Ph.D. Oceanography, Oregon State University, December 2014

B.A. Geology, Portland State University, 2005                                                               

B.A. Anthropology, Portland State University, 2005  




Research Geologist (Micropaleontologist)

U.S. Geological Survey, 2016 – present

North Pacific paleoceanography using foraminifera-based micropaleontology (stable isotopes, radiocarbon, faunal assemblages), alkenone SST reconstructions, and the development of California abalone shells as a paleo proxy for SST variations. 


Postdoctoral Researcher in Global Climate Modeling

Department of Global Ecology, Carnegie Institution for Science, Stanford, 2015 – 2016

Assessing regional and global climate impacts of changes in ocean heat flux and sea surface temperature patterns using a global climate model (CESM).


National Science Foundation Graduate Research Fellow, 2009 – 2012

Graduate Research Assistant, 2012 – 2014

College of Earth, Ocean, & Atmospheric Sciences, Oregon State University 

Dissertation: Abrupt deglacial climate changes in the North Pacific and implications for climate tipping points.High-resolution deglacial climate reconstructions in marine sediment cores from the Gulf of Alaska. 


Research Assistant II

Geology & Geophysics Department, Woods Hole Oceanographic Institution, 2005 – 2008 

Examination of changes in deep-water mass formation in the North Atlantic during glacial terminations using grain size analysis and stable isotopes of foraminifera.


NSF Research Experience for Undergraduates Fellowship

Geology & Geophysics Department, Woods Hole Oceanographic Institution, 2004 

Grain size analysis of a deep-sea core in the North Atlantic used to infer changes in the strength of North Atlantic deep water over the past 25,000 years.


PUBLICATIONS: see publication page




INVITED:Praetorius, S.K, Mix, A.C., Condron, A.,Walczak, M., McKay, J.L., Du, J. The role of North Pacific Ocean variability in abrupt deglacial climate change. International Conference on Paleoceanography, Sydney, Australia, 2019. 


INVITED: Praetorius, S.K, Condron, A., Mix, A.C., Walczak, M., McKay, J.L., Du, J. Northeast Pacific cooling and freshening events during early Heinrich Stadial 1 and the Younger Dryas: links to the Missoula megafloods? GSA annual meeting, Seattle, 2017.


INVITED: Praetorius, S.K, Condron, A., Mix, A.C., Walczak, M., McKay, J.L., Du, J. Impacts of deglacial meltwater and Columbia River megafloods on North Pacific ocean circulation and climate.Mary Louise Riley Seminar Series at the University of California, Davis Bodega Marine Laboratory (BML), March 2018.


INVITED: Praetorius, S.KImpacts of Missoula Megafloods on North Pacific Ocean circulation. Association for Women Geoscientists & Peninsula Geological Society, Stanford, Dec 2017.


INVITED: Praetorius, S.K Tipping points in the climate system. Hudson Valley Climate Summit, Poughkeepsie Day School, NY, Sept 2017.


INVITED: Praetorius, S., Rugenstein, M. Persad, G. Caldeira, K. Impacts of changes in North Pacific and North Atlantic heat flux on Arctic surface temperature. Pacific Climate Variability Workshop, Pacific Grove, CA, 2017.


Praetorius, S.K., Mix, A.C., Jensen, B., Froese, D., Milne, G., Wolhowe, M., Prahl, F. Rapid response of volcanism to deglaciation in Southeast Alaska and attendant climate impacts.AGU fall meeting, San Francisco, 2015.


Praetorius, S.K., Mix, A.C. Synchronous heat transport in the North Pacific and North Atlantic as a mechanism for abrupt northern hemisphere warming. INQUA Congress, Nagoya, Japan, 2015.


INVITED: Praetorius, S.K., Mix, A.C., Prahl, F., Wolhowe, M., Davies, M. Timing of Cordilleran ice rafting, freshwater discharge, and implications for subsurface ventilation in the Northeast Pacific during the last deglaciation. American Geophysical Union fall meeting, San Francisco, 2014.


Praetorius, S.K., Mix, A.C., Prahl, F., Wolhowe, M., Davies, M. North Pacific hypoxia linked to abrupt warming in the early Holocene.PAGES Holocene workshop, Mt. Hood, OR, 2014.


Praetorius, S.K. & Mix, A.C. Oceanic Variability in the Gulf of Alaska during the Younger Dryas. International Union for Quaternary Research (INQUA) congress, Bern, Switzerland 2011. 


Praetorius, S.K. & McManus, J.F. Dynamic Proxies of Ocean Circulation in the North Atlantic During the Younger Dryas. AGU Joint Assembly, Acapulco, Mexico 2007. 




Praetorius, S.K., Rugenstein, M., Caldeira, K. Arctic climate sensitivity to changes in North Pacific and North Atlantic ocean heat flux. AGU fall meeting, 2016


Praetorius, S.K., Rugenstein, M., Caldeira, K. North Pacific Ocean warming enhances Arctic amplification. International conference on paleoceanography, Utrecht, 2016


Praetorius, S.K., Mix, A.C. Surface to deep ventilation changes in the Northeast Pacific during the last deglaciation. INQUA Congress, Nagoya, Japan, 2015.


Praetorius, S.K., Mix, A.C., Jensen, B., Froese, D. Deglacial volcanism in the Gulf of Alaska: Implications for timing and forcing of North Pacific climate transitions. AGU Chapman conference on Volcanism & the Atmosphere, Selfoss, Iceland, 2012.


Praetorius, S.K. & Mix, A.C. Timing of deglacial transitions in the Gulf of Alaska and implications for forcing mechanisms. International Conference on Paleoceanography, San Diego, CA 2010.


Praetorius, S.K. & Mix, A.C. Pacific perspectives on the Younger Dryas cooling event.Geological Society of America meeting, Portland, OR 2009. 


Praetorius, S.K. & McManus, J.F. A Sediment Record of Bottom Currents in the North Atlantic since the Last Ice Age:Sigma Xi National Conference, Seattle, WA 2005 (Poster award)&American Society of Limnology and Oceanography meeting, Salt Lake City, UT 2005.




Conveners: Walczak, M., Pak, D., Praetorius, S., Myhre, S. Placing the North Pacific in a Global Climate Framework.Ocean Sciences meeting, Portland, OR 2017.


Conveners: Harrop, B., Frierson, D., Martineau, P., Simpson, I., Swann, A., Persad, G., Praetorius, S. Atmospheric Circulation and Hydrological Cycle under a Changing Climate: Monsoons, Storm Tracks, and the ITCZ. American Geophysical Union Fall Meeting, 2016.


Conveners: Praetorius, S., Addison, J., Strano, S. The role of the North Pacific on climate variability. AGU Ocean Sciences meeting, Portland, OR 2010.