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Benjamin Jullien's avatar

Interesting how that kind of "climate realism" posts ALWAYS tend to trigger denialist rants in the replies (and little genuine debate, if any)

Scott Snell's avatar

Most so-called "denialists" really aren't. Only a fool would deny climate change, because the climate changes all the time, and always has. this thing we call "climate" is an enormously complex, chaotic system with innumerable interconnected, highly dynamic components and hundreds and hundreds of variable inputs. The nature of such a system is constant change. Really, we're just arguing about how much human activities, principally adding extra CO2 through widespread combustion, affect that system. Some say a little, some say a lot. A few have even described this trace gas as the "control knob" for the climate, an egregious oversimplification.

The role of CO2 in climate has been grossly exaggerated. It is objectively a minor component. Yes it is a greenhouse gas, but a minor one. The most important, by far, is water vapor, which is responsible for up to 95 percent of overall GHE. The proportion of CO2 in the atmosphere has increased by a little over one part per ten thousand over the last century, but this has resulted in only about a 0.7 percent increase in radiant energy reaching the surface, according to the IPCC. That's a tiny, probably negligible change. It' certainly not a crisis.

This leaves aside entirely the major greening effect of higher levels of CO2. Since 1980, there has been at least a 20 percent global increase in plant mass due to the increased CO2 levels. This is good news that has been all but ignored by the mainstream media.

Climate change is a thing because it's always a thing. Human civilizations right and left have crashed when the climate changed abruptly. But here's the thing: It was never the heat that was the problem. The greatest periods of human flourishing have occurred during periods of relative warmth. But then it turns cold, the crops fail, people huddle together for warmth, aiding the spread of disease, economies collapse, all is in ruins.

We're in a warm period right now, and flourishing as never before because of it. This warmth is a gift, yet we treat it as an existential threat. Insanity.

Our planet isn't too hot, it's too cold. Right now our planet is colder than 95 percent of its history. We are in the middle of an ice age, the most intense in at least 250 million years. There are massive ice caps at both poles. this occurs very rarely in Earth history.

By chance, we happen to be alive during an interglacial period, a rare period of remission in which glacial conditions abate, and the climate moderates. These periods come along about every 120,000 years or so, and last, on average, about 10,000 years. The Holocene ("wholly recent,") the current interglacial, is about 12,000 years on, and is showing unmistakable indicators of winding down. Climatologically speaking, we are in the "neoglacial" part of the Holcene. That's the part right before the ice comes back. For the next 100,000 plus years.

It's not the heat we have to worry about, it's the cold. If we're really lucky, the tiny bit of heat our activities have added may fend off the next glacial outbreak for a few precious decades or centuries. But don't hold your breath. Sooner or later the ice will come back, and it will be the worst thing ever to happen to humanity.

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