Collaborative Research: Understanding the Drivers and Air-quality Implications of Marine Gas-phase Emissions in Urban Coastal Regions

该项目包括实地工作、实验室分析和建模相结合，以提高对城市和沿海海洋交界处人类与自然系统之间复杂相互作用的理解。这项研究的重点是量化和描述控制加州南部沿海城市地区海洋痕量气体排放的因素，已知该地点受到径流和人为排放的影响。这项研究收集的数据将用于估计这些微量气体通量对全球气候和当地空气质量的当前和未来影响。这项工作有三个主要目的：(1)通过受控的中层实验和现场测量活动，表征控制沿海次生海洋气溶胶(SMA)前体的环境驱动因素和人为影响；(2)将上述特征的气相排放整合到最新的沿海排放清单中；(3)模拟当前和未来气候情景下修正海洋排放的影响。将利用全球和区域大气模拟来探索通过实地活动和实验室测量确定的化学形态、时间和温度依赖性的潜在影响。这项工作将为在很大程度上受到限制的人类-生物系统提供新的数据集，并导致随后的排放清单和区域和全球模拟的改进，以增加对大气中沿海次生海洋气溶胶(SMA)形成的理解。该项目包括对一名博士后学者、几名研究生的支持，以及公民科学参与的机会。该奖项反映了NSF的法定使命，并通过使用基金会的智力优势和更广泛的影响审查标准进行评估，被认为值得支持。

This project includes a combination of field work, laboratory analysis, and modeling to improve the understanding of the complex interactions between human and natural systems at the interface of urban cities and coastal oceans. This research focuses on quantifying and characterizing factors controlling the marine emissions of trace gases in an urban coastal southern California location known to be impacted by run-off and anthropogenic emissions. The data collected in this study will be used to estimate the current and future influences of these trace gas fluxes on global climate and local air quality.This work has three primary aims: (1) Characterize the environmental drivers and anthropogenic influences controlling coastal secondary marine aerosol (SMA) precursors through controlled mesocosm experiments and in-situ measurement campaigns; (2) Integrate the gas-phase emissions characterized above into updated online coastal emissions inventories; and (3) Model impacts of the modified ocean emissions under current and future climate scenarios. The potential impacts of chemical speciation, timing, and temperature dependence identified through the field campaign and laboratory measurements will be explored using both global and regional atmospheric simulations. This effort will provide new datasets for a largely under-constrained anthropogenic-biogenic system, and lead to a subsequent improvement of emission inventories and regional and global modeling to increase the understanding of the formation of coastal secondary marine aerosols (SMA) in the atmosphere.This project includes support for a postdoctoral scholar, several graduate students, and opportunities for the involvement of citizen science.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.