ESCI 401 Lecture Notes - Lecture 23: Isostasy, Firn, Ablation Zone

• School: UNH
• Department: Earth Sciences
• Course: ESCI 401
• Professor: Boettcher, Margaret S.

Document Summary

Snow and granular ice are similar to sediments. They both form from solidification of a melt i: melt: a. b. Ice water: snow and ice like metamorphic rock. Over time = tens to thousands of years. Recrystallization gives us blue ice : this depends on the precipitation in the area, under what conditions do glaciers grow, glacier on land i. ii. iii. i. ii. There"s a line on the glacier that divides the accumulation zone from the ablation zone: accumulation zone = zone where the glacier is growing i. ii, conditions needed: Enough precipitation: below freezing, less solar radiation, atmosphere is cold, windward side of mountains iii. iv. v. Sublimation: melting vapor, taking ice and turning it directly into water, this happens through wind erosion and, chunks of the glacier falling off. Calving (mainly) iii: terminus, bottom of the glacier b. If the glacier ends in the ocean i.