WEBVTT

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Full on eruption, baby! Yeah!

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So, the CTD came up and we sampled several of the bottles and we knew that it was likely to be enriched in hydrogen,

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so I ran those samples first and we saw a very significant concentration of hydrogen in the plume.

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We started to see lots of indicators, lots of layers of plumes.

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And Ben just came back and said he’s seen so much hydrogen that he’s had to dilute his samples a lot.

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It’s 750 nanomolar. Background is like one nanomolar, so there’s a lot of hydrogen there.

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So basically the idea behind the sampling is to make sure there’s no air, no atmosphere, in the water sample.

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All your gas is dissolved in the water sample.

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In order to get it out of there and put it in a form that we can analyze, you have to put a headspace on it and we use helium to do that.

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And you kind of shake up the water with this helium and it kind of pulls out all of the gas and

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then you inject that gas into the GC and then you can measure what’s in the gas.

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And then you can back calculate how much was in the water to begin with.

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When you have an eruption, you get a lot of violent interaction between hot rock and seawater and it creates lots of particles.

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Basically, we loaded particles onto these filters and I’ll take them back to the lab and I’ll get the elemental composition of the particles.

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You see how this one, kind of like, when I did the rinse. Yeah. It move the stuff around a little?

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It moves some stuff around, which usually means sulfur.

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If it comes right out of the vents and it’s super yellow, then it’s obvious.

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But once you get up in the water column, it’s probably got iron and sulfur both in it.

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Oh, absolutely.

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With Ahyi having erupted and NW Rota having stopped, you start to ask yourself the question, how frequently do these things do this?

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So it’s really pretty cool that we found another erupting volcano.

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I mean, I came out here to study the erupting volcano at NW Rota. Shut out. I didn’t get my work done.

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And then, here’s another opportunity.