Dr. James Hansen, Climatologist

Dr. James Hansen heads the NASA Institute for Space Studies in New York City, which is a division of Goddard Space Flight Center's (Greenbelt, MD), Earth Sciences Directorate. He was trained in physics and astronomy in the space science program of Dr. James Van Allen at the University of Iowa. His early research on the properties of clouds of Venus led to their identification as sulfuric acid. Since the late 1970s, he has worked on studies and computer simulations of the Earth's climate, for the purpose of understanding the human impact on global climate. Dr. Hansen is best known for his testimony on climate change to congressional committees in the 1980s that helped raise broad awareness of the global warming issue. Dr. Hansen was elected to the National Academy of Sciences in 1995 and he received the prestigious Heinz Environment Award for his research on global warming in 2001.