Development of a Greenhouse Gas Ocean-Atmosphere Flux Sensor with MEMS-based Photoacoustic Technology

基于 MEMS 光声技术的温室气体海洋-大气通量传感器的开发

• 批准号: 0852510
• 负责人: Eugene Terray
• 金额: $ 95.75万
• 依托单位: Woods Hole Oceanographic Institution
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-06-01 至 2015-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0852510&HistoricalAwards=false
• 关键词: Development; Greenhouse; Gas; Ocean; Atmosphere

Accurate measurements of the atmosphere?ocean fluxes of trace gases are important to an improved understanding of the cycling of climatically relevant gases. The direct eddy correlation (EC) method, which is considered to be the benchmark for accurate determination of air?sea fluxes of trace gases, relies on high? frequency measurements of the fluctuations of vertical wind velocity and gas concentration, and requires fast response sensors in combination with high sensitivity. These twin requirements have precluded oceanographic use of the EC technique for many species of interest, and direct measurements have been limited mainly to carbon dioxide at relatively high flux levels. The PI?s request funding to develop a fast, highly sensitive, gas concentration sensor, and to integrate it with a sonic anemometer, motion sensing, and data acquisition into an EC flux package suitable for operation from buoys and other platforms, such as ships. Our gas sensor is based on infrared (IR) absorption, but utilizes a novel, highly sensitive, photoacoustic detector. The PI?s expect that this combination will result in an improvement in sensitivity of several orders of magnitude over the IR absorption sensors that are currently in oceanographic use. This proposal was submitted under the US?Ireland R&D Partnership Program by E. Terray (PI-US), WHOI; B. Ward (Partner-IE), National University of Ireland, Galway, Ireland; and N. Mitchell (Partner-NI), Queens University Belfast, Northern Ireland (NI).

对大气层的精确测量？微量气体的海洋通量对于更好地了解与气候有关的气体的循环十分重要。直接涡流相关（EC）方法，这被认为是准确测定空气的基准？微量气体的海洋通量，依赖于高？垂直风速和气体浓度的波动的频率测量，并需要快速响应的传感器结合高灵敏度。这些双重要求排除了对许多感兴趣的物种使用EC技术的海洋学，直接测量主要限于相对高通量水平的二氧化碳。私家侦探？该公司要求资助开发一种快速、高灵敏度的气体浓度传感器，并将其与声波风速计、运动传感和数据采集集成到一个EC通量包中，适用于浮标和其他平台（如船舶）的操作。我们的气体传感器是基于红外（IR）吸收，但利用一种新型的，高灵敏度，光声检测器。私家侦探？我们预计，这种组合将导致提高几个数量级的灵敏度比红外吸收传感器，目前在海洋学使用。该提案是根据美国？E.爱尔兰研发伙伴计划。Terray（PI-US），WHOI; B.沃德（合作伙伴-IE），爱尔兰国立大学，高威，爱尔兰;和N。Mitchell（NI合伙人），爱尔兰北方贝尔法斯特皇后大学。