Fig. 4: Downcore profiles of total OC content bound to reactive iron (OC-FeR), the fraction of total organic carbon bound to reactive iron (fOC-FeR), and total organic carbon content (TOC).
From: Millennial scale persistence of organic carbon bound to iron in Arctic marine sediments
The gradual downcore decrease in all three parameters may indicate that sedimentary OC degradation also affects the OC bound to FeR, even though fOC-FeR values are still relatively high in the lower part of these Arctic sediment cores. Other factors than diagenetic processes, such as environmental change, OC, and allochthonous OC-FeR input changes, probably also play a role during the time span investigated here. Note the different scale of the x-axis (sediment core depth) and y-axis (TOC) between each core.
