Awuna geothermal gradient

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Borehole temperatures from the Awuna site in Alaska (blue dots) show a pronounced kink in the geothermal gradient consistent with a recent (last few decades) heating of >2 °C. The dashed gray line shows what the geothermal gradient would look like in the absence of this warming. Data available at
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Uploaded: Dec10 14

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Kirsten Menking, Vassar College
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