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Concept
Guy Stewart Callendar
Summary
Guy Stewart Callendar (ˈkæləndər; 9 February 1898 – 3 October 1964) was an English steam engineer and inventor. His main contribution to human knowledge was developing the theory that linked rising carbon dioxide concentrations in the atmosphere to global temperature. In 1938, he was the first to show that the land temperature of Earth had risen over the previous 50 years. This theory, earlier proposed by Svante Arrhenius, has been called the Callendar effect. Callendar thought this warming would be beneficial, delaying a "return of the deadly glaciers."
Callendar was born in Montreal in 1898, where his father, Hugh Longbourne Callendar, was Professor of Physics at McGill College (now McGill University). An expert in thermodynamics, Hugh Callendar returned to the United Kingdom with his family upon being appointed Quain Professor of Physics at University College London, before moving on after four years to take up a personal chair at Imperial College London. His children grew up in an intellectually fertile environment, with visits at home from various members of the scientific elite. When Guy was five he was left partially blinded after his elder brother Leslie stuck a pin in his left eye. In 1913 he enrolled at St Paul's School, but left two years later following the start of World War I. Unfit for war service because of his blindness, he instead went to work in his father's laboratory at Imperial College as an assistant to the X-ray Committee of the Air Ministry, where he was involved in testing a variety of apparatus, including aircraft engines at the Royal Aircraft Factory (later Establishment) in Farnborough. In 1919 he began a course in Mechanics and Mathematics at City and Guilds College (part of Imperial), graduating with a certificate in those subjects three years later. This allowed him to commence full-time employment with his father, working on the properties of steam at high temperatures and pressures.
Callendar's professional work on steam and pressure was conducted under the patronage of the British Electrical and Allied Industries Research Association, which represented turbine manufacturers.
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