CO2 Sensor System for Long-Term Ocean Monitoring

用于长期海洋监测的二氧化碳传感器系统

• 批准号: 9306423
• 负责人: Timothy Tiernan
• 金额: $ 29.49万
• 依托单位: TPL, Inc.
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-02-01 至 1996-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9306423&HistoricalAwards=false
• 关键词: CO2; Sensor; System; Long; Term

Current projections indicate that the partial pressure of CO2 in earth's atmosphere will be double the level of the preindustrial era somewhere between the years 2036 and 2060 resulting in a 20C - 30C increase in global temperature. There is a large uncertainty concerning the quantitative ability of the oceans to absorb anthropogenic CO2 and the influence the uptake will have on global climate. A small, low power, low cost, analytical instrument is proposed with the sensitivity, durability, and long term stability to make continuous measurements of the CO2 concentration above and below the oceanic surface for periods of one year or longer without calibration or repair. During Phase I, prototype CO2 sensors were fabricated and tested with the capability of responding to 100 x 10-12g of CO2. In laboratory tests, the prototype sensor was able to measure CO2 levels to 100 ppm in the presence of oxygen and nitrogen gases. Power consumption was measured at 250 uW per sensor. During Phase II, high performance sensors will be incorporated into a prototype CO2 monitoring instrument system suitable for deployment with existing ocean monitoring and telemetry systems. Performance of the prototype will be quantified in the laboratory and ocean environment.

目前的预测表明，在2036年至2060年之间，地球大气中二氧化碳的部分压力将是前工业化时代水平的两倍，从而导致全球气温上升20摄氏度至30摄氏度。海洋吸收人为二氧化碳的数量能力以及这种吸收将对全球气候产生的影响存在很大的不确定性。提出了一种体积小、功耗低、成本低、灵敏度高、经久耐用、长期稳定的分析仪器，可以对海面以上或以下的二氧化碳浓度进行一年或更长时间的连续测量，无需校准或维修。在第一阶段，制作了原型二氧化碳传感器并进行了测试，其响应能力为100×10-12g二氧化碳。在实验室测试中，原型传感器能够在氧气和氮气存在的情况下测量到100ppm的二氧化碳水平。每个传感器的功耗测量为250 UW。在第二阶段，高性能传感器将被纳入适合与现有海洋监测和遥测系统一起部署的二氧化碳监测仪器原型系统。样机的性能将在实验室和海洋环境中进行量化。