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View Poll Results: What impact will the sun's deep minima have on the future climate?
Climate getting progressively cooler through next solar cycles 263 44.88%
No impact 132 22.53%
Global warming is here to stay 95 16.21%
Calm before the solar storm of 2012-2013 96 16.38%
Voters: 586. You may not vote on this poll

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10-07-2018, 19:38   #646
Elmer Blooker
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Originally Posted by dolanbaker View Post
The Earth's magnetic field is the main line of protection from external radiation reaching the surface.
Sunspots are simply an indication of how active the sun's magnetic field is, and the sun's field enhances the Earth's magnetic field.

So therefore a lower magnetic field around the sun will result in a weaker field around the Earth which means less protection from radiation = more cosmic rays.
"Less protection" meaning what for us mere mortals? There may be disruption to electronics as gctest pointed out but I think we'll survive like we have done before during deep solar minima.
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10-07-2018, 19:54   #647
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Small increases in risk of things line skin cancer and other radiation related issues.
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10-07-2018, 20:05   #648
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Increases in cloud cover from more cosmic rays. So basically heavier rain in the low pressure systems and even as some say more lightning strikes from thunderstorms from cosmic ray seeding.

https://phys.org/news/2016-08-solar-...rth-cloud.html
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12-07-2018, 18:42   #649
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The quietest sun since 2009

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The sun is blank today for the 15th straight day which is the longest stretch without sunspots since November 2009 when the sun was emerging from the deepest solar minimum in a century. This year the sun has been blank 52% of the time which is the most in a given year since the 71% that took place in 2009. The last solar minimum actually reached a nadir in 2008 when an astounding 73% of the year featured a spotless sun - the most spotless days in a given year since 1913 - and the longest consecutive streak in 2008 reached 52 days according to spaceweather.com. All indications are that the upcoming solar minimum may even be even quieter than the last one.
https://www.perspectaweather.com/blo...sun-since-2009
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15-07-2018, 12:19   #650
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Yesterday, we equalled 2017's number of spotless days and now there is 105 spotless days in 2018. Currently, there has been 18 consecutive days without any sunspots.

This image is from yesterday.



http://www.spaceweather.com/
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18-07-2018, 09:32   #651
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THREE WEEKS WITHOUT SUNSPOTS: The sun has been blank for 21 days--3 whole weeks without sunspots. To find an equal number of consecutive spotless days in the historical record, you have to go back to July-August 2009 when the sun was emerging from an unusually deep solar minimum. Solar minimum, welcome back!

Spotless Days
Current Stretch: 21 days
2018 total: 108 days (55%)
2017 total: 104 days (28%)
2016 total: 32 days (9%)
2015 total: 0 days (0%)
2014 total: 1 day (<1%)
2013 total: 0 days (0%)
2012 total: 0 days (0%)
2011 total: 2 days (<1%)
2010 total: 51 days (14%)
2009 total: 260 days (71%)
2008 total: 268 days (73%)
2007 total: 152 days (42%)
2006 total: 70 days (19%)

http://www.spaceweather.com/archive....h=07&year=2018
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03-08-2018, 16:53   #652
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July 2018 had the lowest monthly sunspot number since August 2009.

The blue line is every month's sunspot number from January 2006 to July 2018 whilst the red line is the 13 month running average for sunspot numbers.



Data comes from SILSO.

Last edited by sryanbruen; 03-08-2018 at 16:57.
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14-08-2018, 04:29   #653
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10 consecutive days on the blink now -



From Spaceweather.com:

SOLAR MINIMUM CONDITIONS ARE IN EFFECT: The sun has been without sunspots for 44 of the past 47 days. To find a similar stretch of blank suns, you have to go back to 2009 when the sun was experiencing the deepest solar minimum in a century. Solar minimum has returned, bringing extra cosmic rays, long-lasting holes in the sun's atmosphere, and strangely pink auroras.

Will be interesting to see how this affects the winter, if at all...
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14-08-2018, 13:55   #654
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...... and some of the days when the sun is "active" is dubious in my opinion.
I found this in the archives - July 22nd was a day when the sun was considered "active"? Sunspot 2716 is so tiny its invisible but it says current stretch: 0 days!
http://www.spaceweather.com/archive....h=07&year=2018
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14-08-2018, 17:23   #655
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Another day blank and Solar flux is down to 68 from 70 yesterday, 132 days blank so far, should push easily above 200 by years end.
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14-08-2018, 18:38   #656
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Quote:
Originally Posted by Elmer Blooker View Post
...... and some of the days when the sun is "active" is dubious in my opinion.
I found this in the archives - July 22nd was a day when the sun was considered "active"? Sunspot 2716 is so tiny its invisible but it says current stretch: 0 days!
http://www.spaceweather.com/archive....h=07&year=2018
Days like that would have certainly been marked as blank in the past.
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31-08-2018, 12:54   #657
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2 days blank on the sun again after a run of sunspots, talk of solar cycle 25 kicking in already? The latest spot or two seemed to have reverse polarity indicating this may be the case. Regardless, activity looks to be cooling off again. Sfu at 71.
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31-08-2018, 19:35   #658
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how is solar output tracked in terms of what the earth receives in energy from the sun? is it showing any cycling in line with the sunspot cycles?
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31-08-2018, 19:56   #659
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how is solar output tracked in terms of what the earth receives in energy from the sun? is it showing any cycling in line with the sunspot cycles?
Some nice charts here.
http://spot.colorado.edu/~koppg/TSI/index.html


This one appears to have the TSI for the past few decades from a collection of instruments, without trying to correct errors between them.



Same chart with corrections to variance in instruments.
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02-09-2018, 15:33   #660
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4 days without a sunspot http://www.spaceweather.com/

Small eruption from the 13th of August.

Solar Dynamics Observatory, nasa.

The video of the two hours condensed:
https://twitter.com/NASASun/status/1035907632286982144
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