(ES-2) Organic geochmistry and calculated TM index of surface sediments from the Trondheimsfjord, central Norway

Fterr = fraction of terrestrial organic carbon (Fterr), which is calculated from the Norg/Corg ratio.MT Index = index for the variable input of terrigenous versus marine organic matter.

Fterr（陆地有机碳占比，fraction of terrestrial organic carbon），其数值通过有机氮（Norg, Organic Nitrogen）与有机碳（Corg, Organic Carbon）的比值计算得到。MT指数（MT Index）是用于表征陆源与海源有机质输入差异的指数。