@Article{PachecoSACRASAO:2014:RiInRe,
               author = "Pacheco, Felipe Siqueira and Soares, M. C. S. and Assireu, Arcilan 
                         Trevenzoli and Curtarelli, Marcelo Pedroso and Roland, F. and 
                         Abril, G. and Stech, Jos{\'e} Luiz and Alval{\'a}, Plinio Carlos 
                         and Ometto, Jean Pierre Henry Balbaud",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {} and 
                         {Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and {} and {} and 
                         {Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and {Instituto Nacional de 
                         Pesquisas Espaciais (INPE)}",
                title = "River inflow and retention time affecting spatial heterogeneity of 
                         chlorophyll and water-air CO2 fluxes in a tropical hydropower 
                         reservoir",
              journal = "Biogeosciences Discussions",
                 year = "2014",
               volume = "11",
               number = "6",
                pages = "8531--8568",
             keywords = "tropical reservoirs, river inflow, retention time, carbon dioxide 
                         flux.",
             abstract = "Much research has been devoted to understanding the complexity of 
                         biogeochemical and physical processes responsible for the 
                         greenhouse gas (GHG) emissions from hydropower reservoirs. Spatial 
                         complexity and heterogeneity of GHG emission may be observed in 
                         these systems because it is dependent on flooded biomass, river 
                         inflow, primary production and dam operation. In this study, we 
                         investigate the relationships between waterair CO2 fluxes and 
                         phytoplanktonic biomass in Funil Reservoir, an old and stratified 
                         tropical reservoir, where intense phytoplankton blooms and low 
                         partial pressure of CO2 (pCO2) are observed. Our results showed 
                         that Funil Reservoir sea sonal and spatial variability of 
                         chlorophyll concentration (Chl) and pCO2 is more related to 
                         changes in river inflow over the year than environmental factor 
                         such as air temperature and solar radiation. Field data and 
                         hydrodynamic simulations reveal that the river inflow contributes 
                         to increased heterogeneity in dry season due to the variation of 
                         reservoir retention time and river temperature. Contradictory 
                         conclusion can be drawn if temporal data collected only near the 
                         dam is considered instead of spatial data to represent CO2 fluxes 
                         in whole reservoir. The average CO2 fluxes was \−17.6 and 
                         22.1 mmolm\−2 d\−2 considering data collected near 
                         the dam and spatial data, respectively, in periods of low 
                         retention time. In this case, the lack of spatial information can 
                         change completely the role of Funil Reservoir regarding GHG 
                         emissions. Our results support the idea that Funil Reservoir is a 
                         dynamic system where the hydrodynamics represented by changes in 
                         river inflow and retention time is potentially more important 
                         force driving both Chl and pCO2 spatial variability than in-system 
                         ecological factors.",
                  doi = "10.5194/bgd-11-8531-2014",
                  url = "http://dx.doi.org/10.5194/bgd-11-8531-2014",
                 issn = "1810-6277",
                label = "lattes: 2691497637313274 7 PachecoSACRASAO:2014:RiInRe",
             language = "en",
           targetfile = "bgd-11-8531-2014.pdf",
                  url = "http://www.biogeosciences-discuss.net/11/8531/2014/bgd-11-8531-2014.html",
        urlaccessdate = "26 abr. 2024"
}