Desertification is the degradation of land in arid, semiarid and dry areas resulting from various factors including climatic variations, but primarily human activities.
12.
Their extent responds to climatic variations and as this is a wet period in Africa s history, the forests are near their maximum coverage.
13.
The results indicate that Holocene climate has been remarkably stable and have confirmed the occurrence of rapid climatic variation during the last ice age.
14.
Sonoma County, as is often the case with coastal counties in California, has a great degree of climatic variation and numerous, often very different, microclimates.
15.
This gives the region characteristics of a biological island, which, depending on climatic variations, is enriched by intermittent flows of Andean and Patagonian wildlife colonization.
16.
There are important local climatic variations, especially with wind exposure and total precipitation, between the city centre, the airport, and the " �les Sanguinaires ".
17.
The academy cited the men for " fundamental work on developing and applying isotope geological analysis " in studying climatic variations during the Quatenary period.
18.
The role of climatic variation on deep-sea benthos is not well understood, although large-scale changes in the structure of seafloor communities have been observed over the last two decades.
19.
Central Africa is familiar with repeated climatic variation that have caused rain forest and savanna expansion and deflation in consideration of the late Pleistocene tectonics defined the Congo Basin.
20.
Russian, U . S ., and Japanese cooperative studies of deep-drilling core sediments in the 1990s provide a detailed record of climatic variation over the past 6.7 million years.
