New information about Earth’s climate history from two million year old ice cores (Princeton University). “Gas bubbles trapped in the cores — which are the oldest yet recovered — contain pristine samples of carbon dioxide, methane and other gases that serve as “snapshots” of prehistoric atmospheric conditions and temperatures.” The research found no evidence of CO2 levels being higher than about 300 ppm over that entire period, which has been marked by a constant pattern of advancing and retreating glacial ice cycles.
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A picture of how all parts of the globe heated up during the month of October, and more (Dan’s Wild Wild Science Journal). Dan is a meteorologist with 32 years of experience, and a passion for Earth Science. I especially liked his second chart, which shows how the course of global temperatures has developed over the last 11,000 years. We were well on the way toward a new ice age until the last two centuries came along.
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New sources of data show the relative importance and rapid growth of CO2 emissions from cement production (Earth System Science Data). The processing of cement, known as “carbonate decomposition” releases prolific amounts of CO2, exceeded only by the burning of fossil fuels and land use changes, including deforestation, with respect to human activity. Emissions have grown faster than fossil fuels for the last two decades, now at a rate equal to four percent per year by comparison—or, in terms of gigatonnes, 1.5 to 37.5.
Is the current fire season in Australia without precedent? (The Guardian). The continent has a long history of devastating bushfires, leading to controversy over whether this one is the worst. When all available information is put together it’s clear that this year wins, and climate change offers the best reason why. Moreover, “I guess the most concerning thing to emphasise is it’s not over. We’re not even into summer yet.”
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When people change their lifestyle by cutting consumption, in order to build a healthier planet, can they be better off as a result? (Norwegian University of Science and Technology). A scientific study was designed to find answers to this question, and the results are encouraging. Here is the title to the study: “Happier with less? Members of European environmental grassroots initiatives reconcile lower carbon footprints with higher life satisfaction and income increases.” You can read all about it in this post.
Carl