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Dr Thomas Keith Bauska

Dr Thomas Keith Bauska

Research Associate

Climate Change and Earth-Ocean-Atmosphere Systems

Downing Site - Room No. M5
Downing Street

Office Phone: +44 (0) 1223 364917


Postdoctoral Scholar, Oregon State University, 2014-2015

Ph.D., Geology, Oregon State University, 2013

B.S., Geophysical Sciences, The University of Chicago, 2007 

Google Scholar Page

Research Interests

The overarching goal of my research is to use the climate and carbon cycle variability of the past to inform projections of the future. I reconstruct past changes in the carbon cycle by measuring the concentration and isotopic composition of greenhouse gases trapped in polar ice cores.  More recently, I have been working on developing new methods for measuring the δ18O, δ17O and δD of water in hydrated minerals and fluid inclusions to understand past changes in the hydrological cycle.    

 Ice Core Bubbles Bauska


Stable isotopes ; palaeoclimate reconstructions

Key Publications

Baggenstos, D., Bauska, T.K.,  Severinghaus, J.P., Lee, J.E., Schaefer, H., Buizert, C., Brook, E.J., Shackleton, S., and Petrenko, V.V. (2017). Atmospheric gas records from Taylor Glacier, Antarctica, reveal ancient ice with ages spanning the entire last glacial cycle. Clim. Past Discuss., doi:10.5194/cp-2017-25,

Bauska, T.K., Baggenstos, D., Brook, E.J., Mix, A.C., Marcott, S.A., Petrenko, V.V., Schaefer, H., Severinghaus, J.P., and Lee, J.E. (2016). Carbon isotopes characterize rapid changes in atmospheric carbon dioxide during the last deglaciation. Proc. Natl. Acad. Sci. doi: 10.1073/pnas.1513868113

Petrenko, V.V., Severinghaus, J.P., Schaefer, H., Smith, A.M., Kuhl, T., Baggenstos, D., Hua, Q., Brook, E.J., Rose, P., Kulin, R., Bauska, T.K., et al. (2016). Measurements of 14C in ancient ice from Taylor Glacier, Antarctica constrain in situ cosmogenic 14CH4 and 14CO production rates. Geochim. Cosmochim. Acta.

WAIS Divide Project Members (lead author: Christo Buizert) (2015). Precise interpolar phasing of abrupt climate change during the last ice age. Nature 520, 661–665.

Bauska, T.K., Joos, F., Mix, A.C., Roth, R., Ahn, J., and Brook, E.J. (2015). Links between atmospheric carbon dioxide, the land carbon reservoir and climate over the past millennium. Nat. Geosci 8, 383–387.

Schilt, A., Brook, E.J., Bauska, T.K., Baggenstos, D., Fischer, H., Joos, F., Petrenko, V.V., Schaefer, H., Schmitt, J., Severinghaus, J.P., et al. (2014). Isotopic constraints on marine and terrestrial N2O emissions during the last deglaciation. Nature 516, 234–237.

Marcott, S.A., Bauska, T.K., Buizert, C., Steig, E.J., Rosen, J.L., Cuffey, K.M., Fudge, T., Severinghaus, J.P., Ahn, J., Kalk, M.L., et al. (2014). Centennial-scale changes in the global carbon cycle during the last deglaciation. Nature 514, 616–619

Bauska, T.K., Brook, E., Mix, A., and Ross, A. (2014). High-precision dual-inlet IRMS measurements of the stable isotopes of CO2 and the N2O / CO2 ratio from polar ice core samples. Atmospheric Meas. Tech. 7, 3825–3837.



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