Climate science challenge: What is the counterpoint to this skeptical criticism? 'Mikes Nature Trick' Revisited- @ScottAdamsSays edition https://wattsupwiththat.com/2019/01/21/mikes-nature-trick-revisited-scottadamssays-edition/ … via @WattsUpWithThat
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The Greenland and Vostok ice cores are relatively reliable (at last compared to tree rings). They measure ratio of Oxygen isotopes which is a signature for temperature. Also deep ocean sediment cores which do likewise for small organisms. You get a rough idea.
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No, that's not what I said. In deep time, I think that alkenone ocean data gives convincing information on temperature change over past 12 million years (10-15 deg C decrease at 45S, 45N). Polar dO18 at sites with least possible elevation change seems convincing.pic.twitter.com/LtA7yfksvn
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How about for the last couple thousand years, a record that matches what satellites tell us of that last 40 years?
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Another clue to prehistorical temperatures is treeline studies. 1,000 years ago treeline were farther north and higher up mountainsides than they are today.
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Another clue is Arctic driftwood studies on beaches that are currently locked in with ice on the shores of Greenland and the Canadian Arctic Archipelago.
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