According
to a recent Popular
Science video and article, a 2⁰C
increase in temperature will cause the Earth to be a lot drier Earth, but one
which also will have increased “extreme precipitation” events, such as the
National Climate Assessment says has occurred “in every region of the
contiguous states since the 1950s.” It
claims that “droughts and heat waves have also intensified, as is evident in
California, which in recent years has seen less rain, drier soil, and the spread
of wildfires.” The United Nations ascribes to this same viewpoint.
It
fails to note that for a few hundred years prior to 200 years ago, California
was also drier than it has been in the last couple hundred years. It does note that the world’s surface is 70%
ocean. It fails to note that a 2⁰C temperature increase would cause more
water to evaporate from the oceans, which has to be cycled back to the surface
as more rain and snow. It fails to note
that much of the warmer land on the Earth’s surface is covered with rainforest,
which is hardly dry. It fails to note
that the driest land areas on the Earth are those in very cold regions near the
poles. Is it not logical that warming
the polar regions might make them less dry?
And one must not forget that this is the water planet with 71% of its
surface covered with water, both ocean and fresh water.
The
video and article state that:
“The last time the Earth was as warm as it is now was over 11,000 years ago. Oceans covers 70% of our planet, and it takes a lot of energy to heat up that much water, not to mention the air and land. So a two-degree increase in the average global temperature means that temperature increases across the board are a lot more than 2°C.”
This
statement ignores the Medieval Warm Period, the Roman Warming, and the Minoan
Warm Period, which were as warm, or warmer, than the present moment -- a moment
brief as yet compared to those much longer periods and one not yet clearly
established as climate rather than just weather. It was not observed that when California was
previously drier than in the last couple hundred years, the Little Ice Age was
underway.
And what
does that foolish third sentence in the quote above mean? The average is the across the board
temperature. Yes, if the Earth were to
warm, the warming would be greater in some areas than other areas. There is a tendency for the warming to be
greater over land areas and to be greater where the temperature is colder than
where it is warmer. The tropics would
not warm up as much as would areas of land at higher latitudes because water
evaporation tends to limit the temperature increase. However, the third sentence in the quote
does not say this. It is nonsense.
There are
many natural cycles that cause the climate to change. As I have shown in numerous articles on this
blog, the physics used to claim catastrophic effects due to man-made global
warming caused by carbon dioxide emissions is very wrong. There is as yet no empirical or experimental
evidence that further increases in the concentration of carbon dioxide in the
atmosphere will cause significant global warming. It may well actually cause an insignificant
cooling for reasons I have discussed a number of times.
What we
do know for sure is that more carbon dioxide in the atmosphere will greatly aid
plant growth, making it easier for us to feed a growing human population. Unlike many of the anti-human proponents of
the idea that man is destroying the Earth, I think a growing human population
is a good thing, at least if we can see to it that most of them are free to use
their minds and free to be productive.
Apparently,
the increased rain events noted in this foolish article and video are to be the
precipitation of anhydrous water, which will create terrible droughts.
Is it
perhaps the case that part of the reason the Industrial Revolution got underway
when it did is because the Little Ice Age was ending? Warming on Earth is usually a good thing for
mankind, not a bad thing. But note that
those hawking alarmist and catastrophic man-made effects on climate love to
start the reference clock at the end of the Little Ice Age. We are still warming as a result of the end
of that cooling period primarily due to the large heat capacity of our oceans.
Thanks to
Prof. Howard “Cork” Hayden for bringing this article and video to my attention.
Update on 12 June 2018: Prof. Howard "Cork" Hayden's The Energy Advocate for June 2018 has a brief discussion of a paper by J. Warren Beck, et al., "A 550,000-year record of East Asian monsoon rainfall from 10Be in loess, " Science 360, May 25, 2018, that shows that higher rainfall results from higher temperatures.