Clouds are vital to life — but many are becoming wispy ghosts. Here’s how to see the changes above us

As a scholar researching clouds, I have spent much of my time trying to understand the economy of the sky. Not the weather reports showing scudding rainclouds, but the deeper logic of cloud movements, their distributions and densities and the way they intervene in light, regulate temperatures and choreograph heat flows across our restless planet.

Recently, I have been noticing something strange: skies that feel hollowed out, clouds that look like they have lost their conviction. I think of them as ghost clouds. Not quite absent, but not fully there. These wispy formations drift unmoored from the systems that once gave them coherence. Too thin to reflect sunlight, too fragmented to produce rain, too sluggish to stir up wind, they give the illusion of a cloud without its function.

We think of clouds as insubstantial. But they matter far beyond their weight or tangibility. In dry Western Australia where I live, rain-bringing clouds are eagerly anticipated. But the winter storms which bring most rain to the south-west are being pushed south, depositing vital fresh water into the oceans. More and more days pass under a hard, endless blue — beautiful, but also brutal in its vacancy.

Worldwide, cloud patterns are now changing in concerning ways. Scientists have found the expanse of Earth’s highly reflective clouds is steadily shrinking. With less heat reflected, the Earth is now trapping more heat than expected.