Ilann Bourgeois

Research Scientist I

Tropospheric Chemistry

NOAA Chemical Sciences Laboratory
325 Broadway, R/CSL7
Boulder, CO 80305 USA




My current research focuses on the sources, transport, reactivity and air quality impact of nitrogen species (e.g., NOx, HNO3, PAN, HONO) and ozone (O3). Nitrogen oxides (NOx) are principally emitted by combustion sources, both natural (wildfires) and anthropogenic (fuel combustion) and are primarily responsible together with volatile organic compounds (VOCs) for the formation of O3. O3 is a secondary air pollutant of particular concern for air quality in most major urban centres on Earth, and also for climate owing to its significant contribution to the global radiative balance.

To study the above-mentioned compounds, I deploy a 4-channels chemiluminescence instrument on board the NASA DC-8 Airborne Science Laboratory, an instrumented aircraft dedicated to airborne measurements. I am currently involved in two projects:

- the Atmospheric Tomography (ATom) project, a global-scale mission that aims to investigate the composition and reactivity of the remote atmosphere to study the chemistry and transport of natural and anthropogenic pollution.

- the FIREX-AQ project, a national mission that aims to study the gas and aerosol emissions of wild and agricultural fires in the US, and the chemistry occurring in the smoke plumes, to understand the climatic and air-quality impacts.


PhD, Ecology, Univ. Grenoble Alpes
MSc, Chemical Engineering, ENSCM Montpellier


Measurements and quantification of nitrogen oxides, total reactive nitrogen, and ozone.

Cooperative Institute for Research in Environmental Sciences National Oceanic and Atmospheric Administration

last modified: February 01, 2021