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

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deep-sea research group of the AWI already worked with "Victor 6000" onboard the French RV „L’Atalante“ in 2001. Experiments initiated two years ago were sampled during the night. On Wednesday the 30 th of July we started with the preparation of a rather ambitious project: the installation of a current flume in the Arctic deep sea. Two packages of compartments of this roughly 10 m long channel were deployed with the ship’s winch and "Victor 6000" was subsequently send down to put them together. For one day the ROVpilots were constantly working on this task and finally succeeded in the installation of the first current channel in the Arctic deep-sea to simulate and create gradients at the seafloor. Because of the shape of the flume the current speed should increase inside, thus causing different environmental conditions for the sediment inhabiting fauna, the settling regime for organic particles as well as alterations in exchange processes between sediment and water. The installation of such infrastructure at great water depth is only possible by using working class ROV’s like "Victor 6000". During the last dive of "Victor 6000" at the central station of the long-term deep-sea station at the beginning of the last week in July we had to recover the ROV very fast because another drifting ice field approached. The shuttle and two scientific instruments had to be left at the seafloor. During the following days "Polarstern" worked at other locations, the current flume was somewhat further in the south installed, but the ice situation was constantly evaluated according to actual satellite images provided by the meteorological service onboard. With regard to the end of the cruise leg and the termination of ROV operations some days in advance to ensure that everything of the ROV system is stored before arrival in Tromsø, our last chance to recover the instruments came on Friday. The ice was drifting further northeastward and the ROV was immediately launched under ice-free conditions to recover the instruments and to get some final samples. After safe recovery of "Victor 6000" from its last dive during this expedition the final days of our cruise leg were used to work with winch operated gears, free falling lander systems and the deployment of moorings. In the meantime the ultra short baseline underwater navigation antenna was also removed from the ships’s keel so that we were more flexible in our operation between floating ice. In the early evening of the 4 th of August all station work was completed and "Polarstern" started to head south to Tromsø where the cruise leg ARK XIX/3 c was terminated in the morning of August 7 th . - 19 -
Fig. A1-3: Entire cruise track of RV “Polarstern” during ARK XIX/3 from Bremerhaven via Brest, Galway, Tromsø and Longyearbyen back to Tromsø. - 20 -
Page 1 and 2: Preface The expedition ARK XIX/3 wi
Page 3 and 4: B. 1 Cruise leg ARK XIX/3b: An intr
Page 5 and 6: The ARK XIX/3 expedition A. 1 Itine
Page 7 and 8: positioning and navigation of the "
Page 9 and 10: was followed to obtain video materi
Page 11 and 12: On Friday morning the 20 th of June
Page 13 and 14: Fig. A1-2: The working area of the
Page 15 and 16: "Polarstern" (actual air temperatur
Page 17 and 18: 6000" was still at depth "Polarster
Page 19: aseline navigation antennae which a
Page 23 and 24: At end of the leg pressure rising b
Page 25 and 26: The temperatures during the cruise
Page 27 and 28: Most frequent wind direction was so
Page 29 and 30: A. 3.1 High resolution seabed mappi
Page 31 and 32: On the other hand, the accuracy of
Page 33 and 34: The sampling campaign was also unde
Page 35 and 36: Hydrosweep DS2 is installed onboard
Page 37 and 38: Fig. A4.2-2: Normalized backscatter
Page 39 and 40: In addition to the micro bathymetry
Page 41 and 42: ackscatter value of -37.0dB, -38.9d
Page 43 and 44: athymetry and angular backscatter d
Page 45 and 46: A. 4.3 Sedimentary and hydrodynamic
Page 47 and 48: glacial periods. There is also evid
Page 49 and 50: Fig. A4.3.2-2: Visualisation of dif
Page 51 and 52: It seems that all the mounds along
Page 53 and 54: Visible calcareous fauna removed (b
Page 55 and 56: Fig. A4.3.3-2 Location of SAMS Phot
Page 57 and 58: Box Core Sample Log Sheet Station N
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Box Core Sample Log Sheet Station N
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A. 4.3.4 Influence of mound topogra
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A. 4.3.5 Photo lander deployment on
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- UMI data logger controlling a tra
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Fig. A4.3.5-3. Close-up view of the
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Lineated features are present NE of
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CARACOLE Cruise Report 30/07/2001 (
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intermediate nepheloid layers (Dick
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Fig. A4.4.1-2. Location of main stu
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A. 4.4.3 Biogeoprocesses along the
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in the database with the exact posi
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The areas with significant benthic
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predators and strong bottom current
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faunal distribution. Palaentologica
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ocks predate the last glaciation, s
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A. 4.4.6 Biological and geological
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Hovland M, Croker PF, Martin M (199
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Live fauna Sediments Live fauna and
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sites can subsequently be transport
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4) The NSOW has similar water mass
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0 100 200 300 400 500 600 700 800 P
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A. 4.8 Deep water coral ecology and
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and video observations made. On ret
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Fig. A4.8.2-2: This orange, planar
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Fig. A4.8.2-4: Feather-shaped alcyo
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Fig. A4.8.2-7: Top left) Yellow alc
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scour or demersal trawling. The gro
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survey at frequencies of 38, 70, 12
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"Belgica mounds" - Porcupine Seabig
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"Twin mounds" - Porcupine Bank 14°
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corals were alive, relatively abund
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Network Setup for Tests The setup f
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are only initial testings and much
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pressure produced as a consequence
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surrounded by elevated sediment fea
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B. 2 Microbathymetry on ROV "Victor
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Pitch correction Due to assembling
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Maps Complete area Håkon Mosby Mud
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B. 3 Geochemistry, geophysics and s
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Heat Flow HMMV 2m # # # # # # # # #
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Lat_dec. Lon_dec Name k T_0m PS64/s
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Temperature / Gravity Corer # GC9 #
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Table B3.2-1: Technical specificati
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Sound velocity: As the cores all co
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Fig. B3.3-1: Display of a 4 km long
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sediment cores varies between 166 t
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Fig. B3.4-1b: Lithological descript
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Fig. B3.4-1d: Lithological descript
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Fig. B3.4-1f: Lithological descript
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hydrotroilite and gas hydrate, this
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As an example, a echo sounder image
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B. 5 Biological investigations at t
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- How much methane is oxidized aero
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profiler). Bottom water samples hav
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the water column was measured using
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1 kg of tubeworms in wet weight. Th
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B. 5.2 Microscale analysis of the s
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Laboratory measurements Central sit
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O2, CO3-- (mM) Beggiatoa mats, 30/0
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Photograph of the sulfide oxidising
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Central area No measurements could
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the temperature profile showed adve
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B. 5.3 Methane in gas hydrate beari
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The deployments covered 3 (5) diffe
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flows at the Håkon Mosby Mud Volca
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The quality of the mosaics depends
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[2] Vincent AG, Pessel N, Borgetto
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### ( ) # ###### # ## # # # #### #
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References Milkov, A., Vogt, P., Ch
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ROV "Victor 6000" The ROV "Victor 6
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has spent in organising the coring
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A multiple corer was used to retrie
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At the position of the moorings a C
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Micro profiles of O 2 but also of p
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The current regime luff and lee sid
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2° 3° 4° N2 5° PS64/481 PS64/48
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station IRD archive liner bulk x-ra
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C. 4 Marine Geology Kukina, N. Majo
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2° 3° 4° 5° 6° PS64/481 79°20
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Appendix 1: List of samples for fut
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- 250 -
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material via the Transpolar Drift t
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ounding processes as well. One poss
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The most frequent rock type is sand
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Eastern Greenland, Iceland and Scan
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C. 6 Debris on the seafloor at “H
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Results A summary of the results is
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enthic community are of crucial imp
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frame showed no obvious colonisatio
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subsamples (area of 400 - 800 cm 2
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using shipboard techniques - provid
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Tab C11-1: Stationlist of in situ m
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Tab. C11-2: In-situ measurements of
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Tab. C11-2: In-situ measurements of
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Climate models predict that global
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90 mean copepod densities/ 10 cm 2
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- Molecular phylogeny and phylogeog
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Species Stations Tmetonyx sp.1 326-
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was used to terminate and sample th
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openings of 45° at both sides the
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Station Date Time PositionLat Posit
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E. Participating institutes / compa
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Acronym Participants iSiTEC GmbH IS
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F. Participants F. 1 Participants A
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F. 2 Participants ARK XIX/3b Armand
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F. 3 Participants ARK XIX/3c Bauerf
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Preface The expedition ARK XIX/3 with the German icebreaking RV ...

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