An emerging new vulnerability to Earth’s food system has been discovered (University of Oxford). In a new study, “scientists show how specific wave patterns in the jet stream strongly increase the chance of co-occurring heatwaves in major food producing regions of Northern America, Western Europe and Asia. Their research finds that these simultaneous heatwaves significantly reduce crop production across those regions, creating the risk of multiple harvest failures…..We found a 20-fold increase in the risk of simultaneous heatwaves in major crop producing regions when these global scale wind patterns are in place.” The warming climate—due to greenhouse gas emissions—is held responsible for the jet stream’s change of behavior.
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An assessment of 78 of Earth’s mountain-glacier based water systems shows that one quarter of the global population is vulnerable to serious losses of supply (Chinese Academy of Sciences). This important study was conducted by 32 scientists from around the world, who analyzed each system in thorough detail and ranked its importance. Asian populations were found to have by far the greatest exposure. Climate change is a critical factor, whereby the temperatures at high altitudes that cause glacial melting are rising at rates well above the global average.
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A different study reviews the general outlook for tropical glaciers across the Pacific hemisphere (Ohio State University). This story features commentary from one of the authors, the venerable explorer Lonnie Thompson, who is the world’s foremost expert on tropical glaciers. Glaciers on a mountain on the island of New Guinea could be gone within ten years, and others are sure to follow. El Nino events, amplified by global warming, are an important factor.
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Storm damage from large hail is increasing in the US, due to changing environmental conditions that are probably linked to rising temperatures (University of Albany). Researchers have come to these conclusions after gathering information from 38 years of weather data across the nation.
–The study has open access, containing charts and maps that better display how trends are developing and where the greatest impacts are being experienced.
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Is shale gas development worth the cost? (Pittsburgh Post-Gazette). A Carnegie Mellon study has looked at the trade-offs involved from the standpoint of regional economics, and sees such development as a bad deal for the states of Pennsylvania, Ohio and West Virginia. While there are direct employment benefits that are popular, “the study found that the cumulative impacts of natural gas development on water and air quality, ecosystem, climate, labor markets and public health “are still largely unexplored and unaccounted for in public and private decision-making”….. the study recommends a production tax of $2 for every 1,000 cubic feet of gas to account for air quality and climate change impacts.”
–Also, venting and flaring of natural gas at oil well sites, which has many harmful effects, has increased dramatically in two other states, North Dakota and Texas (Axios).
https://www.axios.com/natural-gas-milestone-oil-well-sites-a6b499ed-2d62-4c67-a133-f2126b762308.html
Carl