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Misc Historic solar cycle minimum coming

Discussion in 'General Weather' started by GaWx, Jan 25, 2017.

  1. GaWx

    GaWx Supporter Member

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    That spotless streak ended up being 7 days and it ended when a very small group appeared on Sunday. By your count, there have been 63 spotless days in 2017.

    Edit: That tiny spot is already gone.
     
    Last edited: Oct 16, 2017
  2. ForsythSnow

    ForsythSnow Staff Member Moderator

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    Yep, here we go again to another streak perhaps.
     
  3. Lostnthaweather85

    Lostnthaweather85 Member

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    Read an article about how satellites are no longer being made with the highly reflective material iridium, so for those of you who like to watch iridium flares like I do better catch them while you can. Watched a beautiful one last night. For those who don't know about them do a quick Google search. I have an app called Sputnik that shows when and where to look.
     
  4. Cad Wedge NC

    Cad Wedge NC Member

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    I use the website Heavens-Above.com
     
  5. GaWx

    GaWx Supporter Member

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    Since this last post of 10/16, about half the days have been spotless including the last 5. Also, the Stereo images of the other side look very quiet. So, the current five day streak may get a lot longer. We may very well get that 100+ day spotless 2017.
    I wasn't as optimistic about that chance just one month ago. But having 16-17 spotless days since then along with very quiet looking Stereo images will do wonders.
     
  6. GaWx

    GaWx Supporter Member

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    The sun has for the past month been just about as quiet as it has been since just after the end of the 2008-9 deep minimum when also considering that the stereo images from the other side of the sun suggest it is also very quiet there. We're now at 7 days' spotless with no end in sight at the moment (though a new spot could always pop up) and a very low 68 flux. Considering that we're likely still at least close to 3 years from the upcoming minimum, the upcoming minimum continues to
    have the prospect of being the weakest at least since the Dalton minima of 200 years ago!
     
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  7. GaWx

    GaWx Supporter Member

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    I'm very impressed with how quiet is the sun. All days in November have been spotless so far. Stereo images suggest the current spotless streak may go on for a while longer. We are clearly quieter than the prior cycle, which itself was the quietest in ~100 years.
    Current solar flux is very low:

    http://www.spaceweather.gc.ca/solarflux/sx-5-flux-en.php
     
    Last edited: Nov 9, 2017
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  8. GaWx

    GaWx Supporter Member

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    Still no sunspots in November so far! So, today will make a very impressive 12 days in a row of spotless! Stereo images suggest the chance for a new sunspot to rotate onto the left side tonight or tomorrow. If that doesn't turn out to be a sunspot, this spotless streak could go on for a good number of days more.

    Edit 11/14: We finally got a spot on 11/14 after 13 spotless days in a row. It is the only game in town on either side of the sun.
     
    Last edited: Nov 14, 2017
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  9. GaWx

    GaWx Supporter Member

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    The sun has been spotless again for several days and looks about as quiet as it can possibly look on the other side per the Stereo imagery. So, absent any new spots popping up, we may be in the midst of still another long spotless streak. With the amount of time expected before the next cycle min, it is definitely acting like a grand solar minimum. If there are no new sunspots over the next 8 days, Nov will come in sub 3, a type of month that in some cycles is never seen and in others is seen only very close to the cycle min. Regardless, Nov is now about guaranteed to come in as the first single number month of this cycle's quieting time. Exciting times!
     
    Last edited: Nov 22, 2017
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  10. GaWx

    GaWx Supporter Member

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    The sun continues to be deader than a doornail with spotless days dominating the last couple of months and daily flux down to 68 yesterday. Stereo images show nothing on the immediate horizon to rotate onto the visible disk over the next few days. Pre "grand minimum" conditions continue.
     
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  11. ForsythSnow

    ForsythSnow Staff Member Moderator

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    We are getting closer and closer to 100 spotless days for they year now as well. Wonder how many days we will have in 2018.
     
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  12. GaWx

    GaWx Supporter Member

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    ^ We ended up with very close to 100 spotless days in 2017 but it varies from just below to just above depending on the source of the count.

    Meanwhile, January of 2018 has been VERY quiet and we're currently on an 11 day spotless steak. The oncoming Grand Minimum very much remains on track!
     
    Last edited: Jan 30, 2018
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  13. GaWx

    GaWx Supporter Member

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    Fwiw:

    https://nextgrandminimum.wordpress.com/

    I'm remaining open minded about what this anticipated upcoming Grand Minimum will or won't do as far as cooling the globe back down. I don't think anyone really knows.
     
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  14. pcbjr

    pcbjr Supporter Member

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    Unfortunately, if it cools down, by then I'll probably need a blanket and a scarf in Florida, even for "normal" weather ... age and all ... LOL
     
    Last edited: Feb 7, 2018
  15. k0skinne

    k0skinne Member

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  16. GaWx

    GaWx Supporter Member

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    Although we're likely still 2-3 years away from the current cycle's upcoming minimum, we've already been in recent months at quiet enough sunspot averages to be fairly close to a more typical minimum! Over the last 30 days alone, there have been 23 spotless days. With the current spotlessness as well as predictions for continued quiet, March could very well end up with only 4 non-spotless days and a monthly average sunspot number of only 2! Getting a monthly of only 2 that is still 2-3 years from the cycle's minimum would say we're clearly in a Grand Minimum the likes of which hasn't been seen in at least close to 200 years, the time of the Dalton Minimum. Exciting times!
     
    Last edited: Mar 25, 2018
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  17. ForsythSnow

    ForsythSnow Staff Member Moderator

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    Yep, so far, we have had more spotless days than not, and if it stay spotless and sunspot activity continues to lessen, it could very well become a higher percentage. Maybe we will have well over 90% days next year spotless at the rate we are going. Moreover, I wonder if any studies are going to be conducted during the minimum assuming it happens and it's impacts on the world as a whole.
     
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  18. MichaelJ

    MichaelJ Member

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    So far 2018 has had 51 spotless days, almost exactly half of last years total (104)
     
  19. GaWx

    GaWx Supporter Member

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    April 1-8 were spotless with very low solar flux. We still appear to be headed to a deep minimum. However, I see what looks like a new group of small spots that just popped up fairly far south.

    Meanwhile, I've been reading about some new research related to the recent sunspot drop /expected upcoming grand minimum that suggests cooling is likely soon in the mid latitudes. I'm not saying I'm necessarily believing these since I'm always worried about bias. Rather, I'm putting these out here to try to generate discussion knowing that the science behind GW is far from settled:

    1.
    https://www.nature.com/articles/s41598-018-22854-0
    "Solar cyclic variability can modulate winter Arctic climate"

    The above suggests that the -AO tends to get stronger during quiet sunspot winters. IF that is true, the overall chances for cold winters in the mid latitudes of the world will increase as we go into the grand solar minimum even as the Arctic may warm further.

    2. https://arxiv.org/abs/1804.01302

    IMG_2684.PNG

    The above chart, which is based on cosmic rays (CRs) hitting Earth, suggests we're just coming out of a 100-200 year period of high sunspot activity not seen in several thousand years. IF true, that may support the idea that a significant component of recent GW has been due to indirect effects of the sun, including reduced amounts of CRs reaching Earth, which has been theorized to reduce cloud cover, which may have helped lead to a warming globe. With an expected grand minimum starting, CRs are now rising and will continue to rise. This will lead to increased cooling cloud cover per the CR theory. In order for this theory of cooling to work, I believe that a multiyear lag has to be in play since the high solar activity ended 13+ years ago.

    *Edited due to typo. CRs are increasing and are expected to continue to increase.
     
    Last edited: Apr 9, 2018
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  20. pcbjr

    pcbjr Supporter Member

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    Very humbly ...
    I wish I had just 1/10th of the grey matter you possess ... :rolleyes:
     
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  21. GaWx

    GaWx Supporter Member

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    Thanks, Phil. I don't know about the grey matter; but I just have so much passion about this once in 200+ year grand minimum, especially because of the unknowns as far as how much global cooling, if any of significance, this will ultimately lead to. We have a front row seat to watch and learn.

    Meanwhile, per the Solarham site, that very short-lived area of 2 tiny sunspots pretty far south didn't last long enough to be counted thus making it 10+ spotless days though it did count at SIDC. I just took a look at the prior cycle, which itself had been the quietest in ~100 years, and we're running significantly quieter at the same declining stage with about 60 of the last 100 days being spotless! So, we appear to continue to head toward a grand minimum which should at least be about as quiet as the Dalton Min of ~200 years ago. Keep in mind that we could easily still be 2 or so years from this upcoming cycle minimum and look how quiet it already is! It already has gotten about as quiet as, if not quieter than, the cycle min for several of the more active cycles (especially those of the mid to late 20th century). If we were already near cycle min, the current quiet wouldn't be a big deal. But because we're likely still ~2 years from next cycle min, it is a big deal.
     
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  22. GaWx

    GaWx Supporter Member

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    Here's a very interesting article related to the above mentioned short lived area of 2 tiny spots that didn't get even get counted per the Solarham site and that I noted was "pretty far south":

    http://sprg.ssl.berkeley.edu/~tohban/wiki/index.php/A_Sunspot_from_Cycle_25_for_sure

    Per this article, Cycle 25 has begun with that area, which had reversed polarity from what would have been expected from a Cycle 24 sunspot. Note also that I had said it was "pretty far south". That's because all of the recent spots were much closer to the equator. That one was in fact near 31S, which is near the latitude where the first spots of a new cycle typically appear.

    However, even IF this really is the start of Cycle 25, Cycle 24 has not ended as there is always overlap. Also, that doesn't mean the cycle minimum has arrived yet. As I had been saying, my feeling was that we were probably about 2 years or so from minimum and that it would be weak enough to be classified as (part of) a grand minimum. I'm not backing away from this at least yet. But IF we're already near minimum, then this would mean an epic bust for me as well as for many others including many very knowledgeable astrophysicists! It would mean Cycle 24 as measured from minimum to minimum would turn out to be a relatively short cycle of only 9.5-10 years.

    Typically, short cycles are strong, not weak like Cycle 24 has been. For this reason amongst others, I remain skeptical that we're already near a minimum. Perhaps this very weak and far south area was a very strange anomaly? Keep in mind that this short-lived area of tiny spots would have been very difficult to see in the 1800s, when we had the last grand minimum (Dalton).

    What if we really are already nearing the minimum....say by no later than early 2019? That would likely mean no grand minimum with this cycle minimum, a very surprising development. We'll see.
     
    Last edited: Apr 13, 2018
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