| Identifier | 2023-018-FA | ||||||||
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| Alternate names | Hydrate Ridge SeepDOM | ||||||||
| Purpose | Investigate production, flux and bioavailability of seep-derived dissolved organic matter | ||||||||
| Location | Hydrate Ridge methane seeps | ||||||||
| Summary | From Aug 12-Aug 19, 2023, water samples, sediment and pore fluids were collected from Hydrate Ridge and Astoria Canyon, offshore of Oregon, USA aboard the R/V Atlantis. 105 water samples were collected in Niskin bottles during nine CTD casts targeting Hydrate Ridge and areas in Astoria Canyon. 101 sediment and pore water samples were collected from six gravity cores collected in Astoria Canyon. 159 sediment and pore water samples were collected with a multi-corer at Hydrate Ridge and in Astoria Canyon. 203 sediment and pore water samples were collected from 29 push cores collected by the Alvin submersible. The samples were split for multiple analysis by the USGS and partnering institutions. USGS has analyzed, but not released, data for dissolved organic carbon from the pore fluids and the gases methane and CO2 from the water column samples. The data currently reside on John Pohlman’s hard drive and are backed up on the USGS OneDrive. | ||||||||
| Info derived | Chemical composition of pore fluids, gases and water column of seep area | ||||||||
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| Organization |
Woods Hole Oceanographic Institution(WHOI)
Woods Hole, MA02543
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| Organization |
P.O. Box 775
Cambridge, MD21613
410-228-9250
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| Organization |
EAST campus: GEOMAR Helmholtz Centre for Ocean Research Kiel Wischhofstr. 1-3 D-24148 Kiel Germany WEST campus: GEOMAR Helmholtz Centre for Ocean Research Kiel Duesternbrooker Weg 20 D-24105 Kiel Germany
Kiel,
+49-431 600-0
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| Organization |
384 Woods Hole Road
Quissett Campus
Woods Hole, MA02543-1598
(508) 548-8700
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| Principal investigators | John Pohlman | ||
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| Affiliate principal | Laura Lapham, University of Maryland Center for Environmental Science; Jeff Seewald, Woods Hole Oceanographic Institution; Jens Greinert, GEOMAR Helmholtz Centre for Ocean Research Kiel |
| Data category: | Sampling, Geochemical, Environmental Data |
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| Data type: | Chemistry, Experiments (geochemical), Methane |
| Equipment | Usage description | Data types | Datasets |
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| Pore water sampling | Chemistry | (no data reported) | |
| Niskin bottle | Chemistry | (no data reported) | |
| Push Point porewater samplers | Chemistry, Temperature, pH, Dissolved Oxygen, ORP, Methane, Nutrients | (no data reported) | |
| Gas sampler | Dissolved Oxygen, Gas Hydrates, Methane | (no data reported) | |
| Cavity Ring-Down Spectroscopy (CRDS) | CO2, Methane, Experiments (geochemical), Surveys (geochemical), Chemistry | (no data reported) |
