John Sidney Adcock Green was a British meteorologist.
He was born in Gainsborough, Lincolnshire and studied mathematics at Imperial College London graduating Bachelor of Science
He was awarded a Doctor of Philosophy in 1961 for his research into baroclinic instability.
In 1955. After receiving his Doctor of Philosophy, he was appointed as Lecturer in the Department of Meteorology and subsequently rose to the position of Reader. In 1986 he moved to the School of Environmental Sciences at the University of East Anglia at Norwich. He taught there until retiring as Reader in 1996.
He was Vice-President of the Royal Meteorological Society in 1981 and a Symons Gold Medal recipient in 2004.