Temporary carbon storage leaves longer traces in the simulated ocean
Temporarily keeping carbon out of the atmosphere reduced some slow climate changes even after its release in idealized simulations. The single peer-reviewed modelling study followed ocean heat, carbon uptake, thermal expansion and other responses. Some effects persisted into longer simulations, with the largest benefits alongside strong permanent emissions cuts. The result distinguishes the duration of carbon storage from the different adjustment times of climate components.
Science··Evening
The ocean retains part of the simulated benefit
Keeping carbon outside the atmosphere for a limited interval reduced some changes in ocean heat, ocean carbon and thermal expansion in climate simulations. Part of the effect remained after release. The single peer-reviewed study used an Earth system model developed at the University of Victoria, with intermediate complexity. It compared idealized removal and release experiments across different emissions paths, examining the climate components that adjust more slowly than atmospheric temperature.[1]
The amount stored and the duration both matter
By 2100, avoided changes in several components tracked carbon storage-years: the amount held multiplied by the time it stayed outside the atmosphere. Temperature peaked lower on low-emissions paths that subsequently cooled. Under continuing high emissions, temporary storage instead postponed the warming increase. After carbon was released, much of the temperature difference disappeared by the end of the century. The analysis also counted avoided warming accumulated over time, rather than only the final temperature.[1]
Longer runs separate the climate responses
Experiments extending to 2300 retained the storage-years relationship for ocean heat, carbon and thermal expansion, while Atlantic overturning circulation behaved differently and permafrost depended on the scenario. The largest benefits accompanied strong permanent emissions reductions. The model simplified atmospheric circulation while changes in land reflectivity and some effects of other gases lay outside its scope. These are modelled responses to specified storage experiments, without a verified benefit assigned to an individual land project.[1]
