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Climate change and global warming 2020

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  • #46
    Originally posted by shunyadragon View Post

    Too much CO2 also insulates the atmosphere and prevents heat from escaping, basic science = global warming.
    OR, as says shows, CO2 increases after the global temperature increases. But for global warming, we have to put away what is truthful so that we can follow the scare policy. It is a government-funded fairy tale designed to scare the youth. When people are in fear they will take solutions that in fact are irrational.
    Last edited by mikewhitney; 10-15-2020, 01:05 PM.

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    • #47
      Originally posted by mikewhitney View Post
      OR, as says shows, CO2 increases after the global temperature increases.
      It's largely a myth that CO2 generally lags temperature, that happens only for the early parts of the ten thousand year long Milankovich cycle. And we're not in at the start of one of those now.

      But for global warming, we have to put away what is truthful so that we can follow the scare policy. It is a government-funded fairy tale designed to scare the youth. When people are in fear they will take solutions that in fact are irrational.
      No, it's pretty much just the conclusions of the Scientific Community, the foundation of was laid as far back as in the thirties when models of how infrared radiation interacted with the atmosphere was laid, it became a serious study in the seventies, it was pretty much solidified at the turn of the millennium and nothing has changed the basic conclusion or model.

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      • #48
        Originally posted by mikewhitney View Post

        OR, as says shows, CO2 increases after the global temperature increases. But for global warming, we have to put away what is truthful so that we can follow the scare policy. It is a government-funded fairy tale designed to scare the youth. When people are in fear they will take solutions that in fact are irrational.
        The above bold is true and results in global warming.

        Again you are into anti-science conspiracy mythology. The global warming is based on the evidence and sound science.
        Glendower: I can call spirits from the vasty deep.
        Hotspur: Why, so can I, or so can any man;
        But will they come when you do call for them? Shakespeare’s Henry IV, Part 1, Act III:

        go with the flow the river knows . . .

        Frank

        I do not know, therefore everything is in pencil.

        Comment


        • #49
          Whether this year is the hottest on record or the close second hottest the trends over time demonstrate a potential devastating future.

          Source: https://www.weforum.org/agenda/2020/10/climate-change-environment-earth-temperature-global-warming-heat/



          2020 is on course to be the warmest year on record

          • 2020 is set to be the warmest year on record, according to data from different sources, including NASA.
          • This is even more remarkable despite it not being an El Niño extreme weather event year.
          • The first nine months of the year saw record concentrations of major greenhouse gases like CO2, methane, and nitrous oxide.
          • Arctic sea ice extent was also at record low levels for much of the summer.

          While this year will be memorable for many reasons, it is now more likely than not that 2020 will also be the warmest year for the Earth’s surface since reliable records began in the mid-1800s.

          This is all the more remarkable because it will lack any major El Niño event – a factor that has contributed to most prior record warm years.

          However, with three months remaining, there is still some uncertainty. There is a chance that a growing La Niña in the tropical Pacific may drive cooler temperatures leading to a second-place finish – at least in some of the global temperature records produced by different groups of researchers around the world.

          The first nine months of the year saw record concentrations of major greenhouse gases – CO2, methane, and nitrous oxide – in the atmosphere. Arctic sea ice extent was at record low levels for much of the summer and the summer minimum clocked in as the second lowest on record after 2012.

          While climate records are a useful benchmark to highlight the warming of the planet, the change in temperatures, sea ice and other climate factors over time are much more important than if any single year sets a new record.

          There has been a clear warming trend over the past 50 years, along with hints in some datasets of potential acceleration in recent years. Similarly, both sea ice extent and volume are clearly declining over time.

          Surface temperatures show record warmth

          The first nine months of 2020 were remarkably warm. Carbon Brief has analyzed records from six different research groups that report global surface temperature records: NASA; NOAA; Met Office Hadley Centre/UEA; Berkeley Earth; Cowtan and Way; and Copernicus/ECMWF.

          The figure below shows the temperature anomalies – changes relative to the 1981-2010 average temperature – for each year since 1970, along with the average over the first nine months of 2020. (Note: at the time of writing, September data was not yet available for the Hadley/UEA or Cowtan and Way temperature records.)

          © Copyright Original Source




          Last edited by shunyadragon; 10-29-2020, 09:54 AM.
          Glendower: I can call spirits from the vasty deep.
          Hotspur: Why, so can I, or so can any man;
          But will they come when you do call for them? Shakespeare’s Henry IV, Part 1, Act III:

          go with the flow the river knows . . .

          Frank

          I do not know, therefore everything is in pencil.

          Comment


          • #50

            Source: https://scitechdaily.com/expect-more-mega-droughts-droughts-that-last-two-decades-or-longer/




            Expect More Mega-Droughts – Droughts That Last Two Decades or Longer



            Mega-droughts – droughts that last two decades or longer – are tipped to increase thanks to climate change, according to University of Queensland-led research.

            UQ’s Professor Hamish McGowan said the findings, which are published in Nature Scientific Reports, suggested climate change would lead to increased water scarcity, reduced winter snow cover, more frequent bushfires, and wind erosion.

            The revelation came after an analysis of geological records from the Eemian Period – 129,000 to 116,000 years ago – which offered a proxy of what we could expect in a hotter, drier world.

            “We found that, in the past, a similar amount of warming has been associated with mega-drought conditions all over south eastern Australia,” Professor McGowan said.

            “These drier conditions prevailed for centuries, sometimes for more than 1000 years, with El Niño events most likely increasing their severity.”

            The team engaged in paleoclimatology – the study of past climates – to see what the world will look like as a result of global warming over the next 20 to 50 years.

            “The Eemian Period is the most recent in Earth’s history when global temperatures were similar, or possibly slightly warmer than present,” Professor McGowan said.

            “The ‘warmth’ of that period was in response to orbital forcing, the effect on climate of slow changes in the tilt of the Earth’s axis and shape of the Earth’s orbit around the sun.

            “In modern times, heating is being caused by high concentrations of greenhouse gases, though this period is still a good analogue for our current-to-near-future climate predictions.”

            Researchers worked with the New South Wales Parks and Wildlife service to identify stalagmites in the Yarrangobilly Caves in the northern section of Kosciuszko National Park.

            Small samples of the calcium carbonate powder contained within the stalagmites were collected, then analyzed and dated at UQ.

            That analysis allowed the team to identify periods of significantly reduced precipitation during the Eemian Period.

            “They’re alarming findings, in a long list of alarming findings that climate scientists have released over the last few decades,” Professor McGowan said.

            “We hope that this new research allows for new insights to our future climate and the risks it may bring, such as drought and associated bushfires.

            “But, importantly, if humans continue to warm the planet, this is the future we may all be looking at.”

            The research was part of a project supported by Snowy Hydro Ltd to develop understanding of likely climate variability in a warmer world and the impact on the hydroclimate of southeast Australia.

            Reference: “Evidence of wet-dry cycles and mega-droughts in the Eemian climate of southeast Australia” by Hamish McGowan, Micheline Campbell, John Nikolaus Callow, Andrew Lowry and Henri Wong, 22 October 2020, Scientific Reports.
            DOI: 10.1038/s41598-020-75071-z

            © Copyright Original Source



            Glendower: I can call spirits from the vasty deep.
            Hotspur: Why, so can I, or so can any man;
            But will they come when you do call for them? Shakespeare’s Henry IV, Part 1, Act III:

            go with the flow the river knows . . .

            Frank

            I do not know, therefore everything is in pencil.

            Comment

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