A new international study provides reasons to worry about substantial crop losses as temperatures rise. “For every single day the temperature remains above 30°C, they find, maize and soya plants can lose about 5% of their harvest. But that is only the start.” Countries that heavily rely on imported grain are likely to suffer the most.
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Will global temperature change stay below the 2C limit? This lengthy and quite meaty story from the Guardian makes it quite clear that large numbers of leading scientists do not think so. Many think it is still theoretically possible, but the practical steps required of human behavior are almost beyond rational expectations. Some say we have already locked in 2C no matter what, as built-in inertia factors unfold.
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Effects from potential “tipping points” are generally not included in climate models. They are known to exist, but cannot be reliably predicted in terms of quantity or timing. Some of the effects, if soon realized, could eat into the carbon budget that has otherwise been reserved for humans. “In general, climate models are too stable…..They are calibrated to the present climate, have difficulty simulating the abrupt changes we have witnessed in the geological past.”
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New data concerning the threat of extinction among primate species. About 60% of the 500 species of humanity’s closest relatives are threatened, with climate change listed as one of the reasons. “Calling primates the “canary in the coal mine,” Garber said that humans will eventually also not be able to live where primates are having trouble surviving now if “we continue to pollute the environment.”
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The coastline of Louisiana is rapidly disappearing due mostly to sea level rise, with an area the size of Delaware already gone. The current plan for remediation will require an investment of more than $50 billion over 50 years.
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New information about seafloor topography under the glaciers fronting Antarctica’s Amundsen Sea. Pathways for warm water intrusion are confirmed, but the melting process could be slowed down by other features.
Carl