Tags: mini max, solar maximum, Sunspot
By this time we should be at Solar Maximum with the sun looking as if it has acne. Instead the suns complexio is only sullied by the occasional blemish.
At the same time the average 10.7 flux should be around 160-170 with peaks over 300. What is it today? the value reported on the “Layman’s Sunspot Count” is just 105.
Neutrons are well up compared to the last cycle, so the solar wind is weaker. In the Graph above negative figures relate to lower numbers of Neutrons, normally seen around solar max, you can see that 2002 to 2004 the average (on this scale) was about -7. Now 11 years on (when we’d expect a olar Maiximum in the number of sunspots the Neutron counter is at -1 over the last 12 months which equates to a much weaker Solar Wind
It seems we may have passed solar max, if so I think we may have some more interesting winters ahead in the UK
Tags: Solar Cycle 24
Around February of this year (2011) it finally looked as though the current Sunspot Cycle was taking off, with multiple complex sunspots producing Coronal Mass Ejections (CME) and the sun looking fairly peppered with spots. Four months later, we’ve had a relapse, going by the Laymans Sunspot Count we are falling back into the trough of a quiet sun.
Of particular concern to Radio Amateurs like myself is the fall off in the 10.7 flux associated with sunspots, throughout the last couple of months, it got over 100, now, it’s back in the mid 80’s, a level normally associated with a Solar Minimum, not half way up the ramp to a maximum. So what maximum should we expect? The NASA scientists, led by Hathaway have consistently revised downwards the expected maximum, now it’s around 50, and that’s in 2 years time.
Also the majority of spots seem to be Unipolar, as distinct from complex spots more likely to create CME’s. As you can see above, just a single spot rotating over the face at the moment
Perhaps someone should tell the sun
Tags: Dalton Minimum, Maunder Minimum, Solar cycle, Sunspots
I’ve come across a very good site here. In it, there is some serious discussion regarding the calculation of the Sunspot Number, and it’s deviation from the original Wolf number. If you have the opportunity have a look, a fascinating site, well presented.
One very nicely organised piece is on the “Layman’s Sunspot Count”, trying to correct the two counts taken as being the official view, and correcting them by removing specks that, in previous times, would not have been seen even with telescopes
Tags: Climate, Dalton Minimum, Jetstream, Maunder Minimum, Sunspots
We may, if we are lucky see a rare thing in the next few days, it is just possible that a sunspot may appear as the sun rotates round, the SOHO Behind satellite seems to be recording activity at high latitude, which should indicate a cycle 24 spot. We are now at day 13 of the current spotless run, we had a brief 4 day spotted run before this current spell, but before that we had a full 52 days without any spots at all.
This year to date we have had 206 spotless days, that’s 80% of the days this year (not that the sun knows what one of our years is), with a total of 717 spotless days since 2004. The average number of spotless days since records began is 485 days, so we are climbing the listings for quiet cycles.
There have been various comments about the strength of this cycle with much criticism of Hathaway at NASA. What has happened is that his forecast is early, as he had forecasted a much quieter cycle 25 rather than 24. The last 3 cycles, 21, 22 and 23 were strong and short, although 23 was weaker than 22 and 22 was weaker than the big 21, but now the sun has switched off, at least as far as sunspots are concerned. There was a period earlier in the year where it looked as though this cycle was starting to take off, but that lasted just over 2 months and the slumber resumed.
What does this do to the climate? Records show that during the Dalton minimum and the earlier Maunder Minimum parts of Western Europe had shorter growing seasons and much colder winters. Parts of the Northern American Plains In the US and Canada were also substantially cooler. This year, many US Mid West States were substantially cooler than the norm. Parts of the UK have had a washout of a summer, with a jetstream that has been consistently further south than is normal for the time of year. Viewing the way the climate has behaved in both the Northern and Southern Hemispheres this year, it seems that the warmer weather from sub tropical zones seems to be drawn closer to the equator, with the colder polar zones expanding, from the poles, giving a small net cooling of the whole planet, but with large regional variations.
Tags: Climate Change, Global Warming, Solar cycle, Solar Wind, Sunspots
Data provided on websites over the last few weeks seem to indicate that, as the Sun takes a rest during solar Cycle 24, UV Radiation has dropped by about 6%. I think this 6% is quite a drop, especially if you look and see that Total Solar Irradiance (TSI) only varies by between 0.05 to 0.1% over a Solar Cycle. This variation in TSI is thought to be too insignificant to affect climate, but what of the UV Decrease?
It’s well known that the majority of UVB and almost all UVC Radiation is absorbed by the upper atmosphere, mainly by ozone. But this radiation is, after absorption, re-emitted as black body radiation. Black body radiation is taken to be emitted in any direction, which means at least 50% is passed towards space, where it may be absorbed and re-emitted again.
Associated with this drop in UV is a decrease in the diameter of the atmosphere. NASA have said that satellites are experiencing less atmospheric drag when in low orbit (low orbit being between 120 and 200 Km above the surface). This means that there is less atmosphere, at the edges, to intercept UV.
So what if Carbon Dioxide is not the primary driver of climate variations? Perhaps UV plays a much larger role than previously thought. Perhaps, with a suitable lag due to the heatsink that is the oceans, we will see a much larger drop in Global temperature than is currently expected.
If you have any reliable data concerning the absorption and re-emission of UV in the upper atmosphere, I would appreciate seeing it
Tags: Dalton Minimum, Maunder Minimum, NASA, Sunspot Cycle
Sunspots, nothing of great interest to most people on this small rock spinning around it’s nearest stellar object. But perhaps we should take more notice, especially as there seems to be proven evidence of multiple cycles happening within the sun.
As a radio amateur (Ham radio), I was looking forward to the start of the coming cycle, Cycle 24 as it gives people like me a chance to speak to people in distant lands without using kilowatts of power. Cycle 24 is, or will be when it gets going, part of the cycle that occurs event 11 years, well, 11years is an average, cycle 23, now on it’s last legs has lasted almost 13 years. Cycle 24, first predicted to be bigger than Cycle 23, has struggled just to get going. There have benn a few “proper” sunspots, many microspots that last just a couple of hours or days, but the sun has had more days when it has presented us with a face devoid of spots than 1933.
When will Cycle 24 take off? Well, don’t bet on it starting tomorrow. And in the past, a spot free sun has been linked to colder weather, are we about to see that Global warming was a scam?
Watch this space
Tags: Dalton Minimum, Maunder Minimum, Solar cycle, wattsupwiththat
So here we are at the start of 2009, OK already almost 25% through the year, but, Temperatures are down, worldwide. Forget the idea that ice is melting, this year, look at facts, not hearsay. So why do I think the “Global Warmers” have got it wrong?
1) we are at the end of a solar cycle, the “Little Ice Age” happened at the Maunder Minimum where there were very few sunspots for a period of over 60 years.
2) The other known time of temperature decreases was the Dalton Minimum, which although nowhere near as long or as strong as the Maunder minimum did produce an overall decrease in world temperature.
3) The sun appears too have “switched off”, see this graph from the excellent wattsupwiththat notice the drop in activity in 2005, given it seems that a 3 year gap translates to a cooling, we are well on our way.
4) An unprecedented, at least in the last 35 years, Stratospheric warming is indicative of further cooling to come for the Northern hemisphere during this winter
5) The PDO (Pacific Decadal Oscillation) looks as though it will be negative for 2009, again leading to an overall decrease in temperature.
6) El Nino is the past, La Nina seems to be the dominant process for 2009 as it was for 2008.
7) Despite all the Global Warmers comments, the Antarctic, as a continent is gettingt colder, NOT warmer and ice is accumulating in greater quantities rather than not forming during the Antarctic winter. Western Antarctic needs to be looked at with a wider view, as the volcanoes under the ice COULD have a significant effect on surface temperature.
Add these facts together and what do you have? Global cooling to a point that will arrest, overall, the retreat of glaciers worldwide. Ther may still be some areas on the planet that get warmer, but overall, cooler is the trend and a miniscule change in global temepreature will be enough to stop the retreat