Geddes group members in bold.


Rindy JE, Pierce EA (co-first author), Geddes JA, Gewirtzman J, Hutyra L, Templer PH, Effects of urbanization and forest fragmentation on atmospheric nitrogen inputs and ambient nitrogen oxide and ozone concentrations in mixed temperate forests. Journal of Geophysical Research Biogeosciences,

Souri AH, Kumar R, Chong H, Golbazi M, Knowland KE, Geddes JA, Johnson MS, Decoupling in the vertical shape of HCHO during a sea breeze event: The effect on trace gas satellite retrievals and column-to-surface translation. Atmospheric Environment,

Adams TJ, Geddes JA, Spinei ES, New insights into the role of atmospheric transport and mixing on column and surface concentrations of NO2 at a coastal urban site, Journal of Geophysical Research-Atmospheres,

Wang B, Geddes JA, Adams TJ, Lind ES, McDonald BC, He J, Harkins C, Li D, Pfister GG, Implications of Sea Breezes on Air Quality Monitoring in a Coastal Urban Environment: Evidence from High Resolution Modeling of NO2 and O3, Journal of Geophysical Research-Atmospheres,

Johnson MS, Souri AH, Philip S, Kumar R, Naeger A, Geddes JA, Judd L, Janz S, Chong H, Sullivan J, Satellite remote-sensing capability to assess tropospheric-column ratios of formaldehyde and nitrogen dioxide: case study during the Long Island Sound Tropospheric Ozone Study 2018 (LISTOS 2018) field campaign, Atmospheric Measurement Techniques,

Borduas-Dedekind N, Naidoo M, Zhu B, Geddes JA, Garland RM. Tropospherico zone pollution in Johannesburg, South Africa: Exceedances, diurnal cycles,s easonality, Ox chemistry and O3 production rates, Clean Air Journal (in press).


Geddes JA, Pusede SE, Wong AYH, Changes in the relative importance of biogenic isoprene and soil NOx emissions on ozone concentrations in nonattainment areas of the US, Journal of Geophysical Research-Atmospheres,

Wong AYH, Geddes JA, Ducker J, Holmes C, Fares S, Goldstein A, Mammarella I, and Munger J, New evidence for the importance of non-stomatal pathways in ozone deposition during extreme heat and dry anomalies, Geophysical Research Letters,

Fu J, Carmichael G, Dentener F, Aas W, Andersson C, Barrie L, Cole A, Galy-Lacaux C, Geddes JA, Itahashi S, Kanakidou M, Labrador L, Paulot F, Schwede D, Tan J, and Vet R, Improving Estimates of Sulfur, Nitrogen, and Ozone Total Deposition through Multi-Model and Measurement-Model Fusion Approaches, Environmental Science & Technology,


Wong AYH and Geddes JA, Examining the competing effects of contemporary land management vs. land cover changes on global air quality, Atmospheric Chemistry and Physics,

Geddes JAWang B, and Li D, Ozone and nitrogen dioxide pollution in a coastal urban environment: the role of sea breezes, and implications of their representation for remote sensing of local air quality, Journal of Geophysical Research-Atmospheres, doi:10.1029/2021JD035314.

Radford ACGeddes JA, Gallagher K, and Larson BA, Open-source methods for estimating health risks of fine particulate matter from coal-fired power plants: A demonstration from Karachi, Pakistan, Environmental Impact Assessment Review, doi:10.1016/j.eiar.2021.106638.


Demetillo MAG, Navarro A, Knowles KK, Fields KP, Geddes JA, Nowlan CR, Janz SJ, Judd LM, Al-Saadi J, Sun K, McDonald BC, Diskin GS, and Pusede SE (2020), Observing nitrogen dioxide air pollution inequality using high-spatial-resolution remote sensing measurements in Houston, Texas, Environmental Science & Technology, doi: 10.1021/acs.est.0c01864

Lapierre JL, Laughner JL, Geddes JA, Koshak W, Cohen RC, and Pusede SE (2020), Observing U.S. regional variability in lightning NO2 production rates, Journal of Geophysical Research: Atmospheresdoi: 10.1029/2019JD031362


Chance K, Liu X, Chan Miller C, González Abad G, Huang G, Nowlan C, Souri A, Suleiman R, Sun K, Wang H, Zhu L, Zoogman P, Al-Saadi J,  Antuña-Marrero J-C, Carr J, Chatfield R, Chin M, Cohen R, Edwards D, Fishman J, Flittner D, Geddes JA, Grutter M, Herman J, Jacob DJ, Janz S, Joiner J, Kim J, Krotkov NA, Lefer R, Martin RV, Mayol-Bracero OL, Naeger A, Newchurch M, Pfister G, Pickering K, Pierce R, Rivera Cárdenas C, Saiz-Lopez A, Simpson W, Spinei E, Spurr RJD, Szykman JJ, Torres O, Wang J (2019), TEMPO Green Paper: Chemistry, physics, and meteorology experiments with the Tropospheric Emissions: monitoring of pollution instrument, Proc. SPIE 11151, Sensors, Systems, and Next-Generation Satellites XXIII, 111510B,

Wong AYH, Geddes JA, Tai A, and Silva S (2019), Importance of dry deposition parameterization choice in global simulations of surface ozone, Atmospheric Chemistry and Physics,

Demetillo AG , Anderson JF, Geddes JA, Yang X, Najacht EY, Herrera SA, Kabasares KM, Kotsakis AE, Lerdau MT, and Pusede SE (2019), Observing Severe Drought Influences on Ozone Air Pollution in California. Environmental Science & Technology, doi:10.1021/acs.est.8b04852.


Geddes JA, Martin RV, Bucsela EJ, McLinden CA, and Cunningham DJM (2018), Stratosphere-troposphere separation of nitrogen dioxide columns from the TEMPO geostationary satellite instrument. Atmospheric Measurement Techniques,

Zhou SS, Tai APK, Sun S, Sadiq M, Heald CL, and Geddes JA (2018), Coupling between surface ozone and leaf area index in a chemical transport model: Strength of feedback and implications for ozone air quality and vegetation health. Atmospheric Chemistry and Physics, doi: 10.5194/acp-18-14133-2018.

Petroff A, Murphy JG, Thomas SC, and Geddes JA, Size-resolved aerosol fluxes above a temperate broadleaf forest. Atmospheric Environment, 190, 359-375, doi: 10.1016/j.atmosenv.2018.07.012.


Geddes JA and Martin RV (2017), Global deposition of total reactive nitrogen oxides from 1996 to 2014 constrained with satellite observations of NO2 columns. Atmospheric Chemistry and Physics, doi:10.5194/acp-17-10071-2017.

Larkin A, Geddes JA, Martin RV, Xiao Q, Liu Y, Marshall JD, Brauer M, and Hystad P (2017), A global land use regression model for nitrogen dioxide air pollution. Environmental Science & Technology, DOI: 10.1021/acs.est.7b01148.

Zheng T, Chen J, He L, Arain MA, Thomas SC, Murphy JG, Geddes JA, Black TA (2017), Inverting the maximum carboxylation rate (Vcmax) from the sunlit leaf photosynthesis rate derived from measured light response curves at tower flux sites. Agricultural and Forest Meteorology, 236: 48-66.


Heald CL and Geddes JA (2016), The Impact of Historical Land Use Change From 1850 to 2000 on Particulate Matter and Ozone. Atmospheric Chemistry and Physics, doi:10.5194/acp-16-14997-2016.

Larkin A, van Donkelaar A, Geddes JA, Martin RV, Hystad P (2016), Relationships between changes in urban characteristics and air quality in East Asia from 2000 to 2010. Environmental Science & Technology. doi:10.1021/acs.est.6b02549.

Silva SJ, Heald CL, Geddes JA, Austin KG, Kasibhatla PS, and Marlier ME (2016), Impacts of current and projected oil palm plantation expansion on air quality over Southeast Asia. Atmospheric Chemistry and Physicsdoi:10.5194/acp-16-10621-2016.

Geddes JA, Heald CL, Silva, SJ, and Martin RV (2016), Land cover change impacts on atmospheric chemistry: simulating large-scale tree mortality in the United States. Atmospheric Chemistry and Physics. 16, 2323-2340, doi:10.5194/acp-16-2323-2016.

Geddes JA, Martin RV, Boys BL, and van Donkelaar A (2016), Long term trends worldwide in ambient NO2 concentrations inferred from satellite observations. Environmental Health Perspectives. DOI:10.1289/ehp.1409567.

2015 and earlier:

Geddes JA, Murphy JG, Schurman J, Petroff A, and Thomas SC (2014), Net ecosystem exchange of an uneven-aged managed forest in central Ontario, and the impacts of a spring heat wave event. Agricultural and Forest Meteorology. 198-199: 105-115.

Pugliese SC, Murphy JG, Geddes JA, and Wang JM (2014), The impacts of precursor reduction and meteorology on ground-level ozone in the Greater Toronto Area. Atmospheric Chemistry and Physics. 14: 8197-8207.

Geddes JA and Murphy JG (2014), Observations of reactive nitrogen oxide fluxes by eddy covariance above two mid-latitude North American mixed hardwood forests. Atmospheric Chemistry and Physics. 14: 2939-2957.

Wang JM, Murphy JG, Geddes JA, Winsborough CL, Basiliko N, and Thomas SC (2013), Methane fluxes measured by eddy covariance and static chamber techniques at a temperate forest in central Ontario, Canada. Biogeosciences. 10: 4371-4382.

Geddes JA, and Murphy JG, (2012), The Science of Smog: Chemical concepts in ground level ozone and particular matter. Chapter 10 in The Handbook of Metropolitan Sustainability (Ed. Frank Zeman). Woodhead Publishing Ltd. Phildelphia PA.

Geddes JA, Murphy JG, Celarier EA, and O’Brien J (2012), Biases in long-term NO2 averages inferred from satellite observations due to cloud selection criteria. Remote Sensing of Environment. 124: 210-216.

Geddes JA, Murphy JG, and Wang DW (2009), Long term changes in nitrogen oxides and volatile organic compounds in Toronto and the challenges facing local ozone control. Atmospheric Environment. 43: 3407-3414.

Geddes JA and Moore GWK (2007), A climatology of sea ice embayments in the Cosmonaut Sea, Antarctica. Geophysical Research Letters. 34: DOI:10.1029/2006GRL027910.