Saturday, 5 May 2007

Effects of Global Warming

There are two major effects of global warming which are:

1) Increase of temperature on the earth by about 3° to 5° C (34° to 41° Fahrenheit) by the year 2100.
2) Rise of sea levels by at least 25 meters (82 feet) by the year 2100.

Increasing global temperatures are causing a broad range of changes. Sea levels are rising due to thermal expansion of the ocean, in addition to melting of land ice. Amounts and patterns of rainfall are changing. The total annual power of hurricanes has already increased markedly since 1975 because their average intensity and average duration have increased (in addition, there has been a high correlation of hurricane power with tropical sea-surface temperature).

Changes in temperature and precipitation patterns increase the frequency, duration, and intensity of other extreme weather events, such as floods, droughts, heat waves, and tornadoes. Other effects of global warming include higher or lower agricultural yields, further glacial retreat, reduced summer stream flows, species extinctions. As a further effect of global warming, diseases like malaria are returning into areas where they have been extinguished earlier.


http://timeforchange.org/cause-and-effect-for-global-warming


One effect not popularly mentioned is that as the weather gets unpredictable in response to rapid global warming, parasitism against caterpillars will decrease, biologists warn in a new study. This will free the caterpillars to devour agricultural fields and strip leafy forests bare.

"That's really of great concern, especially to agricultural systems where we rely on several of these parasites. They keep outbreaks from occurring," said Lee Dyer, a biologist at Tulane University in New Orleans, Louisiana.


More on the topic you can go to:

http://news.nationalgeographic.com/news/2005/11/1116_051116_caterpillar.html

1 comment:

Hedley said...

Hi Awad,

Like your entries on cows and coral, an interesting perspective on the problem.

Hedley.