Moon-photometric measurements were made at two locations in the Arctic during winter nights using two different modified Sun photometers; a Carter Scott SP02 and a Precision Filter Radiometer (PFR) developed at PMOD/WRC. Values of aerosol optical depth (AOD) were derived from spectral irradiance measurements made at four wavelengths for each of the devices. The SP02 was located near Barrow, Alaska and recorded data from November 2012 to March 2013, spanning five lunar cycles, while the PFR was deployed to Ny-Ålesund, Svalbard each winter from February 2014 to February 2019 for a total of 56 measurement periods. A methodology was developed to process the raw data, involving calibration of the instruments and normalizing measured spectral irradiance values in accordance with site-specific determinations of the extraterrestrial atmospheric irradiance (ETI) as Moon phase cycled. Uncertainties of the derived AOD values were also evaluated and found to be in the range, 0.006–0.030, depending on wavelength and which device was evaluated.

中文翻译：

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监测北极夜间气溶胶光学深度：仪器开发和初步结果


冬季夜晚，使用两种不同的改良太阳光度计在北极的两个地点进行了月球光度测量； Carter Scott SP02 和 PMOD/WRC 开发的精密滤光片辐射计 (PFR)。气溶胶光学深度 (AOD) 值是根据每个设备在四个波长下进行的光谱辐照度测量得出的。 SP02位于阿拉斯加州巴罗附近，从2012年11月到2013年3月记录了数据，跨越了五个月球周期，而PFR则从2014年2月到2019年2月每年冬天部署到斯瓦尔巴群岛的新奥勒松，总共56个测量周期。开发了一种方法来处理原始数据，包括校准仪器并根据月相循环时地外大气辐照度（ETI）的特定地点测定对测量的光谱辐照度值进行归一化。还对导出的 AOD 值的不确定性进行了评估，发现其范围在 0.006-0.030 之间，具体取决于波长和评估的设备。