Theodore Gordon Shepherd FRS[5] (born 6 August 1958)[3] is the Grantham Professor of Climate Science at the University of Reading.

[3] He completed his postgraduate education at Massachusetts Institute of Technology (MIT) where he was awarded a PhD in 1982[9] for research supervised by Jule Gregory Charney and Peter B. Rhines on turbulence in Rossby waves.

[3][11] After 24 years working at the University of Toronto in Canada he moved back to the United Kingdom in 2012,[12] funded by a Royal Society Wolfson Research Merit Award.

[5][13][14] Shepherd worked at the University of Toronto from 1988-2012,[15] where he made pioneering contributions to Hamiltonian fluid mechanics[16] while initiating and leading the Canadian national climate modelling effort focussed on ozone-climate coupling.

Since moving to the University of Reading in 2012,[12] he has highlighted the important role of atmospheric circulation in climate change, which has implications for regional adaptation and societal risk.