Late Weichselian glaciation of the Russian HighArctic
Arctic Region ; Glaciation ; Ice sheet ; Model ; Palaeo-environment ; Palaeoclimate ; Quaternary ; Russia ; Sea level
A numerical model of the Eurasian HighArctic ice sheet is used to make predictions about the glaciation of the Kara Sea and Severnaya Zemlya. An inverse approach to modeling is adopted, where ice-sheet margins are forced to match those derived from
the eastern Eurasian HighArctic, and plausible scenarios for the paleoclimate in this region.
Hydrology of a drainage basin in the Canadian HighArctic
Arctique ; Bassin-versant ; Bilan hydrologique ; Canada ; Cornwallis Island ; Ecoulement ; Fonte des neiges ; Géographie des régions polaires ; HighArctic ; Hydrologie ; Mc Master basin ; Neige ; Nivologie ; Permafrost ; Zone froide
Hydrologic research in the permafrost region has focused mainly upon individual processes. This study integrates the various processes acting on a HighArctic drainage basin, emphasizing the roles played by the energy balance, the uneven snow cover
, and permafrost at shallow depths. Over three-quarters of annual discharge is released during the melt period, but occasional high-flow events are also produced by summer rainstorms. About 80 percent of annual precipitation occurs as snowfall, and about 70 percent
Effects of high-magnitude/low-frequency fluvial events generated by intense snowmelt or heavy rainfall in arctic periglacial environments in northern Swedish Lapland and northern Siberia
Arctic Region ; Asian part of Russia ; Cold area ; Comparative study ; Heavy rain ; Lapland ; Meltwater ; Periglacial features ; Pic discharge ; Sediment budget ; Sediment transport ; Siberia ; Sweden ; Watershed
. The results from these both arctic periglacial environments underline the high importance of high-magnitude/low-frequency fluvial events for the total fluvial sediment budgets of periglacial fluvial sediments. Restricted sediment avaibility is in both arctic
The characteristics of these events in the arctic-oceanic Latnjavagge drainage basin in northern Swedish Lapland are analysed and compared with snowmelt and rainfall-induced runoff peaks in the Krasnaya river system in arctic northern Siberia
Distribution of glaciofluvial sediment within and on the surface of a higharctic valley glacier : Marthabreen, Svalbard
Arctic Region ; Cold area ; Fluvioglacial features ; Glacial flow ; Glacier ; Glaciology ; Polar region ; Spatial distribution ; Svalbard ; Tectonic thrust
The aim of this paper is to describe the mechanisms of entrainment, transport and release of glaciofluvial sediment at the higharctic valley glacier Marthabreen (Svalbard), and to outline the ice-deformational processes that determine
Controls on suspended-sediment transfer at a High-Arctic glacier, determined from statistical modelling
Arctic Region ; Glacier ; Meltwater ; Model ; Multivariate analysis ; Polar region ; Regression analysis ; Suspended load ; Time series
This paper's aims have been : first, to identify what forms of regression model most successfully account for variance in an suspended-sediment concentration (SSC) time series from the proglacial stream of a HighArctic glacier, and second, to infer
Observations on rock moisture variability in gneiss and basalt under natural, arctic conditions
Arctic Ocean;Arctic Region ; Cold area ; Freezing ; Greenland ; Moisture ; Rock ; Statistics ; Weathering
Presents some results from a monitoring experiment as to the natural moisture variability in rocks exposed to high latitude weather conditions over several months, in central West Greenland.
High latitude environments and environmental change
Arctic Ocean;Arctic Region ; Bibliography ; Ecosystem ; Environment ; Global change ; Greenhouse effect ; Human impact ; Permafrost ; Pollution
This article aims to review critically various kinds of phenomenal records from the late 1980s, which are pertinent in the environmental change context. The account is restricted to the northern boreal zone and the Arctic.
Geomorphic and chronological evidence from Cornwall Island in the Canadian HighArctic Archipelago provides direct evidence for the age and dynamics of the center and northern flank of the Innuitian Ice Sheet that covered the islands during the Late
for a recently proposed ice divide spanning the central part of the Canadian HighArctic and indicates that most of the region was glaciated during the Late Wisconsinan.
Heightened sensitivity of a poorly buffered higharctic lake to late-Holocene climatic change
composition and ecology that are markedly different from all other higharctic records documented to date. The results strongly suggest that poorly buffered lakes may provide the most sensitive (diatom-based) paleoclimatic reconstructions in the HighArctic.
A diatom-based paleolimnological investigation was conducted on late Holocene sediments from a poorly buffered lake, informally named Rock Basin Lake, on Ellesmere Island, Arctic Canada. The reconstructions reveal dramatic changes in diatom
Influence of Arctic oscillation on winter climate over China
Arctic Ocean ; Atmospheric circulation ; China ; Climate ; Ocean atmosphere interaction ; Precipitation ; Regression analysis ; Temperature ; Twentieth Century ; Winter
In this study the relationship between the Arctic Oscillation (AO) and climate in China in boreal winter are investigated. Correlation analysis for the last 41 years shows that the winter temperature and precipitation in China change in phase
with AO. Multivariate regression analysis demonstrates that AO and the Siberian High related variance in temperature and precipitation is 35% and 11% respectively. For precipitation, however the portion is rather low, implying that some other factors may
be responsible for the changes in precipitation, in addition to AO and the Siberian High.
HighArctic patchy wetlands : hydrologic variability and their sustainability
Wetlands in the polar desert environment of the HighArctic provide a special ecologic niche for the tundra plants, insects, birds, and animals. This paper examines how these wetlands adjust to short-term fluctuations in the climate, and how
Hydrological connectivity and seasonal storage change of tundra ponds in a polar oasis environment, Canadian HighArctic
This paper examines the hydrological connectivity and the storage status of a cluster of tundra ponds in a HighArctic polar oasis, relating seasonal hydrological changes to lateral drainage, pond water balance and active layer thaw conditions.
A lithium chloride (LiCl) tracer experiment in the summer of 2002 was set up at 3 study sites in the Canadian HighArctic. Soil were extracted and analyzed for vertical and lateral lithium movement one week and one year after initial application
Hydrology and dynamics of a polythermal (mostly cold) HighArctic glacier
Arctic Region ; Canada ; Cold area ; Ellesmere ; Glacial flow ; Glacier ; Glacier dynamics ; Meltwater ; Northwest Territories ; Nunavut ; Polar region ; Thermal regime
of polythermal John Evans Glacier, HighArctic Canada. They monitor the spatial and temporal propagation of high-velocity events, and examine their impacts upon supraglacial drainage processes and evolving subglacial drainage system structure. They assess