PMEL's Acoustic and Earth-Ocean Interactions programs have successfully recorded the sound of methane bubbles from the seafloor off the Oregon coast using a hydrophone, opening the door to using acoustics to identify - and perhaps quantify - this important greenhouse gas in the ocean. Methane is found both as an icy hydrate deposit and in a gas phase within the sediments of the continental margins. The methane stored in the Cascadia margin, located offshore Washington,...
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Studies of underwater eruptions are essential to understand the processes that form oceanic crust, and the role submarine volcanoes have in exchanging heat and chemicals with the ocean and in supporting chemosynthetic biological communities. The Ocean Observatories Initiative (OOI) Cabled Array at Axial Seamount is the world’s most advanced underwater volcano observatory, building upon 30+... more