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Seas of sand

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  1. Introduction
  2. The reasons for the Irish "no"
    1. The context of the referendum
    2. The reasons for the rejection
  3. The ways out of the crisis
    1. How did the crisis happen?
    2. What to do now?

At the recent summit in Copenhagen, eleven African countries, led by Senegalese President Abdoulaye Wade, asked the North of funds to build a plant barrier of 7000 x 15 km, in order to stop the advancing sands of the Sahel. Deserts comprise 30% of land area. This space is characterized by high aridity due to the scarcity of rainfall (- 250 mm / year), low population density and poverty of the vegetation. This broad concept includes cold deserts such as the Great Basin (USA) with sastrugi dunes or snow. Nevertheless, our study will focus on hot deserts, which amounted to 16% of the land. These are real sand seas; the most extensive is the Sahara Desert with over 9 million km2. They are located well over 3000 hours of sunshine annually (Paris 1500) and among the hyper-regions (- 50 mm / year). Given its importance, the Sahara will occupy a privileged place in our presentation. The formation of a desert meets several factors including temperature, humidity, terrain, latitude, and distance from the sea and so on. The various regional developments give rise to a variety of hot deserts: intertropical desert (desert Arabian or Gibson, Australia), continental deserts (the Gobi desert, Central Asia), coastal (Atacama, Chile), shelter (Tabernas, Spain). As for the polar deserts, the absence of sand leads us to miss other deserts in the sense of space as the uninhabited desert surrounding Paris French. (JF Gravier). The desert looks like sea salt for its vast expanse, where the sands replace the water and dunes act as waves. The sand seas were short of space previously unknown, feared, but conquered and exploited. Man has always tried to take his hand in the desert. They were the locations and sources of conflict, discovery, history, myths, and meetings. Man and nature have tried to adapt to the constraints imposed by the desert and so far it's hard to know who won. It is in this context that we wonder if the desert is a sea that is insurmountable.

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