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.

这是一个由国家科学基金会地球科学理事会（NSF/GEO）和联合王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的项目。该协议允许美国/英国提交一份联合提案，并由研究者拥有最大预算比例的机构进行同行评审。一旦成功地共同确定了一项奖励，每个机构就为预算的一部分和与其自己的调查人员和工作组成部分有关的调查人员提供资金。这项研究解决了活性卤素对大气氧化能力（反应性）的影响。将在百慕大的BIOS Tudor Hill海洋大气观测站开展测量活动，以测量活性气态卤素（溴、氯和碘）及其气溶胶相对应物。这项研究的结果将改善反应性卤素化学在大气化学传输模式中的过程水平表示，提高准确预测大气中臭氧等污染物浓度的能力。这项工作所支持的观测将包括预计最丰富的反应性气态溴、氯和碘物质（HCl、BrO、ClNO 2、IO等）及其气溶胶相对应物（Br-、Cl-、I-），气相物质来源于这些气溶胶相对应物。对于气相物种，将采用三种不同的观测技术（CIMS，LP-DOAS，TILDAS），允许比较一些关键活性卤素的测量，同时也扩大了测量卤素物种的套件。作为该项目的一部分，将把卤素化学的详细化学表示纳入全球测地系统化学模型。该项目将支持三名美国研究生和一名英国研究生。该奖项反映了NSF的法定使命，并通过使用基金会的智力价值和更广泛的影响审查标准进行评估，被认为值得支持。