|
Most areas of North America that have any economic significance - for agriculture, habitation or siliviculture has been converted and modifiedf for human use. Areas with lower degrees of disturbance [..]
|
|
|
The physical development and ecosystem health of river deltas in cold regions are strongly controlled by ice processes and thus are highly susceptible to the effects of climate change. As an example, [..]
|
|
|
The lower curve shows the correspondence between river flow and water levels under open-water conditions. The much greater maximum water levels possible under ice-jam conditions are illustrated by the [..]
|
|
|
In Canada, recent evidence indicates a shortening of the freshwater-ice season over much of the country with the reduction being mainly attributable to earlier break ups. These trends match those in [..]
|
|
|
The Arctic contains a variety of types of lakes but overall, it is thermokarst lakes and ponds that are the most abundant and productive aquatic ecosystems in the Arctic. They are found extensively in [..]
|
|
|
The harvest of natural resources is a key feature of traditional lifestyles and economies throughout the Arctic, and a continuing reliance on it as a mainstay of indigenous existence in the north is [..]
|
|
|
In northwestern North America, recent warming has led to a dramatic increase in the number of days of above freezing temperatures during the migration period for the caribou (Rangifier tarandus). [..]
|
|
|
The harvest of natural resources is a key feature of traditional lifestyles and economies throughout the Arctic, and a continuing reliance on it as a mainstay of indigenous existence in the north is [..]
|
|
|
Current and projected Ranges of Beech Trees in the US.
A warmer climate may have significant effect on the forests. Decidous forests will probably move northwards and to higher altitudes, replacing [..]
|
|
|
Depending on the definition of the boundaries of the region, the Arctic is home to some 4 million inhabitants. Roughly one-third of this total population is indigenous peoples, spread over numerous [..]
|
|
|
Mountain snow cover typically develops in the autumn and grows to a maximum depth in early spring. As day length and sun angles increase, so do air temperatures, causing snow cover to warm and begin [..]
|
|
|
Data from many sources and at several scales suggest that recent climate change is already affecting terrestrial Arctic ecosystems. Comparisons of historical and contemporary aerial photographs [..]
|
|
|
Over recent years, the southern limit of permafrost in northern peatlands has retreated by 39 km on average and by as much as 200 km in some parts of Arctic Canada. Although regional warming by 1.32°C [..]
|
|
|
A large iron mine, operated by the Baffinland Iron Mines Corporation, has now been proposed in Baffin Island, with possibly severe impacts on wildlife on the island, such as development across the [..]
|
|
|
Temperature monitoring in Canada indicates a warming of shallow permafrost over the last two to three decades. Since the mid-1980s, shallow permafrost (upper 20-30 m) has generally warmed in the [..]
|
|
