In 1804 the population of the earth was 1 billion people. It took 123
years to add another billion, then 33 years, then 14, then 12 to get the
population up to 6 billion by 1999 (source
https://www.learner.org/courses/envsci/unit/text.php?unit=5&secNum=4).
Now the human population is roughty 10.8 billion people (source
http://populationpyramid.net/world/2015/)!

I don't suppose all those people blowing CO2 into the atmosphere has
anything to do with this?

On 7/19/2015 10:08 PM, Eric Greenwell wrote:
Bruce Hoult wrote on 7/16/2015 9:38 PM:
On Tuesday, July 14, 2015 at 9:50:38 AM UTC+12, Martin Gregorie
wrote:
On Mon, 13 Jul 2015 14:09:42 -0700, David Hirst wrote:

A huge reduction in solar output is predicted to occur by
then.

Thankfully, they mean sunspot activity, not heat output, though
the lack of sunspots will likely cause some noticeable weather
changes.
(http://www.space.com/19280-solar-act...h-climate.html)

There may well be a connection: the Maunder Minimum, when there
were very few sunspots from 1645 to about 1715, coincided with the
middle part of the Little Ice Age (1350 to about 1850), during
which Europe and North America experienced very cold winters.
However, as AFAIK there was no good understanding of either IR or
UV radiation during the Maunder Minimum nor any reliable means of
measuring the amount of solar energy reaching the Earth, any
association between the two events is at best supposition, but
should it happen again we are now well enough instrumented to
discover what, if any, mechanism connects the two.

The theorized mechanism is fewer sunspots - less solar wind - more
cosmic rays reaching earth - more nucleation of aerosols - more
clouds - higher reflectivity - more energy radiation into space -
lower temperatures.

The key link in this chain (more cosmic rays - more nucleation of
aerosols) has been experimentally verified at CERN.

http://en.wikipedia.org/wiki/Henrik_...imat e_change


IPCC reports state that cloud reflectivity and proportion of cloud
cover is one of the most important and yet least understood aspects
of the global climate system.

"While the link between cosmic rays and cloud cover is yet to be
confirmed, more importantly, there has been no correlation between
cosmic rays and global temperatures over the last 30 years of global
warming. In fact, in recent years when cosmic rays should have been
having their largest cooling effect on record, temperatures have been at
their highest on record."

http://www.skepticalscience.com/cosm...termediate.htm




--
Dan Marotta