Collaborative Research: Atmospheric Nucleation of Complex Mixtures Emitted from Marine Planktonic Communities

合作研究：海洋浮游生物群落排放的复杂混合物在大气中成核

• 批准号: 2330787
• 负责人: Coty Jen
• 金额: $ 93.23万
• 依托单位: Carnegie-Mellon University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2024
• 资助国家: 美国
• 起止时间: 2024-02-15 至 2027-01-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2330787&HistoricalAwards=false
• 关键词: Collaborative; Research; Atmospheric; Nucleation; Complex

This project is focused on investigating how the emissions from various marine planktonic communities lead to particle nucleation in the atmosphere and how these emissions might evolve with a changing environment. Particle nucleation provides a substantial fraction of the seed particles for forming marine clouds that reflect incoming solar radiation while simultaneously obscuring radiation-absorbing oceans. Since the formation and rate at which particles nucleate influence the brightness and lifetimes of clouds, quantifying marine nucleation rates is important for accurately predicting the role of clouds in climate change.The objectives of this project are to: (1) Verify that the Nucleation Potential Model can quantify the nucleation potential of laboratory-generated complex mixtures; (2) Measure the nucleation reactions, nucleation potentials, and emission profiles produced from tank-grown marine phytoplankton during various stages of growth; (3) Predict the seasonal and spatial variation in emission profiles, nucleation reactions, and nucleation potentials from natural marine planktonic communities collected from Gulf of Maine; and (4) Evaluate spring and late summer/fall marine emissions and atmospheric nucleation at the Gulf of Maine and compare with those observed in Objective 3.The ultimate impact of this research is to dramatically expand nucleation measurements in difficult-to-access regions worldwide and provide a computationally simple method for predicting nucleation rates in diverse environments and points in time. In the future, climate change may cause regions of the oceans that were not previously significant sources of aerosol particles to play more critical roles in determining Earth's radiative budget and climate.The PIs plan to work with two high school science teachers from underfunded neighborhoods of Pittsburgh, PA to develop a student-centered, atmospheric chemistry and climate curriculum that can be incorporated into a semester-long chemistry class. The final objective of the project is to incorporate the experimental design and data analysis of measured phytoplankton emissions into the atmospheric chemistry module implemented at two local high schools.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.

该项目的重点是研究各种海洋浮游社区的排放如何导致大气中的粒子成核以及这些排放可能如何随着环境而变化而发展。粒子成核为形成反映传入太阳辐射的海洋云的种子颗粒提供了很大一部分，同时掩盖了吸收辐射的海洋。由于颗粒成核会影响云的亮度和寿命的形成和速率，量化海洋成核率对于准确预测云在气候变化中的作用至关重要。该项目的目标是：（1）验证核定能力模型是否可以量化实验室生成的复杂混合物的成核潜在的核能潜力； （2）测量在生长的各个阶段，由储罐生长的海洋浮游植物产生的成核反应，成核电位和发射谱； （3）预测从缅因州海湾收集的天然海洋浮游生物群落中排放曲线，成核反应和成核电位的季节性和空间变化； （4）评估缅因州湾的春季和夏末/秋季海洋排放和大气成核与目标3中观察到的春季/秋季大气成核。这项研究的最终影响是显着扩大全球难以访问区域的成核测量结果，并为在各种环境中提供了一种计算简单的方法，以预测各种环境中的成核速率。将来，气候变化可能会导致海洋颗粒的重要来源，在确定地球的辐射预算和气候方面发挥了更关键的作用。PIS计划与来自宾夕法尼亚州匹兹堡不足的高中科学教师一起工作，宾夕法尼亚州匹兹堡不足的社区，可以开发以学生为中心的，大气化的化学和气候的化学，可以将其融合为一项consection contrimate contriment contriment contriment comments commented comments nemstement congement congement congement congement congement congement congement congement congement。该项目的最终目标是将测量的浮游植物排放的实验设计和数据分析纳入在两所当地高中实施的大气化学模块中。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优点和更广泛影响的审查标准来通过评估来支持的。