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Alaska-St. Elias Range tundra : ウィキペディア英語版
Alaska-St. Elias Range tundra

The Alaska-St. Elias Range tundra is an ecoregion of northwestern North America.
==Setting==
This ecoregion consists of a long range of high rocky mountains of the Alaska Interior running north from the bottom of the Alaska Peninsula, eastwards taking in the Alaska Range and southwards to include the Wrangell and St. Elias Mountains in eastern Alaska on the Canadian border as far as Yakutat Bay. Across in Canada the ecoregion includes the southwestern corner of the Yukon Territory and the northwestern corner of British Columbia. These mountains are largely covered with permanent ice and snow, with permanent snow above about 2150 m, and are separated by valleys filled with ice fields and great glaciers. There are small patches that are not under ice and consist of rock, rubble and alpine tundra. Elevations of the ecoregion range from sea level (on the western coast) to 600 m in the valleys, to peaks over 4,000 m. Indeed Denali (Mount McKinley), the highest peak in North America at 6,100 m, is located here, while the St Elias Mountains reach as high as 6000 m and are some of the highest peaks in Canada. This ecoregion is largely separated from the coast by the Pacific coastal mountain icefields and tundra so the climate is continental. Rainfall varies from 200 mm per year on the higher slopes to 400 mm per year in the lower areas.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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