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Sun and global warming

stubeeef

stubeeef

macrumors 68030
Original poster
Aug 10, 2004
2,715
4
more coming to "light"
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Increased output from the Sun might be to blame for 10 to 30 percent of global warming that has been measured in the past 20 years, according to a new report.

Increased emissions of carbon dioxide and other heat-trapping gases still play a role, the scientists say.

But climate models of global warming should be corrected to better account for changes in solar activity, according to Nicola Scafetta and Bruce West of Duke University.

The findings were published online this week by the journal Geophysical Research Letters.

Scientists agree the planet is warming. Effects are evident in melting glaciers and reductions in the amount of frozen ground around the planet.

The new study is based in part on Columbia University research from 2003 in which scientists found errors in how data on solar brightness is interpreted. A gap in data, owing to satellites not being deployed after the Space Shuttle Columbia disaster, were filled by less accurate data from other satellites, Scafetta says.

The Duke analyses examined solar changes over 22 years versus 11 years used in previous studies. The cooling effect of volcanoes and cyclical shifts in ocean currents can have a greater negative impact on the accuracy of shorter data periods.

"The Sun may have minimally contributed about 10 to 30 percent of the 1980-2002 global surface warming," the researchers said in a statement today.

Many questions remain, however. For example, scientists do not have a good grasp of how much Earth absorbs or reflects sunlight.

"We don't know what the Sun will do in the future," Scafetta says. "For now, if our analysis is correct, I think it is important to correct the climate models so that they include reliable sensitivity to solar activity. Once that is done, then it will be possible to better understand what has happened during the past hundred years."
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Heres the real reason for global warming

Its all explained here
 

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Makes you wonder if the sun is going to continue to increase the output - but regardless, its right in line with Murphy's Law - couldn't be a better time to increase the wattage on the sun with all the extra greenhouse gasses around. You'd think it'd be nice to save these events for the iceages.

As for pirates, I'm thinking there were more than 17 pirates in 2000....

D
 
The problem with the theory of global warming is that the "equation" for it contains so many variables, many for which we have only a small amount of data and some for which we have ZERO data... and any single variable has the potential to push the global temperature toward a minimum or a maximum.

I'm not saying we should continue to gush endless quantities of CO2 into the atmosphere... but we should continue to refine our understanding of what factors contribute to the mean surface temperature of the Earth, so that we can learn how to influence the temperature both down AND up, should circumstances warrant it.
 
The funny thing is...

When we have record highs... everybody thinks the world is over heating

When we have record lows... everybody thinks its the return of the ice age.
 
w_parietti22 said:
The funny thing is...

When we have record highs... everybody thinks the world is over heating

When we have record lows... everybody thinks its the return of the ice age.
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Who thinks that??

Back to the subject, this could be kind of a shot to environmentalists. Not good.
 
CanadaRAM said:
Yeah, and everyone will skim over the bit that says that 70 - 90% of global warming is due to terrestrial causes.
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Environmentalists won't, but people who run big businesses/ big polluting companies will use that 10-30% to their advantage.
 
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