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Human influence has intensified extreme precipitation in North America

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    Human influence has intensified extreme precipitation in North America

    https://www.pnas.org/content/early/2020/05/26/1921628117 https://www.pnas.org/content/early/2020/05/26/1921628117

    Human influence has intensified extreme precipitation in North America
    Megan C. Kirchmeier-Young and View ORCID ProfileXuebin Zhang
    PNAS first published June 1, 2020 https://doi.org/10.1073/pnas.1921628117

    Edited by Susan Solomon, Massachusetts Institute of Technology, Cambridge, MA, and approved April 20, 2020 (received for review December 9, 2019)

    Significance

    Extreme precipitation is relevant to many interests, and observations show an increasing trend that is expected to continue under future projections. Although previous work has identified an anthropogenic influence on extreme precipitation at hemispheric scales, this study finds robust results for a continental scale. We establish that anthropogenic climate change has contributed to the intensification of continental and regional extreme precipitation. Furthermore, we also show that the anthropogenic influence on North American regional precipitation will lead to more frequent and intense precipitation extremes in the future.
    Abstract

    Precipitation extremes have implications for many facets of both the human and natural systems, predominantly through flooding events. Observations have demonstrated increasing trends in extreme precipitation in North America, and models and theory consistently suggest continued increases with future warming. Here, we address the question of whether observed changes in annual maximum 1- and 5-d precipitation can be attributed to human influence on the climate. Although attribution has been demonstrated for global and hemispheric scales, there are few results for continental and subcontinental scales. We utilize three large ensembles, including simulations from both a fully coupled Earth system model and a regional climate model. We use two different attribution approaches and find many qualitatively consistent results across different methods, different models, and different regional scales. We conclude that external forcing, dominated by human influence, has contributed to the increase in frequency and intensity of regional precipitation extremes in North America. If human emissions continue to increase, North America will see further increases in these extremes.

    #2
    Yes, we're getting more extreme rainfall, and it's due to climate change, study confirms

    https://www.cbc.ca/news/technology/extreme-rainfall-climate-change-1.5595396 https://www.cbc.ca/news/technology/extreme-rainfall-climate-change-1.5595396

    Comment


      #3
      Let the bashing and denials begin! LOL

      Or if you are up to it produce some peer reviewed climate science to disprove it! If you are not too busy.

      Comment


        #4
        Dr Sauchyn has said similar. How our annual precipitation might not change much but it could easily start falling in shorter time frames, making it a pain in the ass then and less helpful overall.

        https://rr2cs.ca/ep23-water-adaptation/

        Comment


          #5
          Vancouver:

          Average per decade should be 18.75. 40's, 50's, 70's, 2000's and 2010's below. The 60's, 70's, 80's and 90's were above average.

          Click image for larger version

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          Comment


            #6
            Anytime you see RCP8.5 (like in this study), keep in mind it's utter fiction. Produced only to feed climate disaster porn. Consider that our CO2 level has risen 100ppm over the last 50 years, is it conceivable it will rise 900ppm in the next 80 years? Not going to happen.



            Comment


              #7
              Originally posted by ColevilleH2S View Post
              Anytime you see RCP8.5 (like in this study), keep in mind it's utter fiction. Produced only to feed climate disaster porn. Consider that our CO2 level has risen 100ppm over the last 50 years, is it conceivable it will rise 900ppm in the next 80 years? Not going to happen.



              And your scientific qualifications are?

              Comment


                #8
                Originally posted by farming101 View Post
                Vancouver:

                Average per decade should be 18.75. 40's, 50's, 70's, 2000's and 2010's below. The 60's, 70's, 80's and 90's were above average.

                [ATTACH]6145[/ATTACH]
                One location and there are only 10s of thousands of Weather station locations across North America. Show us all the data!

                Comment


                  #9
                  Vancouver is near the top of the list of cities in Canada for annual precipitation.

                  The statistics are sc****d from Environment Canada records.

                  Very interesting that there have been less days with new record amounts in the last 2 decades

                  Comment


                    #10
                    You know when you reply to your own post over and over you're just looking for attention.

                    Stop giving it to him.

                    Comment


                      #11
                      Let me summarize what chuck chuck is saying....

                      It sure would be nice to get a rain.

                      Comment


                        #12
                        Let me summarize what chuck chuck is saying....

                        It sure would be nice to get a rain.

                        Comment


                          #13
                          There's another thread on today's show list titled "Why We Drink". This thread on man made (or in Canada man maid) climate change is why.

                          Sprayer has DEF dosing (thanks Paris plucking Accord) problem. Needed tech and not the hot JD girls. Carbon tax is redistributing whatever wealth we created. "The Little Dictator" comes out of his Rideau spider cave everyday to announce funding, which to be successful in getting, you have to detail the climate improvements you'll make.

                          Enough already. Earlier this week our emerged canola just about froze in June. Guess what? It did the same thing 2 decades ago before the world got sucked into this Marxist plot.

                          Please take your cut and paste bullshit climate scientist crap and find some thin Arctic ice and take a stroll on it.
                          Last edited by Braveheart; Jun 3, 2020, 15:14.

                          Comment


                            #14
                            But just bring a rain before you and your climate alarmists go on that stroll.


                            Sure could use a rain....that you cut and paste about chuck chuck....

                            Comment


                              #15
                              Originally posted by bucket View Post
                              Let me summarize what chuck chuck is saying....

                              It sure would be nice to get a rain.
                              You can say that again!

                              Comment

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