Glacier loss on Kilimanjaro continues unabated
2009
Thompson, L.G. | Brecher, H.H. | Mosley-Thompson, E. | Hardy, D.R. | Mark, B.G.
The dramatic loss of Kilimanjaro's ice cover has attracted global attention. The three remaining ice fields on the plateau and the slopes are both shrinking laterally and rapidly thinning. Summit ice cover (areal extent) decreased [almost equal to]1% per year from 1912 to 1953 and [almost equal to]2.5% per year from 1989 to 2007. Of the ice cover present in 1912, 85% has disappeared and 26% of that present in 2000 is now gone. From 2000 to 2007 thinning (surface lowering) at the summits of the Northern and Southern Ice Fields was [almost equal to]1.9 and [almost equal to]5.1 m, respectively, which based on ice thicknesses at the summit drill sites in 2000 represents a thinning of [almost equal to]3.6% and [almost equal to]24%, respectively. Furtwängler Glacier thinned [almost equal to]50% at the drill site between 2000 and 2009. Ice volume changes (2000-2007) calculated for two ice fields reveal that nearly equivalent ice volumes are now being lost to thinning and lateral shrinking. The relative importance of different climatological drivers remains an area of active inquiry, yet several points bear consideration. Kilimanjaro's ice loss is contemporaneous with widespread glacier retreat in mid to low latitudes. The Northern Ice Field has persisted at least 11,700 years and survived a widespread drought [almost equal to]4,200 years ago that lasted [almost equal to]300 years. We present additional evidence that the combination of processes driving the current shrinking and thinning of Kilimanjaro's ice fields is unique within an 11,700-year perspective. If current climatological conditions are sustained, the ice fields atop Kilimanjaro and on its flanks will likely disappear within several decades.
Показать больше [+] Меньше [-]Ключевые слова АГРОВОК
Библиографическая информация
Эту запись предоставил National Agricultural Library