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

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taking it for several minutes in different distances above the sea bottom and natural current obstacles, respectively. Fig. C2-1: The in situ O 2 micro profiler (MIC) being taken out of the shuttle lander by the ROV. These measurements have been performed in close co-operation with benthos biological investigations as well. Fig. C2-2: Acoustic current meter being deployed close above the seafloor by means of the ROV. - 235 -
The current regime luff and lee side of a large drop stone has been measured before sediments were taken at these locations around the drop stone. By doing so it is expected to get further information about the influence of bottom currents on the benthic fauna C. 3 Sedimentation at the western Svålbard margin Matthiessen, J., Kunz-Pirrung, M., Pirrung, M. The "Hausgarten" area is located at the western Svålbard continental margin from 78°- 80° N which is characterized by a complex morphology. Plate tectonic activity and glacial erosion and deposition led to pronounced topographic gradients with prograding deep-sea fans, ridges and troughs, of which the Molloy Hole is the deepest depression in the Arctic realm. Pelagic sedimentation at continental margins, in general, is principally overprinted by a lateral influx of material from the shelves. In the "Hausgarten" area, cross-shelf troughs off Kongsfjorden and Isfjorden are important conduits for transport of water and sediment from the coastal area to the slope. Slope instability may subsequently trigger gravity flows, in particular during times of low sea level stand. The depositional conditions in the eastern Fram Strait are further complicated by specific local conditions, related to sea-ice cover, water mass exchange between the Arctic Ocean and the Nordic Seas, and deep-water formation resulting in a spatial and temporal heterogeneity of sediment composition and distribution. The northward flowing West Spitsbergen Current (WSC) may meridionally advect lithogenic and biogenic matter from the Norwegian Sea. Sediment may be supplied from Storfjorden south of Spitsbergen, when dense sediment-loaded cold water cascades descend downslope and are entrained in the WSC. Bottom water exchange may particularly occur via the "Hausgarten" area east of Hovgaard Ridge. The Transpolardrift may transport sea ice and sediments from the Siberian Arctic to the Fram Strait. These processes are documented in a number of geological records from the past 10.000 to 15.000 years (Hebbeln et al., 1994; Andersen et al., 1996) but their importance in the modern environment has not been evaluated. Sedimentological investigations during expedition ARK XIX/3c therefore concentrated on sampling of surface and near-surface, to study the large-scale depositional environment in the "Hausgarten" area. - 236 -
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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
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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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Page 189 and 190: As an example, a echo sounder image
Page 191 and 192: B. 5 Biological investigations at t
Page 193 and 194: - 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
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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: Micro profiles of O 2 but also of p
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Page 241 and 242: station IRD archive liner bulk x-ra
Page 243 and 244: C. 4 Marine Geology Kukina, N. Majo
Page 245 and 246: 2° 3° 4° 5° 6° PS64/481 79°20
Page 247 and 248: Appendix 1: List of samples for fut
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Page 253 and 254: material via the Transpolar Drift t
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Page 259 and 260: Eastern Greenland, Iceland and Scan
Page 261 and 262: C. 6 Debris on the seafloor at “H
Page 263 and 264: Results A summary of the results is
Page 265 and 266: enthic community are of crucial imp
Page 267 and 268: frame showed no obvious colonisatio
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Page 271 and 272: using shipboard techniques - provid
Page 273 and 274: Tab C11-1: Stationlist of in situ m
Page 275 and 276: Tab. C11-2: In-situ measurements of
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Page 279 and 280: Climate models predict that global
Page 281 and 282: 90 mean copepod densities/ 10 cm 2
Page 283 and 284: - Molecular phylogeny and phylogeog
Page 285 and 286: 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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