Research show that the impact of climate change on Mount Kilimanjaro is a profound and multi-faceted issue, affecting its iconic glaciers, unique ecosystems, water resources, and the communities that depend on it. The ice fields that have crowned the mountain for over 11,000 years have shrunk dramatically. Since the late 19th century, glacier coverage has decreased by over 90%. The dominant driver is increased air temperature, not just decreased snowfall. Warmer air increases sublimation (ice turning directly to vapor) and melt. At current rates, the remaining glaciers are likely to disappear completely within the next few decades, possibly as early as the 2030s or 2040s.
Kilimanjaro has distinct ecological zones (farmland, rainforest, heath, alpine desert, summit). Climate change is pushing these zones upward. Plant and animal species are migrating to higher elevations to stay within their preferred climate niche. Species adapted to the cold summit regions (like the Kilimanjaro tree giant groundsel) have nowhere higher to go, facing increased risk of extinction.The unique, otherworldly landscape just below the summit is being squeezed from below by encroaching vegetation.
Kilimanjaro is a vital "water tower" for northern Tanzania and parts of Kenya.
The glaciers themselves contribute minimally to direct runoff, but they act as a buffer, releasing water during dry seasons. The mountain's forests are the true water source, acting as a giant sponge that captures moisture from clouds and releases it steadily. Changes in precipitation patterns—more intense rain events and longer dry spells—combined with higher evaporation rates threaten the regularity of water flow in rivers originating from the mountain (e.g., Pangani, Njoro).This affects agriculture, hydropower, and domestic water supply for a large region, potentially increasing conflicts over water resources.
The loss of the glaciers diminishes the mountain's iconic appeal. The changing scenery and potential for more unpredictable weather could alter the trekking experience.Communities on the lower slopes rely on rainfall patterns that are becoming less predictable. This threatens coffee and banana plantations, leading to reduced yields and increased food insecurity.Warmer temperatures at higher elevations could allow disease vectors like mosquitoes to spread to new areas, increasing the risk of malaria and other illnesses for communities .
Climate change doesn't act alone. Its effects are worsened by Deforestation on the lower slopes for agriculture and fuel, which reduces the mountain's water-capturing capacity.