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Correcting and validating moored oxygen time-series observations in the Gulf of Maine

机译：校正和验证缅因州海湾的停泊氧时系列观测

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The University of New Hampshire has been involved with an Open Ocean Aquaculture demonstration project for the last 10 years in the western Gulf of Maine. As part of an environmental monitoring program, a mooring has been deployed at the field site 10 km off the New Hampshire coast about 9 months each year. Since 2005, dissolved oxygen sensors have been deployed on the mooring. Oxygen was measured by Sea-Bird SBE-43 sensors powered and recorded by SBE-16 Plus SEACATs located ~22 m depth and ~2 m above the bottom. The sensors were calibrated and checked yearly by Sea-Bird. In-situ calibration of the moored oxygen sensors was also done with water samples and Winkler titrations about 6 times a year from 2005 to 2008. The difference between the moored and water sample oxygen concentrations showed a nearly linear drift with time. The drift rates during each of the years and for each sensor (at different depths) were not the same. As the SBE-43 sensors have no apparent zero drift, the drift was corrected by a time changing sensitivity which was applied to the data. The resulting time-series showed the dissolved oxygen variations with time over a year, and showed low values of dissolved oxygen in the deeper waters in late summer and fall. With the successful correction for the sensor drift, the climatology of the Western Gulf of Maine can be studied in more detail and related to the spring and fall plankton blooms, the biological cycles and health of the Gulf.
机译：新汉普郡大学在缅因州湾的过去10年中涉及一个开阔的海洋水产养殖示范项目。作为环境监测计划的一部分，每年9个月的新罕布什尔州海岸距离新罕布什尔州海岸10公里的野外网站。自2005年以来，停泊处已经部署了溶解的氧气传感器。通过Sea-Bird SBE-43传感器测量氧气，由SBE-16加上Seacats位于〜22米深度的Sea-16加上〜22米深度〜底部2米。通过海鸟每年校准传感器并检查。停泊的氧气传感器的原位校准也是在2005年至2008年的每年约6次的水样和Winkler滴定。停泊和水样氧浓度之间的差异显示了几乎线性漂移的时间。每年和每个传感器（不同深度）的漂移速率都不一样。随着SBE-43传感器没有明显的零漂移，随着应用于数据的时间改变的灵敏度，漂移校正了漂移。得到的时间系列显示溶解的氧气变化随着时间的推移，在夏季深水中较深水域显示出溶解氧的低值。随着传感器漂移的成功校正，缅因州西部海湾的气候学可以更详细地研究，与春季和秋季浮游生物，生物循环和海湾的健康有关。

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