A new method for continuous measurements of oceanic and atmospheric N2O, CO and CO2: performance of off-axis integrated cavity output spectroscopy (OA-ICOS) coupled to non-dispersive infrared detection (NDIR)
A new method for continuous measurements of oceanic and atmospheric N2O, CO and CO2: performance of off-axis integrated cavity output spectroscopy (OA-ICOS) coupled to non-dispersive infrared detection (NDIR)
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DOI：
10.5194/os-9-1071-2013
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发表时间：
2013-01-01
期刊：
影响因子：
3.2
通讯作者：
Bange, H. W.
中科院分区：
文献类型：
--
作者：
Arevalo-Martinez, D. L.;Beyer, M.;Bange, H. W.
描述了一种用于连续、高分辨率海洋和大气测量 N2O、CO 和 CO2 的新系统。该系统基于离轴集成腔输出光谱仪 (OA-ICOS) 和非色散红外分析仪 (NDIR)，两者均与 Weiss 型平衡器耦合。通过测试其精度、准确度、长期稳定性、线性度和响应时间来评估组合装置的性能。此外，该装置在赤道大西洋的两次海洋学活动中进行了测试，以探索其在自愿观测船（VOS）上自主部署的潜力。与之前研究中使用的类似室设计的响应时间相比，N2O（2.5 分钟）和 CO（45 分钟）的平衡器响应时间得到了改善。 N2O 和 CO 的最佳积分时间分别为 2 分钟和 4 分钟，检测限也较低，这证明了 OA-ICOS 分析仪的高稳定性。
A new system for continuous, highly resolved oceanic and atmospheric measurements of N2O, CO and CO2 is described. The system is based upon off-axis integrated cavity output spectroscopy (OA-ICOS) and a non-dispersive infrared analyzer (NDIR), both coupled to a Weiss-type equilibrator. Performance of the combined setup was evaluated by testing its precision, accuracy, long-term stability, linearity and response time. Furthermore, the setup was tested during two oceanographic campaigns in the equatorial Atlantic Ocean in order to explore its potential for autonomous deployment onboard voluntary observing ships (VOS). Improved equilibrator response times for N2O (2.5 min) and CO (45 min) were achieved in comparison to response times from similar chamber designs used by previous studies. High stability of the OA-ICOS analyzer was demonstrated by low optimal integration times of 2 and 4 min for N2O and CO respectively, as well as detection limits of