Composer Andrew Lewis and scientist Iestyn Woolway discuss how lakes can help us understand climate change, and how this data can be used to make music. Lakes and reservoirs are a critical natural resource, supporting biodiversity and providing many benefits to people around the world. But lakes are critically susceptible to climate change, especially the increase in global temperatures. Climatic warming can have a huge influence on the physical environment of lakes, including warming of surface water and effects on water levels Ultimately, the physical environment of lakes is responding dramatically to a warming world. In this talk, Iestyn Woolway will discuss the response of key lake variables to climate change, and Andrew Lewis will explain how this data has been used in composing his new piece ‘Two Lakes’.