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

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- A reconnaissance video survey over numerous steep-flanked "Belgica mounds". - A microbathymetric survey with the multibeam system SIMRAD EM 2000 mounted on the ROV over the "Moira mounds" In addition, boxcores were taken for benthic analysis, seven current meters were deployed in S-N transect and W-E transect over Galway Mound, a Lander was placed on Galway mound and some CTD profiles were collected to give an overview of the influence of the different water masses in the Belgica mound area (Fig. A4.3.1-1). Fig. A4.3.1-1: Location of the boxcores, current meters, lander, CTD casts and ROV-dives in the "Belgica mound" Province A. 4.3.2 Variation in sedimentary facies in the "Belgica mound" area Foubert, A., Kozachenko, M., Dorschel, B., Wheeler, A., Gault, J. Recent sedimentation in the Porcupine Seabight consists mainly of (hemi)pelagic and locally reworked successions. Previous studies showed that the uppermost sedimentary layer mostly consists of Holocene foraminiferal sands, representing the interglacial sedimentary environment, followed by several meters of silty clays deposited during - 45 -
glacial periods. There is also evidence for the presence of rock debris on the seafloor (Kidd & Huggett, 1981). These authors also reported a large amount of dropstones (clinker and coal residues) dumped from the steamships. Surprisingly, these residues are, in some locations, even more abundant than ice-rafted debris. The sedimentary processes and the evolution of the sedimentation in the Belgica mound area was described recently by Van Rooij et al. (2003), followed by a more detailed study of the present-day sedimentary pattern and seabed features recognised on TOBI side scan sonar imagery (Huvenne, 2003; Wheeler et al., subm.). Present day environment of the "Belgica mounds" area was also detailed by mapping using high-resolution 100/410kHz side-scan sonar techniques during RV Discovery 248 cruise in July-August 2000 (Wheeler et al., 2001; Kozachenko et al., 2003). Video imagery collected during ROV Victor dive 214 was the subject of facies analysis. This was performed in order to emphasise changes in the distribution and type of coral populations (e.g. live/dead; dense/patchy) on mounds and mound’s flanks, and characterise types of seabed in the off mound areas (e.g. rippled/unrippled sands; dropstones). On the basis of video observations a number of facies characteristic for the study area were derived (Table A4.3.2-1). Each of the facies was given a code that was typed in the added column in the navigation file of the dive. Consequently this data was integrated within GIS using Arc View 3.2a and each facies was colour-coded, therefore giving a visual insight into seabed facies distribution in the surveyed area. Table A4.3.2-1: Seabed facies classification used for the ROV Victor dive 214 video interpretation. Facies No Facies name 1 Dense coral coverage (live & dead) 2 Dense coral coverage (mostly dead) 3 Sediment clogged dead corals and/or rubble 4 Patchy mostly live corals on rippled seabed 5 Patchy mostly dead corals on rippled seabed 6 Patchy mostly dead corals on unrippled seabed 7 Dropstone (gravel and/or boulders) dominated seabed 8 Dropstones (gravel and/or boulders) - patchy distribution on unrippled seabed 9 Dropstones (gravel and/or boulders) - patchy distribution on rippled seabed 10 Rippled seabed with occasional dropstones 11 Unrippled seabed with occasional dropstones 12 Rock outcrops(?) - 46 -
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 and 20: aseline navigation antennae which a
Page 21 and 22: Fig. A1-3: Entire cruise track of R
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: A. 4.3 Sedimentary and hydrodynamic
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
Page 73 and 74: A. 4.3.4 Influence of mound topogra
Page 75 and 76: A. 4.3.5 Photo lander deployment on
Page 77 and 78: - UMI data logger controlling a tra
Page 79 and 80: Fig. A4.3.5-3. Close-up view of the
Page 81 and 82: Lineated features are present NE of
Page 83 and 84: CARACOLE Cruise Report 30/07/2001 (
Page 85 and 86: intermediate nepheloid layers (Dick
Page 87 and 88: Fig. A4.4.1-2. Location of main stu
Page 95 and 96: A. 4.4.3 Biogeoprocesses along the
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Box Core Sample Log Sheet Station N
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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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- 248 -
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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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