Metrics to assess the mitigation of global warming by carbon capture and storage in the ocean and in geological reservoirs

Details Metrics to assess the mitigation of global warming by carbon capture and storage in the ocean and in geological reservoirs Metrics to assess the mitigation of global warming by carbon capture and storage in the ocean and in geological reservoirs

Sep 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004georl..3118202h&link_type=abstract

Geophysical Research Letters, Volume 31, Issue 18, CiteID L18202

Mathematics

Logic

3

Global Change: Climate Dynamics (3309), Global Change: Biogeochemical Processes (4805), Global Change: Atmosphere (0315, 0325), Atmospheric Composition And Structure: Constituent Sources And Sinks

Scientific paper

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 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.

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