The twitter message from his colleague Pep Canadell with his portrait, saying: "I have no words to express my deep sadness for the loss of Will Steffen who passed away last night. He had been one of the most influential individuals in global change science programs, director of GCTE, IGBP, and driver of ESSP that led to the creation of the @gcarbonproject"
https://media.mstdn.social/media_attachments/files/109/777/411/243/736/153/original/8342425d212846ca.png