Aerosol absorption coefficients at seven wavelengths measured at Neumayer station in 2019

We operate a 7-wavelength aethalometer (Model AE33, Magee Scientific) which is in operation since 23 January 2019 ongoing. The Aethalometer model AE33 collects aerosol particles continuously by drawing the aerosol-laden air stream through a spot on the filter tape. It analyzes the aerosol by measuring the transmission of light through one portion of the filter tape containing the sample, versus the transmission through an unloaded portion of the filter tape acting as a reference area. This analysis is done at seven optical wavelengths spanning the range from the near-infrared to the near-ultraviolet. The Aethalometer calculates the instantaneous concentration of optically-absorbing aerosols from the rate of change of the attenuation of light transmitted through the particle-laden filter.

本研究采用一台7波长黑碳仪（aethalometer，型号AE33，制造商为Magee Scientific），该设备自2019年1月23日起持续运行至今。AE33型黑碳仪通过将载有气溶胶颗粒的气流抽引至滤带的采样点位，实现气溶胶颗粒的连续采集。其通过对比载样滤带区域与作为参考区域的空白滤带区域的光透射率，完成气溶胶的光学分析。此项分析采用7个光学波长，波段范围覆盖近红外至近紫外。该黑碳仪可基于载颗粒滤带的光透射衰减变化速率，计算得到吸光气溶胶的瞬时浓度。