Kven in Norway. Consonant gradation is a feature in both Finnish and northern Sami dialects, but it is not present in south Sami, which is considered to have a different language history. The northern portion of the Caucasus is known as the Ciscaucasus and the southern portion as the Transcaucasus. The atmosphere is a chaotic system, so small changes to one part of the system can grow to have large effects on the system as a whole. During rains precipitation, the water droplets absorb and dissolve carbon dioxide from the surrounding air. A recent example of weather control was China's preparation for the 2008 Summer Olympic Games. Shaped by global plate tectonic forces that have created the East African Rift, East Africa is the site of Mount Kilimanjaro