SGER: Quantifying the Relationships Between Dust Source Variability, Dust Emissions, and Air-to-Sea Deposition

本研究项目是中国沙源变化的一个实例研究。其目标是量化土地利用变化，特别是沙漠化造成的土地利用变化对尘埃排放、大气负荷和向太平洋沉积的影响。利用中国沙尘源区的数据进行实证分析，探讨各沙尘源区之间的关系。大气输送和化学模型（MATCH, v. 4.2）将用于模拟具有改进源发射函数的粉尘排放、输送和沉积。研究结果将有助于更好地理解和预测尘源变化对大气成分和气候的影响。在全球海洋的几个大区域的地表水中，粉尘也是浮游植物生长的重要营养物铁的重要来源，因此更好地量化风成铁来源对全球生物地球化学循环的研究具有重要意义。此外，该项目将促进国际合作和数据共享。

This research project is a case study of the variability of dust sources in China. The goal is to quantify the impact of land-use changes, in particular those due to desertification, on the magnitude of dust emissions, loading in the atmosphere and deposition to the Pacific Ocean. Empirical analyses will be carried out using data collected over the dust source regions in China to investigate the relationships among the sources. The Model of Atmospheric Transport and Chemistry (MATCH, v. 4.2) will be used to simulate dust emissions, transport, and deposition with the improved source emission functions. The results from this work will contribute to a better understanding and prediction of the impacts of changes in dust sources on atmospheric composition and climate. Dust is also an important source of iron, a critical nutrient for phytoplankton growth, in the surface waters of several large regions of the global ocean, so a better quantification of the aeolian iron source has significant impacts on research in global biogeochemical cycles. In addition, this project will foster international collaboration and the sharing of data.