Don't we have a lack of knowledge of our oceans to be making claims about volcanoes?

As a geologist and skeptic of significant AGW, I thought I would find myself disaggreeing with Dana's first link but it was informative. I have suspected the volume of CO2 and methane emissions were vastly underestimated. I suspect that even the estimate in his link is underestimated. They can estimate that released by volcanism but it wouldn't be very accurate IMO. The volcanoes are located along a ridge called the mid-ocean ridges. They form where oceanic plates spread apart and form. I think they have a pretty good idea where they all are. It isn't like there are separate volcanoes. It is litterally a crack thousands of miles long. There are other volcanoes such as Hawaii that formed from a hot spot and are different. It is important to distinguish between emissions and volcanic emissions. If you limit yourself to volcanic emissions, human emissions certainly dwarf them. Other emissions might be more significant. I doubt that emissions from the oceanic crusts are that significant because they are clearly formed from melt. You get some CO2 from them but emssions of CO2 and methane from continental crusts are more voluminous.

I don't know what Dana is talking about regarding the new oceanic crust being a carbon sink. As new crust is formed in one place, it is subducted and lost in another. If he is referring to chemical reactions at the surface of the crust, I would expect that to be minimal. The ocean floor can act as a huge carbon sink by the accumulation of chemically precipitated carbonates and or accumulation of creatures such as corral, urchins, diatoms, foraminifers, and coccolithophores.

Underwater volcanoes are esimated to emit between 66 to 97 million tonnes of CO2 per year (see links below). However, this is balanced by the carbon sink provided by newly formed ocean floor lava. Consequently, underwater volcanoes have little effect on atmospheric CO2 levels.

We don't even know enough about our own bodies to be making claims with absolute certainty... How long did we hear that eggs and coffee were going to kill you? And that we absolutely need to eliminate all fat from our diets? And exposure to the sun will result in certain death?

Only to find out that lack of Omega 3 fats and Vitamin D from the sunshine is in the end bad for you...

How on earth can we claim to know everything about the planet's climate? It's hubris beyond description.

We know nothing about the Oceans explored about 10% of it . There is no Submarine

capable of diving 7 miles without crushing . and big lights to see with .