Two of ambient music's greatest strengths are conjuring up isolated locations and immense timelines. In Time Frost, Robin Storey uses them to imagine a Europe chilled by ocean currents altered by global warming. It is easy to be cynical about climate change as an artistic subject considering its status as Hollywood's pet-cause of the moment. Time Frost does something far more satisfying: it calls to mind vivid images that do not need to be interpreted through an ideology.