Download Sea-floor-discussions - Norwegian Ocean Observatory Network

WORKSHOP ON
CABLE-BASED
OCEAN OBSERVATORIES
11-12 JUNE 2007, RADISSON SAS HOTEL NORGE, BERGEN
Research topics within [Seafloor]
Participants:
Kuvvet Atakan
Jørn Einen
Christine Zuhlsdorf
Jon Oddvar Hellevang
Svein Winther
Roland Person
WORKSHOP ON CABLE-BASED OCEAN OBSERVATORIES,11-12 JUNE 2007, RADISSON SAS HOTEL NORGE, BERGEN
Main research topics of interest are:
– Seismology (earthquake monitoring in
association with larger tectonic processes,
geohazards, precursory phenomena)
– Marine geology (sedimentary processes,
gas-hydrates etc.)
– GeoBio interactions (interactions between
the plate-tectonic and associated biological
processes)
– Instrumentation (developmental needs and
capacities)
WORKSHOP ON CABLE-BASED OCEAN OBSERVATORIES,11-12 JUNE 2007, RADISSON SAS HOTEL NORGE, BERGEN
Main geographical
target areas:
- Mid-oceanic ridges
- Continental margin
WORKSHOP ON CABLE-BASED OCEAN OBSERVATORIES,11-12 JUNE 2007, RADISSON SAS HOTEL NORGE, BERGEN
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GeoBio: Interested in micro-organisms at deep waters (>500 m). There is a
need for understanding the environmental parameters such as temp., chemical
composition, hydrothermal activity, microbe-mineral interactions. Do not need
continuous monitoring in the start. Data collection in terms of rock samples,
water saples and experimental retrieval. Mostly interested in mid-oceanic ridges
(Mohns and Knipovitch). Seismic data would be relevant to link (to identify new
vents etc.).
Marine geology: Interested in the sedimentary processes on the seafloor.
Pock-marks, their origin and development, stability over time. Interaction
between the gas-hydrates, methane emmision, slope stability. Interested in
quantifying and characterizing the gas-hydrate accumulates, their melting
process and implications for the slope instability processes (usually in shallow
waters). Main target area is the Norwegian continental margin. Mapping of the
gas-hydrates is the prime objective in a regional context. Biological-diversity
and ecosystems in pock-marks. Repeated micro-bathymetry measurements of
the pock-marks (to see the chances in sedimentation). For mapping the gashydrates, the interest is in a larger area. Need continuous measurements of
gas-seepage and idetify activities such as thermal vents (for further data
collections in active periods). Video-monitoring of the vents. Geoacoustic
equipment for detecting the vents, temperature and chemical composition
measurements.
WORKSHOP ON CABLE-BASED OCEAN OBSERVATORIES,11-12 JUNE 2007, RADISSON SAS HOTEL NORGE, BERGEN

Seismology: A large proportion of earthquakes detected by
the Norwegian National Seismic Network (NNSN is operated
by the GEO, UiB), are located offshore. It is therefore natural
to enhnace the observation capacity with ocean-bottom
seismographs (OBS). In general detailed monitoring is needed
in areas where earthquake activity is high (such as along the
continental margin at Nordland-coast, offshore Møre etc.).
Another scientific target area for detailed monitoring is along
the mid-ocanic ridge in the northern Atlantic, where processes
such as plate-tectonics of slow-spreading, interaction between
the submarine volcanic activity and earthquakes. In addition,
the micro-earthquake activity and the swarms can be used as
precursors of the hydrothermal activity along the MOR.
Microearthquake activity could also be monitored for gashydrates.
WORKSHOP ON CABLE-BASED OCEAN OBSERVATORIES,11-12 JUNE 2007, RADISSON SAS HOTEL NORGE, BERGEN
 Instrumentation: CMR in Bergen is in
general interested in developing
instrumentation for various monitoring
purposes. Currently two types of instrument
development are being conducted. (1) CO2
monitoring in water. (2) Leakage of CO2 from
geological storage into the sea-water. Target
scientific problems are related to geological
storage of CO2 and climate-change problems.
There is generally a need for specific
instrument development.
WORKSHOP ON CABLE-BASED OCEAN OBSERVATORIES,11-12 JUNE 2007, RADISSON SAS HOTEL NORGE, BERGEN
 Link between the CMR-UiB in developing
new instrumentation based on needs of
the scientific objectives and the
technological developments.
 Data management, including the
instruments, acqusition systems,
communications, storage and
processing. It is important to develop
standards in data streams.
WORKSHOP ON CABLE-BASED OCEAN OBSERVATORIES,11-12 JUNE 2007, RADISSON SAS HOTEL NORGE, BERGEN
WORKSHOP ON CABLE-BASED OCEAN OBSERVATORIES,11-12 JUNE 2007, RADISSON SAS HOTEL NORGE, BERGEN