Tag Archives: Solar cycle

New paper demonstrates that climate responds to short and long-term changes in solar activity

(Via the Hockey Schtick) A new peer reviewed paper published in The Holocene finds a significant link between solar activity and climate over the past 1000 years. According to the authors: “Our results suggest that the climate responds to both … Continue reading

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Posted in Solar | Tagged , , , | 143 Comments

The sun – still slumping

The latest solar cycle update graphs have been released by the NOAA SWPC today, and the anemic cycle 24 continues: The current count isn’t keeping up with the prediction line in red. Not only is the sunspot count low, so … Continue reading

Posted in Solar | Tagged , , , | 89 Comments

The Sun has changed its character

Guest post by David Archibald A number of solar parameters are weak, and none is weaker than the Ap Index: Figure 1: Ap Index 1932 to 2026 Figure 1 shows the Ap Index from 1932 with a projection to the … Continue reading

Posted in Solar, Spaceweather | Tagged , , , , , , , | 176 Comments

A quiet cue ball sun

Source: http://sdo.gsfc.nasa.gov/assets/img/latest/latest_4096_4500.jpg A couple of people have noticed (as did I) that the sun is essentially blank.

Posted in Astronomy | Tagged , , , , , , , | 110 Comments

NASA June 2012 Solar Cycle 24 Prediction

Compiled by Joe D’aleo WeatherBell via NASA MSFC The current prediction for Sunspot Cycle 24 gives a smoothed sunspot number maximum of about 60 in the Spring of 2013. We are currently over three years into Cycle 24. The current … Continue reading

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NASA/Hathaway’s updated solar cycle prediction – smallest in 100 years

…the predicted size makes this the smallest sunspot cycle in about 100 years (Updated 2012/05/01) From: http://solarscience.msfc.nasa.gov/predict.shtml The current prediction for Sunspot Cycle 24 gives a smoothed sunspot number maximum of about 60 in the Spring of 2013. We are … Continue reading

Posted in Science, Solar | Tagged , , , , , , | 134 Comments

New paper in the Journal of Atmospheric and Solar-Terrestrial Physics demonstrates that planets do not cause solar cycles

Planetary effects are too small by several orders of magnitude to be a main cause of the solar cycle. Argiris Diamantis writes in with this tip: Professor Cornelis de Jager from the Netherlands has put a new publication on his … Continue reading

Posted in Science, Solar | Tagged , , , , | 325 Comments

Solar Update March 2012

by David Archibald Figure 1: Heliospheric Current Sheet Tilt Angle 1976 – 2012 The heliospheric current sheet tilt angle is currently at 67°. Solar maximum occurs when it reaches 74° – so a little bit further to go.

Posted in Solar | Tagged , , , , , , , | 93 Comments

The sun is still in a funk: sunspot numbers are dropping when they should be rising

The sunspot number for February from SIDC is down again, to 33.1 Here’s the source of that data: http://sidc.oma.be/DATA/monthssn.dat So far, cycle 24 is significantly lower in SSN number that the last three cycles, in addition to having a delayed … Continue reading

Posted in Science, Solar | Tagged , , , , , , , , , | 137 Comments

Do Latest Solar Studies Confirm Upcoming Global Cooling?

Guest post by Matti Vooro I fully support the findings of  Jan –Erik Solheim , Kjell Stordahl and Ole Humlum and their very recent paper called The long sunspot cycle 23 predicts a significant temperature decrease in cycle 24  dated … Continue reading

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Quantifying the Solar Cycle 24 Temperature Decline

Guest post by David Archibald Three wise Norwegians – Jan-Erik Solheim, Kjell Stordahl and Ole Humlum – have just published a paper entitled “The long sunspot cycle 23 predicts a significant temperature decrease in cycle 24”. It is available online … Continue reading

Posted in Forecasting, Science, Solar | Tagged , , , , , , , | 210 Comments

Headlines over solar cycle 25 and potential global cooling

There’s a story about solar cycle 25, and a potential “mini ice age” in the UK Daily Mail by David Rose that is making headlines today, even hitting the Drudge Report. The headline is: Forget global warming – it’s Cycle … Continue reading

Posted in Climate data, Solar | Tagged , , , , , , , , , | 186 Comments

First Estimate of Solar Cycle 25 Amplitude – may be the smallest in over 300 years

Guest post by David Archibald Predicting the amplitude of Solar Cycle 24 was a big business. Jan Janssens provides the most complete table of Solar Cycle 24 predictions at: http://users.telenet.be/j.janssens/SC24.html Prediction activity for Solar Cycle 24 seemed to have peaked … Continue reading

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Solar-Terrestrial Power Update

By Paul L. Vaughan, M.Sc. The amplitude of Earth’s zonal winds is modulated by the solar cycle. Here’s a concise visual update based on the latest data: LOD’ = rate of change of length of day

Posted in Solar | Tagged , , , , , , | 204 Comments

Hathaway’s November Solar Prediction

By David Archibald Joe D’Aleo asked for my comments on NASA’s James Hathaway’s latest solar prediction, available here: http://solarscience.msfc.nasa.gov/predict.shtml When I read May 2013 for solar cycle maximum, I thought “That is my prediction”. But then at the bottom of … Continue reading

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BREAKING – major AAS solar announcement: Sun’s Fading Spots Signal Big Drop in Solar Activity

“If we are right, this could be the last solar maximum we’ll see for a few decades,” Hill said. “That would affect everything from space exploration to Earth’s climate.” Update: see the official press release here – “All three of … Continue reading

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American Astronomical Society to make ‘major’ solar announcement

From Space.com Astronomers will unveil a “major result” on Tuesday (June 14) regarding the sun’s 11-year sunspot cycle. The announcement will be made at a solar physics conference in New Mexico, according to an alert released today (June 10) by … Continue reading

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Latest solar cycle update from the Space Weather Prediction Center

SWPC updated their solar cycle progression page…looks like the levels have held since the big uptick in March.

Posted in Science, Solar | Tagged , , | 127 Comments