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

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isotopic composition which bears diagnostic information on the carbon source and/or metabolic carbon fixation pathway utilised by its producer. Tab. B5.1-1: Sediment samples obtained by multiple corer (MUC) and ROV (PC – push corer). Sediment samples were split into different layers for rate measurements, biomarker analysis, for total bacterial counts, fluorescence in situ hybridization (FISH), as well as for microbial diversity analysis (0-10 cm in 1 cm horizons, >10 cm in 2 cm horizons). Device Station No Date Core No Dive Sediment conditions, community Lat N Long E Centre, GH, slightly MUC PS64_312 28-Jun-03 7,8 (4) sulphidic, gas 72° 0,25 14° 43,49 MUC PS64_314 28-Jun-03 3,6 Centre, GH, slightly sulphidic, gas 72° 0,25 14° 43,54 Beggiatoa mat, ROV PS64_317-1 29-Jun-03 8 219 sulphidic, gas 72° 0,156 14° 43,887 ROV PS64_317-2 29-Jun-03 14,17 219 Beggiatoa mat, sulphidic, gas 72° 0,163 14° 43,880 Beggiatoa mat, MUC PS64_322 30-Jun-03 2,3,5,6,7 sulphidic, gas 72° 0,18 14° 43,85 7,8,12, 11,10,9,2 ROV PS64_326 1-Jul-03 2 220 Pogonophora 72° 0,059 14° 42,130 ROV PS64_347 6-Jul-03 1,2,3, 6,7,8 222 centre, grey bacterial mat 72° 0,297 14° 43,397 Centre north, Pogonophora, slightly MUC PS64_354 8-Jul-03 1,2,3,7 sulphidic 72° 0,32 14° 43,62 MUC PS64_356 8-Jul-03 4,5,6,7,8 Pogonophora on rim 72° 0,05 14° 44,18 Eastern flank, MUC PS64_362-1 10-Jul-03 2,5,7,8 oxidized sed 72° 0,21 14° 42,47 Centre middle, small mat pieces on MUC PS64_366 10-Jul-03 1,2 sediment 72° 0,17 14° 43,55 13,14,27, centre, grey bacterial ROV PS64_377 12-Jul-03 23 224 mat 72° 0,309 14° 43,352 ROV PS64_377 12-Jul-03 1,2 224 naked, fresh sediment 72° 0,307 14° 43,676 ROV PS64_377 12-Jul-03 3,4 224 Bacterial mat 72° 0,307 14° 43,676 ROV PS64_377 12-Jul-03 17,18 224 Transition between naked sediment and mats 72° 0,307 14° 43,676 ROV PS64_398 16-Jul-03 7,8 225 Pogonophora (7) embedding bacterial mat 72° 0,389 14° 43,628 All these samples will be processed in the home laboratories of MPI and AWI. We will compare oxidation rates obtained by numerical modeling of changes in pore water concentrations of methane and sulfate to the measurements with radioactive tracer, as well as to measurements obtained with in situ instruments (chamber lander and - 193 -
profiler). Bottom water samples have been obtained at various sites to investigate methane oxidation in the water column, measured by injection of tritiated methane. Tab B5.1-2: Sediment samples obtained by gravity corer. Sediment samples were split into different layers for rate measurements, biomarker analysis, for total bacterial counts, fluorescence in situ hybridization (FISH), as well as for microbial diversity analysis (every 25- 50 cm over the total length of the core). In most cores up to 50 cm of the surface appeared to be lost. The recovered length was measured in the opened cores. Device Station No Date length [cm] Sediment conditions, community Lat N Long E GC PS64/332 2-Jul-03 461 Centre, warm fluids 72° 0,28 14° 43,57 GC PS64/336 5-Jul-03 470 Pogonophora, small pieces of GH at -410cm 72° 0,02 14° 43,57 GC PS64/339 5-Jul-03 465 Centre, archive 72° 0,13 14° 43,81 GC PS64/341 5-Jul-03 114 Pogonophora 10cm chunk of GH at -114cm 72° 0,17 14° 43,85 GC PS64/371 11-Jul-03 488 Bacterial mat but first 0.5 to 1m lost 72° 0,20 14° 43,88 GC PS64/372 11-Jul-03 430 Centre NW with warm fluids 72° 0,26 14° 43,59 GC PS64/373 11-Jul-03 453 Centre middle 72° 0,21 14° 43,66 GC PS64/374 11-Jul-03 166 Bubble site with Pogonophora in core 72° 0,38 14° 43,61 Water samples are taken with three types of water samplers: the rosette for 4-1200 m above seafloor (CTD), the horizontal water sampler (BWS) as well as from the ROV bottles (PEP) to investigate the methane emission from the sediments into the water column (Tab. B5.1-3). The major aim of this study was the investigation of microbial sulfate reduction (SRR) and anaerobic methane oxidation (AOM) in methane enriched surface sediments of the HMMV. For the measurement of methane concentrations in sediments, a sample is mixed into a sodium hydroxide solution. After equilibration with the headspace of the sample vial, a gas sample is removed with a gas tight syringe and injected into a gas chromatograph with a flame ionisation detector. Sulfate and sulfide concentrations in sediment pore-water fixed with zinc chloride will be determined photometrically. For the tracer measurements both radioactive tracers 35 SO 4 and 14 CH 4 were injected into replicate core sub-samples (inner diameter 1 cm) which were incubated anoxically at in situ temperature for 24 hrs. After incubation, the sediment sub-cores (1-5, 7-11, 13-17 cm) were mixed with zinc acetate (20% w/w) or sodium hydroxide (2.5% w/w), respectively, to stop the bacterial activity. These samples will - 194 -
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Preface The expedition ARK XIX/3 wi
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B. 1 Cruise leg ARK XIX/3b: An intr
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The ARK XIX/3 expedition A. 1 Itine
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positioning and navigation of the "
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was followed to obtain video materi
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On Friday morning the 20 th of June
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Fig. A1-2: The working area of the
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"Polarstern" (actual air temperatur
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6000" was still at depth "Polarster
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aseline navigation antennae which a
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Fig. A1-3: Entire cruise track of R
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At end of the leg pressure rising b
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The temperatures during the cruise
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Most frequent wind direction was so
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A. 3.1 High resolution seabed mappi
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On the other hand, the accuracy of
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The sampling campaign was also unde
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Hydrosweep DS2 is installed onboard
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Fig. A4.2-2: Normalized backscatter
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In addition to the micro bathymetry
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ackscatter value of -37.0dB, -38.9d
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athymetry and angular backscatter d
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A. 4.3 Sedimentary and hydrodynamic
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glacial periods. There is also evid
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Fig. A4.3.2-2: Visualisation of dif
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It seems that all the mounds along
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Visible calcareous fauna removed (b
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Fig. A4.3.3-2 Location of SAMS Phot
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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
Page 143 and 144: survey at frequencies of 38, 70, 12
Page 145 and 146: "Belgica mounds" - Porcupine Seabig
Page 147 and 148: "Twin mounds" - Porcupine Bank 14°
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Page 151 and 152: Network Setup for Tests The setup f
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Page 157 and 158: surrounded by elevated sediment fea
Page 159 and 160: B. 2 Microbathymetry on ROV "Victor
Page 161 and 162: Pitch correction Due to assembling
Page 163 and 164: Maps Complete area Håkon Mosby Mud
Page 165 and 166: B. 3 Geochemistry, geophysics and s
Page 167 and 168: Heat Flow HMMV 2m # # # # # # # # #
Page 169 and 170: Lat_dec. Lon_dec Name k T_0m PS64/s
Page 171 and 172: Temperature / Gravity Corer # GC9 #
Page 173 and 174: Table B3.2-1: Technical specificati
Page 175 and 176: Sound velocity: As the cores all co
Page 177 and 178: Fig. B3.3-1: Display of a 4 km long
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Page 181 and 182: Fig. B3.4-1b: Lithological descript
Page 183 and 184: Fig. B3.4-1d: Lithological descript
Page 185 and 186: Fig. B3.4-1f: Lithological descript
Page 187 and 188: hydrotroilite and gas hydrate, this
Page 189 and 190: As an example, a echo sounder image
Page 191 and 192: B. 5 Biological investigations at t
Page 193: - How much methane is oxidized aero
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Page 201 and 202: B. 5.2 Microscale analysis of the s
Page 203 and 204: Laboratory measurements Central sit
Page 205 and 206: O2, CO3-- (mM) Beggiatoa mats, 30/0
Page 207 and 208: Photograph of the sulfide oxidising
Page 209 and 210: Central area No measurements could
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Page 213 and 214: B. 5.3 Methane in gas hydrate beari
Page 215 and 216: The deployments covered 3 (5) diffe
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Page 219 and 220: The quality of the mosaics depends
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Page 225 and 226: References Milkov, A., Vogt, P., Ch
Page 227 and 228: ROV "Victor 6000" The ROV "Victor 6
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Page 231 and 232: A multiple corer was used to retrie
Page 233 and 234: At the position of the moorings a C
Page 235 and 236: Micro profiles of O 2 but also of p
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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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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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