Climate Change Myths

Eclectic information and images of the Climate Change Facts ignored by scientists, politians and mainstream media...

Geological Timescale

Earth's temperatures rise followed by CO2 levels, not the other way around.

Projected CO2 Levels

Earth's temperatures rise followed by CO2 levels, not the other way around.

Ice Core Data from Anartica

No indication that Global Temperature will shoot up in response to large increases in CO2 from Human Emissions.

Temperatures & Global Emissions

Actual facts do not support Anthropogenic cause climate change (global warming).

5000 Years of Temperature Change

No indication that Global Temperature will shoot up in response to large increases in CO2 from Human Emissions.

CO2 Absorption Spectrum

There is no Valid Mechanism for CO2 Creating Giobal Warming

Sea Surface Temperature & Atmospheric CO2

Sea Surface Temperature & Atmospheric CO2

The Milankovitch Cycles

Mystery Cycles, or Wobbly Science

(Article from CDN - Climate Discussion Nexus)

Milankovitch Cycles, which seem important to some long-run natural climate cycles (yes, those again) during the most recent Ice Age, which appears to have started either 2.6 or 33 million years ago depending if you demand significant ice at both poles or only one. And the question got us thinking about Serbian geophysicist Milutin Milanković who challenged climate orthodoxy a century ago despite not being a “climate scientist” as some would define the term, by arguing that a series of wobbles in the Earth’s motion had a major impact on long-run climate because they altered the amount and impact of incoming solar radiation. And if so you’d think it would always have been true… and that alarmists wouldn’t be so determined now to pooh-pooh the concept of major solar influence.

The Milankovitch matter is a mathematical mess because our planet’s motion is variable in three main ways: eccentricity, obliquity and precession. Uh, that’d be that the orbit varies between nearly circular and slightly elliptical over about 400,000 years if you believe Wikipedia and 100,000 if you believe NASA, and when the orbit is less round there’s more seasonal variation. Also that it wobbles on its axis on roughly a 41,000-year cycle, and the more it tilts, the more sunlight hits high altitudes in summer, also increasing seasonal variation. And that its ellipse around the sun shifts in roughly a 26,000 year cycle, meaning that it’s sometimes nearer Sol in Northern Hemisphere winter and sometimes in Northern Hemisphere summer which matters because there’s more land in the Northern Hemisphere and land absorbs more heat than sea.

Got it? Well, not entirely, because there’s also apsidal precession and orbital inclination. You can Google that stuff. And should if you think climate change is “simple physics” in this or any other way.

Collectively the impact is clearly significant. In its page on “Milankovitch (Orbital) Cycles and Their Role in Earth’s Climate”, NASA says this pioneering climate skeptic:

“examined how variations in three types of Earth orbital movements affect how much solar radiation (known as insolation) reaches the top of Earth’s atmosphere as well as where the insolation reaches. These cyclical orbital movements, which became known as the Milankovitch cycles, cause variations of up to 25 percent in the amount of incoming insolation at Earth’s mid-latitudes (the areas of our planet located between about 30 and 60 degrees north and south of the equator).”

Before letting you slide into heresy, they offer a handy “further reading on why Milankovitch cycles can’t explain Earth’s current warming here”. And it’s a bit of a wobbly circle since the main point is that while climate is complex and multifactorial, they know it’s CO2 because they know it’s CO2:

“Today, however, it’s the direct input of carbon dioxide into the atmosphere from burning fossil fuels that’s responsible for changing Earth’s atmospheric composition over the last century, rather than climate feedbacks from the ocean or land caused by Milankovitch cycles.”

QED. They also say the cycles operate over the long term and this warming happened fast. But who knows what tipping points a long-term cycle might trigger? After all, when the glaciers retreat, they do it fast as part of a long-term cycle. So for our part we’re more open-minded.

Complete Article Links:

More Information: Nasa: