(ES-4) Principal component analysis of surface sediments from the Trondheimsf...

Results of the PCA used to calculate the TM index. Variables are d13Corg and the fraction of terrestrial organic carbon (Fterr).用于计算TM指数的主成分分析（Principal Component Analysis）结果。本次分析的变量为有机碳同位素d13Corg以及陆生有机碳占比（Fterr）。