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Ocean-Atmosphere Links
Exchange of water, carbon dioxide (gases) and heat.
Surface currents are driven by atmospheric circulation.
Surface Currents
Transfer heat from one place to another.
Keep the upper 100 meters of the ocean well mixed.
The Ocean is Stratified
Oceans and Climate
Heat transferred from the Equator towards the poles.
Example: England has a relatively warm climate at a latitude of Northern Canada.
Thermohaline Circulation
Driven by Density Differences,difference in temperature and salinity.
Completes cycle in 6 yrs.
This great double arch is in the Shetland Islands. The Islands, are the northernmost outposts of the United Kingdom and lie N.E. of northern Scotland.
Land's End is the westernmost part of England. The arch is near Cornwall about 10 miles from Penzance .
Copyright ©2005 Bob Fagley
Copyright ©2005 Bob Fagley
What is a desert?
Less than 250 mm (10 inches) of precipitation.
Generally lacking in vegetation.
Cannot support a large population ??
Types of Deserts (5)
• Controlled by air circulation
Subtropical –• Centered around 30o N and S
latitude
• Geographically extensive
Types of Deserts
Coastal Desert -• Cool dry air blows in from the ocean
and evaporates occurs as it warms.
Types of Deserts
Polar –• Cold air holds very little moisture.• What little precipitation falls
remains as ice for 1000's of years.
Examples: Greenland and Antarctica
Dune Types
Dependent on:• Sand supply• Wind velocity• Variability of wind direction• Surface over which the dune
moves