Chapter 17.3

Chapter 17.3 - Chapter 17.3 Periglacial Landscapes I.a....

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Chapter 17.3 Periglacial Landscapes I.a. Periglacial : describes landscapes with either near-permanent ice cover or at high elevation and seasonally snow-free I.a.i. In subarctic, polar, and tundra climates at high latitudes (tundra and boreal forests) or at high elevation (alpine environments) I.a. Geography of Permafrost I.a.i. Permafrost : develops when soil or rock temperatures remain below 0°C for at least 2 years I.a.i.1. Areas not covered by glaciers is considered periglacial I.a.i. Continuous and Discontinuous Zones I.a.i.1. Continuous permafrost : region of severest cold and is perennial, affects all surfaces except those beneath deep lakes or rivers I.a.i.2. Discontinuous permafrost : gradually coalesce poleward toward continuous zone, becomes scattered until gradually disappears equatorward I.a.i.1.a. Permafrost absent on sun-exposed south-facing slops, areas or war soil, or areas insulated by snow I.a.i.1.b. Most susceptible to thawing--> peat-rich soils release more carbon dioxide into atmosphere
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This note was uploaded on 01/26/2012 for the course 460 476 taught by Professor Adamo during the Fall '11 term at Rutgers.

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Chapter 17.3 - Chapter 17.3 Periglacial Landscapes I.a....

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