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  • Global temperatures could exceed crucial 1.5 C target in the next five years

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    • Climate economics support for the UN climate targets

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      • Biden to Call for $2 Trillion in Spending on Clean Energy

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        • World's largest study shows carbon pricing reduces emissions

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          • "Spreading rock dust on farmland could suck billions of tonnes of carbon dioxide from the air every year, according to the first detailed global analysis of the technique.

            The chemical reactions that degrade the rock particles lock the greenhouse gas into carbonates within months, and some scientists say this approach may be the best near-term way of removing CO2 from the atmosphere.
            <>
            The rock dust approach, called enhanced rock weathering (ERW), has several advantages, the researchers say. First, many farmers already add limestone dust to soils to reduce acidification, and adding other rock dust improves fertility and crop yields, meaning application could be routine and desirable.

            Basalt is the best rock for capturing CO2, and many mines already produce dust as a byproduct, so stockpiles already exist. The researchers also found that the world’s biggest polluters, China, the US and India, have the greatest potential for ERW, as they have large areas of cropland and relatively warm weather, which speeds up the chemical reactions.

            The analysis, published in the journal Nature, estimates that treating about half of farmland could capture 2bn tonnes of CO2 each year, equivalent to the combined emissions of Germany and Japan."

            https://www.theguardian.com/environm...b-global-en-GB

            Pretty cool. Removes CO2 from the Atmos. and improves soil fertility at the same time.

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            • Siberia’s hot 2020 “effectively impossible” without global warming

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              • Climate Change Poses ‘Systemic Threat’ to the Economy, Big Investors Warn

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                • An assessment of Earth's climate sensitivity using multiple lines of evidence

                  Plain Language Summary


                  Earth's global “climate sensitivity” is a fundamental quantitative measure of the susceptibility of Earth's climate to human influence. A landmark report in 1979 concluded that it probably lies between 1.5‐4.5C per doubling of atmospheric carbon dioxide, assuming that other influences on climate remain unchanged. In the 40 years since, it has appeared difficult to reduce this uncertainty range. In this report we thoroughly assess all lines of evidence including some new developments. We find that a large volume of consistent evidence now points to a more confident view of a climate sensitivity near the middle or upper part of this range. In particular, it now appears extremely unlikely that the climate sensitivity could be low enough to avoid substantial climate change (well in excess of 2C warming) under a high‐emissions future scenario. We remain unable to rule out that the sensitivity could be above 4.5C per doubling of carbon dioxide levels, although this is not likely. Continued research is needed to further reduce the uncertainty and we identify some of the more promising possibilities in this regard.

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                  • Interesting how things get twisted a bit to fit the agendas ...

                    Ancient Ice Loss in Antarctica’s Most Stable Region Paints a Bleak Picture of What Could Come

                    ...
                    A new paper suggests that the East Antarctic ice sheet may not be as stable as we thought. Looking at ancient melting, the study finds evidence that this piece of the Antarctic experienced melting 400,000 years ago when the world was 1.8 to 3.6 degrees Fahrenheit (1 to 2 degrees Celsius) warmer. Enough ice melted could have occurred here to raise the sea by about 10 to 13 feet.
                    ....
                    https://www.msn.com/en-us/news/weath...C?ocid=msnbcrd

                    Point is there weren't humans and an "industrial age/era" 400,000 years ago to produce that "global warming" or any other such prior episodes. There may be factors other than CO2 levels.
                    TANSTAAFL = There Ain't No Such Thing As A Free Lunch
                    “War is merely the continuation of politics by other means” - von Clausewitz
                    Present Current Events are the Future's History

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                    • After 40 years, researchers finally see Earth’s climate destiny more clearly

                      It seems like such a simple question: How hot is Earth going to get? Yet for 40 years, climate scientists have repeated the same unsatisfying answer: If humans double atmospheric carbon dioxide (CO2) from preindustrial levels, the planet will eventually warm between 1.5C and 4.5C—a temperature range that encompasses everything from a merely troubling rise to a catastrophic one.

                      Now, in a landmark effort, a team of 25 scientists has significantly narrowed the bounds on this critical factor, known as climate sensitivity. The assessment, conducted under the World Climate Research Programme (WCRP) and publishing this week in Reviews of Geophysics, relies on three strands of evidence: trends indicated by contemporary warming, the latest understanding of the feedback effects that can slow or accelerate climate change, and lessons from ancient climates. They support a likely warming range of between 2.6C and 3.9C, says Steven Sherwood, one of the study’s lead authors and a climate scientist at the University of New South Wales. “This is the number that really controls how bad global warming is going to be.”

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                      • Originally posted by G David Bock View Post
                        Interesting how things get twisted a bit to fit the agendas ...

                        Ancient Ice Loss in Antarctica’s Most Stable Region Paints a Bleak Picture of What Could Come

                        ...
                        A new paper suggests that the East Antarctic ice sheet may not be as stable as we thought. Looking at ancient melting, the study finds evidence that this piece of the Antarctic experienced melting 400,000 years ago when the world was 1.8 to 3.6 degrees Fahrenheit (1 to 2 degrees Celsius) warmer. Enough ice melted could have occurred here to raise the sea by about 10 to 13 feet.
                        ....
                        https://www.msn.com/en-us/news/weath...C?ocid=msnbcrd

                        Point is there weren't humans and an "industrial age/era" 400,000 years ago to produce that "global warming" or any other such prior episodes. There may be factors other than CO2 levels.
                        Those other factors have been identified; solar output, CO2 dissolved in the oceans, the milankovitch cycles....

                        Look up a youtuber called Potholer54, he will explain things at *your level*.

                        Comment


                        • Originally posted by Jutland View Post

                          Those other factors have been identified; solar output, CO2 dissolved in the oceans, the milankovitch cycles....

                          Look up a youtuber called Potholer54, he will explain things at *your level*.
                          That would be this guy;
                          Peter Hadfield (journalist) - Wikipedia

                          ... and maybe later when I have time to indulge another propagandist.

                          Have seen and checked out those "other factors" and one often under considered is the heat rising up from the Earth's core and/or volcanic emmissions, accumulated over time.

                          One key concern is that record of past 500+ million years shows higher temps with low CO2 and lower temps with higher CO2, so the CO2 as major cause now remains debatable to many of us.



                          https://www.researchgate.net/profile...acRae-2008.ppm

                          TANSTAAFL = There Ain't No Such Thing As A Free Lunch
                          “War is merely the continuation of politics by other means” - von Clausewitz
                          Present Current Events are the Future's History

                          Comment


                          • Top Scientists Just Ruled Out Best-Case Global Warming Scenarios

                            A major new study of the relationship between carbon dioxide and global warming lowers the odds on worst-case climate change scenarios while also ruling out the most optimistic estimates nations have been counting on as they attempt to implement the Paris Agreement.

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                            • This Is the “Most Economically Important” Fern on Earth

                              Meet the plant nicknamed ‘green manure.’

                              ..........
                              Much like Frodo in The Lord of the Rings, the fern Azolla filiculoides proves that the small can certainly pack a punch. This minuscule water fern, which has leaves the size of a single gnat, was the focus of a 2018 study published in Nature Plants. Scientists say the bright green plant is complete with unique capabilities — and has the potential to help us mitigate the effects of climate change.

                              In the study, an international team of scientists announced they successfully sequenced the A. filiculoids genome as well as the genome of another floating fern known as Salvina cucullata. Co-author and University of California Berkeley integrative biology professor Carl Rothfels, Ph.D. tells Inverse that having these genomes brings scientists one step closer to “understanding some of the crazy biology of these particular species.”

                              Rothfels says that one of the most “extraordinary features” of this fern is its ability to have a symbiotic relationship with cyanobacteria, which in turn gives it the ability to “fix” nitrogen. Nitrogen fixation is the process by which plants use the chemical element as a fertilizer: Most plants typically can’t do this alone, but the blue-green cyanobacteria that live in the Azolla leaves allow for this process to happen. In turn, Azolla can sustain rapid growth in favorable conditions.

                              That’s important for multiple reasons, the first being that the fern shows “great promise as a biofuel,” says Rothfel. While it’s been used as a fertilizer for rice paddies in Asia for the past 1,000 years, he and his team are now curious to know whether it could be used as a sustainable fertilizer elsewhere. Its ability to help agricultural crops is compounded by its resistance to pests: Farmers have noticed for decades that bugs generally don’t like ferns, and now the sequencing of the Azolla genome reveals it carries certain genetic mutations that allow it to repel insects.

                              All of this has earned Azolla the nickname “green manure,” and co-author and Cornell University assistant professor Fay-Wei Li, Ph.D. says it is “perhaps the most economically important fern that has ever lived!”

                              But Li and Rothfel both note that the fern’s incredible ability to grow and thrive could help humans save themselves from climate change. In fact, it’s actually helped out the planet before.

                              “There was a massive Azolla bloom in the Arctic 50 million years ago so large that geologists believe it drove down a significant amount of C02 (carbon dioxide) and helped cool the Earth,” says Li.
                              .........
                              https://getpocket.com/explore/item/a...=pocket-newtab
                              TANSTAAFL = There Ain't No Such Thing As A Free Lunch
                              “War is merely the continuation of politics by other means” - von Clausewitz
                              Present Current Events are the Future's History

                              Comment


                              • Could Air-Conditioning Fix Climate Change?

                                Researchers proposed a carbon-neutral “synthetic oil well” on every rooftop.
                                ..........
                                It is one of the great dilemmas of climate change: We take such comfort from air conditioning that worldwide energy consumption for that purpose has already tripled since 1990. It is on track to grow even faster through mid-century—and assuming fossil-fuel–fired power plants provide the electricity, that could cause enough carbon dioxide emissions to warm the planet by another deadly half-degree Celsius.

                                A paper published in the Nature Communications proposes a partial remedy: Heating, ventilation and air conditioning (or HVAC) systems move a lot of air. They can replace the entire air volume in an office building five or 10 times an hour. Machines that capture carbon dioxide from the atmosphere—a developing fix for climate change—also depend on moving large volumes of air. So why not save energy by tacking the carbon capture machine onto the air conditioner?

                                This futuristic proposal, from a team led by chemical engineer Roland Dittmeyer at Germany’s Karlsruhe Institute of Technology, goes even further. The researchers imagine a system of modular components, powered by renewable energy, that would not just extract carbon dioxide and water from the air. It would also convert them into hydrogen, and then use a multistep chemical process to transform that hydrogen into liquid hydrocarbon fuels. The result: “Personalized, localized and distributed, synthetic oil wells” in buildings or neighborhoods, the authors write. “The envisioned model of ‘crowd oil’ from solar refineries, akin to ‘crowd electricity’ from solar panels,” would enable people “to take control and collectively manage global warming and climate change, rather than depending on the fossil power industrial behemoths.”

                                The research group has already developed an experimental model that can complete several key steps of the process, Dittmeyer says, adding, “The plan in two or three years is to have the first experimental showcase where I can show you a bottle of hydrocarbon fuel from carbon dioxide captured in an air-conditioning unit.”
                                ......
                                https://getpocket.com/explore/item/c...=pocket-newtab
                                TANSTAAFL = There Ain't No Such Thing As A Free Lunch
                                “War is merely the continuation of politics by other means” - von Clausewitz
                                Present Current Events are the Future's History

                                Comment

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