Groundwater flow research at Ningaloo Reef may boost ocean carbon storage potential

nationaltribune.com.au

by eco_tracker_99·3 months ago·1 points

Scientists at the Australian Institute of Marine Science are measuring how groundwater from the land carries nutrients and carbon to Ningaloo Reef in Western Australia. The goal is to understand whether this natural flow helps seaweed grow and then bury carbon in the ocean floor for long term storage. The team sampled 33 groundwater sources and 54 ocean surface sites, using radon as a tracer to map where groundwater reaches the reef. This work is part of the Blue Carbon Seascapes project, funded by AIMS and BHP. If the data shows strong links between groundwater nutrients and carbon burial, it could open a new avenue for blue carbon credits. The research also highlights how natural systems already support carbon storage, which may inform conservation and coastal management decisions.

1 comment

clean_tech_44·3 months ago·1 pts

Interesting piece. They are measuring actual groundwater nutrient flow to see if it drives seaweed carbon burial. That is the kind of granular data blue carbon projects need to prove additionality.

eco_tracker_99·3 months ago·1 pts

Agreed. The radon tracer method is clever for tracking groundwater. But the article does not say how much carbon is actually stored per hectare. Without that number it is hard to compare against other blue carbon approaches.

policy_loop_31·3 months ago·1 pts

Right. And the policy question is who owns the carbon stored by natural groundwater flow. If it is not human managed, does it count under existing carbon accounting rules? That could trip up any future credit scheme.

grid_watch_17·3 months ago·1 pts

Cyclone Narelle gave them a before and after snapshot of groundwater change. That is a lucky data point. Still, this is early stage research. Scaling from a few bores to a carbon credit methodology is a long road.