A new report provides long-term perspectives on Earth’s climate history. In general, as the sun’s has steadily grown stronger greenhouse gases have fluctuated between extremes, most recently a low extreme that is in the process of being reversed at an extreme rate of change. In this post the authors of the report explain the meaning of their work in everyday language. The capabilities are in place for setting temperature highs that have been unknown for at least the last 500 million years.
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–Here is a link to the full report, which includes historical charts based on the latest accumulation of available information:
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The carbon budget has been updated to reflect the emission results for 2016. Many different scenarios can be seen and compared in one graph. Note how it is all based on “years of current emissions.” Whenever the emission number drops more years can be added to the deadline—or vice versa. There is really no reason to have hopes for staying under 1.5C, but 2.0C is still a good target if the pace of action is considerably stepped up. That is exactly what the oil companies are trying to prevent through their political manipulation effort, which is not doing badly in some places.
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Decarbonization is about much more than fossil fuels. How we treat the use of land is of major importance because of the way carbon-loaded biomass is added or subtracted, This post from the World Resources Institute brings that situation up to date, especially showing how many necessary reforms have yet to be achieved.
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There is new information about the amount of carbon stored in the world’s peatlands—far more than estimated (Yale E360). “…field researchers have so far only scratched the surface of the underground peat reserves and the enormous carbon storehouse they represent.” This is especially so in the tropics, where the carbon is vulnerable to quick release because of ongoing cultivation projects.
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Estimates have been raised for the amount of carbon released by the production of Canada’s oil sands. There are implications for pipeline assessments as well as the direct effect on climate conditions.
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How drought is affecting 3 million residents who live in the northern parts of Kenya:
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