"Dissolved methane" refers to methane gas that has mixed with a liquid, such as water, and becomes a part of it.
Sentences with «dissolved methane»
At earlier sites we had found elevated levels of dissolved methane. (realclimate.org)
And I assume from the article that if the methane hydrate deposit is melting then the bottom water will have a high level of dissolved methane. (realclimate.org)
Study finds «no significant correlation between dissolved methane concentrations in groundwater and proximity to nearby oil / gas wells.» (nystateofpolitics.com)