Changements climatiques dans la péninsule arabique durant le Pléistocène supérieur et l'Holocène.

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Abstract
The paleoclimatic evolution of the Arabian peninsula is not well known so far. Two humid phases, dated respectively 30 kyr to 20 kyr BP and 10 kyr to 6 kyr BP, have often been described. On the western Oman piedmont and on the Red Sea shores, two older and more important humid phases can be traced. Three of these wet periods fit well with a shifting to the north of the monsoon summer rains, as observed in the Sahara, related with an insolation forcing; they correspond with Interglacials. The first wet period can be situated during the isotopic stage 5e, the second one during the stage 5a, followed by a progressive drying up which allowed the elaboration of a huge piedmont glacis; the fourth one is Holocene. It is more difficult to date and to interpret the third one, clearly more important than the last one : it could be related to a shifting to the south of the temperate

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