Abstract：There is a scientific debate argument whether Loess Plateau is an important region of dust aerosol sinks or sources. Based on the 10-year (1995~2004) aerosol simulations of the northern aerosol regional climate model NARCM, the spatial distribution of dust aerosol emissions, depositions and budgets as well as wind field were analyzed. The simulation analysis showed 1) the highest dust emissions appeared in the desert and desertification areas, while the highest dust depositions were concentrated over the desert and desertification areas as well as their immediately downwind region.The dust depositions largely exceeded the dust aerosol emission in Loess Plateau with the low dust emissions. 2) Desert and desertification area were the main dust sources, the rest of areas were dust sinks. Dust depositions declined from the northwest to the Southeast.3) Due to the barrier of the Taihang and Qinling Mountains, the Loess Plateau was the largest dust sink region with the highest depositions. The loess over Loess Plateau was accumulated by dust depositions over the long term evolution of glacial and interglacial periods. The dust aerosol simulation provided a solid evidence for the theory of eolian loess.
刘唯佳, 韩永翔, 赵天良. 黄土高原黄土的成因:沙尘气溶胶源汇模拟与黄土堆积[J]. 中国环境科学, 2014, 34(12): 3041-3046.
LIU Wei-Jia, HAN Yong-Xiang, ZHAO Tian-Liang. The causes of loess formation over Loess Plateau: simulated dust aerosol sources and sinks and loess accumulation. CHINA ENVIRONMENTAL SCIENCECE, 2014, 34(12): 3041-3046.
