Cold environments - Global distribution
- Created by: darcie_cl
- Created on: 20-02-14 09:59
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- Cold environments - Global distribution
- Types of cold environment
- Glacial
- ice sheets + glaciers
- Periglacial - tundra
- no vegetation + permafrost + edge of ice areas
- Alpine
- mountains + glaciers + permafrost + ice caps + tundra vegetation
- Glacial
- Climatic change through history
- Temperature fluctuates through history - currently in an interglacial period
- Number of warmer places has increased as earth's temperature has increased
- We know this through; valleys, sediment analysis, CO2 in ice cores and historical evidence (River Thames)
- INTERSTADIAL = warm period in a glacier
- STADIA L = cold period in a glacial
- Milankovich Cycles
- Changes in orbit
- SPHERICAL - warmer earth temperature
- ELLIPTICAL - cooler earth temperature
- Changes in tilt
- Tilting applys warming and cooling effect
- Rotating/orbiting in relation to the sun causes natural climate change
- Changes in orbit
- Other reasons
- Sunspot activity - cloud cover increases = cuts sun rays = cooler earth
- Volcanic activity - ash clouds scatters sun radiation = prevents rays reaching earth's surface = cooler earth
- Ocean currents - ocean currents stop due to reduced salinity due to glacial melting = cooler ocean surrounding countries
- Types of cold environment
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