IMO 2020 and Beyond
The International Maritime Organization mandated a reduction in the maximum sulphur content of marine fuels from 3.5% to 0.5% globally in 2020. This dramatically cut SOx emissions, but shipping still accounts for nearly 3% of global anthropogenic CO2.
Slow Steaming Emission Reductions
Data & Modeling
| Fuel Type | Carbon Intensity (g CO2/MJ) | Sulphur Content |
|---|---|---|
| Heavy Fuel Oil (HFO) | ~76 | Up to 3.5% |
| Very Low Sulphur (VLSFO) | ~74 | < 0.5% |
| Green Methanol | ~0-15 (Lifecycle) | 0% |
Common Misconceptions
A frequent error in media interpretation is confusing localized transient effects with global secular trends. The figures demonstrated here isolate the multi-decadal signal from seasonal noise.
Frequently Asked Questions
Is this reversible?
On human timescales, highly unlikely. The thermal inertia of the ocean means impacts will persist for centuries even if emissions cease immediately.
How accurate are these figures?
Based on the latest AR6 synthesis and prevailing primary literature. Uncertainties are inherent in coupled non-linear climate models.