近年来我国区域臭氧(O3)污染态势严峻。在人为源排放有效控制的背景下，生物源挥发性有机物(BVOCs)对O3生成的贡献日益突出，然而当前BVOCs排放的准确估算及其环境效应评估仍然具有很大不确定性，其中忽略大气氮沉降的影响是其不确定的重要来源之一。针对BVOCs排放估算考虑大气氮沉降影响不足的问题，本项目拟开展环境控制植物生长室实验，揭示大气氮沉降对BVOCs排放的影响，并建立树种尺度的BVOCs-大气氮沉降响应关系参数化方案；进一步构建升尺度模型，推算区域尺度BVOCs排放对大气氮沉降的响应，实现WRF/Chem-MEGAN数值模式BVOCs排放-大气氮沉降的双向反馈模拟；最后通过开展敏感性实验，阐明中国BVOCs排放对近地面O3分布格局的影响。项目有望提升BVOCs排放和大气氮沉降动态交换过程的表征能力，深化BVOCs排放对O3生成的认识，为区域O3污染防治和空气质量改善提供科学依据。

In recent years, regional ozone(O3) pollution is becoming more and more severe over China. With the effective control of anthropogenic emissions, the contribution of biogenic volatile organic compounds (BVOCs) to O3 formation is increasingly prominent. However, high uncertainties of the accurate estimation of natural emissions and the assessment of their environmental effects are still existed, in which, the neglect of the effects of atmospheric nitrogen deposition is one of the key uncertainty sources. In view of the insufficient consideration of the impacts of atmospheric nitrogen deposition on the simulation of BVOCs emissions, environmentally controlled plant growth chamber experiment is conducted to reveal the potential influences of atmospheric nitrogen deposition on BVOCs emissions over China, further to establish a parameterization scheme in the response relationship between BVOCs emissions and atmospheric nitrogen deposition. Secondly, upscaling model is developed to extrapolate the response of BVOCs emissions to atmospheric nitrogen deposition at the regional scale, and the two-way feedback between BVOCs emissions and atmospheric nitrogen deposition is achieved. Thirdly, the influence of BVOCs emissions on the distribution pattern of surface O3 over China is explored through sensitivity studies. This study is expected to enhance the characterization capability of the dynamic exchange processes between BVOCs emissions and atmospheric nitrogen deposition, and to deepen the understanding of the effects of BVOCs emissions on O3 formation, which could potentially provide scientific evidences for the prevention and control of regional O3 pollution, and the improvement of air quality.