Durability
The ability of stored carbon to withstand reversal and remain sequestered over time.
What is Durability?
Durability, in the context of carbon removal, refers to the stability and resilience of the carbon storage mechanism against reversal. It addresses how well the sequestered carbon can resist being released back into the atmosphere due to natural processes (like decomposition or wildfires) or human activities.
Why is Durability important?
Durability is a key aspect of permanence and is crucial for ensuring the long-term climate benefit of carbon removal. Without durable storage, even if carbon is initially removed, its eventual release back into the atmosphere would diminish or negate the climate impact, making investments in such projects less effective.
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Frequently asked questions
Durability focuses on the inherent resistance of the storage mechanism to reversal, while permanence refers to the overall duration of storage. They are closely related, with higher durability contributing to greater permanence.
Factors enhancing durability include the choice of storage method (e.g., geological storage for high durability), careful site selection, robust monitoring, and management practices that mitigate risks like fire, disease, or land-use change.
Yes, durability is a concern for all carbon removal methods, although the specific risks and challenges vary significantly between natural (e.g., forests) and technological (e.g., DAC with geological storage) approaches.