Oceans Are Sponges… They Become Saturated
Friday, July 3rd, 2009I was watching NOW on PBS tonight and one of their stories was a “check-up” on global warming. The marine scientist that they interviewed said that scientists have known about global warming for decades. In addition, she explained somewhat how the oceans react to the planet warming up. The ratio of land area to ocean area is 1 to 2.43, respectively. The oceans have a huge impact on our planet’s weather systems. They absorb a lot of the gasses and heat in the atmosphere. A major reason why these huge masses of water can absorb the quantity of heat that they are is the ice caps. A simple experiment that can be done to test this is to put ice in a beaker on a burner with a thermometer in the beaker to take measurements. First, turn the burner on high and take measurements every thirty seconds. If you plot the results out on a graph, you will see that the temperature of the water is relatively slow in rising until the ice melts. Then it starts to rise at an alarming rate in comparison to while the ice was still melting. The scientist being interviewed says to compare these results to the ocean. If this is right, once the ice caps melt, the oceans will rise quickly in temperature. This experiment would be more accurate if salt water were used because salt raises the boiling point of water and lowers the freezing point, thus making it more sluggish. (Ocean water is approximately 3.5% salt – that’s 35,000 parts per million – if you want to try it.) I find these findings very alarming and think you should see the segment for yourself:
http://www.pbs.org/now/shows/527/oceans-climate-change.html
In addition to this, I found an article regarding the oceans’ absorption of carbon dioxide. It explains that the absorption of carbon dioxide into the oceans has slowed around Hawaii (and all over the Pacific) due to a decrease in precipitation causing more evaporation. These both make salt concentrate near the surface. Read it for yourself.
A wonderful way to better understand the Greenhouse Effect is to watch this animation: http://earthguide.ucsd.edu/earthguide/diagrams/greenhouse/

