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IPCC2007: Science for Policymakers

IPCC2007: Science for Policymakers. Acidification of ocean. ADCC. Black =observed Simulations Blue= natural forcings due to solar activity and volcanoes ONLY; 19 sim’ns from 5 climate models Red = both natural AND anthropogenic forcings 58 sim’ns from 14 climate models.

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IPCC2007: Science for Policymakers

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  1. IPCC2007: Science for Policymakers

  2. Acidification of ocean ADCC

  3. Black =observed Simulations Blue=natural forcings due to solar activity and volcanoes ONLY; 19 sim’ns from 5 climate models Red = both natural AND anthropogenic forcings 58 sim’ns from 14 climate models. 5–95% confidence ranges shaded

  4. Atmosphere-Ocean General Circulation multi-Model average projections for the B1 (top), A1B (middle) and A2 (bottom) SRES scenarios 1980-99 vs 2020-29 vs 2090-99 IPCC Sc/Pkrs 2007

  5. Dec-Jan-Feb % rainfall change, for SRES A1B 2090-99 vs 1980-99 Multiple simulations White=> mixed results Stippled=> sign agreed June-July-Aug IPCC ScPkrs 2007

  6. IPCC AR4 Impacts SPM

  7. Spring flowers One of several figures from the (see go/px272 for online access)

  8. Climate sensitivity of key staple crops

  9. IPCC2007:Changes in temperature, sea level, northern snow cover

  10. Vulnerability of W Antarctica Ca 70m sleq total Ca 6m sleq possibly vulnerable

  11. Sea level rise particularly underpredicted (note measurement change at 1993: tide gauges -> satellite data) Science 2007 (DOI: 10.1126/science.1136843)

  12. Increased vulnerability of coastal deltas to flooding IPCC AR4 Impacts TS

  13. Thermohaline reduction vs T rise ADCC 2007

  14. California

  15. Under-prediction of rise by previous IPCC reports.Solid=actual Science 2007 (DOI: 10.1126/science.1136843)

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