Hydrate Ridge has the distinction of hosting the first documented subduction-driven cold
seep system that supports chemosynthetic life by Anaerobic Oxidation of Methane as well
as the most widely researched methane hydrate setting at any active continental margin.
Today this site is a vital node of Northeast Pacific regional long-term...
High‐resolution three‐dimensional (3‐D) seismic reflection data acquired on the R/V Thomas G. Thompson in 2000 reveal a pair of bottom simulating reflections (BSRs) across a broad region of southern Hydrate Ridge, offshore Oregon. The primary BSR (BSRp) is a regionally extensive reflection that lies 120–150 m below seafloor and exhibits...
While bubble plumes have been acoustically imaged in the water column above marine gas
hydrate deposits in many studies, little is known about the temporal variation in plume intensity. In
July 2008, we conducted surveys using 3.5 and 12 kHz echosounders and a 75 kHz acoustic Doppler
current profiler (ADCP)...
While bubble plumes have been acoustically imaged in the water column above marine gas
hydrate deposits in many studies, little is known about the temporal variation in plume intensity. In
July 2008, we conducted surveys using 3.5 and 12 kHz echosounders and a 75 kHz acoustic Doppler
current profiler (ADCP)...
While bubble plumes have been acoustically imaged in the water column above marine gas
hydrate deposits in many studies, little is known about the temporal variation in plume intensity. In
July 2008, we conducted surveys using 3.5 and 12 kHz echosounders and a 75 kHz acoustic Doppler
current profiler (ADCP)...
The biogeochemical processes that occur in marine sediments on continental
margins are complex; however, from one perspective they can be considered with respect
to three geochemical zones based on the presence and form of methane: sulfate-methane
transition (SMTZ), gas hydrate stability zone (GHSZ), and free gas zone (FGZ). These
geochemical...
Gas hydrates, pervasive in continental margin sediments, are expected to release methane in
response to ocean warming, but the geographic range of dissociation and subsequent flux of methane to
the ocean are not well constrained. Sediment column thermal models based on observed water column
warming trends offshore Washington (USA) show...
Gas hydrates, pervasive in continental margin sediments, are expected to release methane in
response to ocean warming, but the geographic range of dissociation and subsequent flux of methane to
the ocean are not well constrained. Sediment column thermal models based on observed water column
warming trends offshore Washington (USA) show...
Full Text:
hydrate along the
entire Cascadia upper continental slope is vulnerable to modern climate change
In addition to well established properties that control the presence or absence of the hydrate stability
zone, such as pressure, temperature, and salinity, additional parameters appear to influence the concentration
of gas hydrate in host sediments. The stratigraphic record at Site 17A in the Andaman Sea,
eastern Indian Ocean, illustrates...
