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RECEIVER Theme 3

The transfer of matter and signals into the ocean floor

RE­CEIVER Theme 3 will track phys­ical, chem­ical and bio­lo­gical para­met­ers re­lated to key as­pects of, for ex­ample, ex­port pro­duc­tion and pre­ser­va­tion of car­bon in ocean-floor sed­i­ments that leave meas­ur­able sig­na­tures in the com­pos­i­tion and prop­er­ties of pela­gic and benthic particles and or­gan­isms. Such sig­nals, also known as prox­ies, pre­serve an im­print of the pre­vail­ing con­di­tions dur­ing particle form­a­tion as well as of the pro­cesses as­so­ci­ated with particle trans­form­a­tion in the wa­ter column and at the ocean floor. We will use these prox­ies to ex­tract quant­it­at­ive in­form­a­tion about the oceanic car­bon pump, and ap­ply them to suit­able high-res­ol­u­tion archives bear­ing the po­ten­tial to re­con­struct past ocean con­di­tions on sub-decadal and shorter times­cales.