Four Interglacials

10/11/2019 12:05 - Posted by Tom van Leeuwen
This picture is part of a very interesting paper by independent researcher Brian Catt about the effects of magma and volcanism on the ocean heating through glaciation cycles.
The graph of 4 Interglacial Data Sets was created by James Covington.

It shows the temperature for the last four interglacial periods. Each interglacial has it's own color:

  • Red - The Holocene, from 18,000 years ago until today ("We are here...")
  • Green - The Eemian , from 136,000 years ago until 110,000 years ago
  • Blue - Interglacial "MIS 7", from 245,000 years ago until 219,000 years ago
  • Purple - Interglacial "MIS 9", from 343,000 years ago until 317,000 years ago

The depicted periods are long enough to show not only the interglacials themselves but also their onset and decay into the following glacial periods.

The horizontal axis shows the time range for each interglacial in the corresponding color. The vertical axis shows the absolute temperature at the right-hand side and the difference from the current temperature on the left.

The data is obtained from ice cores from Greenland and Antarctica. The names for each source dataset are mentioned in the graph. These are commonly accepted datasets, used by climate scientists as a proxy for average global temperatures.

Observing this graph, the first thing that catches the eye is the large difference, 28 °C, between the coldest episodes of the glacial periods and the warmest peaks of the interglacials. During these fluctuations, life on Earth adapted to the ever-changing climate, improving after every throwback and finally producing our modern society.
Taking this into account, it's clear that the forecasts made by some scientists, bureaucrats, politicians, the mainstream mass media, 16-year olds, your government and the global government about an apocalyptic warming of 2 °C, tipping points, and a runaway -irreversible- warming into Venus-like conditions are a huge exaggeration.

Our current "Global Warming" is the small uptick marked with the "We are here..." arrow. The natural transition from the Little Ice Age into the Current Warm Period is clearly visible. When you take a closer look, all four graphs sport this ongoing zig-zag movement, with three or four peaks every thousand years. The current peak is no different than the rest of the all-natural, zig-zag peaks over the past 300 thousand years. There are lots of sudden, all-natural, warming and cooling periods much more extreme than the current one.

There is nothing "strange" with the current warming; nothing abnormal. The same pattern has been repeating itself over and over again, for natural causes, every 200 to 250 years.

One last observation. The interglacials Eemian and MIS 9 show almost the same temperature progression. The Holocene had a strange start, the so-called Younger Dryas, but started to follow the other two after that period.
MIS 7 starts with exactly the same progression as Eemian and MIS 9, but shows a strange cooling period, possibly due to four violent volcanic eruptions 233,000 to 230,000 years ago: first the Emmons Lake Caldera in today's Alaska, followed by the Reporoa Caldera, Maroa Caldera and Rotorua Caldera on what's now called New-Zealands Northern Island. After that, it's temperature progression catches up with Eemian and MIS 9.
If the Holocene follows the progression of the previous three interglacials, the Earth is due for a gradual cooling of 7 to 9 °C over the next 5 thousand years. The CO2 emitted by human activity might keep the CO2 greenhouse effect saturated for some time, mitigating the process and prolonging the benevolent climate of the Holocene that played a fundamental role in human development.

Tom van Leeuwen, October 11th, 2019.


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The fingerprints of the greenhouse effect

The hypothesis of "man-made climate change" tells us that the increase in the concentration of CO2 enhances the greenhouse effect of the atmosphere and has global warming as a final result.

Since the beginning of the industrialized era around 1850, man emits relatively large amounts of CO2 into the atmosphere through the use of fossil fuels. The consequence of these emissions is that during that period, the concentration of CO2 in the atmosphere increased sharply from about 300 parts per million to more than 400 ppm, an increase of almost 40%. The average temperature increased in the same period more or less 1.5 °C with a small variation depending on the data source used.

Why did the warming stop?

The political reports of the IPCC are based on the hypothesis that CO2 is the most important control knob of the Earth's temperature. The problem is that this hypothesis does not correspond at all with the empirical data available to science. Forecasts are made using models that are not capable of 'predicting' the past.

Temperature versus CO2 – the big picture

When discussing “Climate Change” it’s good to have an understanding of how the Earth’s climate has changed in the past. That will give us a reference to decide whether the current changes are normal or not.

Global temperatures have varied a lot over the last 500 million years. Depending on the timescale used, the current temperature is either cold or hot, so when you want to know the “normal temperature” you’ll have to indicate what timescale you’re using.

An estimation of the human influence on the climate

The month of May has come to an end. Another month of economic paralysis and reduced human CO2 emissions. And again, the CO2 concentration in the atmosphere continues to rise to record levels in modern measurements.

It is time to remove the blindfolds and thoroughly analyze the question of the effect of human CO2 emissions on global temperature. I propose to divide the problem into four issues, open for discussion:

Sydney Sea-Level Rise

According to the IPCC CO2-hypothesis, rising CO2-levels leads to warming. That warming supposedly expands sea-water and melts glaciers and polar ice-caps, finally resulting in rising sea-levels. They warn us for catastrophic sea-level rises in the year 2100 and beyond because of this process.

Sydney is strategically located between the Indian, Pacific, and Southern oceans. CO2-levels went up from 300 to 400 parts per million over the past 100 years. What's the impact on Sydney's sea-level?

Democracy? Make your choice!

In recent centuries the power of governments has become stronger and stronger. The governments got involved increasingly deeper into our lives and the citizens, the individuals, have ever less to say about ever more issues.

Climate policy is an excellent example of this interference. The government relies on completely unreliable data, unproven hypotheses, and ideas while the consequences of this interference affect everyone. At present, governments worldwide are about to make cheap and reliable energy sources -that form the basis of our economic prosperity- inaccessible. The results are far-reaching.

Censored and kicked by a Facebook group!

Yesterday I decided to post my Four Interglacials to a Facebook group called "Global Warming Denialism is a Big Oil agenda".

It was an educational experience.

About consensus, "97%", and settled science

There are four misconceptions about science that are commonly used by catastrophic man-made warming advocates. Normally, when you try to start a conversation on the subject, their first reply will be one of these four "arguments".