Category Archives: Solar

Weakest solar wind of the space age and the current “mini” solar maximum

From the new paper by McComas et al. The last solar minimum, which extended into 2009, was especially deep and prolonged. Since then, sunspot activity has gone through a very small peak while the heliospheric current sheet achieved large tilt … Continue reading

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Posted in Solar | 78 Comments

‘unexpected link between solar activity and climate change’ found in Greenland ice

Lund University have published a reconstruction of solar activity vs snow accumulation in Greenland, which indicates a strong correlation between solar minima and a colder climate. ‘The study shows an unexpected link between solar activity and climate change,’ Dr Muscheler … Continue reading

Posted in Paleoclimatology, Solar | 100 Comments

Revising the Sunspot Number

“AZleader” writes at “Inform the pundits”. Austin, August 16, 2014 – A rare spotless day on the sun on July 17-18, 2014 triggered public speculation that an already stunted Cycle 24 was nearly over. Such is not the case. Defying … Continue reading

Posted in Solar | 265 Comments

A Gleissberg Solar Minimum?

Allan MacRae says: Thanks to Alberta Jacobs In a recent paper “The Centennial Gleissberg Cycle and its Association with Extended Minima”, to be soon published in JGR/Space, Feynman and Ruzmaikin discuss how the recent extended minimum of solar and geomagnetic … Continue reading

Posted in Solar | 475 Comments

Recent paper finds 1950-2009 Solar Grand Maximum was a ‘rare or even unique event’ in 3,000 years

Sun said to be “bi-modal” While many, including the IPCC, suggest the modern Grand Maximum of solar activity from 1950-2009 has nothing to do with the 0.4C global warming measured over that time frame, it does seem to be unique … Continue reading

Posted in Climate News, Solar | 451 Comments

Solar cycle 24 – magnetic activity down, twin peaks seem certain

NOAA’s Space Weather Prediction Center (SWPC) has published its latest graphs for the month of July, and while sunspot and radio flux numbers showed little change and increased respectively, the Geomagnetic Ap index is back near the bottom again. Further, … Continue reading

Posted in Solar, Spaceweather | 27 Comments

A bigger worry than ‘global warming’ and more damaging – a Carrington class solar event

From PhysicsWorld blog: The cover feature of the August issue of Physics World, which is now out in print and digital formats, looks at the Sun – and in particular, at the consequences here on Earth of a “solar super-storm”. … Continue reading

Posted in solar flare, Spaceweather | 215 Comments

Solar Cycle Driven Ocean Temperature Variations

What Slow Fourier Transforms can tell us. Guest essay by Stan Robertson, Ph.D., P.E. On May 3, 2014, an article on WUWT by Willis Eschenbach entitled, The Slow Fourier Transform (SFT) was posted. As he noted, the amplitude of the … Continue reading

Posted in Radiation, Solar, statistics | 210 Comments

Record levels of solar ultraviolet measured in South America

From Frontiers A team of researchers in the U.S. and Germany has measured the highest level of ultraviolet radiation ever recorded on the Earth’s surface. The extraordinary UV fluxes, observed in the Bolivian Andes only 1,500 miles from the equator, … Continue reading

Posted in Solar | 88 Comments

Solar Notch-Delay Model Released

Readers may recall the contentious discussions that occurred on this thread a couple of weeks back. Both Willis Eschenbach and Dr. Leif Svalgaard were quite combative over the fact that the model data had not been released. But that aside, … Continue reading

Posted in Modeling, Solar | 633 Comments

A Cool Question, Answered?

Guest essay by David Archibald A couple of years ago the question was asked “When will it start cooling?” Of course solar denialists misconstrued this innocent enquiry. There is no doubt – we all know that lower solar irradiance will … Continue reading

Posted in Global cooling, Solar | 711 Comments

Maunder and Dalton Sunspot Minima

Guest Post by Willis Eschenbach In a recent interchange over at Joanne Nova’s always interesting blog, I’d said that the slow changes in the sun have little effect on temperature. Someone asked me, well, what about the cold temperatures during … Continue reading

Posted in Climate News, Solar | Tagged , , , , , , , | 1,018 Comments

Solar Update June 2014 – The sun is still slumping along

Guest essay by David Archibald The following is a series of graphs that depict the current and past state of the sun.

Posted in Solar | 332 Comments

New study suggests a temperature drop of up to 1°C by 2020 due to low solar activity

From the HockeySchtick:  A paper published today in the Journal of Atmospheric and Solar-Terrestrial Physics finds long solar cycles predict lower temperatures during the following solar cycle. A lag of 11 years [the average solar cycle length] is found to provide … Continue reading

Posted in Solar | 144 Comments

Sunspots and Sea Surface Temperature

Guest Post by Willis Eschenbach I thought I was done with sunspots … but as the well-known climate scientist Michael Corleone once remarked, “Just when I thought I was out … they pull me back in”.  In this case Marcel … Continue reading

Posted in Solar | Tagged , , , , | 459 Comments

Chinese study ‘implies that the “modern maximum” of solar activity agrees well with the recent global warming’

From Science China Press  [h/t to Mark Sellers] Has solar activity influence on the Earth’s global warming? A recent study demonstrates the existence of significant resonance cycles and high correlations between solar activity and the Earth’s averaged surface temperature during … Continue reading

Posted in Global warming, Solar | 205 Comments

Solving sunspot mysteries

From the New Jersey Institute of Technology  and Big Bear Solar Observatory  (video follows) Multi-wavelength observations of sunspots with the 1.6-meter telescope at Big Bear Solar Observatory (BBSO) in California and aboard NASA’s IRIS spacecraft have produced new and intriguing … Continue reading

Posted in Solar | 41 Comments

Well, Color Me Gobsmacked!

Guest Post by Willis Eschenbach I’ve developed a curious kind of algorithm that I’ve humorously called “slow Fourier analysis”, but which might be better described as a method for direct spectral analysis. The basic concept is quite simple. I fit … Continue reading

Posted in Solar | Tagged , , , | 167 Comments

It’s The Evidence, Stupid!

Guest Post by Willis Eschenbach I hear a lot of folks give the following explanation for the vagaries of the climate, viz: It’s the sun, stupid. And in fact, when I first started looking at the climate I thought the … Continue reading

Posted in Solar | Tagged , , | 668 Comments

The Effect of Gleissberg’s “Secular Smoothing”

Guest Post by Willis Eschenbach ABSTRACT: Slow Fourier Transform (SFT) periodograms reveal the strength of the cycles in the full sunspot dataset (n=314), in the sunspot cycle maxima data alone (n=28), and the sunspot cycle maxima after they have been … Continue reading

Posted in Climate News, Solar | Tagged , , , | 54 Comments

Dial M for Maunder

Guest essay by David Archibald The Maunder Minimum was not completely devoid of sunspots, as shown by the following graphic using data from SIDC. Will global warming be attenuated due to our current low solar activity?

Posted in Solar | 109 Comments

The Tip of the Gleissberg

Guest Post by Willis Eschenbach A look at Gleissberg’s famous solar cycle reveals that it is constructed from some dubious signal analysis methods. This purported 80-year “Gleissberg cycle” in the sunspot numbers has excited much interest since Gleissberg’s original work. … Continue reading

Posted in Solar | Tagged , , | 96 Comments

Sailing on the Solar Wind

Guest Post by Willis Eschenbach The lack of cycles in the solar wind isn’t surprising when you analyze this paper. There is very little sign of any kind of annual cycle, which makes perfect sense because the sun doesn’t run … Continue reading

Posted in Solar, solar flare | Tagged , , , | 82 Comments

Solar wind to lightning strike link discovered

From the Institute of Physics: High-speed solar winds increase lightning strikes on Earth Scientists have discovered new evidence to suggest that lightning on Earth is triggered not only by cosmic rays from space, but also by energetic particles from the … Continue reading

Posted in Cosmic rays, lightning, Solar, Spaceweather, Weather | 55 Comments

Studies: Weaker solar activity means colder, and colder also means drier

Guest essay by David Archibald There were two papers published in 2013 that, when considered together, paint a bleak picture of North American climate and agriculture for the rest of the century and beyond. Firstly from the abstract of “Multidecadal … Continue reading

Posted in Agriculture, Climate News, Drought, Solar | 215 Comments

Solar Cycle Update – M class flare, little change in metrics, solar dynamo still slumping

From NASA Mid-level Solar Flare Erupts from the Sun May 8, 2014 The bright light on the left side of the sun shows an M5.2-class solar flare in progress on May 8, 2014.This image, captured by NASA’s SDO, shows light … Continue reading

Posted in Solar, solar flare | 123 Comments

New paper finds solar UV-B output is correlated to global mean temperature

Map of correlations suggest it may be affecting biomass and planetary albedo. From the Hockey Schtick: A paper published today in Methods in Ecology and Evolution describes a new satellite dataset of solar UV-B radiation for use in ecological studies. According … Continue reading

Posted in Albedo, Biomass, Science, Solar | 87 Comments

Solar Periodicity

Guest Post by Willis Eschenbach I was pointed to a 2010 post by Dr. Roy Spencer over at his always interesting blog. In it, he says that he can show a relationship between total solar irradiance (TSI) and the HadCRUT3 global … Continue reading

Posted in Solar | Tagged , , , , , , | 293 Comments

March solar activity, down slightly, still lower than last solar cycle 23

The solar data from the NOAA Space Weather prediction center has been posted, and like the global temperature, there isn’t much change. Sunspot numbers are down slightly, but still up from most of 2012/2013. The double peak looks more prominent. … Continue reading

Posted in Solar, Spaceweather | 160 Comments

Bigger things to worry about than global warming: Scientists say a destructive solar blast narrowly missed Earth in 2012

Video follows of the July 23rd, 2012 Coronal Mass Ejection, said to be the fastest ever From UC BERKELEY — Earth dodged a huge magnetic bullet from the sun on July 23, 2012. According to University of California, Berkeley, and … Continue reading

Posted in Solar, solar flare | 71 Comments

Sun’s energy output may have led to marked natural climate change in Europe over the last 1000 years

From Cardiff University Sun’s energy influences 1,000 years of natural climate variability in North Atlantic Changes in the sun’s energy output may have led to marked natural climate change in Europe over the last 1000 years, according to researchers at … Continue reading

Posted in Paleoclimatology, Solar | 213 Comments

The Sun wakes up: highest values of Solar Cycle 24 observed in February 2014

The updates from NOAA’s SWPC are now available, and there are big jumps all around in February 2014. Sunspot number reaches the highest ever for SC24:

Posted in Science, Solar | 183 Comments

Strongest X class solar flare since March 2012

From NOAA Space Weather Prediction Center and Strong Solar Flare Radio Blackout Newly numbered Region 1990 (the return of old Region 1967), just now rotating into view, produced an R3 (Strong) Solar Flare Radio Blackout at 0049 UTC on … Continue reading

Posted in Solar, solar flare, Spaceweather | 25 Comments

The $2.2 Billion Bird-Scorching Solar Project At California’s Ivanpah Plant

It’s not just Wind Turbines that kill wildlife, from the Wall Street Journal: “A giant solar-power project officially opening this week in the California desert is the first of its kind, and may be among the last, in part because … Continue reading

Posted in Green tech, Solar | Tagged , , , | 241 Comments

An end to the ‘Modern Warm Regime’ identified from TSI data?

Dr. Sam Outcalt : Emeritus Professor of Physical Geography, University of Michigan writes in with an analysis of the recently revised TSI Data from the University of Colorado as mentioned on WUWT here. He notes that elements of his analysis … Continue reading

Posted in Solar | 49 Comments