Human Impact on CO2 Levels in the Changjiang River
Author Information
Author(s): Wang FuShun, Wang Yuchun, Zhang Jing, Xu Hai, Wei Xiuguo
Primary Institution: Shanghai University
Hypothesis
How have human activities affected the CO2 degassing flux in the Changjiang River over the past decades?
Conclusion
Human activities have significantly reduced the CO2 degassing flux from the Changjiang River by approximately 75% since the 1960s.
Supporting Evidence
- The average CO2 diffusing flux to the atmosphere from the river decreased by three-fourths from the 1960s to the 1990s.
- Approximately 15.3 Mt of carbon was degassed annually into the atmosphere from the entire Changjiang drainage basin in the 1990s.
- Dissolved CO2 concentration in the Changjiang has shown a declining trend since the 1960s.
Takeaway
People have changed the Changjiang River a lot, which has made it release much less carbon dioxide into the air than it used to.
Methodology
The study analyzed historical monitoring data from hydrographic gauges to evaluate changes in dissolved CO2 and silicate concentrations in the river.
Potential Biases
Potential biases may arise from the reliance on historical monitoring data and changes in measurement methods over time.
Limitations
The study relies on historical data, which may lack detailed quality assurance.
Statistical Information
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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