针对剧烈人类活动和全球变化导致的大气气溶胶浓度升高对森林生态系统碳水耦合过程的影响机理这一关键科学问题，采用涡度相关技术连续测定森林生态系统与大气间二氧化碳、水和能量通量，通过同步测定小气候要素并结合气溶胶反演，量化并比较不同气溶胶浓度引起环境因素（云量、辐射、温度等）的变化对森林生态系统碳循环、水循环以及水分利用效率的直接和间接影响；探究大气气溶胶对森林生态系统碳水耦合生物物理控制机理的影响；建立包含大气气溶胶模块的生态系统碳水耦合过程模型，利用站点多年实测数据对模型进行参数化和验证。本项目研究将进一步丰富生态水文理论、提高森林生态系统碳汇功能评价的准确性，并为制定旨在提升森林生态服务功能的经营管理策略提供科学依据。

It is a rarely investigated yet significant key scientific question on what the governing mechanisms are for the effects of atmospheric aerosols on the carbon and water exchange between forest ecosystem and atmosphere as the intensified human activities and the global change has occurred during the past decades. Here we designed to use eddy covariance technique to continuously measure the carbon dioxide, water and energy fluxes between a forest ecosystem and the atmosphere, as well as the microclimate observations and the atmosphere aerosols inversion. We will quantify and compare the direct and indirect effects of the changed climatic factors (such as cloudiness, radiation, temperature, etc.) by different aerosol concentrations on the ecosystem carbon cycle, water cycle and water use efficiency. In addition，we will explore the biophysical regulatory mechanisms of atmospheric aerosols on the forest ecosystem carbon-water coupling. Finally, we will establish the ecosystem model to simulate the carbon and water coupling processes driven by the atmospheric aerosol, which will be parameterized and verified by using multi-year observation data. We aimed at enriching basic theory of ecohydrology theory, improving the evaluation accuracy for forest ecosystem carbon sink function, and providing scientific bases for developing management strategy to strengthening the ecosystem services of forests.