Joy Sargita Singarayer (born 23 September 1976) is a British climate scientist and Professor of Palaeoclimatology at the University of Reading, where she is joint Head of the Department of Meteorology.
She moved to the University of Oxford and completed a PhD in 2002 on "Linearly modulated optically stimulated luminescence of sedimentary quartz: physical mechanisms and implications for dating"[2] with Richard Bailey.
[4][5][6] She has shown how sea ice has regulated Earth's past climate, both through reflection of sunlight and prevention of heat escaping from the warm ocean to the atmosphere.
[7][8] Using climate simulations, Singarayer demonstrated that methane emissions from last glacial cycle may be the result of Earth orbital changes, rather than human activity.
[9][10] Singarayer has also quantified the climate implications of changing land use by agriculture, including assessment of the bio-geoengineering benefits of switching to high reflectivity crops.