CO dynamics in a small and old subtropical reservoir in East Asia: Environmental controls driving seasonal and spatial variability.

Inland waters have been increasingly viewed as hotspots for greenhouse gas (GHG) emissions owing to their strong capability to intercept and mineralize carbon from the terrestrial environment. Although small waterbodies in humid subtropical climates have the potential to emit considerable amounts of GHG, their emission patterns have remained understudied. This study involved intensive measurements of carbon dioxide (CO) emissions from a small reservoir and its upstream and downstream reaches located in subtropical Hong Kong.