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CMIP6: Not-so-sudden stratospheric cooling

Real Climate

So SSU me Like MSU trends, these records reflected a weighted average of atmospheric temperatures, and the three SSU channels progressively weight higher levels in the stratosphere, roughly centered on 30km, 40km and 45km above the surface but with quite a bit of overlap. But why is the stratosphere increasingly chill?

Cooling 297
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The CO2 problem in six easy steps (2022 Update)

Real Climate

The fact that there is a natural greenhouse effect (that the atmosphere restricts the passage of infra-red (IR) radiation from the Earth’s surface to space) is easily deducible from; i) the mean temperature of the surface (around 15ºC) and, ii) knowing that the planet is normally close to radiative equilibrium.

Radiation 354
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New Climate Research From a Year-Long Arctic Expedition Raises an Ozone Alarm in the High North

Inside Climate News

Warming of the surface of the Arctic is matched by a colder polar vortex high in the atmosphere, which is speeding the breakdown of the Earth’s shield against ultraviolet rays.

Ozone 145
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The definitive CO2/CH4 comparison post

Real Climate

But methane’s role in atmospheric chemistry and as a source of stratospheric water vapour means that it has a bigger effect on climate than just the direct effect of its concentration. Before we go any further though, we need to understand that the effective perturbation time for CO 2 and CH 4 in the atmosphere are very different.

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Clauser-ology: Cloudy with a chance of meatballs

Real Climate

He, however, goes seriously off the rails when he estimates the impact of clouds on the radiation budget. We can measure directly how much solar radiation arrives at the Earth and once you spread it over the surface of the Earth, there is about 340 W/m 2.

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What Exactly is Ozone? The Good, the Bad & the Ugly

Breezometer

Our ozone layer serves as a lifesaving UV barrier for planet earth, functioning to absorb most of the sun’s ultraviolet radiation. At the same time, ground-level ozone pollution is extremely harmful to human health. Good Ozone’: Our Essential Sun Shield. How is Ozone Created?

Ozone 98
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Scanning the cosmos for signs of alien technology

Physics World

They do this by analysing the electromagnetic absorption spectra of an exoplanet’s atmosphere as it transits its sun, seeking the presence of gases such as oxygen, methane, water vapour and ozone (a proxy for oxygen). Analogous to technosignatures, these are the signs of life on alien worlds, intelligent or otherwise.