Measurements of volcanic Sulfur and Carbon Emissions at high temporal Resolution

高时间分辨率测量火山硫和碳排放

• 批准号: 386938914
• 负责人: Professor Dr. Ulrich Platt
• 金额: --
• 依托单位: Institut für Umweltphysik
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2017
• 资助国家: 德国
• 起止时间: 2016-12-31 至 2017-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/386938914?language=en
• 关键词: Measurements; volcanic; Sulfur; Carbon; Emissions

This is a request for travel funds for a trip from Germany to Argentina and the Copahue and Peteroa volcanoes there, where we plan measurements of SO2 with a new type of instrument together with researchers from Argentina. Combined with in-situ CO2 measurements we expect a data set of CO2/SO2 ratios of unprecedented accuracy and time resolution.Although remote sensing of SO2 has become well established among volcanologists over the last decades, ground based and airborne in-situ-measurements remain essential to obtain comple¬mentary information. Nowadays in-situ measurements of SO2 are often performed by electrochemical sensors, which suffer from several disadvantages including (1) relatively long response times (ca. 20 s and more), (2) interferences to several other reactive gas species present in volcanic plumes (which are hard to quantify or even unknown), (3) the need for frequent calibration. We overcome these problems with a newly developed optical in-situ SO2-sensor prototype, relying on the principle of non-dispersive UV-absorption (PITSA, Portable in-situ Sulfurdioxide Analyser). Its cost-effective application for measurements of SO2 has become possible by the recent developments of UV-LEDs. The sample air is pumped through a glass cell, where it is exposed to the light beam of an UV-LED (ca. 290nm), in which essentially only SO2 shows absorption features. Therefore the reduction of the radiation intensity passing the cell becomes an indicator for the sample air's SO2-content. The PITSA device is combined with a commercial CO2 sensor thus allowing SO2 and CO2 measurements at 0.1 ppm and 1 ppm accuracy, respectively. This opens up new possibilities in volcanological applications.

这是从德国到阿根廷和那里的Copahue和Peteroa火山的旅行资金的请求，我们在那里计划与阿根廷的研究人员一起计划使用新型乐器进行SO2的测量。结合原位二氧化碳测量结果，我们期望有前所未有的准确性和时间分辨率的二氧化碳/SO2比率数据集。尽管SO2的遥远灵敏度在过去几十年中已经在火山学家中建立了良好的远程敏感性，但基于地面和空中的空气中，在获得完整的信息中仍然是必不可少的。如今，SO2的原位测量通常由电化学传感器进行，这些传感器患有多种缺点，包括（1）相对较长的响应时间（约20 s及以上），（2）与火山羽流中存在的其他几种反应性气体的相互作用（很难量化甚至很难量化，甚至很难量化，甚至需要进行频率校准。我们依靠非分散性紫外线吸收原理（Pitsa，Portable，Portable Portable-portable situ sutu sulfurdioxide Analyszer）来克服这些问题。紫外线领导的最新发展已成为可能的SO2测量的成本效益。样品空气通过玻璃单元将其暴露于紫外线的光束（约290nm）的光束，其中本质上只有SO2显示出滥用功能。因此，通过细胞的辐射强度的降低成为样品空气SO2含量的指标。 The PITSA device is combined with a commercial CO2 sensor thus allowing SO2 and CO2 measurements at 0.1 ppm and 1 ppm accurate, respectively.这为火山学应用程序打开了新的可能性。