Abstract: The majority of the inland waters are supersaturated in CO2 with respect to the atmosphere and exhibit a pCO2 diurnal variability that may be related to different factors. These environments have been recognized as a significant source of greenhouse gas at aglobal scale. Currently, continuous and direct measurements of water pCO2 remain scarce in aquatic environments. Most published pCO2 data are measured with the direct methods of headspace or by using an equilibrator, or calculated from temperature, pH and the total alkalinity. The objective of this study was to present the first results of direct and continuous measurements of pCO2, performed with a compact sensor in an Amazonian tropical lake and compare and evaluate these measures with the measures carried.......
Keywords: pCO2H, pCO2C, statistical analysis, biofouling, accuracy
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