In Situ Oxygen Sensor Calibration

原位氧传感器校准

• 批准号: 0850286
• 负责人: Steven Emerson
• 金额: $ 54.28万
• 依托单位: University of Washington
• 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: 2009-06-15 至 2013-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0850286&HistoricalAwards=false
• 关键词: Situ; Oxygen; Sensor; Calibration

"This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5)."The cycles of organic carbon and oxygen are linked by the stoichiometry of photosynthesis and respiration, the mass balance of oxygen in the upper ocean is an important tracer for determining the marine ?biological carbon pump?. The utility of this method has been demonstrated repeatedly at ocean time-series sites by monthly shipboard measurements of oxygen and inert gases. Recently it has been shown that it is possible to determine the net biological oxygen production using in situ sensors that measure oxygen and total dissolved gas pressure remotely on moorings. This approach is very sensitive to accurate O2 measurements that are presently possible only if oxygen sensors can be calibrated several times during the year, because they drift after several months in the euphotic zone because of biofouling. The only thing preventing oceanographers from using present and future open-ocean surface moorings to derive a global coverage of the net annual biological oxygen production is the change in accuracy of oxygen sensors over time. The PI?s request funding to develop a method of calibrating oxygen sensors in situ by periodically exposing the oxygen sensor deployed at several meters depth in the ocean to the atmosphere. Temperature and atmospheric pressure will be measured along with the atmospheric pO2 during the calibrations.Broader ImpactsThis work will foster international cooperation with Aanderaa scientists, and likely spur improvements in data processing and calibration approaches for these sensors on many types of platforms. The value of mooring data sets will be increased, and understanding gained on the marine biological pump. A student will be trained by in an area of chemical oceanography that is certain to need future leaders. If successful, moorings can be outfitted with the design, allowing carbon export to be estimated in many parts of the ocean. Further, if the technology can be applied to drifters, the accuracy of O2 measurements can be greatly increased worldwide.

“该奖项是根据2009年美国复苏和再投资法案（公法111-5）资助的。“有机碳和氧的循环是由光合作用和呼吸作用的化学计量联系在一起的，海洋上层的氧的质量平衡是确定海洋？生物碳泵？这种方法的实用性已在海洋时间序列站点通过每月船上氧气和惰性气体测量反复得到证明。最近，它已被证明，它是可能的，以确定净生物氧生产使用原位传感器，测量氧气和总溶解气体压力远程系泊。这种方法对精确的O2测量非常敏感，目前只有在氧传感器可以在一年中校准几次的情况下才有可能，因为它们在透光层中几个月后会由于生物污垢而漂移。唯一阻止海洋学家使用现在和未来的开放海洋表面系泊来获得全球范围内的净年度生物氧生产的是氧传感器的准确性随时间的变化。私家侦探？2008年，美国申请资助开发一种方法，通过定期将部署在海洋数米深处的氧传感器暴露在大气中，就地校准氧传感器。温度和大气压力将被测量沿着随着大气pO 2在校准过程中。更广泛的影响这项工作将促进与Aanderaa科学家的国际合作，并可能刺激这些传感器在许多类型的平台上的数据处理和校准方法的改进。将增加系泊数据集的价值，并获得对海洋生物泵的了解。一名学生将在化学海洋学领域接受培训，这一领域肯定需要未来的领导者。如果成功的话，可以用这种设计来装备系泊设备，从而可以估计海洋许多地方的碳输出。此外，如果该技术可以应用于漂流者，则可以在全球范围内大大提高O2测量的准确性。