Sediment accumulation and carbon burial in four hadal trench systems - Oguri, Kazumasa (Japan Agency for Marine-Earth Science and Technology. Research Institute for Global Change) ; Masqué Barri, Pere (Universitat Autònoma de Barcelona. Institut de Ciència i Tecnologia Ambientals) ; Zabel, Matthias (University of Bremen. Center for Marine Environmental Sciences) ; Stewart, Heather A. (Lyell Centre. British Geological Survey) ; MacKinnon, Gillian (Scottish Universities Environmental Research Centre) ; Rowden, Ashley A. (Victoria University of Wellington) ; Berg, Peter (University of Virginia. Department of Environmental Sciences) ; Wenzhöfer, Frank (Max-Planck-Institute for Marine Microbiology) ; Glud, Ronnie N. (University of Southern Denmark. Department of Biology) ; Universitat Autònoma de Barcelona. Departament de Física