Human influence has intensified extreme precipitation in North America

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Human influence has intensified extreme precipitation in North America

Jun 3, 2020 | 10:24 1 https://www.pnas.org/content/early/2.../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. Reply With Quote
Jun 3, 2020 | 10:25 2 Yes, we're getting more extreme rainfall, and it's due to climate change, study confirms

https://www.cbc.ca/news/technology/e...ange-1.5595396 Reply With Quote
Jun 3, 2020 | 10:28 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. Reply With Quote
Blaithin's Avatar Jun 3, 2020 | 10:43 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/ Reply With Quote
Jun 3, 2020 | 12:03 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.

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ColevilleH2S's Avatar Jun 3, 2020 | 12:20 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.



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  • Jun 3, 2020 | 12:29 7
    Quote 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? Reply With Quote
    Jun 3, 2020 | 12:32 8
    Quote 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.

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Size:  58.6 KB
    One location and there are only 10s of thousands of Weather station locations across North America. Show us all the data! Reply With Quote
    Jun 3, 2020 | 13:02 9 Vancouver is near the top of the list of cities in Canada for annual precipitation.

    The statistics are scraped from Environment Canada records.

    Very interesting that there have been less days with new record amounts in the last 2 decades Reply With Quote
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  • LEP
    Jun 3, 2020 | 14:29 10 You know when you reply to your own post over and over you're just looking for attention.

    Stop giving it to him. Reply With Quote
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  • Jun 3, 2020 | 14:52 11 Let me summarize what chuck chuck is saying....

    It sure would be nice to get a rain. Reply With Quote
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  • Jun 3, 2020 | 15:01 12 Let me summarize what chuck chuck is saying....

    It sure would be nice to get a rain. Reply With Quote
  • 1 Like


  • Jun 3, 2020 | 15:11 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 at 15:14.
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  • Jun 3, 2020 | 15:28 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.... Reply With Quote
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  • Jun 3, 2020 | 15:28 15
    Quote 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! Reply With Quote
    Jun 3, 2020 | 15:34 16
    Quote Originally Posted by bucket View Post
    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....
    We have to be careful here. If we spill a glass of water on the fields left to seed we're done for the year. Reply With Quote
    Jun 3, 2020 | 16:14 17
    Quote Originally Posted by bucket View Post
    Let me summarize what chuck chuck is saying....

    It sure would be nice to get a rain.
    So what your saying is .....

    I hope you get rain and we get more than 2 months frost free this year .
    2/3 growing Sask is dry or getting very dry
    Frost in June again
    Yet we are told this bunk ...

    Say Sun Spot activity 20 times and go sit in the corner .... not you bucket , hope the best for you guys south 👍👍 Reply With Quote
    Jun 3, 2020 | 16:21 18
    Quote Originally Posted by LEP View Post
    You know when you reply to your own post over and over you're just looking for attention.

    Stop giving it to him.
    Yup ....
    Reply With Quote
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  • Jun 3, 2020 | 17:48 19 Oh good god!!!

    For 25 years now we were told global warming was going to lead to heat and drought like agriculture has never seen. Global food stocks will be decimated!!! Reply With Quote
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  • Jun 3, 2020 | 17:52 20
    Quote Originally Posted by seldomseen View Post
    Oh good god!!!

    For 25 years now we were told global warming was going to lead to heat and drought like agriculture has never seen. Global food stocks will be decimated!!!
    The narrative changes with the weather it seems Reply With Quote
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  • blackpowder's Avatar Jun 3, 2020 | 18:36 21 Okay, so it's gonna rain more often and harder. So what?
    Some depleted aquifers could use that.
    Can't see how this will change my life or my kids'. Tax and spend while killing the economy as the biggest countries are doing the opposite will surely do so however.
    Can't you ever talk about that? Reply With Quote
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  • Jun 3, 2020 | 19:13 22
    Quote Originally Posted by blackpowder View Post
    Okay, so it's gonna rain more often and harder. So what?
    Some depleted aquifers could use that.
    Can't see how this will change my life or my kids'. Tax and spend while killing the economy as the biggest countries are doing the opposite will surely do so however.
    Can't you ever talk about that?
    may as well argue with a fence post Reply With Quote
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  • fjlip's Avatar Jun 3, 2020 | 20:46 23 "There is NONE so blind as he who WILL not see"! Fits perfectly! Brainless, no reasoning, follow the CULT! Reply With Quote
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  • Jun 3, 2020 | 21:16 24
    Quote Originally Posted by bucket View Post
    Let me summarize what chuck chuck is saying....

    It sure would be nice to get a rain.
    chuck is off his *** meds again Reply With Quote
    Jun 3, 2020 | 21:50 25 This blight that has overtaken Ottawa will someday pass and common sense and logic will rush in to fill the vacuum left by Trudeau and his one dimensional thinking followers as they exit the building for good. Reply With Quote
    Jun 3, 2020 | 22:14 26 Actually there are no words. 🤦🏻*♂️ Reply With Quote
    Jun 4, 2020 | 06:38 27 I see you have mostly reverted to the bashing! What a surprise! LOL Couldn't find any peer reviewed research to backup your "opinions"

    It would be nice to get an inch, but when you get 7 -10 inches at once which has happened at this time of year, these extreme rainfall events cause a lot of crop loss and can set you up for a wet harvest.

    Some scientists have research that shows a connection between climate change, a weakening jet stream and persistent weather and blocking weather systems which can lead to miserable harvests, for example.

    Does that sound familiar?
    Last edited by chuckChuck; Jun 4, 2020 at 06:41.
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    Jun 4, 2020 | 07:16 28
    Quote Originally Posted by chuckChuck View Post
    I see you have mostly reverted to the bashing! What a surprise! LOL Couldn't find any peer reviewed research to backup your "opinions"

    It would be nice to get an inch, but when you get 7 -10 inches at once which has happened at this time of year, these extreme rainfall events cause a lot of crop loss and can set you up for a wet harvest.

    Some scientists have research that shows a connection between climate change, a weakening jet stream and persistent weather and blocking weather systems which can lead to miserable harvests, for example.

    Does that sound familiar?
    Chuck2 here is the problem, many times I have asked you how you think we can get to net zero by 2050, your like everybody else you really don’t know but we have to get there. You preach about the levels of C02 in the atmosphere and how they can’t go up any further but let’s be realistic if all the computer models(remember most prognostications are models not fact) are correct a good percentage of the warming is already locked in but you continue to beat us over the head! Why?! Electric machinery to replace all my equipment doesn’t exist and if it did I couldn’t afford to replace it all anyways, I am not going to stop using fertilizer or quit raising my cows. My friend in Manning last year had a killing front of -7 on June 7th and a killing frost again in late August, for most of us reality beats out all the plucking computer models! Enjoy your day. Reply With Quote
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  • Jun 4, 2020 | 08:24 29
    Quote Originally Posted by chuckChuck View Post
    I see you have mostly reverted to the bashing! What a surprise! LOL Couldn't find any peer reviewed research to backup your "opinions"

    It would be nice to get an inch, but when you get 7 -10 inches at once which has happened at this time of year, these extreme rainfall events cause a lot of crop loss and can set you up for a wet harvest.

    Some scientists have research that shows a connection between climate change, a weakening jet stream and persistent weather and blocking weather systems which can lead to miserable harvests, for example.

    Does that sound familiar?
    Yup it does , it’s explained in very low sunspot activity. Has been proven through less particle forcing in the atmosphere. Also proven in past low sun spot activity.
    Do some research on Ben Davidson, I have shared links before . He explains this exact situation due very low sunspot activity , weak particle forcing and its effects on jet streams and weather blocking .
    Two sides to every story Reply With Quote
    Jun 4, 2020 | 08:37 30
    Quote Originally Posted by furrowtickler View Post
    Yup it does , it’s explained in very low sunspot activity. Has been proven through less particle forcing in the atmosphere. Also proven in past low sun spot activity.
    Do some research on Ben Davidson, I have shared links before . He explains this exact situation due very low sunspot activity , weak particle forcing and its effects on jet streams and weather blocking .
    Two sides to every story
    Where is the long cut and paste to prove it????

    sarcasm. Reply With Quote