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To: Star Traveler
The graph below disturbs me:

The divergence of things that had been closely tracking each other for the prior two cycles indicates that this current cycle may be unusual, and our prior models may not apply.

Going by the NASA/NOAA models, we are way overdue for the upswing of the next cycle (blue is actual, red is predicted):


44 posted on 12/16/2009 8:27:12 AM PST by PapaBear3625 (Public healthcare looks like it will work as well as public housing did.)
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To: PapaBear3625
You were saying ...

The graph below disturbs me ...

I'll give the description that went along with it, on that webpage for the other readers.

I also included another article (up above) which questioned if sunspots were going to disappear (they meant... "for good" ... LOL).

Do I know what's going on in the natural cycle of things (and maybe the "unnatural cycle" of things)... no... :-)



Description

This picture depicts the last three solar cycles as measured in solar irradiance, sunspot numbers, solar flare activity, and 10.7 cm radio flux. Solar irradiance, i.e the direct solar power at the top of the Earth's atmosphere, is depicted as both a daily measurement and a moving annual average. All other data are depicted as the annual average value.

The ~11 year solar magnetic cycle is a fundemental aspect of the sun's behavior and is associated with variations in total output and activity. Irradiance measurements have only been available during the last three cycles and are based on a composite of many different observing satellites. [1] However, the high correlation between irradiance measurements and other proxies of solar activity make it reasonable to estimate past solar activity. Most important among these proxies is the record of sunspot observations that has been recorded since ~1610. Since sunspots and associated faculae are directly responsible for small changes in the brightness of the sun, they are closely correlated to changes in solar output. Direct measurements of radio emissions from the sun also provide a proxy of solar activity that can be measured from the ground since such solar radiation is not substantially affected by the atmosphere. Lastly, solar flares are a type of solar activity that can impact life on Earth by affecting electrical systems, especially satellites. Flares only occur in the presence of sunspots, and hence the two are correlated, but flares are not directly tied to total solar luminosity.

Recently, it appears that solar irradiance is varying in ways that aren't duplicated by changes in sunspot observations or radio emissions. However, this conclusion is disputed. Some believe that shifts in irradiance may be the result of calibration problems in the measuring satellites.[1][2] These speculations also admit the possibility that a small long term trend might exist in solar irradiance, though the data chosen for this plot do not have a significant trend.[3] Also, the differences in flare activity over the three cycles would not be related to possible measurement artifacts in irradiance.

With respect to global warming, though solar activity has been at relatively high levels during the recent period, the fact that solar activity has been near constant during the last 30 years precludes solar variability from playing a large role in recent warming. It is estimated that the resdiual effects of the prolonged high solar activity account for between 18 and 36% of warming from 1950 to 1999.[4]


53 posted on 12/16/2009 8:53:43 AM PST by Star Traveler (The God of Abraham, Isaac and Jacob is a Zionist and Jerusalem is the apple of His eye.)
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