Dust and Sand Storms （DSS） originating in deserts in arid and semi-arid regions are events raising global public concern. An important component of atmospheric aerosols, dust aerosols play a key role in climatic and...Dust and Sand Storms （DSS） originating in deserts in arid and semi-arid regions are events raising global public concern. An important component of atmospheric aerosols, dust aerosols play a key role in climatic and environmental changes at the regional and the global scale. Deserts and semi-deserts are the main source of dust and sand, but regions that undergo vegetation deterioration and desertification due to climate change and human activities also contribute significantly to DSS. Dust aerosols are mainly composed of dust particles with an average diameter of 2 l.tm, which can be transported over thousands of kilometers. Dust aerosols influence the radiation budget of the earth- atmosphere system by scattering solar short-wave radiation and absorbing surface long-wave radiation. They can also change albedo and rainfall patterns because they can act as cloud condensation nuclei （CCN） or ice nuclei （IN）. Dust deposition is an important source of both marine nutrients and contaminants. Dust aerosols that enter marine ecosystems after long-distance transport influence phytoplankton biomass in the oceans, and thus global climate by altering the amount of CO2 absorbed by phytoplankton. In addition, the carbonates carried by dust aerosols are an important source of carbon for the alkaline carbon pool, which can buffer atmospheric acidity and increase the alkalinity of seawater. DSS have both positive and negative impacts on human society： they can exert adverse impacts on human＇s living environment, but can also contribute to the mitigation of global warming and the reduction of atmospheric acidity.展开更多
基金Acknowledgements This study was supported by the National Special Scientific Research Fund with Public Welfare in Forestry Field （Grant No. 201404304-4）, the National Natural Science Foundation of China （Grant Nos. 31570710 and 31100518）, the National Key Research and Development Program of China （Grant No. 2016YFC0500801-03）, and the Lecture and Study Program for Outstanding Scholars from Home and Abroad （Grant No. CAFYBB2011007）. CGS acknowledges the financial support of NASA Headquarters under the NASA Earth and Space Science Fellowship Program （Grant No. 14-EARTH14F-241） and of the Science, Technology, and Environmental Policy Fellowship from the Princeton Environmental Institute.
文摘Dust and Sand Storms （DSS） originating in deserts in arid and semi-arid regions are events raising global public concern. An important component of atmospheric aerosols, dust aerosols play a key role in climatic and environmental changes at the regional and the global scale. Deserts and semi-deserts are the main source of dust and sand, but regions that undergo vegetation deterioration and desertification due to climate change and human activities also contribute significantly to DSS. Dust aerosols are mainly composed of dust particles with an average diameter of 2 l.tm, which can be transported over thousands of kilometers. Dust aerosols influence the radiation budget of the earth- atmosphere system by scattering solar short-wave radiation and absorbing surface long-wave radiation. They can also change albedo and rainfall patterns because they can act as cloud condensation nuclei （CCN） or ice nuclei （IN）. Dust deposition is an important source of both marine nutrients and contaminants. Dust aerosols that enter marine ecosystems after long-distance transport influence phytoplankton biomass in the oceans, and thus global climate by altering the amount of CO2 absorbed by phytoplankton. In addition, the carbonates carried by dust aerosols are an important source of carbon for the alkaline carbon pool, which can buffer atmospheric acidity and increase the alkalinity of seawater. DSS have both positive and negative impacts on human society： they can exert adverse impacts on human＇s living environment, but can also contribute to the mitigation of global warming and the reduction of atmospheric acidity.
