Eloise Marais

Marais is from South Africa.^[1] She studied chemistry and applied chemistry at the University of KwaZulu-Natal for her undergraduate degree,^[1] before moving to Rhodes University for an MSc in physical and analytical chemistry.^{[citation needed]} She was awarded an International Fulbright Science and Technology Award and completed her doctorate at Harvard University.^{[citation needed]} Her doctoral research used satellite observations and chemical transport models to quantify air pollutant precursor emissions of volatile organic compounds across Africa. Marais spent two years at Harvard as a postdoctoral researcher. She joined the University of Birmingham in 2016, where she developed tools for air monitoring in urban environments.^{[citation needed]} and established the Atmospheric Composition and Air Quality research group.

In 2018, Marais joined Leicester as an associate professor.^[2] She spent two years in Leicester before moving to University College London, where she studied the impact of fossil fuel emissions on human health.^[3] Her research has shown that fossil fuel emissions accounted for 18% of deaths around the world in 2018, and that regions with the highest concentrations of fossil fuels in the air had the highest rates of mortality.^[3]

Marais was awarded a European Research Council grant to understand the understudied upper troposphere using multi-modal data.^[1] There are uncertainties in the composition of the upper troposphere, and limited understanding of how it influences climate and air quality. She has studied how space tourism impacts the climate.^[4] She ran a 10-year simulation to understand how rocket emissions compared with traditional sources of carbon dioxide, finding space tourism undermined environmental efforts on planet Earth.^[4] Her research showed that a SpaceX launch emitted one hundred times more carbon dioxide than a traditional transatlantic flight,^[5][6] and that these pollutants could destroy the ozone if injected into the stratospheric ozone layer.^[4][7] She showed that this could persist for two or more years.^[8]

Marais has ongoing projects to measures the atmosphere above Central London, develop inventories and derive new data sets from satellite observations.^[9] She worked as a researcher in residence with the Connected Places Catapult, where she developed tools to better understand the city environment.^[10] She has used Multi-Axis Differential Optical Absorption Spectroscopy to evaluate the presence of nitrogen dioxide and formaldehyde.^[11] Marias was supported by the Department for Environment, Food and Rural Affairs to understand air pollution above Leicester. In 2024 she was promoted to Professor at University College London.^{[citation needed]}

• Karn Vohra; Alina Vodonos; Joel Schwartz; Eloise A. Marais; Melissa P Sulprizio; Loretta J. Mickley (April 2021). "Global mortality from outdoor fine particle pollution generated by fossil fuel combustion: Results from GEOS-Chem". Environmental Research. 195: 110754. doi:10.1016/J.ENVRES.2021.110754. ISSN 0013-9351. Wikidata Q114191726.
• Hannah M. Horowitz; Daniel J. Jacob; Yanxu Zhang; et al. (17 January 2017). "A new mechanism for atmospheric mercury redox chemistry: Implications for the global mercury budget". Atmospheric Chemistry and Physics Discussions: 1–33. doi:10.5194/ACP-2016-1165. ISSN 1680-7375. Wikidata Q63487407.
• Qiaoqiao Wang; Daniel J. Jacob; J. Ryan Spackman; et al. (14 January 2014). "Global budget and radiative forcing of black carbon aerosol: Constraints from pole-to-pole (HIPPO) observations across the Pacific". Journal of Geophysical Research: Atmospheres. 119 (1): 195–206. Bibcode:2014JGRD..119..195W. doi:10.1002/2013JD020824. ISSN 2169-897X. Wikidata Q59164538.