Abstract ID: 635

Radiation balance and turbulent energy fluxes in the Negro River, Central Amazon - Brazil

Studies about carbon cycle in fresh water ecosystems have been exposed these are critical components to biosphere metabolism and exchange CO2 with the atmosphere because are important CO2 source. Make accurate CO2 cycle models claim the input of big Rivers contributions. Than a question needs to be answer: What the importance of rives over natural carbon cycle in the Amazon ecosystem? In view of that the forests tend to sink carbon, while rivers tend to source carbon of the atmosphere. Measurements of radiation balance, turbulent sensible and latent heat and CO2 fluxes, and net radiation, have been made on Negro River, in Central Amazon, during tree months in the rain season, with eddy-correlation method. The Rn calculated to period has a bit higher than expected to Central Amazon forest. The surface albedo of water was near 4% and the water temperature didn’t have a significant change between night and days periods, and did not change more than 3ºC, different to air temperature, 4 ºC to 5 ºC below in average. The sensible and sensible and latent heat fluxes, present a storage of energy in the ecosystem that contribute to maintain important positive CO2 fluxes almost of the sunlight period.

Session:  Carbon - Scaling carbon fluxes to the region from measurements in plots, towers, and aircraft.

Presentation Type:  Poster