The next time someone screams about how carbon dioxide, or worse, methane, is causing all the global warming, show them this. Water vapor contributes 3.1 times more global warming effect than carbon dioxide and 8.3 times more global warming effect than methane.
At that, we’re well aware that Earth’s water vapor levels are rising.
Instead of railing against mankind, who certainly didn’t cause the last five global warming periods over the last 420,000 years, it’s far better to plant lots of trees to handle the CO2 that naturally rises during the interglacial periods. And NO, mankind didn’t cause those CO2 rises (in green), either.
Methane, by contrast, is mostly removed from the atmosphere by chemical reaction, persisting for about 12 years. So, NO, we do NOT need to use methane collection units on cattle! When I read that, I was floored that people could be that stupid.
As for the remaining “greenhouse gases,” their combined effect is minuscule and can be ignored.
Click the following graphic to see it full-size:
Meanwhile, effects such as the earth’s orbital eccentricity, axial tilt (obliquity), axial precession, apsidal precession, and orbital inclination, when examined through Fourier analysis, are a near-perfect match of both the Vostok ice core samples as well as benthic forams, used as a climate proxy, to reconstruct past climate by examining the stable isotope ratios and trace element content of the shells (tests).
Global temperature and ice volume can be revealed by the isotopes of oxygen, and the history of the carbon cycle and oceanic productivity by examining the stable isotope ratios of carbon; see ?18O and ?13C. The concentration of trace elements, like magnesium (Mg), lithium (Li) and boron (B),also hold a wealth of information about global temperature cycles, continental weathering, and the role of the ocean in the global carbon cycle.
Materials taken from the Earth have been studied to infer the cycles of past climate. Antarctic ice cores contain trapped air bubbles whose ratios of different oxygen isotopes are a reliable proxy for global temperatures around the time the ice was formed. Study of this data concluded that the climatic response documented in the ice cores was driven by northern hemisphere insolation as proposed by the Milankovitch hypothesis.
Analysis of deep-ocean cores and of lake depths, and a seminal paper by Hays, Imbrie, and Shackleton provide additional validation through physical evidence. Climate records contained in a 1,700 ft (520 m) core of rock drilled in Arizona show a pattern synchronized with Earth’s eccentricity, and cores drilled in New England match it, going back 215 million years.