| Nan Liwen,Wang Xiaoping,Wang Hangzhou,Zhou Hongliang,Chen Ying. 2020. Feasibility study of miniature near-infrared spectrometer for the measurement of solar irradiance within Arctic snow-cover sea ice. Acta Oceanologica Sinica, 39(9):115－124 |
| Feasibility study of miniature near-infrared spectrometer for the measurement of solar irradiance within Arctic snow-cover sea ice |
| 微型近红外光谱仪测量北极积雪覆盖海冰内部太阳辐照度可行性研究 |
| Received:August 31, 2019 |
| DOI：10.1007/s13131-020-1632-y |
| Key words:near-infrared spectrometer low-temperature Arctic sea ice |
| 中文关键词: 近红外光谱仪 低温 北极海冰 |
| 基金项目:The National Natural Science Foundation of China under contract Nos 41976218 and 41606214; the National Key Research and Development Program of China under contract No. 2016YFC1400303; the Fundamental Research Funds for the Central Universities under contract No. 2018FZA4022. |
| Author Name | Affiliation | E-mail | | Nan Liwen | Ocean College, Zhejiang University, Zhoushan 316021, China | | | Wang Xiaoping | Ocean College, Zhejiang University, Zhoushan 316021, China | | | Wang Hangzhou | Ocean College, Zhejiang University, Zhoushan 316021, China | hangzhouwang@zju.edu.cn | | Zhou Hongliang | Zhejiang Heli Electrical Engineering Co., Ltd., Taizhou 317000, China | | | Chen Ying | Ocean College, Zhejiang University, Zhoushan 316021, China | |
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| Abstract: |
| The extremely low temperature, high humidity and limited power supply pose considerable challenges when using spectrometers within the Arctic sea ice. The feasibility of using a miniature low-power near-infrared spectrometer module to measure solar radiation in Arctic sea ice environments was investigated in this study. Temperature and integration time dependences of the spectrometer module were examined over the entire target operating range of –50℃ to 30℃, well below the specified operating range of this spectrometer. Using these observations, a dark output prediction model was developed to represent dark output as a function of temperature and integration time. Temperature-induced biases in the saturation output and linear operating range of the spectrometer were also determined. Temperature and integration time dependences of the signal output were evaluated. Two signal output correction models were developed and compared, to convert the signal output at any temperature within the operating temperature range and integration time to that measured at the reference temperature and integration time. The overall performance of the spectrometer was evaluated by integrating it into a refined fiber optic spectrometry system and measuring solar irradiance distribution in the ice cover with thickness of 1.85 m in the Arctic during the 9th Chinese National Arctic Research Expedition. The general shape of the measured solar irradiance above the snow surface agreed well with that measured by other commercial oceanographic spectroradiometers. The measured optical properties of the sea ice were generally comparable to those of similar ice measured using other instruments. This approach provides a general framework for assessing the feasibility of using spectrometers for applications in cold environments. |
| 中文摘要: |
| 北极海冰环境下低温、高湿以及有限电能供给为光谱仪的使用提出了很大挑战。本文对采用低功耗微型近红外光谱仪测量北极海冰环境下太阳辐射的可行性进行研究。实验研究了光谱仪在-50℃到30℃整个工作温度范围内的温度和曝光时间相关性。该温度远远低于光谱仪规定的工作温度下限。基于此，开发一种采用温度和曝光时间计算暗输出的预测模型。研究了光谱仪饱和输出和线性工作范围的温度相关性，以及信号输出的温度和曝光时间相关性。提出并比较了两种能够将在工作温度内任意温度和曝光时间下测量的信号输出转化成对应于参考温度和参考曝光时间下信号输出的校正模型。光谱仪的整体性能在中国第九次北极科学考察过程中，通过将其集成在一个改进的光纤光谱系统中测量一块厚1.85米海冰内部不同深度太阳辐照度的方式进行评估。结果表明测量得到的入射到海冰表面的太阳辐照度光谱形状与其他商用光学传感器测量结果吻合较好。同时，获得的海冰光学属性与采用其他传感器得到的类似海冰的光学属性也非常接近。本文为评估在寒冷环境下采用光谱仪进行其他研究的可行性提供了一种通用方法。 |
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