It’s Time To Talk About Solar Geoengineering

Holly Jean Buck | an excerpt adapted from After Geoengineering: Climate Tragedy, Repair, and Restoration | Verso | 2019 | 24 minutes (6,467 words)
December in California at one degree of warming: ash motes float lazily through the afternoon light as distant wildfires rage. This smoky “winter” follows a brutal autumn at one degree of warming: a wayward hurricane roared toward Ireland, while Puerto Rico’s grid, lashed by winds, remains dark. This winter, the stratospheric winds break down. The polar jet splits and warps, shoving cold air into the middle of the United States. Then, summer again: drought grips Europe, forests in Sweden are burning, the Rhine is drying up. And so on.
One degree of warming has already revealed itself to be about more than just elevated temperatures. Wild variability is the new normal. Atmospheric patterns get stuck in place, creating multiweek spells of weather that are out of place. Megafires and extreme events are also the new normal — or the new abnormal, as Jerry Brown, California’s former governor, put it. One degree is more than one unit of measurement. One degree is about the uncanny, and the unfamiliar.
If this is one degree, what will three degrees be like? Four?
At some point — maybe it will be two, or three, or four degrees of warming — people will lose hope in the capacity of current emissions-reduction measures to avert climate upheaval. On one hand, there is a personal threshold at which one loses hope: many of the climate scientists I know are there already. But there ’s also a societal threshold: a turning point, after which the collective discourse of ambition will slip into something else. A shift of narrative. Voices that say, “Let’s be realistic; we’re not going to make it.” Whatever making it means: perhaps limiting warming to 2°C, or 1.5, as the Paris Agreement urged the world to strive for. There will be a moment where “we,” in some kind of implied community, decide that something else must be tried. Where “we” say: Okay, it’s too late. We didn’t try our best, and now we are in that bad future. Then, there will be grappling for something that can be done. Read more…
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