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Rocky Mountains subalpine zone
The Rocky Mountains subalpine zone is the biotic zone immediately below tree line in the Rocky Mountains of North America. In Colorado, the subalpine zone occupies elevations approximately from ;〔 while in northern Alberta, the subalpine zone extends from .〔(【引用サイトリンク】work=Alberta Online Encyclopedia )〕
== Climate ==
The climate of the Rocky Mountains subalpine zone is never warm, with summer highs reaching on only the warmest days near the montane zone, and commonly failing to reach near tree line; Frost may occur any day of the year. Although winter low temperatures may be warmer than those in nearby lower valleys, typically staying above , prodigious snows blanket the region well into spring. Some drifts may linger into summer. Convectional precipitation, typically thunderstorms, often forms rapidly and frequently includes graupel or hail. Although uncommon, hurricane-force winds may develop and cause massive destruction such as the Routt Divide Blowdown.
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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