Display Name: 
Mark Claire
Title 1: 
Lecturer in Earth Systems Biogeochemistry
Department 1: 
School of Environmental Sciences


I work on improving models of terrestrial planets, with the aim of reducing uncertainties in our ability to interpret spectra of extrasolar planets. I work with the VPL photochemical and climate models, and am broadly interested in questions of atmospheric evolution and planetary habitability.
Selected publications:
Claire, M.W. , Sheets, J., Cohen, M., Ribas, I., and Catling, D.C., “The evolution of solar flux from 2 nm to 160 microns: quantitative estimates for planetary studies” Astrophysical Journal, in press, 2012.
Zerkle A., Claire M., Domagal-Goldman S., Farquhar J., and Poulton S. “A bistable organic-rich atmosphere on the Neoarchaean Earth, Nature Geosciences, 2012. DOI: 10.1038/NGEO1425.
Domagal-Goldman, S.D., Meadows, V.C, Claire, M.C., Kasting, J.F. “Astronomical biosignatures for sulfur-rich anoxic biospheres.” Astrobiology, 11(5), 2011.
Beal, E., Claire, M, and House, C.. “High rates of anaerobic methanotrophy at low sulfate concentration with implications for past and present methane levels” Geobiology, DOI: 10.1111/j.1472-4669.2010.00267.x, 2011.
Tian, F., Claire, M., Haqq-Misra, J., Smith, M.,Crisp, D., Catling, D., Zahnle, K., Kasting, J. . “Photochemical and climate consequences of sulfur outgassing on early Mars.” Earth and Planetary Sciences Letters, 295 (3-4), 412-418, 2010.
Catling, D.C., Claire, M. W., Zahnle, K. J., Quinn, R. C., Clark, B. C., Hecht, M. H., Kounaves, S. “Atmospheric origins of perchlorate on Mars and in the Atacama”, J. Geophys. Res., 115,E00E11, 1-15, 2010
Marion, G.M., Catling, D.C., Zahnle, K.J., and Claire, M.W. “Modeling aqueous perchlorate chemistries with applications to Mars”, Icarus, 207 (2) 675-685, 2010.
Goldblatt C., Claire, M. , Lenton, T. , Matthews, A., Watson, A., Zahnle, K. “Nitrogen-enhanced greenhouse warming on the early Earth” Nature Geosciences, 2 (12), 891-896, 2009.
Catling, D.C., Claire, M.W., and Zahnle, K.J., “Anaerobic methanotrophy and the rise of atmospheric oxygen” Philosophical Transactions of the Royal Society of London - A, 365, 1867-1888, 2007.
Mix, L. J. et al., “The Astrobiology Primer: An Outline of General Knowledge - Version 1, 2006”, Astrobiology, 6 (5),735-813, 2006.
Claire, M.W., Catling, D.C., and Zahnle, K.J., “Biogeochemical modeling of the rise in atmospheric oxygen” Geobiology, 4, 239-269, 2006.

Zahnle, K.J., Claire, M.W., and Catling, D.C. “The loss of mass-independent fractionation in sulfur due to a Paleoproterozoic collapse of atmospheric methane” Geobiology, 4, 271-283, 2006.
Catling, D.C and Claire, M.W., “How Earth’s atmosphere evolved to an oxic state - A status report” , Earth and Planetary Sciences Letters - Frontiers, 237, 1-20, 2005.
Home Institution: 
University of East Anglia
First Name: 
Last Name: 
VPL Research Tasks: 
Task B: Earth through Time
Task C: The Habitable Planet
Research Expertise: 
photochemistry, early earth