Upwelling spectral radiance as measured in different depths at radiometer station PS73/059-2 (corrected version)@en
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In the previous upwelling radiance (Lu) profile data set (doi:10.1594/PANGAEA.820813), Lu data were wrongly shifted by 3 nm (which responds to the originally resolution of the measurement). The results of the publications related to these data were not affected. Taylor et al. 2013 investigated only Lu data incorrectly shifted by 3 nm, so the analysis was consistent within itself. Taylor et al. 2011 and Bracher et al. 2015 used the remote sensing reflectance (RRS) data calculated from the incorrectly shifted Lu data. The resulting RRS data only showed inconsistencies were the incoming downwelling irradiance changes quickly with wavelengths, which resulted erroneous features <430 nm. We have used both versions (previous and the one presented here) Lu and RRS data and got the same results since the wrong features <430 nm are consistent and are neither used for the hierarchical cluster analysis (only data >430 nm are considered) performed in Taylor et al. 2011 nor for the pigment predictions (since these features are contained in the first empirical orthogonal function) in Bracher et al. 2015.
在先前的上行辐亮度(upwelling radiance, Lu)剖面数据集(DOI:10.1594/PANGAEA.820813)中,Lu数据存在3 nm的偏移误差,该偏移对应原始测量的分辨率参数。相关已发表研究的结果并未受到此误差的影响。 Taylor等人2013年的研究仅使用了存在3 nm偏移误差的Lu数据,因此其分析内部保持自洽。 Taylor等人2011年与Bracher等人2015年的研究均采用了由该存在偏移误差的Lu数据计算得到的遥感反射率(remote sensing reflectance, RRS)数据。由此得到的RRS数据仅在入射下行辐照度随波长快速变化的波段呈现不一致性,进而在<430 nm波段产生错误特征。 我们同时使用了原始版本与本次发布的修正版本Lu和RRS数据进行验证,最终得到了一致的结果:这是因为<430 nm波段的错误特征具有一致性,且既未被用于Taylor等人2011年研究中的分层聚类分析(hierarchical cluster analysis,仅考虑>430 nm波段的数据),也未被用于Bracher等人2015年研究中的色素预测(该类错误特征包含于第一经验正交函数(empirical orthogonal function)中)。



