“How humans derailed the Earth’s climate in just 160 years” (The Conversation). Two young French scientists have written an article that serves as an outstanding tutorial on the basics of the carbon cycle and how it has operated over much of Earth’s history. They go on to clearly point out the sheer magnitude of human interference with the natural cycles and what it means for the future. “It is not the planet that is at stake. Instead, it is the future of human societies and the preservation of current ecosystems…..the Earth sciences cannot provide solutions…..they can and must contribute to knowledge and collective awareness of the current global warming.” (Collective awareness may require some amount of education that goes beyond everyday sound bites, as this story provides.)
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The conservative nature of IPCC reports has been thoroughly analyzed in a scientific study (Climate Code Red). The regular IPCC emphasis on establishing degrees of uncertainty is something that many climate scientists have complained about for years. This is the first real attempt to back up that complaint with statistical evidence. According to the lead author, “…. climatic uncertainties are nothing but an expression of the climate risks we face, and should inspire action rather than indifference…..Our evolutionary history tells us Earth will ultimately survive more aridity, more hurricanes, more floods, more sea-level rise, more extinctions and degraded ecosystems, but our society as we know it today might not unless we clearly articulate the magnitude of the threat it poses.” By coincidence, that statement certainly ties in well with the views given in the story above.
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The very sad state of present day life in Mongolia (BBC News). “The country has already warmed by 2.2 degrees, forcing thousands of people to abandon the countryside and the traditional herding lifestyle every year for the smog-choked city where 90% of children are breathing toxic air every day.” The climate is changing in weird and unpredictable ways, and city air pollution is among the worst in the world, all captured poignantly in the video.
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New research describes a greatly increased rate of damage to tropical forests from hurricanes. “Hurricane Maria not only destroyed far more trees than any previously studied storm, big, old trees thought to be especially resistant to storms suffered the worst…..These hurricanes are going to kill more trees. They’re going to break more trees. The factors that protected many trees in the past will no longer apply…..Forests will become shorter and smaller, because they won’t have time to regrow, and they will be less diverse.”
https://phys.org/news/2019-03-hurricane-maria-future-climate-driven-storms.html
https://phys.org/news/2019-03-hurricane-maria-future-climate-driven-storms.html
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An advanced research study has been published about prospects for glacial calving and slumping. One of the authors is well-known Arctic scientist Richard Alley, who describes how slumps can speed up the process of ice sheet collapse and has spotted potential candidates. Alley says regular calving events happen relatively slowly, such as when the ice front melts over time, undercutting the ice and weakening the cliff. “But that’s not going to go really, really, really fast because you have to wait for the melting to undercut it…..With slumping, the calving occurs without waiting for the melt. We’ll go slump… basal crevasse… boom…..The scary thing is that if pieces of west Antarctica start doing what Helheim is doing then over the next hundred years models indicate that we get rapid sea level rise at rates that surpass those predicted.”
Carl