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CO2 Lag
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Does CO2 Lag behind warming and climate change in the natural cycle? Yes. Is it lagging today? No. CO2 normally lags in the natural cycle unless some abnormal perturbation occurs. If we were in the natural cycle, CO2 levels would be around 280ppm. We are now over 387ppm and therefore CO2 is now leading in our current warming scenario, above natural cycle.
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Global Warming
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Myths vs. Facts: Global Warming
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40's to 70's cooling, CO2 rising?
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This is a fascinating denialist argument. If CO2 is rising, as it was in the 40's through the 70's, why would there be cooling?
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Global Warming
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Myths vs. Facts: Global Warming
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Global Warming Stopped in 1998
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Global warming denialists like to say that global warming stopped in 1998. Is it true? No. The warming trend continues. To understand this, one needs to understand that there is a difference between weather and climate. Weather is short term and climate is long term. The long term trend is clear. We are continuing to warm.
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Myths vs. Facts: Global Warming
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Global Cooling Myth in the 70's
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Many claim that in the 1970's all scientists believed the earth was cooling. Factual examination of the controversial report reveals that there was a consensus. The consensus was we don't know enough yet. The confirmation of the Milankovitch cycles indicated that we were to begin a cooling phase, the introduction of industrial greenhouse gases indicated we could interrupt the natural cycle. More study was needed.
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Myths vs. Facts: Global Warming
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Models Can Be Wrong
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It's a common mistake people make... the point is not that models 'can' be wrong. The point is models are 'always' wrong. But that does not mean that they are not relevant and useful for understanding how things work.
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Myths vs. Facts: Global Warming
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Global Warming Natural Cycle
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The idea that Global Warming is a natural cycle is well understood from paleo data covering the past 1 million years. Is there a difference between current climate, and the natural cycle? For the past million years the natural climate has oscillated between warm periods and ice ages. This shifting in and out of warm periods and ice ages is correlated strongly with Milankovitch cycles. In order to understand the difference between natural cycle and human-caused/influenced global warming, one needs to consider changes in radiative forcing and how this affects systems on Earth such as the atmosphere, vegetation, ice and snow, ocean chemistry and ocean heat content overturn cycles and related effects. The current radiative forcing levels are clearly outside of the natural cycle range.
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Environment
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Global Warming
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Medieval Warm Period
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Was the earth warmer during the 'Medieval Warm Period' than now? No. Regional temperatures do not represent the global temperature. The Medieval Warm Period (MWP) temperature graphs that people use to claim otherwise, do not represent the global average temperature.
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Myths vs. Facts: Global Warming
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Ocean Cooling
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Did the ocean actually start cooling and global warming stop? The data showed that the Atlantic had gone cold. But the scientist that was looking at the data knew that the inertia of the system should not allow such a thing to happen. But there it was... in the data. Knowing the models and the forces involved he did some more investigating and found something... he looked at his wife and said "Oh, no,". What's wrong?" his wife asked? He replied, "I think ocean cooling isn't real."
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Myths vs. Facts: Global Warming
