, sur la neige et la glace. - (L'A.).
La teneur en oxygène 18 montre qu'une couche de glace blanche en bordure de la Barnes Ice Cap date du Pléistocène. A partir d'un modèle d'écoulement glaciaire, on estime l'épaisseur de la couche au centre de la calotte: environ 8m. Une autre
The AA. describe here late Quaternary paleoclimate, ice-volume change, and dynamics of the Ross ice drainage system using data from a powerful combination of drift sheets and ice cores.
The morphology, sediments and processes associated with the construction of a moraine along the western margin of the ice-shelf in George VI Sound, Antarctica, are discussed. A conceptual model of the moraine is developed and may help to explain
Bearing strength of fast ice and Antarctic transport operations during the spring-summer period
Article traduit du russe, extrait de: Trudy sovetskoj antarkticeskoj ekspedicii, Leningrad, 1977, vol.63 (The fast ice of East Antarctica), pp. 104-118.
Hernieuwde belangstelling voor onderzoek van stuwwallen. Eerste resultaten van de Glacitecs -84 expeditie naar Spitsbergen (Renewed interest in research of ice-pushed ridges. First results of the Glacitecs -84 expedition to Spitsbergen)
The results of the study of the present-day situation at the ice-pushed ridge of the Holmstrombreen and of the glaciotectonic phenomena at the Coraholmen Island may be useful in the explanation of the morphology of the Dutch (Saalian) ice-pushed
Estimation de l'état d'équilibre de trois bandes d'écoulement du Ross Ice Shelf. A partir d'estimations, il semble que le glacier s'épaissit au rythme de 3415 cm par an. Les plus grands courants d'écoulement sont vers le Sud et l'Est de Roosevelt
Recent year-to-year variations in seasonal temperatures and sea ice conditions in the eastern Canadian Arctic
, and these departures are found to be synchronous over the region. Several indices of sea ice severity also show significant year-to-year variations, but these are not spatially coherent. Relationships between climatic parameters and sea ice are examined in order