干旱区生态环境知识资源中心

The Central Asian Arid Zone (CAAZ) located in the temperate desert belt of the Northern Hemisphere is one of the most important sources for global aeolian dust and aerosol. It is widely acknowledged that aeolian dust plays a vital role in the Earth system through participating in the energy and material budget of the planet. Except for the existed natural desert areas, the newly human-induced deserts that originally used to be the bed of terminal lakes (like the Aral Sea, Caspian Sea, Balkhash Lake, etc.) are becoming the much more significant sources for aeolian dust/salt in this region. Dust and associated aerosols have complex impacts on local ecological system and human health for its special chemical composition. In recent years, a slight declining trend of dust storm frequency in the region was reported, which may be explained by the weakened human disturbances in desert areas or climate variations. The dust dynamics in the CAAZ represent considerable variations in both spatial and temporal distribution, which makes it harder to forecast the dust events and mitigate its damages to ecosystems and social economics. Nevertheless, there is not much evidence of its climatic and environmental impacts both on the regional and global scales. Therefore, further related studies and regulation measures in the region are essential and emergent, as well as the strengthening cooperation between the associated countries and organizations.