Week 10, The Cryosphere
Week 10, The Cryosphere ENVS 101 004
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This 1 page Class Notes was uploaded by Bianca Notetaker on Saturday October 24, 2015. The Class Notes belongs to ENVS 101 004 at University of New Mexico taught by Priewisch in Summer 2015. Since its upload, it has received 29 views. For similar materials see The Blue Planet in Environmental Science at University of New Mexico.
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Date Created: 10/24/15
10242015 OneNote Online Elements of the Cryosphere Tuesday October 20 2015 942 AM Glaciers 0 Form due to accumulation compression and recrystallization snowflakes become smaller and smaller during this process 0 They sculpt the lands with their slow flows scrape up weathered rock files rocks carries away sediment either large boulders or fine sediment 0 Persistent body of ice consisting mainly of recrystallized snow 0 Types of glaciers Cirgue the smallest kind Valley between hills Piedmont spreads out from a valley Ejord drowned seaward end of glacier o Glaciers and people Form rich agricultural land in the Midwest and Central Europe 0 Contain valuable mineral resources gold silver platinum Help moderate the flow of water 0 Glaciers as environmental archives Can be several hundredthousand years old Provide us with ice cores which give us evidence for volcanic eruptions and layers of refrozen meltwater They also contain gases that give us previous atmospheric conditions Ice sheets 0 Continent sized ice sheets overwhelm nearly all the land with their large margins 0 Ex the Greenland ice sheet covers 17 million km2 0 Ice shelves 0 Thick floating platform of ice that forms where an ice sheet meets the surface of the ocean looks like a cliff Permafrost 0 Land beyond the limit of glaciers in periglacial regions 0 In circumpolar zones and high latitude areas 0 When permafrost thaws in becomes unstable which means everything on it has the potential to collapse Sea ice 0 23 of earths persistence ice cover floats as a thin veneer on polar oceans 0 Forms during glacial periods when oceans are more salty 0 During interglacial periods sea ice melts because there is less ice 0 Consists of freshwater 0 Salt water sinks to the bottom of the ocean Polar ice 0 Linked to the ocean and the atmosphere 0 Drives major wind systems 0 Plays an important role in the worlds climate 0 Influences albedo of the planet Glaciation 0 Earth fluctuates between periods of cooler and warmer periods 0 Glaciation periods periods during wich earths surface temperature drops by several degrees 0 Interglacial periods when earths temperature rises by several degrees httpsonenoteofficeappsIivecomoonenoteframeastFiSDE50F6024D8D962EO407ampHemuIampC5810SNZSKYWACWSHIampuienUSamprs 11
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