Spectral distributions of visible light wavelengths (~320-950 nm) from Kangerlussuaq, Greenland

This dataset consists of irradiance values (E) for upwelling and downwelling under ice (both with and without snow cover) for the spectrum of visible light wavelengths (~320-950 nm). These data were collected via a hole drilled under the ice to allow for a TriOS Ramses ACC VIS cosine-corrected hyperspectral radiometer to determine the under ice upwelling and downwelling irriadiance between wavelengths 320-950 nm at a resolution of 1.3 nm. Downwelling irradiance was measured from 3 cm below the bottom of the sea-ice down to a depth of 8.0-9.0 m, with a vertical resolution of 0.5 m. Upwelling irradiance was measured from 3 cm below the bottom of the sea-ice to 3.5-4.0 m with a resolution of 0.5 m. All TriOS values were taken in triplicate and the average of these values per wavelength are provided here. The accompanying paper details the applicability of these data for investigations of PAR on low light adapted ice algae.

本数据集包含可见光波段（约320-950 nm）内冰下上行辐照度与下行辐照度（涵盖有雪盖与无雪盖两种情形）的辐照度值（E）。本次数据通过冰面钻孔采集，采用TriOS Ramses ACC VIS余弦校正型高光谱辐射计，测定320-950 nm波段范围内的冰下上行与下行辐照度，光谱分辨率为1.3 nm。下行辐照度的测量范围为海冰底部下方3 cm处至8.0-9.0 m水深，垂直分辨率为0.5 m；上行辐照度的测量范围为海冰底部下方3 cm处至3.5-4.0 m水深，垂直分辨率同样为0.5 m。所有TriOS辐射计的测量值均进行了三次重复采样，本数据集提供了各波长下的测量平均值。配套论文详细阐述了该数据集在低光适应冰藻的光合有效辐射（Photosynthetically Active Radiation, PAR）研究中的应用价值。