December 5, 2025Scientific ReportsOpen Access

High-frequency monitoring reveals a CO2 source-sink shift in a subtropical eutrophic urban lake

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High-frequency analysis highlights carbon source-sink shifts in urban lakes, indicating the role of eutrophication.

Consistent daytime declines in pCO2 were observed across 12 sampling days, indicating complex carbon dynamics.
Annual mean pCO2 levels reached 1789 µatm, with significant seasonal variations affecting carbon exchange.
Analysis of key regulators like pH, chlorophyll a, and dissolved oxygen linked to carbon shifts in urban lakes.
Findings call for targeted strategies to enhance carbon sequestration and mitigate pollution effects in these ecosystems.

Chen et al. (2025) studied this question.

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