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单词 Glacial cirque
释义

Glacial cirque

中文百科

冰斗 Cirque

(重定向自Glacial cirque)
冰斗湖
冰斗形成示意图
冰斗冰川
Two cirques with semi-permanent snowpatches near Abisko National Park, Sweden

冰斗(英语:cirque)是由山地冰川侵蚀而形成的,一种三面环山的凹地,如果冰已经消失,也被称为围谷。

冰斗形成于雪线附近的积雪凹地由于随季节和昼夜温度的变化,积雪融化和冻结反复进行,融水渗入岩石裂缝,冻结后膨胀,使岩石崩解碎裂,碎屑被融水带走形成一个凹地,凹地积雪越来越多,侵蚀加剧,当积雪形成冰过多,会在出口形成冰川。

当气候变化,冰川消失,围谷的位置会指示古代雪线的位置。

英语百科

Cirque 冰斗

(重定向自Glacial cirque)
Two cirques with semi-permanent snowpatches near Abisko National Park, Sweden
Upper Thornton Lake Cirque in North Cascades National Park, US
Formation of cirque and resulting tarn
The Lower Curtis Glacier in North Cascades National Park is a well-developed cirque glacier; if the glacier continues to retreat and melt away, a lake may form in the basin

A cirque (French, from the Latin word circus) is a theatre-like valley formed by glacial erosion. Alternative names for this landform are corrie (from Scottish Gaelic coire meaning a pot or cauldron) and cwm (Welsh for "valley", pronounced coom). A cirque may also be a similarly shaped landform arising from fluvial erosion.

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更新时间:2025/6/23 3:37:33