skip to content

Department of Earth Sciences

Climate Change and Earth-Ocean-Atmosphere Systems


  • Royal Society University Research Fellow, British Antarctic Survey, Cambridge, UK (2019-present)
  • Postdoc, Department of Earth Sciences, University of Cambridge, Cambridge, UK (2015-2018)
  • Postdoc, CEOAS, Oregon State University, Corvallis, OR, USA (2014-2015)
  • Ph.D., Geology with minor in Oceanography, Oregon State University, Corvallis, OR, USA (2013)
  • B.S., Geophysical Sciences with honors, University of Chicago, Chicago, IL, USA (2007)

Google Scholar Page


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


Key publications: 

Dyonisius, M.N., Petrenko, V.V., Smith, A.M., Hua, Q., Yang, B., Schmitt, J., Beck, J., Seth, B., Bock, M., Hmiel, B., Vimont, I., Menking, J.A., Shackleton, S.A., Baggenstos, D., Bauska, T.K., Rhodes, R.H., Sperlich, P., Beaudette, R., Harth, C., Kalk, M., Brook, E.J., Fischer, H., Severinghaus, J.P., Weiss, R.F. (2020) Old carbon reservoirs were not important in the deglacial methane budgetScience. 367, 907.

Shackleton, S., Baggenstos, D., Menking, J.A., Dyonisius, M.N., Bereiter, B., Bauska, T.K., Rhodes, R.H., Brook, E.J., Petrenko, V.V., McConnell, J.R., Kellerhals, T., Häberli, M., Schmitt, J., Fischer, H., Severinghaus, J.P. (2020) Global ocean heat content in the Last Interglacial. Nature Geoscience. 13, 77–81. doi:10.1038/s41561-019-0498-0

Menking, J.A., Brook, E.J., Shackleton, S.A., Severinghaus, J.P., Dyonisius, M.N., Petrenko, V., McConnell, J.R., Rhodes, R.H., Bauska, T.K., Baggenstos, D., et al. (2019) Spatial pattern of accumulation at Taylor Dome during Marine Isotope Stage 4: stratigraphic constraints from Taylor Glacier. Clim. Past 15, 1537–1556.

Shackleton, S., Bereiter, B., Baggenstos, D., Bauska, T. K., Brook, E. J., Marcott, S. A., & Severinghaus, J. P. (2019) Is the noble gas‐based rate of ocean warming during the Younger Dryas overestimated? Geophysical Research Letters, 46, 5928-5936.

Evans, N. P., Bauska, T. K., Gázquez-Sánchez, F., Brenner, M., Curtis, J. H., and Hodell, D. A., (2018). Quantification of drought during the collapse of the classic Maya civilization. Science, 361 (6401), 498-501. DOI: 10.1126/science.aas9871 

Bauska, T. K., Brook, E. J., Marcott, S. A., Baggenstos, D., Shackleton, S., Severinghaus, J. P., & Petrenko, V. V. (2018). Controls on millennial‐scale atmospheric CO2 variability during the last glacial period.  Geophysical Research Letters45

Gázquez, F., Morellón, M., Bauska, T., Herwartz, D., Surma, J., Moreno, A., Staubwasser, M., Valero-Garcés, B., Delgado-Huertas, A., and Hodell, D.A. (2018). Triple oxygen and hydrogen isotopes of gypsum hydration water for quantitative paleo-humidity reconstruction. Earth and Planetary Science Letters 481, 177–188.

Bauska, T.K., Walters, G. Gázquez, F., and Hodell, D.A., (2017). Online Differential Thermal Isotope Analysis of Hydration Water in Minerals by Cavity Ringdown Laser Spectroscopy. Analytical Chemistry, Article ASAP, DOI: 10.1021/acs.analchem.7b03136

Petrenko, V. V., Smith, A. M., Schaefer, H., Riedel, K., Brook, E., Baggenstos, D., Harth, C., Hua, Q., Buizert, C., Schilt, A., Fain, X., Mitchell, L., Bauska, T., Orsi, A., Weiss, R. F., Severinghaus, J. P. (2017). Minimal geological methane emissions during the Younger Dryas–Preboreal abrupt warming event. Nature, 548, 443–446.

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. Climate of the Past, 13, 943-958,

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. PNAS 113 (13) 3465-3470, 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. Geochimica et Cosmochimica Acta, 177, 62-77

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. Nature Geoscience 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.



Royal Society University Research Fellow
Dr Thomas Keith Bauska

Contact Details

Email address: 
British Antarctic Survey
High Cross, Madingley Road
+44 (0) 1223 221731


Person keywords: 
Stable isotopes
palaeoclimate reconstructions