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Protocols for a Delayed-Mode Quality Control
Sensors ( IF 3.9 ) Pub Date : 2021-09-16 , DOI: 10.3390/s21186217
Quentin Jutard 1 , Emanuele Organelli 2 , Nathan Briggs 3 , Xiaogang Xing 4 , Catherine Schmechtig 1 , Emmanuel Boss 5 , Antoine Poteau 6 , Edouard Leymarie 6 , Marin Cornec 6 , Fabrizio D'Ortenzio 6 , Hervé Claustre 6
Affiliation  

Measuring the underwater light field is a key mission of the international Biogeochemical-Argo program. Since 2012, 0–250 dbar profiles of downwelling irradiance at 380, 412 and 490 nm besides photosynthetically available radiation (PAR) have been acquired across the globe every 1 to 10 days. The resulting unprecedented amount of radiometric data has been previously quality-controlled for real-time distribution and ocean optics applications, yet some issues affecting the accuracy of measurements at depth have been identified such as changes in sensor dark responsiveness to ambient temperature, with time and according to the material used to build the instrument components. Here, we propose a quality-control procedure to solve these sensor issues to make Argo radiometry data available for delayed-mode distribution, with associated error estimation. The presented protocol requires the acquisition of ancillary radiometric measurements at the 1000 dbar parking depth and night-time profiles. A test on >10000 profiles from across the world revealed a quality-control success rate >90% for each band. The procedure shows similar performance in re-qualifying low radiometry values across diverse oceanic regions. We finally recommend, for future deployments, acquiring daily 1000 dbar measurements and one night profile per year, preferably during moonless nights and when the temperature range between the surface and 1000 dbar is the largest.

中文翻译:

延迟模式质量控制协议

测量水下光场是国际生物地球化学-Argo 计划的一项关键任务。自 2012 年以来,除光合有效辐射 (PAR) 外,每 1 至 10 天在全球范围内获得了 0-250 dbar 的 380、412 和 490 nm 下流辐照度分布图。由此产生的空前数量的辐射测量数据以前已经针对实时分布和海洋光学应用进行了质量控制,但已经确定了一些影响深度测量精度的问题,例如传感器对环境温度的暗响应随时间和时间的变化。根据用于构建仪器组件的材料。在这里,我们提出了一个质量控制程序来解决这些传感器问题,使 Argo 辐射测量数据可用于延迟模式分布,并具有相关的误差估计。所提出的协议需要在 1000 dbar 停车深度和夜间剖面上获取辅助辐射测量。对来自世界各地的 >10000 个配置文件的测试显示,每个频段的质量控制成功率 >90%。该程序在重新鉴定不同海洋区域的低辐射值方面表现出类似的性能。我们最后建议,对于未来的部署,每天获取 1000 dbar 测量值和每年一个夜间剖面图,最好是在无月之夜以及地表和 1000 dbar 之间的温度范围最大时。该程序在重新鉴定不同海洋区域的低辐射值方面表现出类似的性能。我们最后建议,对于未来的部署,每天获取 1000 dbar 测量值和每年一个夜间剖面图,最好是在无月之夜以及地表和 1000 dbar 之间的温度范围最大时。该程序在重新鉴定不同海洋区域的低辐射值方面表现出类似的性能。我们最后建议,对于未来的部署,每天获取 1000 dbar 测量值和每年一个夜间剖面图,最好是在无月之夜以及地表和 1000 dbar 之间的温度范围最大时。
更新日期:2021-09-16
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