Skip to main content

Cookies and Privacy

We use cookies to improve your experience on our website. To find out more, read our updated Cookie policy, Privacy policy and Terms & Conditions

solar panels Bloomberg/Getty Images

Toward a More Reflective Planet

In early May, the US Senate called on the Department of Energy to investigate the potential of albedo modification – a kind of geoengineering focused on cooling the planet by increasing the reflectivity of the earth’s atmosphere – to fight climate change. This is an important step, and it comes not a moment too soon.

CAMBRIDGE – The last time the atmosphere held as much carbon dioxide as it does today was about three million years ago – a time when sea levels were 10-30 meters higher than they are now. Climate models have long struggled to duplicate those large fluctuations in sea levels – until now. Indeed, for the first time, a high-quality model of Antarctic ice and climate has been able to simulate these large swings. That is smart science, but it brings devastating news.

The new model shows that melting in Antarctica alone could increase global sea levels by as much as one meter (3.2 feet) by the end of this century – well above prior estimates. Worse, it suggests that even extraordinary success at cutting emissions would not save the West Antarctic Ice Sheet, locking in eventual sea-level increases of more than five meters. As little as one meter could put at risk entire cities, from Miami to Mumbai, and cause enormous economic disruption.

We need to turn down the heat – and fast. To this end, albedo modification – a kind of geoengineering intended to cool the planet by increasing the reflectivity of the earth’s atmosphere – holds tremendous promise.

We hope you're enjoying Project Syndicate.

To continue reading, subscribe now.

Subscribe

Get unlimited access to PS premium content, including in-depth commentaries, book reviews, exclusive interviews, On Point, the Big Picture, the PS Archive, and our annual year-ahead magazine.

https://prosyn.org/DK2QPOH;
  1. pei56_Miguel CandelaSOPA ImagesLightRocket via Getty Images_xijinpinghongkongprotestmasks Miguel Candela/SOPA Images/LightRocket via Getty Images

    China’s Risky Endgame in Hong Kong

    Minxin Pei

    In 2017, Chinese President Xi Jinping declared that by the time the People’s Republic celebrates its centenary in 2049, it should be a “great modern socialist country” with an advanced economy. But following through with planned measures to tighten mainland China's grip on Hong Kong would make achieving that goal all but impossible.

    2