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Big Bear Solar Observatory

Big Bear Solar Observatory. Philip R. Goode Big Bear Solar Observatory New Jersey Institute of Technology. Irradiance Changes Blue curve is solar cycle Red curve adds purported long-term variation Temperature changes from NCAR model Yellow line limit from physics of irradiance change.

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Big Bear Solar Observatory

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  1. Big Bear Solar Observatory Philip R. Goode Big Bear Solar Observatory New Jersey Institute of Technology

  2. Irradiance Changes • Blue curve is solar cycle • Red curve adds purported long-term variation • Temperature changes from NCAR model • Yellow line limit from physics of irradiance change Big Bear Solar Observatory

  3. Origin of Sun’s Variable Output • Seismic data from SoHO/MDI provide most precise measure of solar variability • Physical picture is that rising solar activity blocks heat and convective flows, while corregating the solar surface making it a more effective radiator • Active sun is cooler, corregated, slightly smaller and more irradiant • Inactive sun is warmer, smoother, slightly larger and minimally irradiant Big Bear Solar Observatory

  4. Implications of Limit • Earth is responding to more subtle changes in Sun, which imprint the solar cycle and longer term wanderings of solar activity • Changes in solar wind induces some unknown changes at the Earth • A new burden on the climate models Big Bear Solar Observatory

  5. Earthshine Plus ISCCP Conclusions • Earth’s Reflectance has increased over the last five years • Clouds have re-arranged themselves in the same period so that their net cooling effect is reduced. • Earth can warm with less sunlight Big Bear Solar Observatory

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