Metrics to Assess the Mitigation of Global Warming by Carbon Capture and Storage
Date: Friday, September 30 @ 11:30:00 MDT
Topic: Impacts of High CO2 on Ecosystems
by Peter Haugan
Different metrics to assess
mitigation of global warming by carbon capture and storage are discussed. The
climatic impact of capturing 30% of the anthropogenic carbon emission and its
storage in the ocean or in a geological reservoir are evaluated for different
stabilization scenarios using a reduced-form carbon cycle-climate model. The
accumulated Global Warming Avoided (GWA) remains, after a ramp-up during the
first ~50 years, in the range of 15 to 30% over the next millennium for deep
ocean injection and for geological storage with annual leakage rates of up to
about 0.001. For longer time scales, the GWA may approach zero or become negative
for storage in a reservoir with even small leakage rates, accounting for the CO2
associated with the energy penalty for carbon capture. For an annual leakage
rate of 0.01, surface air temperature becomes higher than in the absence of
storage after three centuries only.
Link to Abstract
Link to Slides
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