A different kind of El Nino is happening in the Pacific. It is different because the heat build-up is in the center of the ocean, along the equator, rather than close to the coast of Peru which is normally the case. Most of the directly associated rainfall is also appearing out in the center of the ocean. This is a weak type of El Nino—probably deserving a different name of its own—and one might suppose it will be unlikely to have much of an effect on global temperature averages for the year.
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A new study has interesting things to say about Earth’s climate history over the last billion years. The researchers have found new reasons behind the onset and conclusion of major glacial eras, linked to plate tectonics and the geological cycling of atmospheric CO2. “Earth has a long-running carbon sequestration program…..We know that these processes keep Earth’s climate in balance, but determining what causes shifts between non-glacial and glacial climates on million-year timescales is a long-standing puzzle…..Unfortunately for Earth’s future, the geologic processes that consume CO2 are slow and unable to contend with the massive CO2 emissions that result from the burning of oil, coal and natural gas.”
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Can greenhouse gas emissions be reduced to zero by 2050? (Story by Deutsche Welle) The Energy Watch Group, working with a Finnish university, has published the first detailed global energy scenario showing how it can be done. “This energy system costs less than our current one and ensures that global warming remains under 1.5 degrees Celsius…..On average, the renewable energy system would be about two percent cheaper…..without negative emission technologies, fossil fuels with carbon capture, or nuclear power.” Lots more information in the story.
–The full study can be found at this link:
–George Monbiot’s ideas about natural solutions, previously reported in these letters, are a perfect match for the above scenario as a safe and constructive way to capture carbon from the atmosphere. Here is an update from an interview in The Conversation:
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New information about the loss of sea ice in the Arctic (Mongabay). Perhaps the most stunning development is the unprecedented rate of decline, for this time of year, in just the last week or two.
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Battery technology just got a potentially huge new boost (World Scientific). A Chinese research group claims to have found a solution for the problems that have held back commercialization of zinc-air batteries. This type of battery “has attracted great attention from researchers due to its high specific energy, high current density, low cost, and environmental friendliness.” All of these elements compare favorably with the current lithium-ion standard. No comment was made with respect to a timetable for full development, which will now need to be addressed. https://www.eurekalert.org/pub_releases/2019-04/ws-nzb041219.php
Carl