Website: Maureen Walczak, PhD
Curriculum Vitae for Maureen Walczak
Office: Burt 112, Lab: Burt 124
Research Interests
Application of foraminiferal stable isotopes (18O, 13C), trace element/Ca ratios (Mg/Ca, Mn/Ca, Sr/Ca) and radiogenic isotopes (14C, 10Be, 210Pb, 137Cs, 7Be, 234Th) in marine sediments for palaeoenvironmental reconstructions and sediment depositional histories
Geochemical (XRF, Nd, Sr, Pb isotopes) and paleomagnetic (u-channel cryogenic magnetometer, point-source magnetic susceptibility) studies of marine sediments
Physical properties studies of sediments (grain-size, Geotek MST, X-radiography, CT scan)
Investigating deglacial changes in meltwater input, stratification, and biogeochemical cycling in high-latitude environments.
Current Research
My predominant research focus is in Pacific paleoceanography. Specific projects in various states of progress include:
A radiocarbon-based reconstruction of North Pacific Intermediate Water (NPIW) circulation related to abrupt climate events of the past 50,000 years (w/Alan Mix, Joe Stoner, Stewart Fallon, Keith Fifield)
Establishing an environmental baseline for the Pacific Northwest: 12,000 years of climate and Columbia River discharge (w/Alan Mix, Joe Stoner, Summer Praetorius, Cris Lopes, Brendan Reilly)
A marine perspective of Pacific Northwest deglacial climate and the Missoula megafloods (w/Alan Mix, Joe Stoner, Summer Praetorius, Cris Lopes, Brendan Reilly, Ingrid Hendy)
Co-director of Oregon State University Marine Sediments Sampling (MARSSAM) Facility (w/ Mitch Lyle, Chris Goldfinger)
Education
PhD, Oregon State University, Oceanography, 2011
MS, University of Washington, Oceanography, 2006
BS, University of Washington, Earth and Space Sciences, 2004
BS, University of Washington, Oceanography, 2004
Experience
July 2011-Jan 2015 Super Science Fellow Postdoctoral Scholar, Australia National University. Novel Dating Methods for Marine Sediments of Relevance to Determining Past Climate Change (Supervisors: P. DeDeckker, K. Fifield, and A. Roberts)
June-July 2013 Shipboard Science Participant in IODP Exp. 341: Southern Alaska Margin Tectonics, Climate, and Sedimentation. Physical properties specialist.
2006-2011 PhD Student, College of Oceanic and Atmospheric Sciences, Oregon State University. Paleoclimate, Paleoventilation, and Paleomagnetism as Recorded in a 17kyr Marine Sediment Record from the SE Alaska Margin (Supervisors A.C. Mix and J.S. Stoner)
2010 Teaching Assistant, Oceanography, Oregon State University
2004-2006 MSc Student, Oceanography, University of Washington. Human and environmental impacts on Washington continental-shelf sedimentation: A thirty-year perspective (Supervisor: C. Nittrouer)
2005 Teaching Assistant, Oceanography, University of Washington
2003-2004 Laboratory Technician, Oceanography, University of Washington
Courses
OC201e - Introduction to Oceanography
GEO308e - Global Change and Earth Science
Publications
Stuut, J-B. W., P. De Deckker, M. Saavedra-Pellitero, F. Bassinot, A-J. Drury, M.H. Walczak, K. Nagashima, M. Murayama (2019), A 5.3-million-year history of monsoonal precipitation in northwestern Australia. Geophysical Research Letters. doi:10.1029/2019GL083035
Reilly, B.T., J.S. Stoner, A.C. Mix, M.H. Walczak, A. Jennings, M. Jakobsson, L. Dyke, K. Hogan, L.A. Mayer, S. Fallon, M Cheseby (2019), Holocene break-up and reestablishment of the Petermann Ice Tongue, Northwest Greenland. Quaternary Science Reviews. doi:10.1016/j.quascirev.2019.06.023
Jennings, A.E., J. Andrews, B. Oliver, M. Walczak, A. Mix (2019) Retreat of the Smith Sound Ice Stream in the Early Holocene. Boreas. doi:10.1111/bor.12391
Blake-Mizen, K., J.S. Stoner, R.G. Hatfield, A.E. Carlson, C. Xuan, M.H Walczak, K.T. Lawrence, J. Channell, I. Bailey (2019), Southern Greenland glaciation and Western Boundary Undercurrent evolution recorded on Eirik Drift during the late Pliocene intensification of Northern Hemisphere glaciation. Quaternary Science Reviews doi:10.1016/j.quascirev.2019.01.015
Du, J., A. Mix, B. Haley, A.C. Mix, M.H. Walczak, S.K. Praetorius (2018), Flushing of the deep Pacific drives deglacial rise of atmospheric CO2. Nature Geoscience. doi:10.1038/s41561-018-0205-6
Tynan, S., B.N. Opdyke, A. Dutton, M.H. Walczak, S. Fallon (2017), Late Holocene interannual temperature variability inferred from the δ18O of Ostrea angasi shells. Australian Journal of Earth Sciences: doi:10.1080/08120099.2017.1360939
Walczak, M.H., J.S. Stoner, A.C. Mix, D. Heslop, J. Channell, J. Jaeger, G. Rosen, J. Southon, C. Xuan, (2017), A 17,000 year Paleomagnetic Secular Variation record from the Gulf of Alaska, Earth and Planet. Sci. Lett. doi: 10.10.1016/j.epsl.2017.05.022
Carlson, A., Z. Kilmer, L.B. Ziegler, J.S. Stoner, G.C. Wiles, K. Starr, M.H. Walczak, W. Colgan, A.V. Reyes, D.J. Leydet, R.G. Hatfield, (2017), Recent retreat of Columbia Glacier, Alaska: Millennial context, Geology doi:10.1130/G38479.1
Montelli, A., S.P. Gulick, L.L. Worthington, A. Mix, M.H. Davies-Walczak, S. Zellers, J. Jaeger (2017), Late Quaternary glacial dynamics and sedimentation variability in Bering Trough, Gulf of Alaska. Geology 45(1) doi:10.1130/G38836.1
Tynan, S., B.N. Opdyke, M.H. Walczak, S. Eggins, A. Dutton (2016), Assessment of Mg/Ca in Saccostrea glomerata (the Sydney Rock oyster) shell as a potential temperature proxy, Palaeogeography, Palaeoclimatology, Palaeoecology doi:10.1016/j.palaeo.2016.08.009
Praetorius, S., A. Mix, M.H. Walczak, M. Wolhowe, F. Prahl (2015), North Pacific deglacial hypoxic events linked to abrupt ocean warming, Nature 527:362-366 doi:10.1038/nature15753
Gulick, S.P, J.M. Jaeger, A.C. Mix, H. Asahi, H. Bahlburg, C. Belanger, G.B.B. Berbel, L. Childress, E. Cowan, M.H. Davies-Walczak, L. Drab, F. Dottori, M. Forwick, A. f*ckumura, S. Ge, S. Gupta, A. Kioka, S. Konno, L. LeVay, C. März, K. Matsuzaki, E. McClymont, C. Moy, J. Müller, A. Nakamura, T. Ojima, K. Ridgeway, O. Romero, A. Slagle, J. Stoner, G. St-Onge, I. Suto, L. Worthington, I. Bailey, E. Enkelmann, and R. Reece (2015), Nonlinear feedback between tectonic uplift and glacial erosion constrained by Gulf of Alaska sedimentary record. Proceedings of the National Academy of Sciences 112(49):15042-15047 doi:10.1073/pnas.1512549112
Walczak, M.H., Mix, A.C., Willse, T., Slagle, A., Stoner, J.S., Jaeger, J., Gulick, S., LeVay, L., Kioka, A., and the IODP Expedition 341 Scientific Party (2015), Correction of non-intrusive drill core physical properties data for variability in recovered sediment volume. Geophysical Journal International 202(2):1317-1323 doi:10.1093/gji/ggv204
MacPhail, M., K. Fifield, B. Pillans, M. Davies, and G. Hope (2015), Lake George revisited: New evidence for the origin and evolution of a large closed lake, Southern Tablelands, NSW, Australia. Australian Journal of Earth Sciences 62(7):853-871 doi:10.1080/08120099.2015.1108365
Davies-Walczak, M.H., A.C. Mix, J.S. Stoner, J. Southon (2014), TLate Glacial to Holocene radiocarbon constraints on North Pacific Intermediate Water ventilation and deglacial atmospheric CO2 sources, Earth and Planetary Science Letters 397:57-66 doi:10.1016/j.epsl.2014.04.004
Jaeger, J.M., S.P.S. Gulick, L.J. LeVay, and Expedition 341 Scientists (2014), Proc. IODP, 341: College Station, TX (Integrated Ocean Drilling Program). doi:10.2204/iodp.proc.341.101.2014
Expedition 341 Scientists (2013), Southern Alaska margin: Interactions of tectonics, climate, and sedimentation. IODP Preliminary Report 341. doi:10.2204/iodp.pr.341.2014
Heslop, D., Roberts, A., L. Chiang, M.H. Davies, A. Abrazhevich, P. De Deckker (2013), Quantifying magnetite magnetofossil contributions to sedimentary magnetizations, Earth and Planetary Science Letters. doi:10.1016/j.epsl.2013.09.011
Addison, J.A., B.P. Finney, W.E. Dean, M.H. Davies, A.C. Mix, and J.M. Jaeger (2012), Productivity maxima and sedimentary d15N during the Last Glacial Maximum termination in the Gulf of Alaska, Paleoceanography 27(1) doi:10.1029/2011PA002161
Davies, M.H., A.C. Mix, J.S. Stoner, J.A. Addison, J. Southon (2011), The deglacial transition on the SE Alaska Margin; meltwater input, sealevel rise, enhanced productivity, and sedimentary hypoxia, Paleoceanography 26(2) doi:10.1029/2010PA002051
Tesi, T., M. Goni, L. Langone, P. Puig, M. Canals , C. Nittrouer , X. Durrieu de Madron, A. Calafat, A. Palanques , S.E Heussner , M.H. Davies, T. Drexler , J. Fabrés (2010), Re-exposure and advection of 14C-depleted organic carbon from old deposits at the upper continental slope, Global Biogeochemical Cycles. doi:10.1029/2009GB003745
