On Monday, July 20, 2015 at 4:08:21 PM UTC+12, 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

That's an awfully ignorant argument.

Heating and cooling effects accumulate. June 21 has the most sunlight (in the Northern Hemisphere) descreasing after that, but it's usually far before the hottest days in July and August.

It is mathematically natural that at the end of a period of increasing temperatures you'll have a period of temperatures that are flat but at or near the maximum.

Failing to take account of the trend and notice that temperatures have ceased to increase, and simply continue to beat on the undeniable (and not denied) fact that temperatures are "the highest ever" is either mathematical ignorance or deception.