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

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Parasound switched off. While surveying the Mud Volcano area the ships speed was reduced and the use of the ships thrusters was limited to its minimum. Fig. B4-1: Gas discharge location at the north western part of HMMV. In total, the EK60 was operated for nearly 70 hours with data recording (and some times more for plain observation) with a total data volume of 37 CD-ROMS, which will be post-processed later on. Fig. B4-2: displays an north-south transect above the centre of the Håkon Mosby Mud Volvano. The plume extends from the seafloor to a height of nearly 800 m. The plume region on the seafloor is around 250 m wide. - 187 -
As an example, a echo sounder image obtained on a north-south survey line is depicted in Fig. B4-2. The shape of the plume obviously follows the dominant current which changes within relatively short time intervals, probably in relation to tidal currents. Subsequently to the hydroacoustic survey, the water column was sampled by CTD rosette and a special high resolution bottom water sampler guided by the EK60 echo sounder. While the ship was slowly following the plume in accordance to the deep current, the vertical positioning of the device was controlled by its reflection signal (Fig. B4-3). Fig. B4-3: The respect height of closing rosette bottles is visualized in the echo sounder image by the CTD’s own reflection. Beside the surveying of the HMMV area, several hydroacoustic transects in the surrounding of the mud volcano were performed to detect related structures. Beside an imagery of shape and dynamics of the plume the acoustic dataset will be used in conjunction with the geochemical dataset to quantify the expulsed sediment and the released gas, respectively. CTD measurements and water sampling For water column characterization and water sampling a SeaBird Electronics 911 plus CTD was used together with a 24 bottle rosette water sampler. Beside the standard sensors the CTD was additionally equiped with fluorometer, transmissionmeter, nephelometer and, for some of the last stations, also with an autonomous video camera and a methane sensor. - 188 -
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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
Page 137 and 138: Fig. A4.8.2-4: Feather-shaped alcyo
Page 139 and 140: Fig. A4.8.2-7: Top left) Yellow alc
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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
Page 153 and 154: are only initial testings and much
Page 155 and 156: pressure produced as a consequence
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: hydrotroilite and gas hydrate, this
Page 191 and 192: B. 5 Biological investigations at t
Page 193 and 194: - How much methane is oxidized aero
Page 195 and 196: profiler). Bottom water samples hav
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Page 199 and 200: 1 kg of tubeworms in wet weight. Th
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
Page 211 and 212: the temperature profile showed adve
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° 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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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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