Journal Article eddy covariance 142M471B3J 7440-44-0 Carbon Carbon Dioxide Methane OP0UW79H66 Soil 059QF0KO0R Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S. Sacramento-San Joaquin Delta Water alternative electron acceptor artificial neural networks carbon emissions carbon flux climate adaptation climate mitigation coastal wetland ecosystem carbon cycling global warming potential greenhouse gas greenhouse gas balance information theory latent energy machine learning mangrove methane