Articles | Volume 16, issue 3
Research article
04 Feb 2019
Research article |  | 04 Feb 2019

Gas transfer velocities of CO2 in subtropical monsoonal climate streams and small rivers

Siyue Li, Rong Mao, Yongmei Ma, and Vedula V. S. S. Sarma

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Cited articles

Abril, G., Bouillon, S., Darchambeau, F., Teodoru, C. R., Marwick, T. R., Tamooh, F., Ochieng Omengo, F., Geeraert, N., Deirmendjian, L., Polsenaere, P., and Borges, A. V.: Technical Note: Large overestimation of pCO2 calculated from pH and alkalinity in acidic, organic-rich freshwaters, Biogeosciences, 12, 67–78,, 2015. 
Alin, S. R., Rasera, M., Salimon, C. I., Richey, J. E., Holtgrieve, G. W., Krusche, A. V., and Snidvongs, A.: Physical controls on carbon dioxide transfer velocity and flux in low-gradient river systems and implications for regional carbon budgets, J. Geophys. Res.-Biogeo., 116, G01009,, 2011. 
Alshboul, Z. and Lorke, A.: Carbon Dioxide Emissions from Reservoirs in the Lower Jordan Watershed, PLoS One, 10, e0143381,, 2015. 
Beaulieu, J. J., Shuster, W. D., and Rebholz, J. A.: Controls on gas transfer velocities in a large river, J. Geophys. Res.-Biogeo., 117, G02007,, 2012. 
Bodmer, P., Heinz, M., Pusch, M., Singer, G., and Premke, K.: Carbon dynamics and their link to dissolved organic matter quality across contrasting stream ecosystems, Sci. Total Environ., 553, 574–586,, 2016. 
Short summary
We provide a first determination of k in human-impacted subtropical streams and small rivers. High and highly variable k values reflect different controls on water turbulence. New models of k are developed using water depth and flow velocity. We show that previous estimates of riverine CO2 evasion from subtropical streams and small rivers are conservative and highlight the importance of incorporating scale-appropriate k measurements into extensive pCO2 investigations for accurate C budgets.
Final-revised paper