Photochemical Modeling in Support of CONTRAST (CONvective TRansport of Active Species in the Tropics)

支持 CONTRAST 的光化学模型（热带地区活性物质的对流传输）

• 批准号: 1261657
• 负责人: Ross Salawitch
• 金额: $ 40万
• 依托单位: University of Maryland, College Park
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-09-01 至 2018-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1261657&HistoricalAwards=false
• 关键词: Photochemical; Modeling; Support; CONTRAST; CONvective

This project is an important part of the Convective Transport of Active Species in the Tropics (CONTRAST) experiment scheduled for January and February 2014, with NSF/NCAR GV flights based out of the island of Guam. This effort includes flight planning and photochemical modeling to provide near real time interpretation of data during the campaign, and post-mission modeling and data interpretation afterward. CONTRAST is designed to measure the chemistry and transport of reactive chemical species into the tropical Tropopause Transition Layer (TTL) over the Western Pacific warm pool area. The sources, chemistry, and transport of trace gases and their degradation products into the lower stratosphere in this region during the boreal winter season can substantially impact the chemistry of the lower stratosphere. The CONTRAST mission is organized in collaboration with two partner projects: ATTREX (the Airborne Tropical Tropopause Experiment--a NASA project utilizing the high altitude Global Hawk (GH), and CAST (Coordinated Airborne Studies of the Tropics)--a project sponsored by the British National Environment Research Council using a BAe-146 aircraft. The research objectives of CONTRAST are to: (1) Characterize the chemical composition at the level of convective outflow over the Western Pacific during the deep convective season; (2) Evaluate the budget of organic and inorganic bromine and iodine in the TTL; and (3) Investigate transport pathways from the oceanic surface to the tropopause. The results of this effort will increase understanding of halogen budgets and impacts on stratospheric ozone depletion. It will also improve the development of process-oriented chemistry/climate models and their validation.

该项目是计划于2014年1月和2月进行的热带活跃物种对流输送实验的重要组成部分，NSF/NCAR GV航班以关岛为基地。这项工作包括飞行计划和光化学建模，以便在活动期间提供接近真实的时间的数据解释，以及任务后的建模和数据解释。CORST的目的是测量化学和运输的活性化学物质进入热带对流层顶过渡层（TTL）在西太平洋暖池区。在北半球冬季，痕量气体及其降解产物的来源、化学性质和向该区域平流层下部的输送可对平流层下部的化学性质产生重大影响。热带对流层顶飞行使命是与两个伙伴项目合作组织的：ATTREX（热带对流层顶空中实验-美国航天局利用高空全球鹰的一个项目）和CAST（热带地区协调空中研究）-英国国家环境研究理事会赞助的一个项目，使用的是一架BAe-146飞机。该项目的研究目标是：（1）确定深对流季节西太平洋对流流出层的化学成分特征;（2）评价TTL中有机和无机溴和碘的收支;（3）调查从洋面到对流层顶的输送路径。这一努力的结果将增进对卤素收支及其对平流层臭氧消耗的影响的了解。它还将改进面向过程的化学/气候模型的开发及其验证。