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Updated: Jul 6, 2026

Measuring Carbon-based Contaminant Mineralization Using Combined CO2 Flux and Radiocarbon Analyses

Measuring Carbon-based Contaminant Mineralization Using Combined CO2 Flux and Radiocarbon Analyses

Published on: October 21, 2016

Dinámica espaciotemporal, fuente y flujo de carbono negro disuelto en el sistema del río Yangtsé influenciado por el

Chongtai Chen¹, Xinyi Liu¹, Guopei Huang²

¹College of Oceanography and Ecological Science, Shanghai Ocean University, Shanghai 201306, China.

|December 21, 2025

Abstract:

The Yangtze River is the most important source of dissolved black carbon (DBC) for the East China Sea. However, knowledge regarding the source, fluxes, and fluvial transport of DBC in the Yangtze River is lacking, due mainly to the seasonal influences of the East Asian monsoon. To fill this knowledge gap, we measured DBC in water samples collected in the whole river under different hydrological conditions. In 2023, the DBC flux in the Yangtze River was significantly lower before the rainy season (3.29 Gg C per month) than after the rainy season (5.38 Gg C per month). By comparing the concentrations and condensation degree before and after the rainy season, it was found that the significant increase in DBC flux mainly originated from the contribution of midstream soil carbon pools, which characterized by highly condensate DBC. Finally, we estimated the total annual DBC flux of the Yangtze River to be 53.22 Gg C in 2023. This study quantified the significant contribution of the soil carbon pool to the Yangtze River DBC pool (74.39 %). Greater attention should be paid to the impact of soil erosion and hydrology conditions variations on the DBC within terrestrial-aquatic continuums.

Palabras clave:

carbono negro disuelto flujo variaciones hidrológicas estacionales erosión del suelo el río Yangtsé

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