Preface The expedition ARK XIX/3 with the German icebreaking RV ...

sedimentological parameters. During ARK XIX/3c the number of permanent stations
was increased to a total of 15 stations by introducing additional sampling sites along a
latitudinal transect following the 2500 m water depth isobath (Fig. C1).
To characterise and quantify organic matter fluxes to the seafloor, we use moorings
carrying sedimentation traps, which were replaced during ARK XIX/3c (see Chapter C.
1). The exchange of solutes between the sediments and the overlaying waters as well
as the bottom currents were studied to investigate major processes at the sedimentwater-interface.
A micro-profiler, being positioned and activated by the ROV, was used
to assess the oxygen consumption by the benthic community (see Chapter C. 2).
Gradients in oxygen were also measured from bottom water samples in order to
quantify interfacial solute fluxes (including nutrients) and metabolic rates in the benthic
boundary layer. These investigations were completed by the use of an acoustical
current meter, handled by the ROV.
Fig. C1: Deep-sea long-term station AWI-"Hausgarten", west off Spitsbergen
(: sampling sites; : experimental areas; : optical surveys).
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