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首页> 外文期刊>Atmospheric Measurement Techniques >Continuous methane concentration measurements at the Greenland ice sheet–atmosphere interface using a low-cost, low-power metal oxide sensor system
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Continuous methane concentration measurements at the Greenland ice sheet–atmosphere interface using a low-cost, low-power metal oxide sensor system

机译：使用低成本低功耗金属氧化物传感器系统在格陵兰冰块界面的连续甲烷浓度测量

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摘要

In this paper, the performance of a low-cost and low-power methane (CH4) sensing system prototype based on a metal oxide sensor (MOS) sensitive to CH4 is tested in a natural CH4-emitting environment at the Greenland ice sheet (GrIS). We investigate if the MOS could be used as a supplementary measurement technique for monitoring CH4 emissions from the GrIS with the scope of setting up a CH4 monitoring network along the GrIS. The performance of the MOS is evaluated on the basis of simultaneous measurements using a cavity ring-down spectroscopy (CRDS)?reference instrument for CH4 over a field calibration period of approximately 100 h. Results from the field calibration period show that CH4 concentrations measured with the MOS are in very good agreement with the reference CRDS. The absolute concentration difference between the MOS and the CRDS reference values within the measured concentration range of approximately 2–100 ppm CH4 was generally lower than 5 ppm CH4, while the relative concentration deviations between the MOS and the CRDS?were?generally below 10 %. The calculated root-mean-square error (RMSE) for the entire field calibration period was 1.69 ppm (n=37?140). The results confirm that low-cost and low-power MOSs can be effectively used for atmospheric CH4 measurements under stable water vapor?conditions.?The primary scientific importance of the study is that it provides a clear example of how the application of low-cost technology can enhance our future understanding on the climatic feedbacks from the cryosphere to the atmosphere.
机译：本文在格陵兰冰板的天然CH4发射环境中测试了基于对CH4敏感的金属氧化物传感器（MOS）的低成本和低功率甲烷（CH4）感测系统原型的性能（GRIS ）。我们调查MOS可以用作用于监测来自GRIS的CH4排放的补充测量技术，以沿GRIS设置CH4监测网络的范围。基于使用腔斜波光谱（CRD）的同时测量来评估MOS的性能吗？CH4的参考仪器在大约100小时的场校准周期上。现场校准周期的结果表明，与MOS测量的CH4浓度与参考CRD非常好。测量浓度范围内的MOS和CRD参考值之间的绝对浓度差异通常低于5ppm CH4，而MOS和CRD之间的相对浓度偏差是？通常低于10％ 。整个场校准周期的计算的根均方误差（RMSE）为1.69 ppm（n = 37？140）。结果证实，低成本和低功耗的苔藓可以有效地用于稳定的水蒸气下的大气CH4测量？条件。？该研究的主要科学重要性是提供了一个明确的举例的应用程序如何应用低成本技术可以增强我们对冰雪圈到气氛的气候反馈的认识。

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