GEO130 – OCEANOGRAPHY
The Oceanic Conveyor Belt
The Oceanic Conveyor Belt or Thermohaline Circulation (THC)
Click Here for a NASA article on this topic.
Click Here for a NASA visulaization of the THC
Click Here for an article on the THC
|Arctic Ocean Near Greenland
A Case for Global Warming
|In the basin between Greenland and Baffin Island
dense, saline water sinks to the bottom and is trapped
by a rise that forms a sill.
Each winter as sea ice forms, because of the enhanced salinity
of the water it is more dense and sinks.
See cross section below
|Dr. Ruth Curry at the Woods Hole Oceanographic Institute|
has documented the steady DECREASE in salinity in the basin
since the 1970's
This is caused by either less sea ice froming, increased melting of the Greenland Ice Cap
or a combination of both. All possibilities indicate global warming.
|Typical Arctic Ocean Winter Sea Ice|
|Average Annual Sea Ice Cycle|
|Thinning Arctic Sea Ice|
Blue indicates thinner ice, % shown on scale.