Joanna Dorothy Haigh CBE FRS FInstP FRMetS (born 7 May 1954)[5] is a British physicist and academic.

[1][7][8] Before her retirement in 2019[9] she was Professor of Atmospheric Physics at Imperial College London, and co-director of the Grantham Institute – Climate Change and Environment.

[12][13][14][15][16] She has served as editor of the Journal of the Atmospheric Sciences and a lead author on the Third Assessment Report of the Intergovernmental Panel on Climate Change (IPCC).

Haigh conforms to the mainstream scientific view, that anthropogenic carbon emissions lead to increased greenhouse warming.

Her nomination read:[22] Distinguished for her scientific leadership in the area of solar influences on the middle atmosphere and for her modelling of how these effects can modulate tropospheric circulations and so propagate to Earth's surface.

By proposing and demonstrating an entirely novel mechanism for solar influence on climate she has allowed proper allowance to be made for the small and subtle, yet revealing effects.In 2004 she received the Charles Chree Medal and Prize from the Institute of Physics and in 2010 the Royal Meteorological Society Adrian Gill prize for her work on solar variability and its effects on climate.