Alexander Norman Halliday

Alexander Norman Halliday is a Professor at Columbia University, Department of Earth and Environmental Sciences, and Founding Dean Emeritus of the Columbia Climate School. He is a leading isotope geochemist known for pioneering mass spectrometry techniques in Earth and planetary sciences. His career spans roles at ETH Zürich, the University of Oxford, and the University of Michigan.

• Education: Geology and Physics doctorate from the University of Newcastle-upon-Tyne.

His research focuses on environmental geochemistry, high-temperature geochemistry, and planetary sciences, particularly the development of multiple-collector inductively-coupled plasma mass spectrometry to study planetary accretion and Earth's evolution. He has contributed to mantle geochemistry, volcanism, and pollution studies.

Scientific Awards:

• Honorary Degree (D.Sc.) from the University of St. Andrews (2023).
• Knight Bachelor (2019) for services to science and innovation.
• Harry H. Hess Medal (2016) and Bowen Award (1998) from the American Geophysical Union.
• Murchison Medal (2006) and Urey Medal (2012) from the Geological Society and European Association of Geochemistry.
• Fellow of the Royal Society (2000) and Foreign Associate of the U.S. National Academy of Sciences (2015).