@InProceedings{WardSNVLGWBCKR:2017:InTiBi,
               author = "Ward, Nicholas D. and Sawakuchi, Henrique O. and Neu, Vania and 
                         Val{\'e}rio, Aline de Matos and Less, Diani and Guedes, Victor 
                         and Wood, Jordana and Brito, Daimio C. and Cunha, Alan C. and 
                         Kampel, Milton and Richey, Jeffrey E.",
          affiliation = "{Pacific Northwest National Laboratory} and {CENA Center for 
                         Nuclear Energy in Agriculture} and {Universidade Federal Rural da 
                         Amaz{\^o}nia (UFRA)} and {Instituto Nacional de Pesquisas 
                         Espaciais (INPE)} and {Universidade Federal do Oeste do Par{\'a}} 
                         and {Universidade Federal Rural da Amaz{\^o}nia (UFRA)} and 
                         {Pacific Northwest National Laboratory} and {Universidade Federal 
                         do Amap{\'a} (UFAP)} and {Universidade Federal do Amap{\'a} 
                         (UFAP)} and {Instituto Nacional de Pesquisas Espaciais (INPE)} and 
                         {University of Washington}",
                title = "The influence of tides on biogeochemical dynamics at the mouth of 
                         the Amazon River",
            booktitle = "Proceedings...",
                 year = "2017",
         organization = "AGU Fall Meeting",
             abstract = "Rivers supply the world's oceans with sediments and dissolved 
                         material that shape the coastline and drive elemental cycles. Most 
                         estimates of the flux of material from rivers to the ocean are 
                         based on measurements made upstream of any tidal influence on 
                         river flow. For large rivers, the region where tides alter flow 
                         but do not introcuce salty marine waters represent a large gap in 
                         our knowledge and quantification of aquatic processes such as 
                         carbon cycling. In the case of the Amazon River, this gap 
                         represents a reach of the river that is nearly 1,000 km long. 
                         Here, we performed a series of measurements at the mouth of the 
                         Amazon River to determine variability in geochemical parameters 
                         throughout tidal cycles. Suspended sediment concentrations were 
                         directly linked with river velocity, with the lowest levels 
                         observed during river flow reversal (i.e. incoming tide) and the 
                         highest levels observed at outgoing tide with max river velocity. 
                         Other parameters such as the concentration of carbon dioxide 
                         showed a similar relationship with river velocity, suggesting that 
                         biological activity also responds to changing flow conditions. 
                         These results suggest that tidal river dynamics need to be 
                         considered when evaluating mass flux from large rivers.",
  conference-location = "New Orleans",
      conference-year = "11-15 Dec.",
             language = "en",
           targetfile = "ward_influence.pdf",
        urlaccessdate = "28 abr. 2024"
}