Catherine Johnson (scientist) explained

Catherine Louise Johnson
Workplaces:Planetary Science Institute
University of British Columbia
Alma Mater:University of California, San Diego
Thesis Title:The geomagnetic field over the last 5 myr from lava flows, and properties of the Venusian lithosphere from Magellan data
Thesis Url:https://www.worldcat.org/oclc/
Thesis Year:1994
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Catherine L. Johnson is a planetary scientist known for her research on the magnetic fields of planets including Mercury, Venus, Earth and its moon, and Mars. In 2023, she was elected to the National Academy of Sciences.[1]

Education and career

Johnson has B.Sc. from the University of Edinburgh (1989),[2] and earned a Ph.D. in geophysics from Scripps Institution of Oceanography, University of California, San Diego in 1994. Following her Ph.D., she was a postdoctoral researcher at Carnegie Institution for Science until 1997, at which point she joined the IRIS Consortium where she worked until 2001. From 2001 until 2006, she worked at Scripps Institution of Oceanography and then she moved to the University of British Columbia.[3] In 2010, she joined the Planetary Science Institute.

In 2013, Johnson was elected a fellow of the American Geophysical Union who cited her "for significant contributions to understanding the magnetic fields and interior structures of the Moon and terrestrial planets".[4]

From 2019 until 2020, Johnson was the president Geomagnetism, Paleomagnetism and Electromagnetism section at the American Geophysical Union.

Research

Johnson is known for her research on magnetic fields of planets, and how they change over time. She uses chemical signals stored in lava flows to track changes in Earth's magnetic field,[5] [6] [7] which includes lava flows sampled in locations such as the Azores.[8] Her research on Mercury used the MESSENGER space probe to make observations of Mercury's magnetic field.[9] [10] [11] On Mars, Johnson tracks variability in Mars' magnetic field over time[12] [13] and uses the Mars Orbiter Laser Altimeter to track the topography of Mars' northern polar cap.[14] Johnson's research on Mars uses first magnetic sensor placed on Mars, part of the InSight lander, to reveal small scale details about Mars' magnetic field which was stronger than expected based on previous measurements using satellite data.[15] [16] Johnson is the only Canadian involved in the InSight mission,[17] [18] which is led by the United States' National Aeronautic and Space Administration (NASA).

Selected publications

Awards and honors

Notes and References

  1. Web site: 2023 NAS Election .
  2. Web site: 2018. Catherine L. Johnson CV at University of British Columbia. live. September 12, 2021. https://web.archive.org/web/20210912131551/https://www.eoas.ubc.ca/~cjohnson/CV/CLJ_CV_July2018.pdf . 2021-09-12 .
  3. Web site: Dr. Catherine Johnson. 2021-09-12. Planetary Science Institute. en.
  4. Web site: Johnson. 2021-09-12. Honors Program. en-US.
  5. Johnson. C. L.. Constable. Catherine G.. Catherine Constable. Tauxe. Lisa. Lisa Tauxe. 2003-06-27. GEOPHYSICS: Mapping Long-Term Changes in Earth's Magnetic Field. Science. en. 300. 5628. 2044–2045. 10.1126/science.1082007. 12829772. 118112727. 0036-8075.
  6. Johnson. Catherine L.. Constable. Catherine G.. 1995-09-01. The time-averaged geomagnetic field as recorded by lava flows over the past 5 Myr. Geophysical Journal International. 122. 2. 489–519. 10.1111/j.1365-246X.1995.tb07010.x. 1995GeoJI.122..489J. 0956-540X. free.
  7. Johnson. Catherine L.. Constable. Catherine G.. 1996-01-15. Palaeosecular variation recorded by lava flows over the past five million years. Philosophical Transactions of the Royal Society of London. Series A: Mathematical, Physical and Engineering Sciences. 354. 1704. 89–141. 10.1098/rsta.1996.0004. 1996RSPTA.354...89J. 84105412.
  8. Johnson. Catherine L.. Wijbrans. Jan R.. Constable. Catherine G.. Gee. Jeff. Staudigel. Hubert. Tauxe. Lisa. Forjaz. Victor-H.. Salgueiro. Mário. 1998. 40Ar/39Ar ages and paleomagnetism of São Miguel lavas, Azores. Earth and Planetary Science Letters. en. 160. 3–4. 637–649. 10.1016/S0012-821X(98)00117-4. 1998E&PSL.160..637J.
  9. Johnson. Catherine L.. Purucker. Michael E.. Korth. Haje. Anderson. Brian J.. Winslow. Reka M.. Al Asad. Manar M. H.. Slavin. James A.. Alexeev. Igor. I.. Phillips. Roger J.. Zuber. Maria T.. Solomon. Sean C.. 2012. MESSENGER observations of Mercury's magnetic field structure: MERCURY'S MAGNETIC FIELD STRUCTURE. Journal of Geophysical Research: Planets. en. 117. E12. n/a. 10.1029/2012JE004217. 2027.42/96229. 15704254 . free.
  10. Johnson. C. L.. Phillips. R. J.. Purucker. M. E.. Anderson. B. J.. Byrne. P. K.. Denevi. B. W.. Feinberg. J. M.. Hauck. S. A.. Head. J. W.. Korth. H.. James. P. B.. 2015-05-22. Low-altitude magnetic field measurements by MESSENGER reveal Mercury's ancient crustal field. Science. en. 348. 6237. 892–895. 10.1126/science.aaa8720. 25953822. 2015Sci...348..892J. 11088932. 0036-8075.
  11. Web site: May 2015. Charles Q. Choi 07. 2015-05-07. Mercury's Magnetism May Have Once Rivaled Earth's. 2021-09-12. Space.com. en.
  12. Johnson. Catherine L.. Mittelholz. Anna. Langlais. Benoit. Russell. Christopher T.. Ansan. Véronique. Banfield. Don. Chi. Peter J.. Fillingim. Matthew O.. Forget. Francois. Haviland. Heidi Fuqua. Golombek. Matthew. 2020. Crustal and time-varying magnetic fields at the InSight landing site on Mars. Nature Geoscience. en. 13. 3. 199–204. 10.1038/s41561-020-0537-x. 2020NatGe..13..199J. 211265951. 1752-0894.
  13. Web site: Williams. Matt. 2020-05-07. When Did Mars Lose its Global Magnetic Field?. 2021-09-12. Universe Today. en-US.
  14. Johnson. C. 2000. Lithospheric Loading by the Northern Polar Cap on Mars. Icarus. en. 144. 2. 313–328. 10.1006/icar.1999.6310. 2000Icar..144..313J.
  15. Web site: February 2020. Elizabeth Howell 26. 2020-02-26. Mars lander reveals new details about the Red Planet's strange magnetic field. 2021-09-12. Space.com. en.
  16. Web site: Williams. Matt. March 9, 2020. Magnetic Fields Around NASA's Mars Lander Are 10 Times Stronger Than Scientists Expected. live. 2021-09-12. ScienceAlert. en-gb. https://web.archive.org/web/20200309005527/https://www.sciencealert.com/magnetic-fields-around-nasa-s-mars-lander-are-10-times-stronger-than-scientists-expected . 2020-03-09 .
  17. News: November 26, 2018. 8 tense minutes, and then good news, for UBC planetary scientist involved in Mars landing. CBC. September 12, 2021.
  18. Web site: Crawford. Tiffany. January 9, 2018. UBC researcher to study earthquakes on Mars. live. 2021-09-12. vancouversun. en-CA. https://web.archive.org/web/20171228010805/http://vancouversun.com/news/local-news/ubc-researcher-to-study-earthquakes-on-mars . 2017-12-28 .
  19. Web site: Edward Bullard Lecture AGU. 2021-09-12. www.agu.org.
  20. 2019-02-01. RAS Awards 2019. Astronomy & Geophysics. en. 60. 1. 1.11–1.13. 10.1093/astrogeo/atz038. 1366-8781.

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