Andrew James Watson FRS (born 1952) is a British marine and atmospheric scientist and an expert in processes affecting atmospheric

carbon dioxide Carbon dioxide (chemical formula ) is a chemical compound made up of molecules that each have one carbon atom covalently double bonded to two oxygen atoms. It is found in the gas state at room temperature. In the air, carbon dioxide is transpar ...

and

oxygen Oxygen is the chemical element with the symbol O and atomic number 8. It is a member of the chalcogen group in the periodic table, a highly reactive nonmetal, and an oxidizing agent that readily forms oxides with most elements as wel ...

concentrations. He was formerly a Professor of

biogeochemistry Biogeochemistry is the scientific discipline that involves the study of the chemical, physical, geological, and biological processes and reactions that govern the composition of the natural environment (including the biosphere, the cryosphere, t ...

in the School of Environmental Sciences at the

University of East Anglia The University of East Anglia (UEA) is a public research university in Norwich, England. Established in 1963 on a campus west of the city centre, the university has four faculties and 26 schools of study. The annual income of the institution f ...

, in 2013 he moved to a position as Professor at the College of Life and Environmental Sciences at the

University of Exeter The University of Exeter is a public university , public research university in Exeter, Devon, England, United Kingdom. Its predecessor institutions, St Luke's College, Exeter School of Science, Exeter School of Art, and the Camborne School of Min ...

Earth sciences

Watson graduated with a first class BSc in physics from

Imperial College London Imperial College London (legally Imperial College of Science, Technology and Medicine) is a public research university in London, United Kingdom. Its history began with Prince Albert, consort of Queen Victoria, who developed his vision for a cu ...

in 1975. He then became a PhD student of

James Lovelock James Ephraim Lovelock (26 July 1919 – 26 July 2022) was an English independent scientist, environmentalist and futurist. He is best known for proposing the Gaia hypothesis, which postulates that the Earth functions as a self-regulating sys ...

, originator of the

Gaia hypothesis The Gaia hypothesis (), also known as the Gaia theory, Gaia paradigm, or the Gaia principle, proposes that living organisms interact with their inorganic surroundings on Earth to form a synergistic and self-regulating, complex system that help ...

of Earth regulation, at the

University of Reading The University of Reading is a public university in Reading, Berkshire, England. It was founded in 1892 as University College, Reading, a University of Oxford extension college. The institution received the power to grant its own degrees in 192 ...

. He and Lovelock introduced the

Daisyworld Daisyworld, a computer simulation, is a hypothetical world orbiting a star whose radiant energy is slowly increasing or decreasing. It is meant to mimic important elements of the Earth-Sun system, and was introduced by James Lovelock and And ...

model in 1983, showing how ecological competition between hypothetical "daisies" could affect planetary

albedo Albedo (; ) is the measure of the diffuse reflection of sunlight, solar radiation out of the total solar radiation and measured on a scale from 0, corresponding to a black body that absorbs all incident radiation, to 1, corresponding to a body ...

and regulate environmental temperature. Watson and his students have subsequently developed ''a priori'' models for the regulation of atmospheric composition through geological time. He has applied the weak

Anthropic Principle The anthropic principle, also known as the "observation selection effect", is the hypothesis, first proposed in 1957 by Robert Dicke, that there is a restrictive lower bound on how statistically probable our observations of the universe are, beca ...

to evolution on Earth, suggesting that long-term regulation of the Earth’s temperature and environment may be a necessary pre-requisite to allow sufficient time for the evolution of complex life and intelligence, rather than an intrinsic property of the biosphere as Lovelock proposed.

Tracing ocean waters

While at the

Marine Biological Association The Marine Biological Association of the United Kingdom (MBA) is a learned society with a scientific laboratory that undertakes research in marine biology. The organisation was founded in 1884 and has been based in Plymouth since the Citadel H ...

and

Plymouth Marine Laboratory Plymouth Marine Laboratory (abbreviated as PML) in the city of Plymouth, England, is a marine research organization and registered charity. It is a partner of the UK Research & Innovation's Natural Environment Research Council (NERC). PML's chai ...

in the 1980s, he developed techniques for tracking ocean water bodies using tracers such as

sulphur hexafluoride Sulfur hexafluoride or sulphur hexafluoride (British spelling) is an inorganic compound with the formula SF6. It is a colorless, odorless, non-flammable, and non-toxic gas. has an octahedral geometry, consisting of six fluorine atoms attached t ...

and

perfluorodecalin Perfluorodecalin () is a fluorocarbon, a derivative of decalin in which all of the hydrogen atoms are replaced by fluorine atoms. It is chemically and biologically inert and stable up to 400 °C. Several applications make use of its ability to di ...

. He and colleagues applied these to measure the slow mixing vertical rates in the ocean, and to trace the movement of patches of surface water. He also applied the technology to enable

iron fertilization Iron fertilization is the intentional introduction of iron to iron-poor areas of the ocean surface to stimulate phytoplankton production. This is intended to enhance biological productivity and/or accelerate carbon dioxide () sequestration fr ...

experiments. More than a dozen such experiments have now been carried out and have proved that iron is an essential limiting nutrient in important areas of the world ocean.

Popular science

Watson published the popular book ''Revolutions that Made the Earth'' with colleague Tim Lenton in 2011. In 2015, Watson appeared on Charlie Brooker's Weekly Wipe Series 3, interviewed by the character,

Philomena Cunk Diane Morgan (born 5 October 1975) is an English actress, comedian, television presenter, and writer. She is best known for playing Philomena Cunk on Charlie Brooker's ''Weekly Wipe'' and in other mockumentaries, as Liz in the BBC Two sitcom ' ...

References

{{DEFAULTSORT:Watson, Andy 1952 births Living people Alumni of Imperial College London Alumni of the University of Reading Academics of the University of Exeter Academics of the University of East Anglia Fellows of the Royal Society British earth scientists Atmospheric scientists British oceanographers