Dr. Margaret S. Avery
Address: Earth & Planetary Science
University of California, Berkeley
307 McCone Hall
Berkeley, CA 94720-4767
Ph.D. 2017 Earth Science, Scripps Institution of Oceanography, UCSD
Dissertation: Long-term geomagnetic variations: Linking paleomagnetic observations,
statistical analyses, and numerical geodynamo simulations
Advisors: Catherine Constable, Jeffrey Gee, and David Gubbins
M.S. 2014 Earth Science, Scripps Institution of Oceanography, UCSD
B.A. 2009 Physics, State University of New York at Geneseo
Dual Major: Geophysics, Minor: Mathematics
2018, 2020 Co-Creator and Instructor, EPS 88 PyEarth: A Python Introduction of Earth Science, UC Berkeley
2020 Postdoctoral Researcher, UC Berkeley
2017-2019 NSF Earth Sciences Postdoctoral Fellow, UC Berkeley
2015 Teaching Assistant, SIO 1 The Planets, SIO, UCSD
2014 Teaching Assistant, SIO 113 Introduction to Computational Earth Science, SIO, UCSD
2011-2017 Graduate Student Researcher, SIO, UCSD
2009-2011 Abstractor, Crossroads Abstract, Warsaw, New York, Searched the public records to craft a concise history of all documents affecting a particular real-estate property
2007-2009 Laboratory Instructor, ASTR 101 Introductory Astronomy Lab, SUNY Geneseo
Paleomagnetism and geomagnetism, and study of Earth’s deep interior
- The history of the geomagnetic field and the origin of the geodynamo
- Factors that impact the quality of the data that make up the paleomagnetic record
- Dynamical processes in the outer core, and core/mantle interactions, which generate the observed behavior of the geomagnetic field at Earth’s surface
NSF Earth Section Postdoctoral Fellow, UC Berkeley, Berkeley, CA, 2017-2019
Advisors: Bruce Buffett and Nicholas Swanson-Hysell
- NSF EAR-PF, Mesozoic Geomagnetic Field Behavior: Exploring Mesozoic core dynamics by tuning numerical geodynamo simulations to paleomagnetic observations. Use an interdisciplinary approach combining paleomagnetic observations and geodynamo numerical simulations to study the geodynamo and Earth’s magnetic field during the Mesozoic. The geomagnetic field transitioned from the Mesozoic Dipole Low with low intensity and rapid polarity reversals to the Cretaceous Normal Superchron during which the field did not reverse polarity for ~40 million years.
Graduate Student Research
Scripps Institution of Oceanography, UCSD, La Jolla, CA, 2011-2017
Advisors: Catherine Constable, Jeffrey Gee, and David Gubbins
- Tuning the Geodynamo- Run simulations of the Earth’s liquid outer core. Analyze the statistical properties of the magnetic field generated and the energy of the fluid flow. By comparing these properties to observations of the geomagnetic field we can make geodynamo simulations that are more Earth-like, with the goal of learning more about the geomagnetic field and about the dynamics of the outer core.
- Paleointensity of Ignimbrites- [Two weeks of field work in Bishop, CA August 2011] Collected cores and hand samples from the Bishop Tuff. Paleomagnetic and rock-magnetic properties of these samples, along with samples from Mt. St. Helens and Mt. Katmai, were measured. The goal of the project is to determine if ignimbrites are able to accurately record the intensity of the Earth’s magnetic field.
- Asymmetry in Growth and Decay of the Geomagnetic Dipole Revealed in Seafloor Magnetization- Stacked and inverted near-bottom marine magnetic anomaly data from three surveys: a 0 to 780 kyr record from the East Pacific Rise at 19°S, a 0 to 5.2 Ma record from the Pacific Antarctic Ridge at 51°S, and a chron C4Ar-C5r (9.3-11.2 Ma) record from the NE Pacific. The goal of this project is to test if seafloor magnetization carries a record of the asymmetry between growth and decay rates first found in PADM2M and if it was present during other time periods.
9. Chi-Durán, R., M.S. Avery, N. Knezek, and B.A. Buffett, 2020. Decomposition of geomagnetic secular acceleration into traveling waves using complex empirical orthogonal function. Geophysical Research Letters, 47(17). doi:10.1029/2020GL087940
8. Buffett, B., W. Davis, and M.S. Avery, 2019. Variability of millennial-scale trends in the geomagnetic1axial dipole. Geophysical Research Letters, 46(24), 14450-14458. doi:10.1029/2019GL085909
7. Buffett, B. and M.S. Avery, 2019. How does temporal resolution influence geomagnetic reversal statistics? Geophysical Research Letters, 46 (10), 5146-5152. doi:10.1029/2019GL082976
6. Avery, M.S., C.G. Constable, C. Davies, D. Gubbins, 2018. Spectral methods for analyzing energy balances in geodynamo simulations. Physics of the Earth and Planetary Interiors, 286, 127-137. doi:10.1016/j.pepi.2018.10.002
5. Avery, M.S., J.S. Gee, J.A., Bowles, M.J. Jackson, 2018. Paleointensity estimates from ignimbrites: The Bishop Tuff Revisited. Geochem. Geophys. Geosyst., 19 (10), 3811-3831. doi: 10.1029/2018GC007665
4. Avery, M.S., C.G. Constable, and J.S. Gee, 2017. Asymmetry in Growth and Decay of the Geomagnetic Dipole Revealed in Seafloor Magnetization. Earth and Planetary Science Letters, 467 (1), 79-88. doi:10.1016/j.epsl.2017.03.020
3. Chourasia, A., M. Avery, A. Willis, S. Greenwood, C. Davies, C. Constable, and D. Gubbins, 2016. Visualization of Geodynamo Simulations. In Proceedings of the XSEDE16 Conference on Diversity, Big Data, and Science at Scale (XSEDE16). 58:1-58:3. doi:10.1145/2949550.2952772
2. Matsui, H., et al., 2016. Performance benchmarks for a next generation numerical dynamo model. Geochem. Geophys. Geosyst., 17(5), 1586-1607. doi: 10.1002/2015GC006159
1.Bowles, J.A., J.S. Gee, M.J. Jackson, and M.S. Avery, 2015. Geomagnetic paleointensity in historical pyroclastic density currents: Testing the effects of emplacement temperature and postemplacement alteration. Geochem. Geophys. Geosyst., 16(10), 3607-3625. doi: 10.1002/2015GC005910
10/5/2018 Center for the Origin, Dynamics and Evolution of Planets Seminar, UC Santa Cruz
2/13/2018 Berkeley Seismology Lab Seminar, UC Berkeley
2019 Session Co-convener, AGU Fall 2019
Planetary Magnetism and Core Processes: Earth and Beyond
2019-2020 Post-doc Coordinator and Mentor UC Berkeley Society of Women in the Physical Sciences
2018 Mentor UC Berkeley Society of Women in the Physical Sciences (SWPS)
2015-2016 AGU Honors Award Committee, Edward A. Flinn III Award
2016 Splash at UCSD, developed and taught a 1 hour course for high school students, Planet Earth: The Giant Magnet
2014-2015 SIO peer mentors program, mentor to a first year student in the geo. curricular group
2013-2014 Earth Section Seminar Coordinator, SIO
2012-2014 Institute of Geophysics and Planetary Physics, Geophysics Graduate Student Representative, SIO
June 2019 Summer Institute for Preparing Future Faculty, UC Berkeley, CA
July 2018 CIDER 2018 Summer Program, UC Santa Barbara, CA
Jan. 2017 MagIC Science & Database Workshop, SIO, La Jolla, CA
Sept. 2015 Inspiring Research: Creative Strategies for Communication, UCSD, La Jolla, CA
Feb. 2015 Geodynamo Benchmarking Workshop, Computational Infrastructure for
Geodynamics, Boulder CO
Feb. 2015 National Association of Geoscience Teachers Workshop, SIO, La Jolla, CA
May 2013 MagIC Science & Database Workshop, SIO, La Jolla, CA
June 2013 Summer School for Rock Magnetism, Institute for Rock Magnetism, University of Minnesota
June 2012 Ninth Santa Fe Conference on Rock Magnetism, Institute for Rock Magnetism,
Santa Fe, NM
Sept. 2011 MagIC Science & Database Workshop, SIO, La Jolla, CA
American Geophysical Union
Select Conference Abstracts
Avery, M.S., B. Buffett, 2019. Quantifying changes in dipole polarity reversal frequency using a combination of geodynamo simulations and stochastic models. (Invited) Abstract GP33A-07 presented at the 2019 Fall Meeting, AGU, San Francisco, Calif., 9-13 December 2019.
Avery, M.S., B. Buffett, 2019. Singular Spectral Analysis Decomposition of Geomagnetic and Stochastic Axial Dipole Moment Models Reveal Long-Period Oscillations. Abstract GP33A-07 presented at the 2019 Fall Meeting, AGU, San Francisco, Calif., 9-13 December 2019.
Chi-Duran, R., M.S. Avery, B.A. Buffett, 2019. Complex wave decomposition of geomagnetic secular acceleration in the equatorial region of Earth’s core. Abstract GP43B-0803 presented at the 2019 Fall Meeting, AGU, San Francisco, Calif., 9-13 December 2019.
Zhang, Y., N. Swanson-Hysell, M.S. Avery, 2019. A 1.1 billion-year-old anisotropy experiment: a study of anorthosite xenoliths within the Beaver River diabase. Abstract GP23B-0805 presented at the 2019 Fall Meeting, AGU, San Francisco, Calif., 9-13 December 2019.
Lv, M., M.S. Avery, B.A. Buffett, X. Chen, B. Chidester, J. Deng, S. Dorfman, B.J. Farcy, D.A. Frost, Z. Li, L. Liu, J.F. Martin, 2018. A multidisciplinary assessment of heat flux at the core mantle boundary. Abstract DI21B-0016 presented at the 2018 Fall Meeting, AGU, Washington, D.C. 10-14 December 2018.
Avery, M.S., C. Constable, and J. Gee, 2015. Further Evaluation of Geomagnetic Asymmetry in Growth and Decay. Abstract GP21A-07 presented at the 2015 Fall Meeting, AGU, San Francisco, Calif., 14-18 December 2015.
Avery, M.S., C. Constable, C. Davies, and D. Gubbins, 2014. Robust observations of asymmetry in growth and decay rates of the axial dipole in both geomagnetic field and geodynamo models. Abstract 605 presented at the 14th Symposium of the Earth’s Deep Interior, Shonan, Japan, 3-8 August 2014.
Gubbins, D., Willis, A., Davies, C., Jones, C.A., and M.S. Avery, 2013. Scalability of the Leeds Dynamo Code for Geodynamo Simulations. Abstract GP51A-1068 presented at the 2013 Fall Meeting, AGU, San Francisco, Calif., 9-13 December 2013.
Avery, M.S., J.S. Gee, J.A. Bowles, and M.J. Jackson, 2012. Magnetic property variation with vapor-phase alteration in the Bishop Tuff, and implications for paleointensity studies. Abstract GP21A-1146 presented at the 2012 Fall Meeting, AGU, San Francisco, Calif., 3-7 December 2012.