Ocean Observatories as a Tool to Advance Gas Hydrate Research

dc.contributor.authorScherwath, Martin
dc.contributor.authorThomsen, L.
dc.contributor.authorRiedel, M.
dc.contributor.authorRömer, M.
dc.contributor.authorChatzievangelou, D.
dc.contributor.authorSchwendner, J.
dc.contributor.authorDuda, A.
dc.contributor.authorHeesemann, M.
dc.description.abstractSince 2009, unprecedented comprehensive long‐term gas hydrate observations have become available from Ocean Networks Canada's NEPTUNE cabled ocean observatory at the northern Cascadia margin. Several experiments demonstrate the scientific importance of permanent power and Internet connectivity to the ocean floor as they have advanced the field of gas hydrate related research. One example is the cabled crawler Wally at Barkley Canyon, enabling live in situ exploration of the hydrate mounds and its associated benthic communities through the crawler's mobility and permanent accessibility throughout the year. Another example is a bubble‐imaging sonar at Clayoquot Slope, revealing the strong relationship between ebullition of natural gas and tidal pressure, without apparent correlation to earthquakes, storms, or temperature fluctuations, in year‐long continuous recordings. Finally, regular observatory maintenance cruises allow additional science sampling including echo‐sounder surveys to extend the observatory footprint. Long‐term trends in the data are not yet apparent but can also become evident from continuous measurements, as ocean observatories such as NEPTUNE are built for a 25‐year lifetime, and expansion of the observatory networks makes these findings comparable and testable.en_US
dc.description.sponsorshipWe thank the Editor Paolo Diviacco and two anonymous reviewers for their help and constructive feedback. Ocean Networks Canada is an initiative of the University of Victoria and has primarily been funded by the Canadian Foundation for Innovation, Transport Canada, Fisheries and Oceans Canada, and the Canadian Province of British Columbia. The seafloor crawler Wally has been funded by Jacobs University and the German Helmholtz Alliance Robotic Exploration of Extreme Environments—ROBEX . Analysis of the bubble‐imaging sonar was funded through the DFG‐Research Center/Cluster of Excellence The Ocean in the Earth System . All seafloor data are available at https://data.oceannetworks.ca, which is a verified DataCite repository (https://repositoryfinder.datacite.org/). Ship‐based echo‐sounding data were acquired by the Geological Survey of Canada's Pacific Geoscience Centre (PGC), the Monterey Bay Aquarium Research Institute (MBARI), the U.S. National Oceanic and Atmospheric Administration (NOAA), and the Ocean Networks Canada, and details and links to the data sources and the corresponding vent locations are available in Riedel et al. (2018) at https://doi.org/10.1038/s41467‐018‐05736‐x.en_US
dc.identifier.citationScherwath, M., Thomsen, L., Riedel, M., Römer, M., Chatzievangelou, D., Schwendner, J., Duda, A., & Heesemann, M. (2019). Ocean Observatories as a Tool to Advance Gas Hydrate Research. Earth and Space Science, 6(12), 2644-2652. https://doi.org/10.1029/2019EA000762.en_US
dc.publisherEarth and Space Scienceen_US
dc.subjectOcean observatoriesen_US
dc.subjectGas hydratesen_US
dc.subjectGas seepageen_US
dc.subjectSeafloor roboticsen_US
dc.titleOcean Observatories as a Tool to Advance Gas Hydrate Researchen_US


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