The vanishing snows of Mt. Kilimanjaro
Global Warming purveyors have pointed to the vanishing snow cap of Mt. Kilimanjaro is proof-positive that the climate is warming.
Bzzzzzttttt - not so fast says University of Washington climate scientist Dr. Philip Mote. From the
Seattle Times:
Kilimanjaro not a victim of climate change, UW scientist says
The shrinking snowcap atop Mount Kilimanjaro has become an icon of global warming.
Pictures of the African peak, which has lost 90 percent of its ice cover, were featured in Al Gore's documentary, "An Inconvenient Truth." Greenpeace activists once held a satellite news conference on the summit to sway participants in an international climate conference.
But most scientists who study Kilimanjaro's glaciers have long been uneasy with the volcano's poster-child status.
Yes, ice cover has shrunk by 90 percent, they say.
But no, the buildup of greenhouse gases from cars, power plants and factories is not to blame.
"Kilimanjaro is a grossly overused mis-example of the effects of climate change," said University of Washington climate scientist Philip Mote, co-author of an article in the July/August issue of American Scientist magazine.
And a bit more:
Researchers believe Kilimanjaro's glaciers formed about 11,000 years ago, when the region was undergoing a period of wet weather that allowed snow to accumulate. But even before the first Europeans reached the summit in 1889, the weather has been dry in Eastern Africa. There simply hasn't been enough snowfall to keep up with the loss of ice due to sublimation, Kaser explained.
Sublimation, caused by exposure to sunlight and dry air, occurs when ice essentially skips the melting step and evaporates.
Kaser, who climbs Kilimanjaro twice a year to gather data, says the ice topography shows little evidence that melting is anything but a minor force. Jagged spires and cliffs made of ice up to 120 feet tall are not softened around the edges.
Another contributing factor is the illegal logging on the slopes of the mountain. This allows the warm air to rise without the natural cooling generated by the forest. The global warming pople are cherry picking bits and pieces that advance their ideas nad not looking at the overall big picture.
Posted by DaveH at June 12, 2007 11:52 AM