Plattform Platform	Reise-Nr. Cruise-No.	Zeitraum Period	Projekt Project	Arbeitsgebiet Working area
Maria S. Merian	MSM30 CORIBAR	16.07.2013 - 15.08.2013	CORIBAR SD2 - CLIMATIC CONTROL	Barents Sea

Fahrtleiter Chief Scientist	Institut Institute	Auslaufhafen Port of departure	Einlaufhafen Port of return	Stationskarte Station map	Schiffsroute Trackchart
Hanebuth Till J.J.	Universitat Bremen, Zentrum fur Marine Umweltwissenschaften	Troms?	Troms?

Ziel der Reise / Objectives of Cruise:

We want to decipher rapid climatic changes in the north-Atlantic context by a) reconstructing the ice-stream dynamics in the Kveithola region (NW Barents Sea); b) under-standing the sedimentation dynamics at the neighbouring continental slope in response to meltwater discharge and ice-stream history; c) investigating the sedimentation dynamics and depocentre formations on the associated shallow continental shelf; and d) reconstructing the sea-ice history with regard to changes in marine productivity and deep-water formation processes. This international initiative aims to use the seafloor drill rig MeBo for obtaining sediment cores with the for this study necessary length of up to 70 m, flanked by a sediment-acoustic and conventional coring program. Our main scientific objectives of this project are: - To reconstruct the chronology of the deglaciation stages of the Svalbard/Barents Sea Ice Sheet. - To analyze the palaeoceanographic and climatic changes since MIS 5 (6?), concentrating on glacial-interglacial and shorter-term millennial variability. - To understand the mechanisms of generation and dispersal patterns of sediment-laden meltwater discharges. - To investigate the sedimentation dynamics on glacially influenced continental slopes in response to the cyclic glacier-induced sediment deposition. - To understand shelf depocenter formation and to use these deposits as environmental archive for environmental changes and backtracking of sources. - To assess the climate-model credibility in simulating high-latitude ocean and sea-ice processes by verifying simulations under palaeo-boundary conditions with sea-ice proxy reconstructions. Work program Continental Slope drilling sites on the Kveithola Trough-Mouth Fan: The locations of two MeBo sites are selected where the glacially induced debris flow deposits are either absent or so reduced, that a continuous record of glacial-marine/meltwater plume sedimentation is accessible spanning the last two to three glacial stages (MIS (6?-) 5, 4-3, 2-1). These continental-slope records will provide an open-water counterpart to the proximal records of deglaciation to be obtained from the GZWs and the shallow continental shelf and will also strongly extend the few available short palaeoclimatic records from the Storfjorden TMF. Continental shelf drilling sites inside the Kveithola Trough: A transect of 5 MeBo sites will sample the post-glacial (Holocene), deglacial, proglacial, and subglacial sedimentary sequence. Three sites are located in the outer part of the trough at the toe of (or immediately in front of) each GZW, and will allow dating each phase of stillstand during general ice-sheet retreat. Two sites are located in the inner part of the trough on a 40-m thick sedimentary drift, with a high-resolution sedimentary record of the overlying post-glacial ice-retreat history. This core transect will provide ages for the phases of ice-stream retreat and palaeoceanographic information throughout the retreat of the ice grounding line. Shallow continental shelf coring sites (outside the Kveithola Trough): Preferable targets are Late-Quaternary depression fills, confined sediment depocentres, drift bodies, sediment drapes, and marginal trough deposits. These depocenters will serve as environmental archives to reveal a) the development of local sedimentary dynamics, b) information on the proximal material sources, and c) changes in the Holocene climatic/oceanographic history as a complement to the records from the TMF. Another important aspect is d) to decipher deglacial to Holocene sea-level dynamics.

Messungen / Measurements