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2 Mountains 3 Water 4 Climate |
Alberta is a fertile province, as the eastern and southern portions its surface consists chiefly of plains that are almost entirely treeless. As the slopes of the Rocky Mountains to the west are reached more trees are found, until in the foothills of the mountains bodies of forest timber occur. Trees also become more numerous in the northern part of the province, until in the region north of the North Saskatchewan River forests are again met with. From the southern boundary line for 2.5° north the prairie is dry, but of good soil, which grows excellent crops when irrigated. North of this region the surface of the province is of most fertile soil, the ordinary rainfall sufficing for agriculture. Alberta also has large oil reserves, especially in the Athabasca Tar Sands in the north of the province.
The appearance of the prairie section of the province is that of undulating meadows, with rounded sloping ridges covered with shorter grasses, which serve for the support of large herds of beef cattle. The wooded portions of the terrain are dotted with clumps and belts of trees of moderate size, giving them a park-like appearance. In winter it is continuously very cold, but this is occasionally reduced by warm winds from the west, known as the Chinook.
Within a hundred miles of the mountains there is constantly in view, in clear weather, a line of snowy peaks along the western horizon. This continues for hundreds of miles northwestward. The Rocky Mountains are ascended by a gradual approach from the east, but are exceedingly abrupt on their transalpine slope in British Columbia. The peaks of these mountains are majestic, many of them reaching a height of more than two miles above the sea. Among the more notable of these are:
With the exception of the southern section, the province of Alberta may be said to be well watered. Rising from numerous valleys on the Alberta declivity of the Rocky Mountains between the international boundary line and 52° north are streams which unite to form the Belly River, and farther north the Bow River. Running eastward these two rivers unite about 112° west, and flow on under the name of the South Saskatchewan River. North of 52° north many small streams unite to form the Red Deer River, which flowing southeastward joins the South Saskatchewan near 110° west. Between 52° and 53° north rises the great river, the North Saskatchewan. It receives a southern tributary, the Battle River, which joins it about 108° west. Pursuing their courses eastward the North and South Saskatchewan rivers unite in the Saskatchewan River (Cree, rapid-flowing river), which finds its way to Lake Winnipeg, and thence by way of Nelson River to Hudson Bay. It is one of the mightiest rivers of the continent.
At Mount Athabasca, there is an unusual occurrence where the water flows either to the Pacific ocean on the western slope, the Arctic ocean on the northeast, and the Atlantic Ocean on the southeast.
In the northern part of the province, between 53° and 54° north, all the waters of Alberta flow toward the Arctic Ocean. Starting at Mount Athabasca, the Athabasca River runs north and empties into Lake Athabasca near 58° north. North of 56° north flows through and from the Rocky Mountains as the Peace River. After descending northeastward to within a few miles of Lake Athabasca, it is met by a stream emerging from that lake. The united river carrying down the waters of the Athabasca slope is called the Slave River, which, passing through Great Slave Lake, emerges as the great Mackenzie River, which falls into the Arctic Ocean. Alberta thus gives rise to the two great rivers, the Saskatchewan and the Mackenzie.
While a number of fresh-water, or in some cases brackish, lakes each less than 260 km² (100 mi²) in extent are situated in Alberta, two of more considerable size are found. These are Lake Athabasca, 7898 km² (3085 mi²) in extent, of which a part is in the province of Saskatchewan, and the other Lesser Slave Lake some 1550 km² (600 mi²) in area.Terrain
Mountains
Historically travel through these mountains was difficult, and alpine passes became very important. The most noted of the Alberta passes are:Water
| Climate | Places | Above the Sea | Mean Winter Temp |
|---|---|---|---|
| (A) Moderate and changeable | Medicine Hat, lat. 50° N. | 2171 ft. 651 m | 14.3°F -9.8°C |
| Calgary, lat. 51° | 3432 ft. 1049 m | 15.4°F -9.2°C | |
| Banff, lat. 51.5° | 4515 ft. 1355 m | 15.9°F -8.9°C. | |
| (B) Steady | Edmonton, lat. 53.5° | 2210 ft. 663m | 10.3°F -12.1°C |
| (C) Severe | Fort Chipewyan, lat. 59° N. | 600 ft. 180 m | 7.2°F -13.8°C |
Climate (A) allows, in what is a great ranching district, cattle to run at large through the whole winter. Through the mountain passes come at times dry winds from the Pacific coast, which lick up the snow in a few hours. These winds are known as Chinook winds. While elevating the temperature they bring more moisture into the air and produce a change not entirely desirable.
Climate (B) is the steady winter climate of Edmonton district. This while averaging a lower temperature than (A) is not so subject to change; it retains the snow for sleighing, which is a boon to the farmer. This climate is much less influenced by the Pacific winds than (A).
Climate (C), that of Fort Chipewyan, having a mean winter temperature of 4.6°C lower than Calgary, is a decidedly sub-arctic climate. It is the region in winter of constant ice and snow, but its lower altitude gives it a summer climate with a mean temperature of only 0.9°C less than Calgary, and 1.0°C less than Edmonton.