articles

The new Arctic Now product developed by the Finnish Meteorological Institute shows with one picture the extent of the area in the Northern Hemisphere currently covered by ice and snow.

The mountains of East Africa are a treasure trove of biodiversity. However, their ecosystems may be at a higher risk than previously realized. Dr. Andreas Hemp and Dr. Claudia Hemp have discovered that Mount Kilimanjaro is turning into an "ecological island". Agriculture and housing construction have eliminated the natural vegetation that used to serve as a bridge to the surrounding area, enabling the diversity of species to develop to its current levels. Neighbouring mountain regions are presumably also being isolated from their surrounding areas. The researchers have published their study in the journal Global Change Biology.

More accurate maps of bed topography reveal physical processes controlling retreat.

The eastern Mediterranean — an area that covers Israel, Egypt, Jordan, Syria, Lebanon and southern Turkey — is experiencing monumental climate changes poised to significantly affect regional ecosystems and human health. According to a new Tel Aviv University study, these changes will alter the duration of summer and winter in the region by the end of this century.

The impacts of global warming are felt especially in mountainous regions, where the rise in temperatures is above average, affecting both glacierized landscapes and water resources. The repercussions of these changes are manifold and varied, from retreating glaciers to an increase in the frequency and intensity of snow avalanches. A team of researchers from the University of Geneva (UNIGE), Switzerland, has employed dendrochronology– the reconstruction of past disasters as recorded in growth series of trees– to disentangle the role of global warming in the triggering avalanches. The results of this study are published in the Proceedings of the National Academic of Science – PNAS.