Former Group Members

Read about former group members here!

Graduate Students

The table below lists PhD candidates who have graduated from the group.

Name Graduation Date Thesis & Publications
Sébastien Roche 2021

Thesis: Measurements of Greenhouse Gases from Near-Infrared Solar Absorption Spectra

Roche, S., Strong, K., Wunch, D., Mendonca, J., Sweeney, C., Baier, B., Biraud, S. C., Laughner, J. L., Toon, G. C., and Connor, B. J.: Retrieval of atmospheric CO2 vertical profiles from ground-based near-infrared spectra, Atmos. Meas. Tech., 14, 3087–3118,, 2021.

The table below lists Master's students who have completed their Master's degrees.

Name Graduation Date Thesis Title
Lawson Gillespie 2020 Measurements of Greenhouse Gases in the Greater Toronto Area

Postdoctoral Fellows

This table contains a list of former postdocs in the group, the dates they joined and left the group, and the publications that resulted form their postdoctoral work.

Name Dates Publications
Erik Lutsch 2019-2022 Lutsch et al. Can the data assimilation of CO from MOPITT or IASI constrain high-latitude wildfire emissions? A Case Study of the 2017 Canadian Wildfires. Under review.
Sébastien Ars 2018-2019 Sébastien Ars, Felix Vogel, Colin Arrowsmith, Sajjan Heerah, Emily Knuckey, Juliette Lavoie, Christopher Lee, Nasrin Mostafavi Pak, Jaden L. Phillips, and Debra Wunch. Investigation of the Spatial Distribution of Methane Sources in the Greater Toronto Area Using Mobile Gas Monitoring Systems. Environmental Science & Technology 2020 54 (24), 15671-15679 DOI: 10.1021/acs.est.0c05386
Joseph Mendonca 2017-2019 Mendonca, J., Nassar, R., O'Dell, C. W., Kivi, R., Morino, I., Notholt, J., Petri, C., Strong, K., and Wunch, D.: Assessing the feasibility of using a neural network to filter Orbiting Carbon Observatory 2 (OCO-2) retrievals at northern high latitudes, Atmos. Meas. Tech., 14, 7511–7524,, 2021.
Jacob Hedelius 2017-2019

Hedelius, J. K., Toon, G. C., Buchholz, R. R., Iraci, L. T., Podolske, J. R., Roehl, C. M., et al. (2021). Regional and urban column CO trends and anomalies as observed by MOPITT over 16 years. Journal of Geophysical Research: Atmospheres, 126, e2020JD033967.

Hedelius, J. K., He, T.-L., Jones, D. B. A., Baier, B. C., Buchholz, R. R., De Mazière, M., Deutscher, N. M., Dubey, M. K., Feist, D. G., Griffith, D. W. T., Hase, F., Iraci, L. T., Jeseck, P., Kiel, M., Kivi, R., Liu, C., Morino, I., Notholt, J., Oh, Y.-S., Ohyama, H., Pollard, D. F., Rettinger, M., Roche, S., Roehl, C. M., Schneider, M., Shiomi, K., Strong, K., Sussmann, R., Sweeney, C., Té, Y., Uchino, O., Velazco, V. A., Wang, W., Warneke, T., Wennberg, P. O., Worden, H. M., and Wunch, D.: Evaluation of MOPITT Version 7 joint TIR–NIR XCO retrievals with TCCON, Atmos. Meas. Tech., 12, 5547–5572,, 2019.

Hedelius, Jacob; Wunch, Debra, 2019, "Mass conserving quartic-spline and linear interpolation techniques over variable width partitions",, Scholars Portal Dataverse, V1