Solar Cycle 25 Blog

Posted by Co2sceptic on Jun 25th 2012

A rebuttal to Weather Underground statement

“In the last 35 years of global warming, sun and climate have been going in opposite directions.”

First of all, Dr Jeff Masters, as a PHD in METEOROLOGY and someone running a business, is someone is naturally have respect for. You don’t accomplish what he has without having to face an overcome challenges. So I look at this differently than some of the ignorant or deceptive missives from others I have challenged before on this site, many from the climatologists that make statements that show me they don’t look at the weather.

Lets look at the last 400 years of sunspot cycle

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Posted by Co2sceptic on Jun 13th 2012


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 predicted size makes this the smallest sunspot cycle in about 100 years.

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The prediction method has been slightly revised. The previous method found a fit for both the amplitude and the starting time of the cycle along with a weighted estimate of the amplitude from precursor predictions (polar fields and geomagnetic activity near cycle minimum). Recent work [see Hathaway Solar Physics; 273, 221 (2011)] indicates that the equatorward drift of the sunspot latitudes as seen in the Butterfly Diagram follows a standard path for all cycles provided the dates are taken relative to a starting time determined by fitting the full cycle. Using data for the current sunspot cycle indicates a starting date of May of 2008. Fixing this date and then finding the cycle amplitude that best fits the sunspot number data yields the current (revised) prediction.

Posted by Co2sceptic on Jun 13th 2012

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The solar flare which erupted on March 7 was the most powerful eruption ever observed by Fermi's Large Area Telescope (LAT).

The flare, classified as X5.4, made the sun briefly the brightest object in the gamma-ray sky.

"For most of Fermi's four years in orbit, its LAT saw the sun as a faint, steady gamma-ray source thanks to the impacts of high-speed particles called cosmic rays," says Nicola Omodei, an astrophysicist at Stanford University in California. "Now we're beginning to see what the sun itself can do."

At the flare's peak, it was emitting gamma rays with two billion times the energy of visible light, or about four billion electron volts - easily setting a record for the highest-energy light ever detected during or immediately after a solar flare.

Posted by Co2sceptic on May 14th 2012

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Figure 1: Reconstruction of precipitation amounts for the edge of the Tibet Plateau. The bars on the chart depict prominent weak phases of solar activity, which correspond to Om = Oort Minimum; Wm = Wolf Minimum; Sm = Spörer Minimum; Mm = Maunder Minimum; Dm = Dalton Minimum). Figure from: Sun & Liu (2012).

Yet another study has appeared in the Journal of Geophysical Research, this one looks at the precipitation history on the Tibet Plateau of the last 1000 years.

Geologist Dr. Sebastian Lüning and chemist Prof. Fritz Vahrenholt have written a summary of this paper, which I’ve translated in the English.