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Mark Thiemens
Atmospheric chemistry: physical chemistry of isotope effects; solar system formation
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| Contact Information |
| Dean, Division of Physical Sciences |
| Office: UHA 3020D |
| Phone: (858) 534-6732 |
| Fax: (858) 822-0389 |
| Email: mthiemens@ucsd.edu |
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| Education and Appointments |
| 1977 |
Ph.D., Florida State University
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| 1972 |
B.S., University of Miami
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| Awards and Academic Honors |
| 2007 |
Elected, Fellow, European Association for Geochemistry |
| 2006 |
Elected, National Academy of Sciences |
| 2006 |
Asteroid (7004) Markthiemens named in his honor, International Astronomical Union |
| 2006 |
Elected, Fellow American Geophysical Union |
| 2002 |
Elected, American Academy Arts and Sciences |
| 2002 |
American Chemical Society Distinguished Scientist of the year (San Diego) |
| 2001 |
Chancellors Associates Award for Excellence in Research |
| 1999 - |
Dean of Physical Sciences |
| 1999 |
E.O. Lawrence Award, U.S. Department of Energy |
| 1999 |
Chancellors Associates Chair |
| 1999 |
BiCentennial Volume of Who's Who in Science and Engineering |
| 1990-1991 |
Alexander von Humboldt Fellowship |
| 1984-1989 |
Camille and Henry Dreyfus Teacher-Scholar |
| 1977-1980 |
Postdoctoral Fellow, Enrico Fermi Institute, University of Chicago |
| Research Interests |
In our laboratory, we have developed the analytical capability to measure stable isotope variations at ultra-high precision (0.04 parts per thousand) in sulfur (34S/32S, 33S/32S), oxygen (18O/16O, 17O/16O), carbon (13C/12C), and nitrogen (15N/14N). Using this high precision as a diagnostic tracer, we have developed experimental programs in widely varying research fields which include atmospheric chemistry, the physical chemistry of photochemical reactions, early solar system history, paleo atmospheres, and the origin of life and of the solar system.
Our group employs stable isotope measurements to delineate the fates of different atmospheric species. From combined laboratory photochemistry experiments and field (tropo- and stratospheric) measurements, we are able to determine specific reaction pathways. High altitude samples are taken from aircraft, balloons and rockets to as high as 60 km. Our research sampling focuses upon studying the global impact by many important atmospheric molecules. These species include carbon dioxide, nitrous oxide, carbon monoxide, ozone, and sulfate (acid rain). These samples are collected throughout the world and include our work at the South Pole and in tropical rainforests. Hemispheric aerosol transport is also studied.
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| Primary Research Area: |
Interdisciplinary Specialties: |
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Physical/Analytical Chemistry
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Atmospheric and Environmental
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| Selected Publications |
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Carbon Dioxide and Oxygen Isotope Anomalies In The Mesosphere and Stratosphere. With M. H. Thiemens, T. Jackson, E. C. Zipf, P. W. Erdman, and C. Van Egmond. Science. 270, 969 (1995).
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Mass Independent Isotope Effects in Planetary Atmospheres and the Early Solar System. With M. H. Thiemens. Science. 283, 341 (1999).
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Triple Isotope Composition of Atmospheric Oxygen as a Tracer of Biosphere Productivity. With Luz, Boaz, Barkan, Eugeni, M. L. Bender, M. H. Thiemens, and K. A. Boering. Nature. 404, 547 (1999).
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Evidence of Atmospheric Sulphur in the Martian Regolith from Sulphur Isotopes in Meterorites. With J. Farquhar, J. Savarino, T. L. Jackson, and M. H. Thiemens. Nature. 404, 50-52 (2000).
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Atmospheric Influence of the Earth's Earliest Sulfur Cycle. With J. Farquhar, H. Bao, and M. H. Thiemens. Science. 289, 756 (2000).
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Mass-Independent Isotopic Compositions in Terrestrial and Extraterrestrial Solids and Their Applications. With. J. Savarino, J. Farquhar, and H. Bao. Acct. Chem. Res. 34, 645 (2001).
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Climate Driven Changes in Oxidation Pathways of Atmospheric Sulfur. Geophys. Des. Letter. 29, 1681 (2002).
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Seawaterst Antarctic Ice Core Sulfur Isotope Measurements Over a Complete Glacial-Interglacial Cycle. With B. Alexander, M. H. Thiemens, J. Farquhar, A. J. Kaufman, J. Savarino, and R. J. Delmas. J. Geophys. Res., 108:18-1 18-7 (2003).
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Evidence from Sulfate Mass Independent Oxygen Isotopic Compositions of Dramatic Changes in Atmospheric Oxidation following Massive Volcanic Eruptions. With J. Savarino, S. Bekki, J. Cole-Dai, and M. H. Thiemens. J. Geophys. Res., 108:7-1 7-6 (2003).
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Dissociation Energies of Xix NO2 Isotopologues by Laser Induced Fluorescence Spectroscopy and Zero Point Energy of Some Triatomic Molecules. With G. Michalski, R. Jost, D. Sugny, M. Joyeux, and M. Thiemens. J. Chem. Physics, 121:7153-7161 (2004).
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