1. Coastal and Marine Hazards and Resources
  2. Geoscience Data System

Field Activity 2018-045-FA

Identifier 2018-045-FA
Alternate names POS526
Purpose Quantify CH4 and CO2 fluxes from seafloor and across air-water interface at shallow area of methane seepage in North Sea
Location North Sea, The Netherlands
Summary John Pohlman and Michael Casso (USGS) participated in a research cruise (aboard RV Poseidon, GEOMAR, Kiel, Germany) to study a shallow depth seafloor methane seep field at Dogger Bank in the North Sea. Real time measurements of pumped surface water were made for dissolved methane and carbon dioxide concentration and their del 13C values, using Cavity Ring-Down Spectroscopy (CRDS). Additionally, approximately 262 discrete samples were analyzed, mostly from CTD casts.
Info derived Gas concentrations and stable carbon isotope values
Projects
Platform
Other
Itinerary
Start Bergen, Norway 2018-07-20
End Hirtshals, Denmark 2018-08-02
Days in the field 11
Bounds
West 2.843832
East 4.21684
North 54.157897
South 52.94518

Personnel

Organization
384 Woods Hole Road
Quissett Campus
Woods Hole, MA02543-1598
(508) 548-8700
Principal investigators John Pohlman
Crew members
Michael Casso
Scientist, Staff
John Pohlman
Scientist, Staff
Information specialist(s)
Michael Casso
Specialist, Information
Affiliate principal Jens Greinert, GEOMAR-Kiel

Data types and categories

Data category: Environmental Data, Geochemical
Data type: Chlorophyll, CO2, Dissolved Oxygen, Fluorescence, Meteorology, Methane, Surveys (geochemical)

Equipment used

Equipment Usage description Data types Datasets
Cavity Ring-Down Spectroscopy (CRDS) CO2, Methane, Experiments (geochemical), Surveys (geochemical), Chemistry (no data reported)
Other Unknown, Meteorology, CTD, Temperature, pH, CO2, Radon, Conductivity, Current, Dissolved Oxygen, Turbidity, Fluorescence, Wave, ORP, Tide, Methane, Depth, Light, Nitrate, Gas Hydrates, Density, Sediment Properties, Osmometic Pressure, Chlorophyll, Nutrients, Pressure (no data reported)
YSI EXO2 Multi-parameter Sonde Chlorophyll, Conductivity, Depth, Dissolved Oxygen, Fluorescence, Nitrate, ORP, pH, Temperature, Turbidity (no data reported)

Publications

Samples collected during this field activity