January
2015,
May
2017.
CLIMATE
COMMENT
NOTE. Figures are mostly from Wikipedia, and the figure might no longer exist in Wikipedia. However most figures were from peer reviewed sources.
Commenters
(aka
"commentators")
in
the
popular press tend to get facts about climate wrong. e.g. Paige Taylor
in The Australian P5, 5th September 2016 made the natural assumption
that the last Ice Age
ended just before Aboriginals built stone houses about 9,000 years ago.
ABSTRACT
I will not detail the negative effects that such (9C) cooling
would
have on the human race. Suffice to say, it makes the warmist's
concerns about a 3C rise look like a Sunday School picnic.
I hope for my grandchildren's sake that our efforts at causing
global warming will serve to reduce that cooling. Because I have
the gut feeling that if something has happened for over 2 million
years with clockwork regularity, and if nobody has a credible
explanation as to why it has been happening, then it is more likely
than not that it is going to continue happening.
THE
AGREED FACTS
1. GLOBAL ICE AGE TIMELINE.
From
geological,
fossil
and
carbon
dating
evidence,
scientists
believe
that
the
Earth
has
experienced at least four “Ice
Ages” in it's 4.5 billion year existence. We are currently in the
fifth ice age. Figure 1 is a graph from
Wikipedia showing ice ages in colour. I have created Table 1
below to provide details of ice age dates.
Huronian |
Cryogenian |
Andean-Saharan |
Karoo |
Current |
2,400 - 2,100 MYBC |
850-635 MYBC |
460-430 MYBC |
360-260 MYBC |
2.6 MYBC to now. |
Table
1 Dates of the known ice ages.
The Cryogenian was reputedly the coldest ice age. There is
discussion among scientists as to whether glaciers reached the equator
= "Snowball Earth" or perhaps that some oceans at the equator were
still water = "Slushball Earth". In between ice ages it is
believed that there were periods when tropical conditions existed at
the poles.
At
the moment the average depth of ice on Antarctica is about 2,160
meters, spread over an area of 14 million square kilometers. The
area of the world's oceans is 360 million square kilometers. So
if all of the ice on Antarctica melted, the sea level would rise
something less than 2,160 * 14 / 360 which is 84 meters. NASA reports 83 billion
tons of ice as melting each year (2014) from W Antarctica (the bit that
is losing mass). Ice weighs slightly less than 1 tonne per cubic
meter. So if we spread 80 billion (80 x 10^9) cubic meters of
melted ice over 360 million square kilometers = 360 x 10^12 sq meters
of ocean, the sea level would rise by: {Vol=Area x Height, so H=V/A} So
H = (83 * 10^9) / (360*10^12) meters which is 2.3 * 10-4 meters which
is less than 1/4 of a millimeter per annum, or about an inch per
century.
Put
another way, if the annual loss of ice from the Antarctic ice sheet was
rained onto Queensland it would produce 5 mm (20 points) of rain which
would not break the drought.
2. CURRENT ICE AGE
TIMELINE
The current Ice Age started approximately
2,600,000 years ago. Anthropologists agree, more or less, that is
about when Homo Sapiens (aka Humans) first appeared on planet
Earth. Figure 2 from Wikipedia shows
temperatures over the last five million years plotted as hotter or
colder than the annual world's mean today, which is the dotted "zero"
line near the top.
THINGS TO NOTICE:
ICE CORES
In
the last few decades scientists have drilled deep (3,190 meters) into
ice lakes in Antarctica. By analysis of the material of these
"ice cores" they were able to determine relative temperatures and sea
levels over the last 800,000 years.
This sequence followed an earlier cycle of glacials/interglacials having a period of 46,000 years. (Shown in mid RHS of Fig. 2).
Typically during interglacial periods (i.e. right now, 2015AD) the average global temperature rises by 7C – 9C. (13F – 16F).
The Ice Core results are shown in Figures 3, 4 and 5.
Figure
5
A
more extended view (800,000 years) of the EPICA results.
THINGS TO NOTICE
We
are currently in the Holocene (interglacial) period of the Quaternary
Ice Age. The Holocene
started about 10,000 – 12,000 years ago. (Figure 6). It is typical that
the sea level rises during an interglacial period by around 110 meters
or 360 feet. So over the last 2 million years the sea level was
normally 110 meters lower than it is today.
Beside being colder, the weather during a glacial period is less turbulent and rainfall is greatly reduced. Reduced rainfall on the few "temperate" zones that would presumably exist (having migrated into the tropics) would likely make Agriculture difficult.
It is not considered to be a coincidence that the earliest recorded instances of agriculture in Egypt, India, China & Mesopotamia are dated at around 10,000 – 12,000 years ago. When the last cold period ended.
The black line is
the average of 10 different studies. It can be seen (Fig 5) that
the temperature rose steeply by about 12C (22F) to our present day
temperature over the previous 5,000 years. It can be seen that
the cooling trend (0.5C/8,000y) of the last 8,000 years has recently
halted. That warming is ascribed by some authorities to the fact
that the CO2 concentration has risen from 0.028% to 0.04% in the last
century.
From Wikipedia. Shows reconstructed proxy temperature studies from ten sources covering the last 2,000 years. The data seem to illustrate that the industrial revolution (1760) coincided with the end of the "Little Ice Age" (or perhaps staved off the end of the Holocene interglacial period.)
In the last few decades the planetary
temperature has risen by about 0.5C. The evidence for planetary
temperatures over the last 130 years as displayed by Fig. 8 is disputed. There are
recent challenges to the data "adjustment" procedures used by climate
scientists who prepared the graph.
WHAT ARE THE FACTS?
COMMENT:
The
warmist website "skepticalscience.com"
has
published
the
Vostok
data,
(Top
of Fig 3 above) and dismissed the
idea that the current 10,000 years old interglacial is ending.
They reason that
"The cycle appears to be
a response to changes in the Earth’s orbit and tilt" and
continue:
Countering those points from skeptical:
Footnote. * Arrhenius equation as modified for IPCC2001
is: dT = SConst * Ln(C/Co) where dT is Temperature change, and C/Co is
the ratio of CO2 concentration, and SConst is the sensitivity.
AN EXAMPLE CALCULATION of SENSITIVITY CONSTANT
Below I show in three cases how sensitivity could be calculated.
I obtained the
Temperatures from Fig. 8 above, and obtained CO2 concentrations
from cdiac.ornl.gov
Case 1. Temperature rise 1910 to 1940 -0.6C to -0.1C =
0.5C.
CO2 from 299.3 to 310.4 ppm. SConst = 0.5/Ln(310.4/299.3) =
13.7
Case 2. Temperature rise 1940 to 1980 -0.1C to -0.05C = 0.05C.
CO2 from 310.4 to 338
ppm SConst
= 0.05/Ln(338/310.4) = 0.02
Case 3. Temperature rise 1880 to 2016 -0.3C to +0.5C =
0.8C. CO2 from 289.8 to 400 ppm
SConst = 0.8/Ln(400/289.8) = 2.48
As can be seen, the choice of time period can have a huge effect on
the calculation of sensitivity. And looking at all the data,
there does not seem to be a very strong correlation (as Arrhenius
suggests) between CO2 concentration and temperature.
In Figure 9 below I have used the IPCC formula (Arrhenius) to
calculate the
temperature rise (dT) for future CO2
levels of 500 ppm and 600 ppm starting from the present level of
400ppm using the IPCC formula with different "sensitivity" constants:
dT
=
Sensitivity
*
Ln(CO2/400)
dT =
Sens.Const * Ln(CO2/400) |
CO2 = 500ppm |
CO2 = 600 ppm |
Sensitivity
Const. = 13.7 |
dT = 3.1C |
dT = 5.6C |
Sensitivity
Const. = 2.48 |
dT = 0.56C |
dT = 1.0C |
Figure 9
Of course, other elements will serve to exacerbate or diminish
warming. This model assumes solar insolation remains
constant. It is predicted to fall due to predicted reduced
sunspot activity. In that case, the world might actually get
colder.
(Note to self: Buy on wool futures)
ARGUMENT
Scientists
do not agree on
what causes the warming that causes interglacial periods,
or
the
cooling
that
ends interglacial
periods. Consider:
So at
the very least, Skepticalscience.com's certainty that the ice will not
come back soon is
open to dispute.
There is no evidence that the outcome of global warming is bad. Very few warmists consider less than a 2C rise to be alarming. Most warmists consider more than 5C rise would be catastrophic. They appear to ignore the fact that during the last interglacial period 100,000 years ago the temperature was 3-5 C above it's present value.
The
main thrust of their alarm seems to be (a) Sea level rising, (b)
inclement weather and (c) problems resulting from ocean acidification.
WHERE NEXT?
Our world is not well organised. The UNFAO estimates that 870 million people suffer from undernourishment, and UNWFP estimates that around 3 million children under 5 starve to death each year. At the same time, rich greenies in their massive SUVs drive up the world price of grain by turning it into ethyl alcohol and using it as a substitute for gasoline.
Alternative energy supplies are subsidised by taxes on carbon energy. That makes electricity more expensive. Power being more expensive, the poorest and most vulnerable members of our society freeze in winter and roast in summer.
And those alternative energy supplies have their own problems. Wind farms produce infrasonic sound, which has tentatively been established as producing health problems. (See peer reviewed report by Steven Cooper). Solar cells require rare earths, which produce extremely poisonous pollution in their production.
These evils are so unnecessary. As a Libertarian I believe that if Governments would keep out of the way, and stick to the job of taxing poisonous pollutants, technology would solve those problems. In solar cell technology the price is falling and efficiency is rising at such a rate that already solar electricity can be produced for an amortised cost of 10 - 12 cents per KWH. All we need is an energy storage system. A recent article by Giles Parkinson reports that power storage costs should drop to $230/KWH by 2018. The author cites Citigroup, HSBC and UBS as having estimated that at that price, fossil fuels will go into “terminal decline”.
But no. It seems that no government in the world can resist a tax that can be promoted to the voters as a "moral imperative". And a carbon tax appears to fit that bill. Without one, we are told, our children will inherit a barren world.
“But surely,” you say, “this proof of climate change is based on sound, peer reviewed scientific research by reputable scientists?” Again I cite the EPICA abstract from Nature:
"Given the similarities between this earlier warm period and today, our results may imply that without human intervention, a climate similar to the present one would extend well into the future."
Personally I do
not consider that such a tentative conclusion by a body promoted as
consisting of possibly the most authoritative group of climate
scientists in the world can be used by governments to justify the
levying of taxes equivalent to 2%** of Gross World Product.
According to
the world factbook, world GDP (PPP basis) was $75 trillion in
2013. So they recommend a tax of nearly $2 trillion per year,
(growing with inflation..)
Pickering?
** a forever tax equivalent to 2% of world GDP would be required to
stabilize CO2 at 0.05% according to Nicolas Stern, author of the Stern
Review.
email
barvennon@hotmail.com