Relationship between the decrease of sea ice and early summer atmospheric circulation in and around the Sea of Okhotsk
Anticyclone ; Atmospheric circulation ; Ocean atmosphere interaction ; Pacific Region ; Sea ice ; Time series ; Years 1970-79 ; Years 1980-89 ; Years 1990-99
The aim of this study is to clarify the relationships between the variability in sea ice area in the Sea of Okhotsk during the sea ice disappearance period, and the variability in the atmospheric circulation around the sea of Okhotsk during
the early summer, focused on the effects of the sea ice on the atmosphere. A strengthening of the Okhotsk anticyclone is presumed to be related to variability in the decrease in sea ice in the Sea of Okhotsk.
Geomorphic and sedimentary evidence for patterns of late Midlandian ice retreat in the Tempo Valley, north-central Ireland
Patterns of late Midlandian ice retreat in the Tempo Valley are reconstructed from field morphological and sedimentary evidence. Ice retreat stages reflect the splitting up of the regional Omagh Basin ice mass into separate Omagh Basin and Clogher
Valley components, and the formation and later drainage of glacial lakes which are controlled by the mutual interactions of these ice masses. The Tempo Valley area illustrates some generic problems in reconstructing ice retreat stages in Ireland
, including the historical over-emphasis of the presence of end-moraines, the possibility of ice lobe interactions following ice sheet division, and the likelihood of ice stagnation as a major mode of deglaciation.
Massive ground ice body of glacial origin at Yugorski Peninsula, Arctic Russia
Arctic Region ; Ground ice ; Ice ; Oxygen 18 ; Palaeogeography ; Permafrost ; Quaternary ; Russia ; Stratigraphy
A massive ground ice body at Cape Shpindler on Yugorski Peninsula, southern Kara Sea coast, Russia, was studied with regard to large-scale internal structures, its stratigraphic context and contacts to surrounding sediments, in order to highlight
its origin. The results mean that the buried ice body has survived 2 interglacial periods (Eemian and Holocene), as well as several interstadials. This has consequences for the perception of the potential of relict permafrost to preserve long
Ice-wedge casts as indicators of paleotemperatures : precise proxy or wishful thinking ?
Comparative study ; Europe ; Ice wedge ; Palaeo-environment ; Palaeotemperature ; Periglacial features ; Permafrost ; Pleistocene ; Present time ; Quaternary
The main aim of this paper is to stimulate a more critical use of Weichselian ice-wedge casts for paleoclimatic and environmental reconstructions. First, the rationale for estimating palaeotemperatures from ice-wedge casts and its application
Canada ; Climatic data ; Climatic variability ; Forecast ; Freezing ; Ice ; Lake ; Model ; Quebec ; Simulation
During 5 winters, the evolution of spatial patterns in the snow and ice cover of a lake are observed and simulated. The ice-on and ice-off dates are sensitive to climatic variations but not the mean depth of ice : model and observations reveal more
Geomorphic evidence for patterns of late Midlandian ice advance and retreat in the Omagh Basin
The A. describes and interprets patterns of late Midlandian glacial bedforms in the Omagh Basin, north central Ireland, and reconstructs the position of ice centres and margins during ice buildup and decay. He makes inferences on the internal
characteristics of the ice sheet such as its hydraulic and thermal regimes.
Traversée du cercle del'Antarctique par le paquebot de croisière MS Amsterdam en 2003-2004. Carte générale de la péninsule de l'Antarctique et route de l'Amsterdam. Conditions glaciaires.
Ground ice and soluble cations in near-surface permafrost, Inuvik, Northwest Territories, Canada
Active layer ; Canada ; Geochemistry ; Grain size distribution ; Ground ice ; Northwest Territories ; Organic materials ; Periglacial features ; Permafrost ; Soil moisture
The distribution of segregated ice and soluble ions in near-surface permafrost were investigated in hummocky terrain near Inuvik. The purposes of this paper are : to present the profiles of ice content in near-surface permafrost from the site
Reconstruction of ice complex remnants on the Eastern Siberian Arctic shelf
Based on the analysis of seafloor topography together with historical, geological and palaeogeographical data obtained from published and archived sources, this paper is an attempt to reconstruct the history of Ice Complex (IC) islands within
the Laptev and East Siberian Sea shelves. Also, an attempt to estimate the rate of seafloor thermal abrasion was made and a schematic map of former IC islands within the Laptev Sea and western part of the East Siberian Sea shelves has been compiled.
Quaternary science is experiencing something of a revolution. Motivated by the emerging climate records from the ice sheets and the world's ocean, the geographical community is eagerly pursuing a global research agenda. This review begins
by examining recent efforts (post-2000 publications) to correlate vertical changes in sea level with climate and ice sheet volume, before considering research focused on coastal evolution and shelf sedimentation.
The Marmolada Glacier : an investigation of natural weathering and anthropic pressure through chemical analyses of melting water and ice
A sampling compaign on Marmolada Glacier (Dolomites, Italy) was undertaken on 7-8 september 2001, in order to collect samples of ice, snow and surface waters for chemical analyses. Such analyses, conducted on the field and in the analytical
River channel changes in the Rhone Delta (France) since the end of the Little Ice Age : geomorphological adjustment to hydroclimatic change and natural resource management
Channel geometry ; Delta ; Fitting ; Flood ; France ; Holocene ; Human impact ; Little ice age ; Palaeohydrology ; Rhône ; River bed ; Sea level ; Sediment budget ; South-Eastern France
Geomorphological adjustment in the Rhone catchment since the final stage of the Little Ice Age has been induced by hydroclimatic change and human disturbances. These adjustments are examined to highlight the response of 2 sand-bed distributary
The depression formations in Eastern Pomerania were used to exemplify the different types of evolution of lake basins in connection with the melting of masses of dead ice. It was shown that, besides lakes in which the onset of lake sedimentation
was associated with the Pre-Alleröd complex, there are also depressions in which the process began as recently as in the Pre-Boreal. It is therefore hypothesized that the final melting of masses of dead ice may only have occured at that stage. If this were
the case, then the main cause of the implied temporal differentiation to rates of melting of dead ice in depressions would be their relationship with the developing local drainage network. - (BJ)