研究报告
刘云松,周凌晞,臧昆鹏,程巳阳.光腔衰荡光谱法走航连续观测海表大气中氧化亚氮[J].环境科学学报,2018,38(9):3482-3487
光腔衰荡光谱法走航连续观测海表大气中氧化亚氮
- Continuous measurement of atmospheric nitrous oxide by cavity ring-down spectroscopy technique over the China Seas
- 基金项目：国家重点研发计划项目（No.2016YFA0601304）；中美国际科技合作项目（No.2015DFG21960）；中国气象科学研究院科技发展基金（No.2018KJ016）
- 作者
- 单位
- 刘云松
- 中国气象科学研究院, 北京 100081
- 周凌晞
- 中国气象科学研究院, 北京 100081
- 臧昆鹏
- 1. 中国气象科学研究院, 北京 100081;2. 国家海洋环境监测中心, 国家海洋局近岸海域生态环境重点实验室, 大连 116023
- 程巳阳
- 中国气象科学研究院, 北京 100081
- 摘要：基于最新型Picarro G5101i型光腔衰荡光谱仪，自行设计并集成了适用于海表大气氧化亚氮的船基走航连续观测系统.实验室测试结果显示，该系统准确度优于1.4×10-9 mol·mol-1，精密度优于0.2×10-9 mol·mol-1.通过搭载2017年春季黄海和东海综合调查航次，首次在我国开展了海表大气中氧化亚氮的船载走航式连续观测研究.实践证明，该系统操作简便，运行稳定可靠，可获取高频率高精度的海表大气氧化亚氮摩尔分数数据.同时，基于实际观测工作，初步优化建立了相应的数据质量控制和处理方法，为获取具有国际可比性的观测数据奠定了基础.观测结果显示，春季黄海和东海海表大气中氧化亚氮的摩尔分数范围为（331.0~345.1）×10-9 mol·mol-1，平均值为（333.5 ±1.4）×10-9 mol·mol-1.
- Abstract：Based on the latest Picarro G5101i cavity ring-down spectrometer, a ship-based continuous observation system was integrated for the high-resolution measurement of nitrous oxide in sea surface. The results of laboratory tests showed that the accuracy was better than 1.4×10-9 mol·mol-1 and the precision was better than 0.2×10-9 mol·mol-1. It was the first time to continually observe atmospheric N2O over the Yellow Sea and the East China Sea by 2017. The field campaign proved that the system is stable and easy for operation. We obtained high-frequency and high-precision atmospheric N2O mole fraction data in sea surface during the 2017 survey voyage. A set of ship-based protocols for system operation and data processing were preliminarily developed for obtaining internationally comparable data. The range of atmospheric N2O mole fraction over the Yellow Sea and the East China Sea in spring was (331.0~345.1)×10-9 mol·mol-1, with an average of (333.5±1.4)×10-9 mol·mol-1.
- Key words：Yellow Sea East China Sea ship-based observation nitrous oxide cavity ring-down spectroscopy
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