Misture evolution in Central Asia during Holocene-A review

Abstract

A general review account of the late-Quatenary moisture history of monsoonal Central Asia inferred from the published literature 1.2 is given . All studies show high effective moisture form the area dominated by the India Monsoon during the early Holocene , suggesting Holocene optimal climate conditions . In contrast , areas which are dominated by the South-East Asian monsoon and the Westerlies, optimal condition prevailed their during the mind-Holocene. These apparent in the Holocene. Strengthened insolation during the early Holocene , possibly caused an enhanced low-level convergence over the Tibetan Plateau which results in the intensification of the summer monsoon, Tibetan Plateau experienced strong air uplift which caused intensified precipitation and air divergence in the upper troposphere. This divergence over the plteau led an intensified descent of air masses and consequently increased aridity in the area adjacenmt to the north. The majority of the palaeoclimatic records suggest reduced effective moisture since the late Holocene in the region.