Daily Wisdom

June 24, 2007

Global Warming Caused by Sunspots

The following graph shows the apparent correlation between sunspot activity (jagged peaks) and the earth's surface temperature (red line). Please be reminded that we are only talking about a few degrees here, but the correlation of increasing temperature to increasing sunspot activity is remarkable. Special thanks to Cap'n Bob for putting this chart together.

More info HERE.


At 6/24/2007 9:25 PM , Anonymous JC said...

Earth's climate is very sensitive to solar activity. Sami Solanki at the Max Planck Insitute compared solar activity & temperatures over the past 1150 years and found temperatures closely correlate to solar activity. When sunspot activity was low during the Maunder Minimum in the 1600's or the Dalton Minimum in the 1800's, the earth went through 'small ice ages'. The sun has been unusually hot in the last century - solar output rose dramatically in the early 20th century accompanied by a sharp rise in global temperatures.

However, Solanki also found the correlation between solar activity and global temperatures ended around 1975. At that point, temperatures started rising while solar activity stayed level. This led him to conclude "during these last 30 years the solar total irradiance, solar UV irradiance and cosmic ray flux has not shown any significant secular trend, so that at least this most recent warming episode must have another source."

This is confirmed by direct satellite measurements that find no rising trend since 1978, sunspot numbers which have leveled out since 1950, the Max Planck Institute reconstruction that shows irradience has been steady since 1950 and solar radio flux or flare activity which shows no rising trend over the past 30 years.

The sun has been the primary driver of Earth's climate in the past but solar variations are conspicuous in their absence over the last 30 years of long term global warming.

At 6/24/2007 10:14 PM , Blogger Hawkeye® said...

So let me get this straight. What you're saying is... that for that last 1000 years (or perhaps thousands of years), solar activity was the driving force behind global warming. But then during the last 30 years or so, something else happened?

I assume you are suggesting that man-made CO2 has played a factor. Am I supposed to believe that human activity during the last 30 years will destroy the planet?

Give me a break.

At 6/25/2007 3:48 AM , Anonymous camojack said...

Naturally (literally) the warmth comes from the Sun.

Although I've researched this climate change thing pretty thoroughly, I found a website by a (15 year old) young lady in Maine who has apparently done more:
Ponder the Maunder
(I am impressed...)

At 6/25/2007 8:42 AM , Blogger Hawkeye® said...

Thanks for the link. She's done a lot of work indeed!

At 6/25/2007 8:07 PM , Anonymous Anonymous said...

Solar activity has dominated the solar system for 4.5 billion years. Life itself is the sum total of billions upon billios of natural experiments.

At 6/28/2007 1:22 PM , Blogger Hawkeye® said...

Uhh... I knew that.

(:D) Thanks for posting...

At 7/07/2007 9:37 PM , Anonymous Elroy said...

Here you go.




At 7/08/2007 10:43 AM , Blogger Hawkeye® said...

Since the Arctic ice cap is melting, but the water levels are not rising, I wonder where all that water is going to?...

"As climate shifts, Antarctic ice sheet is growing" --Los Angeles Times, May 20, 2005

"Antarctica ice cap thickens" --Pittsburgh Post Gazette, May 20, 2005

"Curt Davis (University of Missouri-Columbia) and his collaborators used satellite radar altimetry measurements from 1992 to 2003 to determine that, on average, the elevation of about 8.5 million square kilometers of the Antarctic interior has been increasing. The increasing elevation was then linked to increases in snowfall, which was translated into a mass gain of 45 ± 7 billion tons per year, tying up enough moisture to lower sea level by 0.12 ± 0.02 millimeters per year." --Davis, C.H., et al., 2005. Snowfall-driven growth in East Antarctic ice sheet mitigates recent sea-level rise. SciencExpress, May 19, 2005.

At 7/15/2010 11:27 AM , Anonymous viagra online said...

In my opinion the global warming can be caused by sunspots, so I agree with you, and if we don't start to protect the nature this trouble can expand.

At 11/06/2010 4:19 AM , Anonymous Global Warming Essay said...

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