The ice-cores clearly show a climate cycle of short clear-skied warm-ages followed by 110,000-year ice-ages full of volcanic-dust. Note the clear inverse relationship between volcanic dust and climate. The more volcanic ash/dust, the colder the planet gets. Also, note how fast temperatures fell after previous warm ages.
Here is an explanation for why climate cycles occur, and how the world as we know it will end when global warming runs its course and the next ash-filled volcanic ice age begins.
2) There can be no doubt that CO2 levels are rising, that the Earth is warming, and that these two things are correlated. But perhaps one of these things doesn’t drive the other. Perhaps both are driven by a third thing, namely volcanic activity, or leakage from our planet’s molten center.
If we look at any volcanic eruption, we will see how our planet contains lots of high pressure gas that blasts out and propels lots of hot material into the atmosphere. Aside from surface water contamination, this new volcanic air is 95%-96% CO2, exactly like the atmospheres of our sister planets Mars and Venus. So clearly with volcanos at least, CO2 leakage is related to heat leakage.
3) Imagine a freshly opened bottle of soda water. Imagine the bubbles of CO2 slowly coming out of the gassed liquid and rising to the surface. In a similar way, primordial CO2 gas constantly bubbles out of Earth’s molten center as froth to replenish the atmosphere and replace the CO2 constantly lost to buried seashells for example.
The gassy or frothy nature of volcanic rock is obvious. Also, this rock was once very hot and filled with new volcanic air that was 95.5% CO2. So in bubbly volcanic rock we see a source of both heat and CO2.
4) Now consider Earth’s 80,000-km long seafloor rift system. This is a sort of linear volcano that accretes about 6cm of hot magma each year as new sea floor. Because this accreted magma comes up as a froth, the seafloor rift leaks vast amounts of both heat and CO2-rich new volcanic air.
Aside from gas buoyancy, can you think of another reason why super-hot magma would rise from deep within our planet and accrete to the seafloor rift? Clearly the seafloor rift is propelled by rising gas bubbles escaping from deep within our planet. And clearly this gas comes up as a froth, as is so typical of the magma we see ejected onto the surface of our planet.
5) The high-pressure gassy rock froth tends to rise and build-up under the lithosphere, Earth’s hard shell. However, at the sea floor rift, these bubbles need to be much more highly pressurized than the water 2.5-kilometers down—about 249-atmospheres. If the volcanic gas is not more highly pressurized, it will not be able to overcome the back pressure of the oceans and escape.
6) This super high-pressure volcanic froth is what builds up and then explodes from volcanos, frequently bringing up vast amounts of material. For example, the Toba eruption 74,000 years ago exploded up to 2,800 cubic kilometers of material into the Atmosphere. The Taupo eruption 26,500 years ago exploded 1,170 cubic kilometers of material. Also, these dates precisely match the dates of the volcanic ash peaks (and climate bottoms) in the first graph herein.
7) The propellant for Volcanos is the same high pressure magma froth that rises at the seafloor rift. However, at the rift, the gas-part of the froth steadily bleeds off into the high-pressure water, while the magma-part rapidly cools and accretes to the seafloor rift thus driving seafloor spreading, earthquakes, volcanos and continental drift.
With volcanos, the outgassing froth is prevented from escaping most of the time. Thus most of the time, it builds up pressure. Then periodically there is a leakage event—a volcanic eruption for reasons we will get to shortly. This leakage causes a rapid expansion of gas in excess of 250-fold. This rapid gas expansion tends to blow-apart and aerosolize most of the rock froth that contains the gas. The rapid expansion of gas over a widening radius (sub-lithosphere) also explains why most volcanos erupt over days and weeks instead of exploding instantaneously. It also explains explosive eruptions.