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NASA Goddard study suggests solar variation plays a role in our current climate

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Watts Up With That
Friday June 5th, 2009

NASA Study Acknowledges Solar Cycle, Not Man, Responsible for Past Warming

Report indicates solar cycle has been impacting Earth since the Industrial Revolution
From the Daily Tech, Michael Andrews. (h/t to Joe D’Aleo)

Some researchers believe that the solar cycle influences global climate changes.  They attribute recent warming trends to cyclic variation.  Skeptics, though, argue that there’s little hard evidence of a solar hand in recent climate changes.

[NOTE: there is evidence of solar impact on the surface temperature record, as Basil Copeland and I discovered in this report published here on WUWT titled Evidence of a Lunisolar Influence on Decadal and Bidecadal Oscillations In Globally Averaged Temperature Trends - Anthony]


NASA Goddard study suggests solar variation plays a role in our current climate 11265 sunspot numbers

Past studies have shown that sunspot numbers correspond to warming or cooling trends. The twentieth century has featured heightened activity, indicating a warming trend. (Source: Wikimedia Commons)

NASA Goddard study suggests solar variation plays a role in our current climate 11266 Solar Activity Proxies

Solar activity has shown a major spike in the twentieth century, corresponding to global warming. This cyclic variation was acknowledged by a recent NASA study, which reviewed a great deal of past climate data. (Source: Wikimedia Commons)

(ARTICLE CONTINUES BELOW)

NASA Goddard study suggests solar variation plays a role in our current climate 290509banner 

Solar activity has shown a major spike in the twentieth century, corresponding to global warming. This cyclic variation was acknowledged by a recent NASANASA Goddard study suggests solar variation plays a role in our current climate mag glass 10x10 study, which reviewed a great deal of past climate data. (Source: Wikimedia Commons)

Now, a new research report from a surprising source may help to lay this skepticism to rest.  A study from NASA’s Goddard Space Flight Center in Greenbelt, Maryland looking at climate data over the past century has concluded that solar variation has made a significant impact on the Earth’s climate.  The report concludes that evidence for climate changes based on solar radiation can be traced back as far as the Industrial Revolution.

Past research has shown that the sun goes through eleven year cycles.  At the cycle’s peak, solar activity occurring near sunspots is particularly intense, basking the Earth in solar heat.  According to Robert Cahalan, a climatologist at the Goddard Space Flight Center,

“Right now, we are in between major ice ages, in a period that has been called the Holocene.”

Thomas Woods, solar scientist at the University of Colorado in Boulder concludes,

“The fluctuations in the solar cycle impacts Earth’s global temperature by about 0.1 degree Celsius, slightly hotter during solar maximum and cooler during solar minimum.  The sun is currently at its minimum, and the next solar maximum is expected in 2012.”

According to the study, during periods of solar quiet, 1,361 watts per square meter of solar energy reaches Earth’s outermost atmosphere.  Periods of more intense activity brought 1.3 watts per square meter (0.1 percent) more energy.

While the NASA study acknowledged the sun’s influence on warming and cooling patterns, it then went badly off the tracks.  Ignoring its own evidence, it returned to an argument that man had replaced the sun as the cause current warming patterns.  Like many studies, this conclusion was based less on hard data and more on questionable correlations and inaccurate modeling techniques.

The inconvertible fact, here is that even NASA’s own study acknowledges that solar variation has caused climate changeNASA Goddard study suggests solar variation plays a role in our current climate mag glass 10x10 in the past.  And even the study’s members, mostly ardent supports of AGW theory, acknowledge that the sun may play a significant role in future climate changes.


NOTE: for those that wish to see the original NASA Goddard article which sparked both the Daily Tech and Science Daily news stories referenced above, you can read it here:

 

http://erc.ivv.nasa.gov/topics/solarsystem/features/solar_variability.html

- Anthony

This article was posted: Friday, June 5, 2009 at 9:02 am





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