Measurements of ozone-depleting substances at the Cape Verde Observatory

佛得角观测站消耗臭氧层物质的测量

• 批准号: 2885174
• 金额: --
• 依托单位: University of York
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2023
• 资助国家: 英国
• 起止时间: 2023 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2885174
• 关键词: Measurements; ozone; depleting; substances; Cape

This project will expand our atmospheric halocarbon GC-MS measurements at the Cape Verde Observatory (CVO) to include a wider range of established and emerging ozone depleting substances. The student will also collect new air and seawater VSLS chlorine measurements at Cape Verde to investigate and parametrise in situ ocean production. The student will test and harmonise column combinations with those used by other groups to allow comparison of relative retention times for new halocarbon species, establish calibration scales for compounds not previously measured at CVO via an intercomparison programme, and establish a program of monthly seawater sampling upwind of the CVO for measurements of CH2Cl2, CHCl3 and other, predominantly natural, VSLS by purge and trap GC-MS. Simultaneous analysis of CFC-11 concentrations in seawater will allow calculation of the excess CH2Cl2 and CHCl3 "saturation anomalies", required to assess whether in-situ oceanic production is occurring. These saturation anomalies will be analysed for patterns and trends that correlate with, for example, chlorophyl-A, coloured dissolved organic material and dissolved organic carbon abundances, to allow scale-up of these emissions to the tropical ocean. Thus, the project will determine patterns and trends in emerging anthropogenic ozone depleting substances and better constrain natural emissions of short-lived ozone depleting compounds not controlled under the Montreal Protocol.

该项目将扩大我们大气的卤代GC-MS测量值，即佛得角（CVO）（CVO），包括更广泛的已建立和新兴臭氧耗尽物质。该学生还将在Verde角收集新的空气和海水VSL氯测量值，以调查和参数原位海洋生产。 The student will test and harmonise column combinations with those used by other groups to allow comparison of relative retention times for new halocarbon species, establish calibration scales for compounds not previously measured at CVO via an intercomparison programme, and establish a program of monthly seawater sampling upwind of the CVO for measurements of CH2Cl2, CHCl3 and other, predominantly natural, VSLS by purge and trap GC-MS.同时对海水中CFC-11浓度的分析将允许计算过量的CH2CL2和CHCL3“饱和异常”，以评估是否发生了原位海洋生产。这些饱和异常将分析与氯磷-a，有色溶解的有机材料和溶解有机碳丰度相关的模式和趋势，以使这些排放量扩大到热带海洋。因此，该项目将确定新兴的人为臭氧耗尽物质的模式和趋势，并更好地限制蒙特利尔协议未控制的短寿命臭氧耗竭化合物的自然排放。