Ice at minus 10 degrees Celsius releases more iron from common minerals than liquid water at 4 degrees Celsius, according to a team of researchers from Umeå University, the Institut des Sciences Chimiques de Rennes and CNRS. This discovery could help explain why many Arctic rivers are now turning rusty orange as permafrost thaws in a warming climate. Schematic representation of iron mineral dissolution reactions in ice. Image credit: Sebaaly et al.,...