Like ice in a drink, Arctic sea ice keeps things cold – until it melts. Using the same principle, some scientists are investigating whether they can make sea ice thicker and better able to cool the planet. I recently returned from Cambridge Bay in the far north of Canada, where I saw some early experiments in practice.
Over the winter months, the build-up of sea ice around Cambridge Bay and across the Arctic helps keep the sea water underneath close to the freezing temperature, which for saltwater is around -1.8°C.
