Field Activity Details for field activity 2018-045-FA

Other ID: POS526

Status: Completed

Organization(s): USGS, Woods Hole Coastal and Marine Science Center

Funding Program(s): USGS GAS HYDRATES (LQ000FP)

Principal Investigator(s): John Pohlman

Affiliate Investigator(s): Jens Greinert, GEOMAR-Kiel

Information Specialist(s): Michael Casso

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

Scientific Purpose/Goals: Quantify CH4 and CO2 fluxes from seafloor and across air-water interface at shallow area of methane seepage in North Sea

Vehicle(s):

Start Port/Location: Bergen, Norway

End Port/Location: Hirtshals, Denmark

Start Date: 2018-07-20

End Date: 2018-08-02

Equipment Used: Cavity Ring-Down Spectroscopy (CRDS), Other, YSI EXO2 Multi-parameter Sonde

Information to be Derived: Gas concentrations and stable carbon isotope values

Summary of Activity and Data Gathered: 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.

Staff: Michael Casso, John Pohlman

Affiliate Staff:

Notes:

Location:

North Sea, The Netherlands

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Publications

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Data Acquired