Research Group

Current Group members 


Dr Russel Deitrick: Climate modelling for past Earth and exoplanets.

Dr Jake Eager-Nash: Millennial timescale climate change (co-supervosor: Prof Andrew Weaver)

Dr Julia Horne: Biogeochemical evolution of Earth

Grad Students

Camille Febvre (PhD): Co-evolution of life and environment (co-supervisor, Prof Rana El Saabawi, UVIc Bio)

Daniel Garduno Ruiz (PhD): Evolution of atmospheric oxygen.

Jade Skye (MSc): A global peatland budget (co-supervisor, Dr Joe Melton, ECCC)

Undergradute Students

Joel Nordine (SURA/Honours): Climate under different nitrogen inventories in a GCM


Dr Julia Horne (PhD 2024)

Thesis:Publications:Now: Postdoc in the group

Karen Garcia Perdomo (BSc Phys/Atm-Ocean, Directed studies, 2024)

Brandon Smith (MSc, 2022)

Thesis:Now: Weather Forecaster, NOAA

Keighan Gemmell (USRA, BSc Honours Earth Sci 2022)

Dr Carsten Abraham (Postdoc 2019-2021)

Publications:Now: Reserach Scientist, Canadian Centre for Climate Modelling and Analysis

Victoria MacDonald (USRA, Directed Studies, BSc Honours Earth Sci, 2019)

Thesis:Awards: USRA x 2, Jamie Casels Undergraduate Research AwardPublications:Went on to: Graduate Program, Univesity of Washington.
Now: Data Scientist, NASA JPL

Kennedy Rolson (UG Summer project, 2019)

Maura Dewey (USRA, BSc Phys/Atm-Ocean Honours 2015, then Research Associate 2016-2020)

Thesis: Quantification of the Runaway Greenhouse Limit on Earth Awards: Jamie Casels Undergraduate Research Award, Barnes Prize for the best honours thesisPublications:Went on to: Graduate Program, Stockholm University

Forest Pimm (BSc Honours Earth Sci, 2018)

Thesis:Awards: Jamie Casels Undergraduate Research AwardPublications:

Cedar Hanneson (BSc Phys/Geophysics Honours, 2017)

Thesis: Awards: Jamie Casels Undergraduate Research Award

Dr Ben Johnson (PhD 2017)

  1.  B.W. Johnson*, S.W. Poulton and C. Goldblatt, Marine oxygen production and open water supported an active nitrogen cycle during the Marinoan Snowball Earth, Nature Communications, 8, 1316, 2017 doi:10.1038/s41467-017-01453-z.
  2. B.W. Johnson*, N. Drage*, J. Spence, N. Hanson, R. El-Sabaawi, C. Goldblatt, Measurement of geologic nitrogen using mass spectrometry, colorimetry, and a newly adapted fluorometry technique, Solid Earth, 8, 307–318, 2017,
  3. Stüeken, E., Kipp, M., Koehler, M., Schwieterman, E., Johnson, Benjamin W, and Buick, R. Modeling pN2 through geologic time: Implications for atmospheric biosignatures. Astrobiology, 16(12), 949-963, 2016.
  4. Hoffman, Paul F.; Bellefroid, Eric; Crockford, Peter, de Moor, Alex; Halverson, Galen; Hodgin, Blake; Hodgskiss, Malcolm; Holtzman, Ben; Jasechko, G.; Johnson, Ben and Lamothe, Kelsey.  A misfit Cryogenian diamictite in the Vrede domes, Northern Damara Zone, Namibia:Chuos (Sturtian) or Ghaub (Marinoan) Formation? Moraine or Palaeovalley? Communications - Geological Survey of Namibia, 17, 1-16, 2016.
  5. Hoffman, Paul F.; Bellegroid, Eric J.; Johnson, Benjamin W.; Hodgskiss, Malcolm S.W.; Schrag, Daniel P. and Halverson, Galen P.  Early extensional detachments in a contractional orogen: coherent, map-scale, submarine slides (mass transport complexes) on the outer slope of an Ediacaran collisional foredeep, eastern Kaoko belt, Namibia. Canadian Journal of Earth Sciences. 53, 1-13, 2016.
  6. B. Johnson* and C. Goldblatt, The nitrogen budget of Earth, Earth Sci. Rev., 148, 150-173, doi:10.1016/j.earscirev.2015.05.006, 2015.
Went on to: NSF Postdoctoral Fellowship, University of ColoradoNow: Assistant Professor, Iowa State

Natasha Drage (USRA)

  1. B.W. Johnson*, N. Drage*, J. Spence, N. Hanson, R. El-Sabaawi, C. Goldblatt, Measurement of geologic nitrogen using mass spectrometry, colorimetry, and a newly adapted fluorometry technique, Solid Earth, 8, 307–318, 2017,

Brendan Byrne (MSc 2014)

  1. B. Byrne* and C. Goldblatt, Diminished greenhouse warming from Archean methane due to solar absorption lines, Clim. Past.,  11, 559-570, doi:10.5194/cp-11-559-2015, 2015. 
  2. B. Byrne* and C. Goldblatt, Radiative forcings for 28 potential Archean greenhouse gases, Clim. Past, 10, 1779-1801, doi:10.5194/cp-10-1779-2014,2014. 
  3. B. Bryne* and C. Goldblatt, Radiative forcing at high concentrations of well mixed greenhouse gases, Geophys. Res. Lett., 2014, doi:10.1002/2013GL058456
Now: Postdoc, JPL

Lucas Kavenagh (USRA, BSc Honours 201X, occasional Research Assistant)

Thesis:Awards: Jamie Casels Undergraduate Research AwardPublications:
  1. L. Kavenagh* and C. Goldblatt, Using raindrops to constrain past atmospheric density, Earth Plan. Sci. Lett., 413, 51-58, doi:10.1016/j.epsl.2014.12.032, 2015.
  2. C. Goldblatt, M. Dewey* and L. Kavenagh*, The Palaeoclimate and Terrestrial Exoplanet Radiative Transfer Model Intercomparison Project (PALAEOTRIP): experimental design and protocols, Geosci. Model Dev. Discuss., 2017,
Now: Founder, Avo Media Science Communication