A repeat of the Dalton Solar Minimum?

Also the Maunder Grand Solar Minimum


A repeat of the Dalton Solar Minimum?

J.H. Walker

This in reference to the Canadian Prairies being Buried in winter at the beginning of autumn.

I would suggest that exactly the same occurred, shortly before the end of Solar Cycle 11 and the start of Solar Cycle 12 during the Dalton Grand solar Minimum 1790 to 1820.

I would also suggest the same occurred during many of the cycles of Maunders starting around 1600 and continuing until 1740.


14 thoughts on “A repeat of the Dalton Solar Minimum?”

  1. Big difference between the Dalton minimum and today is globalisation! Already the US, Russia, Australia etc have had major crop losses! Our local famers have already diversified to suit the current markets but are they able to rediversify if needed say next year?
    I think that we will see empty shelves in stores sooner that expected?

  2. I am installing a big wood stove and getting off my propane heat. I have hundreds of trees on my property for fuel – self sufficiency will be key in the coming years.

  3. I’m curious about sun spot detection today vs during the Maunder or Dalton minimums. It seems to me that current detection equipment and strategies are detecting significantly more sunspots than was possible during the previous minimums. Occasionally testing even my credulity. Does anyone have a comparative analysis of this question?

    • I think this was discussed at spaceweathernews but Id need to check. And yes the early detection system would have been much courser. If only the large spots are recorded then the number now would be even less!

    • I still think that we need to look at the use of large greenhouses and even hydroponics for food in the near future. It may be true that it would be difficult to grow grain such as wheat this way but other food products can be grown. We can do it if we try.

    • This is disussed here:

      Comparisions of spot counts for SC14 a recovery cycle from the much lower SC 12 and 13. SC5 the first active cycle of Dalton and SC24 the first active cycle of this modern GSM

      This link dicusses spot spot detection history, but with regards to fragments state this:

      When it comes to observing specks there are two main players. The size of the aperture lens and the atmospheric conditions. Below is a list of what is possible in arc seconds from the appropriate lens diameter of a refractor type telescope.. This assumes perfect viewing and distortion free lenses. 1 arc second is equal to 725 kilometers on the solar surface.
      Diameter Arc sec Km
      40mm 2.93 2124
      50mm 2.32 1682
      70mm 1.66 1203
      80mm 1.45 1051
      110mm 1.05 735
      150mm .77 558

      Using the current SDO images it can be determined that the Sun is about 3800 pixels wide in the 4096 x 4096 images. The Sun is 1392000 kilometers across so each pixel measures 366 kilometers. The smallest specks recorded by Catania look to be about 700 kilometers across. If so the Wolf 80mm telescope on a perfect day with perfect optics is not capable of achieving this resolution, the 40mm aperture is nowhere near it. The current Wolfcam is also not capable of picking up the smallest specks that are counted today.

  4. The Dalton Minimum was a solar minimum not a grand solar minimum. But we can’t be sure yet which one we are heading for. The spotless days is already close to 2018 and standing at 74%. The previous minimum was two low years so I think what happens next year will be interesting.

    • Incorrect, Dalton is a named Grand Solar Minimum with four AMP affected solar cycles with SC12 and SC13 the prime pair of cycles.
      A Solar Minimum is the 3 to 4 year period on the decline of one cycle and a shorter period on the rise to Maximum of the next. The Solar Max peak although shorter, produces far more energy that is received by the earth than during the longer solar minimum.
      A solar minimum affect the Earth’s short term climate far more the maximum, this is due much reduced UV levels (16%) and the increase in massive long lasting Solar Coronial Holes which cause SAW events and lead to large Blocking High pressure systems like those which have affected weather systems at least in Europe since October last year. SAW event affect summer and winter, with drought like weather cold in winter and warm and dry in spring and hot in early summer.
      Thought out European weather history since the 10th Century extremes of weather during solar minimum periods, usually, drought and dependent on season, extreme cold to extreme Heat, the Gleissberg period 1890 to 1940 is a prime example.

  5. worried it will be so
    2nd yr in a row the night temps in oct are averaging the 5c mark
    seeds arent sprouting unless in greenhouses
    and weve just had a warmish day at last around 25c

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