recent study in Science Advances reveals that trees may store less carbon than climate models suggest. Researchers found that photosynthesis and wood A growth decouple during dry, hot conditions. While trees continue absorbing carbon dioxide, wood growth ceases months early, meaning less carbon is locked away permanently.

A recent study in Science Advances reveals that trees may store less carbon than climate models suggest. Researchers found that photosynthesis and wood growth decouple during dry, hot conditions. While trees continue absorbing carbon dioxide, wood growth ceases months early, meaning less carbon is locked away permanently. 

Key Takeaways from the Research

The Disconnect:-

 Current climate models assume photosynthesis directly dictates wood growth. However, in oak forests, growth stopped by mid-summer despite late-year photosynthesis. 

Impact of Heat: -

Under hot and arid conditions, tree growth halts almost instantly, while photosynthesis continues at a slower rate. 

Carbon Destination: -

Instead of building wood, the absorbed carbon is used for shorter-term processes like foliage or internal metabolic functions. 

Sink Overestimation: -

Because the carbon is not locked away in durable wood, forests may serve as a less robust long-term carbon sink than scientists previously expected. 

What This Means for Climate Action

Emissions Reality Check:-

 Nature-based solutions like tree planting remain vital, but they cannot offset fossil fuel emissions at the scale previously hoped.

Model Updates: -

Climate scientists must adjust long-term Earth system models to account for this decoupling effect.

Trees may store less planet-heating carbon than hoped, study suggests

    Trees may not be able to store as much planet-heating carbon as hoped, a study suggests, with researchers finding photosynthesis does not always lead to wood grow.

MJF Lion ER YK Sharma