2 documents found, page 1 of 1
Diffusive methane fluxes from Negro, Solimões and Madeira rivers and fringing l...
Barbosa, Pedro Maia; Melack, John M.; Farjalla, Vinícius Fortes; Amaral, João Henrique Fernandes; Scofield, Vinicius; Forsberg, Bruce RiderThe first extensive set of measurements of methane concentrations and fluxes for the Negro River and its major tributaries combined with complementary data for the Solimões and Madeira rivers and several tributaries are presented and their temporal and spatial variations examined. Fluxes were measured using floating chambers, and dissolved CH4 concentrations were measured by the headspace technique. In the Soli...
Turbulence and Gas Transfer Velocities in Sheltered Flooded Forests of the Amaz...
MacIntyre, Sally; Fernandes Amaral, Joao H.; Barbosa, Pedro Maia; Cortés, Alicia; Forsberg, Bruce Rider; Melack, John M.Seasonally flooded forests along tropical rivers cover extensive areas, yet the processes driving air-water exchanges of radiatively active gases are uncertain. To quantify the controls on gas transfer velocities, we combined measurements of water-column temperature, meteorology in the forest and adjacent open water, turbulence with an acoustic Doppler velocimeter, gas concentrations, and fluxes with floating c...