Category Archives: Solar

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

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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 spaceweather.com: 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

Historical and present Total Solar Irradiance has been tinkered with again

One of the big problems of climate science is uncertainty. Some things that always seem to be in flux are historical datasets, partly because, well, they have so much inherent uncertainty built in. Such is the case of the Historical … Continue reading

Posted in Solar | 184 Comments

January solar cycle 24 numbers, a new high for one, continued slumps for others

The NOAA Space Weather Prediction Center released their January 2014 solar data, and it has one small surprise, the 10.7 radio flux is the highest ever in cycle 24, the other metrics, not so much. SSN has been about where … Continue reading

Posted in Solar | 210 Comments

BBC runs 6 excellent minutes on quiet sun and past correlation with Little Ice Age

Guest post by Alec Rawls Nice hype by Matt Drudge, whose three linked quotes are all from the BBC’s one brief paragraph of text, but the accompanying video (full transcription below) is more substantial, with scientists talking about the likelihood … Continue reading

Posted in Climate News, Solar | 294 Comments

New study claims low solar activity caused “the pause” in global temperature – but AGW will return!

This is on a tip from Dr. Leif Svalgaard, WUWT’s resident solar expert. It was just published in the journal Atmospheric and Climate Sciences, and is open access. I found this study’s conclusion a bit amusing, because there are numerous … Continue reading

Posted in Climate News, ENSO, Hiatus in Global Warming, Peer review, Science, Solar | Tagged , , | 180 Comments

The Solar storm has arrived – initial impact weaker than expected

From NASA: Spaceweather: As expected, a CME hit Earth’s magnetic field on Jan. 9th (around 20:00 UTC or 3 p.m. EST). Although the initial impact was weaker than expected, geomagnetic storms could still develop as Earth passes through the CME’s … Continue reading

Posted in solar flare, Spaceweather | 57 Comments

Upwelling Solar, Upwelling Longwave

Guest Post by Willis Eschenbach The CERES dataset contains three main parts—downwelling solar radiation, upwelling solar radiation, and upwelling longwave radiation. With the exception of leap-year variations, the solar dataset does not change from year to year over a few … Continue reading

Posted in Climate data, Radiative Imbalance, Solar | Tagged , , | 348 Comments

X class solar flare ejection may hit Earth with solar storm

From the WUWT Solar Reference page, an X 1.2 event has occurred: From NASA Spaceweather: Giant sunspot AR1944 erupted on Jan 7th at approximately 1832 UT, producing a powerful X1-class solar flare. First-look coronagraph images from the STEREO-Ahead spacecraft appear … Continue reading

Posted in Solar, solar flare, Spaceweather | 104 Comments

On The Stability and Symmetry Of The Climate System

Guest Post by Willis Eschenbach The CERES data has its problems, because the three datasets (incoming solar, outgoing longwave, and reflected shortwave) don’t add up to anything near zero. So the keepers of the keys adjusted them to an artificial … Continue reading

Posted in Climate data, Radiative Imbalance, Solar | Tagged , , , , | 306 Comments