Shrinking Icecap On Kilimanjaro Not Due To Global Warming

The dwindling icecap of Tanzania’s Mount Kilimanjaro (pictured) has assumed something like iconic status for those seeking to dramatically illustrate the supposed effects of human-induced global warming. But an article penned by two researchers in the current edition of American Scientist asserts that global warming has nothing to do with the decline of Kilimanjaro’s icecap.

Climatologist Philip Mote, from the University of Washington, said that while there are dozens of mid-latitude glaciers that are shrinking because of a warming climate, the processes at work on tropical Kilimanjaro are far different.

Mote, and Austrian glaciologist Georg Kaser, say that the decline in Kilimanjaro’s ice has been going on for more than a century and that most of it occurred before 1953, while evidence of atmospheric warming there before 1970 is inconclusive.

Kilimanjaro’s shrinking icecap was featured in the Academy Award-winning documentaryAn Inconvenient Truth, but the researchers say that linking it to global warming is simply inaccurate.

Instead of a warming atmosphere, they attribute the ice decline primarily to complex interacting factors, including the vertical shape of the ice’s edge, which allows it to shrink but not expand; and decreased snowfall, which reduces ice buildup and determines how much energy the ice absorbs.

Since the air near Kilimanjaro’s summit is almost always well below freezing, there is typically no melting because of air temperature. Rather, the researchers claim, the ice loss on Kilimanjaro is driven strictly by solar radiation through a process called sublimation. Sublimation occurs at below-freezing temperatures and converts ice directly to water vapor without going through the liquid phase. “The decline is most likely associated with processes dominated by sublimation and with an energy balance dominated by solar radiation, rather than by a warmer troposphere,” the scientists write.

Additionally, they speculate that fluctuating weather patterns in the Indian Ocean could also affect the shifting balance between the ice’s increase, which might have occurred for decades before the first explorers reached Kilimanjaro’s summit in 1889, and the shrinking that has been going on since.

Related articles:
Greenhouse Gases Taking The Heat For Dirty Snow
Glacier Behavior Confounds Climate Pundits
Equatorial Glaciers Set To Disappear In 20 Years

Source: University of Washington

, ,

Comments are closed.

Walt Disney World Men L beige Kilimanjaro Safaris Full Zipped Vest  picture

Walt Disney World Men L beige Kilimanjaro Safaris Full Zipped Vest

$50.15



Mount Kilimanjaro Medal (new design) picture

Mount Kilimanjaro Medal (new design)

$27.50



Disney's Animal Kingdom Kilimanjaro Safaris Baseball Hat Adult Light Green picture

Disney's Animal Kingdom Kilimanjaro Safaris Baseball Hat Adult Light Green

$11.89



AROUND KILIMANJARO MOUNTAIN Magic Lantern Glass Slides LOT OF 6 Mega Rare TRAVEL picture

AROUND KILIMANJARO MOUNTAIN Magic Lantern Glass Slides LOT OF 6 Mega Rare TRAVEL

$40.00



Mt. Kilimanjaro Seven Summits Decal Sticker picture

Mt. Kilimanjaro Seven Summits Decal Sticker

$4.99



Kilimanjaro DW Linerlock Knife by Daniel Winkler 910143 picture

Kilimanjaro DW Linerlock Knife by Daniel Winkler 910143

$75.66



Disney WDW Universal Collectible Pins LE Hidden Mickey Individual Set Choice picture

Disney WDW Universal Collectible Pins LE Hidden Mickey Individual Set Choice

$99.99



KILIMANJARO MADE IN TANGANYIKA (290) MEERSCHAUM LINED BENT DUBLIN ESTATE PIPE picture

KILIMANJARO MADE IN TANGANYIKA (290) MEERSCHAUM LINED BENT DUBLIN ESTATE PIPE

$35.00



5

5" kilimanjaro tanzania blue mountain bumper sticker decal made in usa

$16.99



KILIMANJARO STRAIGHT SANDBLA MEERSCHAUM MADE IN TANGANYIKA(192) PIPE (SKU #1031) picture

KILIMANJARO STRAIGHT SANDBLA MEERSCHAUM MADE IN TANGANYIKA(192) PIPE (SKU #1031)

$33.75



Powered by WordPress. Designed by WooThemes