Collaborative Research: NSFGEO-NERC--Coupled Tropospheric Reactive Halogen Chemistry in the Subtropical Marine Boundary Layer

合作研究：NSFGEO-NERC——副热带海洋边界层中的对流层活性卤素化学耦合

• 批准号: 2109323
• 负责人: Becky Alexander
• 金额: $ 90万
• 依托单位: University of Washington
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2021
• 资助国家: 美国
• 起止时间: 2021-06-01 至 2024-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2109323&HistoricalAwards=false
• 关键词: Collaborative; Research; NSFGEO; NERC; Coupled

This is a project that is jointly funded by the National Science Foundation’s Directorate of Geosciences (NSF/GEO) and the National Environment Research Council (UKRI/NERC) of the United Kingdom (UK) via the NSF/GEO-NERC Lead Agency Agreement. This Agreement allows a single joint US/UK proposal to be submitted and peer-reviewed by the Agency whose investigator has the largest proportion of the budget. Upon successful joint determination of an award, each Agency funds the proportion of the budget and the investigators associated with its own investigators and component of the work.This research addresses the influence of reactive halogens on the oxidation capacity (the reactivity) of the atmosphere. A measurement campaign will be conducted at the BIOS Tudor Hill Marine Atmospheric Observatory in Bermuda to measure reactive gaseous halogens (bromine, chlorine, and iodine species) and their aerosol-phase counterparts. The results of this research will improve the process level representation of reactive halogen chemistry in atmospheric chemical transport models, increasing the ability to accurately predict the concentrations of pollutants such as ozone in the atmosphere.The observations supported by this effort will include what are expected to be the most abundant reactive gaseous bromine, chlorine, and iodine species (HCl, BrO, ClNO2, IO, among several others) and their aerosol-phase counterparts (Br-, Cl-, I-) from which the gas-phase species are derived. For gas-phase species, three different observational techniques (CIMS, LP-DOAS, TILDAS) will be employed, allowing for comparison of the measurements of some key reactive halogens while also expanding the suite of measured halogen species. A chemically detailed representation of the halogen chemistry will be included into the GEOS-Chem model as part of this project. This project will support three U.S. graduate students and one U.K. graduate student, providing these students with experience in field work, global modeling, and international collaboration.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.

该项目由美国国家科学基金会地球科学理事会 (NSF/GEO) 和英国国家环境研究理事会 (UKRI/NERC) 通过 NSF/GEO-NERC 牵头机构协议共同资助。该协议允许美国/英国联合提案由其研究人员拥有最大预算比例的机构提交并进行同行评审。在成功联合确定资助后，每个机构将资助该比例的预算和相关研究人员。有自己的调查员这项研究探讨了活性卤素对大气氧化能力（反应性）的影响。一项测量活动将在百慕大 BIOS Tudor Hill 海洋大气观测站进行，以测量活性气体卤素（溴、这项研究的结果将改善大气化学传输模型中反应性卤素化学的过程水平表示，提高准确计算的能力。预测大气中臭氧等污染物的浓度。这项工作支持的观测结果将包括预计最丰富的反应性气态溴、氯和碘物质（HCl、BrO、ClNO2、IO 等）以及气相物质的气溶胶相部分（Br-、Cl-、I-） 对于气相物质，采用三种不同的观测技术（CIMS、LP-DOAS、将采用 TILDAS），以便对一些关键活性卤素的测量进行比较，同时扩展测量的卤素种类套件，作为该项目的一部分，卤素化学的化学详细表示将包含在 GEOS-Chem 模型中。该项目将支持三名美国研究生和一名英国研究生，为这些学生提供实地工作、全球建模和国际合作的经验。该奖项反映了 NSF 的法定使命，经评估认为值得支持利用基金会的智力优势和更广泛的影响审查标准。