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Alaska Rivers of Ice.docx

4 Pages

Course Code
GEO 110
Abednego Aryee

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Description rivers-of-ice Radio eco sounding: shape and thickness GPS: retreat, actual location—determine longitude and latitude, direction of movement, location, elevation (height) Radar: thickness, size, use regardless of condition of atmosphere or weather Land sat: Alaska Rivers of Ice: Glaciers - number of glaciers have increased - water: gas, liquid, solid o 2.8% fresh water  2.1% glacier o 97.2% ocean - Can be found in: Antarctica (most-91.4), Greenland, north America, Asia, rest of the world - 3.1% of world is covered with glacier - Glacier: ice and rock, moving down hill as a result of gravity - Glacier Ice: o Evolves from snow, 6 sided crystal… alters: density (weight), volume and layers o Density of glacier ice: 0.9 o Impermeable to air and water o Appears blue because absorb all but reflects blue o Pressure bubbles- sizzling noise (equilibrium); example: stranded icebergs o Least resistance, change streams to U shaped - Ice sheets: o Antarctica and Greenland o Ice shelf: extend into ocean (Ross ice shelf) o Thermal:  Temerant- liquid water form via melting  Polar- below frezzing point, liquid water never formed o Rock- no visible ice, move slowly o Reconstritued glacier- pressure joins ice blocks, ice falling - Difference: Aret and seck glacier - Folia - Permafrost - Althatherma - Neoglaciatation - Accumulation- gain - Ablation- lose Other: - firm: 0.4-0.8 o Folia - Moulin- streams in icebergs (in the middle) PRODUCTIVE FISHING GROUDS FACTORS- DECLINE IN FISHRY SUSTAINABLE FISHING PRATICES Name ________________________ Empty Oceans, Empty Nets Study Questions Where is life in the ocean most concentrated? Over the continental shelf (near shore which makes it more accessible to humans) What is the first and simplest reason fish stocks are collapsing at faster rate then ever? Fish are being caught at a rate faster than they reproduce. As larger fish disappear, what is the global fleet doing in response? What is the problem with this approach? As the larger fish disappear the fleet is targeting smaller f
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