New Particle Formation in the Marine Boundary Layer: The Frequency, Mechanism, and Impact on Cloud Condensation Nuclei

海洋边界层新粒子的形成：频率、机制及其对云凝结核的影响

• 批准号: 2147747
• 负责人: Jian Wang
• 金额: $ 45.78万
• 依托单位: Washington University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2022
• 资助国家: 美国
• 起止时间: 2022-05-01 至 2025-04-30
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2147747&HistoricalAwards=false
• 关键词: New; Particle; Formation; Marine; Boundary

This project combines existing observational data with updated model simulations to address current knowledge gaps regarding new particle formation, particularly new particles being formed in proximity to clouds in the marine boundary layer. This work provides a much-needed integration of various observational datasets with state-of-the-science simulations and has the potential to fill existing knowledge gaps and advance our understanding of how clouds are formed. Clouds over the ocean are particularly important with regard to solar radiation and the energy budget so research examining cloud processes over the ocean will enhance our understanding of our atmosphere and our climate.This project includes three primary tasks. The first task seeks to identify the conditions under which new particle formation (NPF) occurs and the main drivers of NPF within the marine boundary layer (MBL) via analysis of existing field measurements including airborne and surface (ground site and research cruise) observations. The observational datasets are pulled from field campaigns across the Atlantic and Pacific oceans. The second task seeks to investigate the mechanism behind MBL NPF via state-of-the-science simulations using the large eddy simulation (LES) formulation of the WRF-Chem model constrained by the field observations from the first task. Finally, the third task will run additional WRF-Chem simulations under representative conditions in order to quantify the impact of MBL NPF on cloud condensation nuclei (CCN) and cloud microphysics and the resultant regional impact on MBL clouds. This effort includes support and training for a postdoctoral researcher.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

该项目将现有的观察数据与更新的模型模拟相结合，以解决有关新粒子形成的当前知识差距，尤其是在海洋边界层中靠近云的新粒子。这项工作提供了各种观察数据集与最先进的模拟的急需集成，并有可能填补现有的知识差距，并促进我们对如何形成云的理解。在太阳辐射和能源预算方面，海洋上的云尤为重要，因此研究海洋上的云过程的研究将增强我们对气氛和气候的理解。这包括三个主要任务。第一项任务旨在通过分析包括机载和地面（地面和研究巡游）观察结果在内的现有田间测量值分析海洋边界层（MBL）内NPF的新颗粒形成（NPF）的条件。观察数据集从大西洋和太平洋的现场活动中获取。第二个任务旨在通过先进的仿真来研究MBL NPF背后的机制，该机制使用第一个任务的现场观察结果约束的WRF-CHEM模型的大型涡流模拟（LES）公式。最后，第三个任务将在代表性条件下运行其他WRF-CHEM模拟，以量化MBL NPF对云冷凝核（CCN）和云微物理学的影响以及所得的区域对MBL云的影响。这项工作包括对博士后研究人员的支持和培训。该奖项反映了NSF的法定任务，并被认为是值得通过基金会的知识分子和更广泛影响的评论标准来评估值得支持的。