Dinâmica do Carbono Inorgânico Dissolvido nos Rios Teles Pires e Cristalino na Bacia Amazônica

Authors

  • Higo José Dalmagro Pós-graduação em Física e Meio Ambiente/Universidade Federal do Mato Grosso
  • Kelli Cristina Aparecida Munhoz Universidade do Estado de Mato Grosso/UNEMAT
  • Maria de Fátima F. Lamy Rasera Centro de Energia Nuclear na Agricultura/CENA
  • Cleber Ibraim Salimon Universidade Federal do Acre/UFAC
  • Alex Vladimir Krusche Centro de Energia Nuclear na Agricultura/CENA
  • Cristiane Akemi Umetsu Universidade do Estado de Mato Grosso/UNEMAT
  • Rosalvo Duarte Rosa Universidade do Estado de Mato Grosso/UNEMAT
  • Ricardo Keichi Umetsu Universidade do Estado de Mato Grosso/UNEMAT
  • Leandro Gomes Almeida Universidade do Estado de Mato Grosso/UNEMAT
  • Vanessa Aparecida Santos Universidade do Estado de Mato Grosso/UNEMAT
  • Luciana Sanches Pós-graduação em Física e Meio Ambiente/Universidade Federal do Mato Grosso
  • José de Souza Nogueira Pós-graduação em Física e Meio Ambiente/Universidade Federal do Mato Grosso

DOI:

https://doi.org/10.5902/2179460X9880

Abstract

The rivers are extremely important in the carbon cycle, either inthe CO2 out gassing flows or carbon exporters to the oceans. Directmeasuring of CO2 exchanges between the terrestrial ecosystems and theatmosphere should consider the aquatic systems flows, not overestimatingthe carbon terrestrial accumulation. The Amazon basin has the largest andmore complex system of fresh water in the world, so that it holds animportant in the global carbon cycle. The objective of this work was toevaluate, during the period between September 2004 to August 2005, thedynamics of the Total Dissolved Inorganic Carbon (DIC) and fractions(dissolved CO2 + HCO3 - + CO32 -), in the waters of Teles Pires andCristalino rivers, components of the Amazon basin, in the district of AltaFloresta, MT. Fortnightly were determined DIC concentration, pH andtemperature of the rivers. Based in those results and applying thethermodynamic balance equations, it was possible to estimate the pCO2and the carbonate system fractions. The rivers presented a seasonal variationin the pH values, being closer to the neutrality in the drought period. Theconcentration of HCO3- was significantly larger in the drought than duringthe flood season. Both studied rivers were oversaturated in CO2 related tothe atmosphere.

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Published

2007-12-10

How to Cite

Dalmagro, H. J., Munhoz, K. C. A., Rasera, M. de F. F. L., Salimon, C. I., Krusche, A. V., Umetsu, C. A., Rosa, R. D., Umetsu, R. K., Almeida, L. G., Santos, V. A., Sanches, L., & Nogueira, J. de S. (2007). Dinâmica do Carbono Inorgânico Dissolvido nos Rios Teles Pires e Cristalino na Bacia Amazônica. Ciência E Natura, 29(2), 115–127. https://doi.org/10.5902/2179460X9880

Issue

CIÊNCIA E NATURA, V. 29, N. 2, 2007

Section

Physics

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