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Robert Kopp

Research Associate

My research interests focus on Earth history, especially the evolution of global biogeochemical cycles and paleoclimate, and its implications for future changes to Earth systems. I am currently working on integrating Pleistocene interglacial sea-level records as a way of constraining ice sheet stability. I am also using geochemical and environmental magnetic techniques to produce high-resolution climate records from the early Eocene Hothouse period, likely the last time carbon dioxide levels exceeded levels expected by the end of the century under a business-as-usual scenario.

Publications:

Peer-reviewed publications

R. E. Kopp, T. D. Raub, D. Schumann, H. Vali, A. V. Smirnov, and J. L. Kirschvink (in press). Magnetofossil Spike During the Paleocene-Eocene Thermal Maximum: Ferromagnetic Resonance, Rock Magnetic, and Electron Microscopy Evidence from Ancora, New Jersey, USA. Paleoceanography.

R. E. Kopp and J. L. Kirschvink (2007). The identification and biogeochemical interpretation of fossil magnetotactic bacteria. Earth Sci. Rev. doi:10.1016/j.earscirev.2007.08.001 [Journal link]

A. C. Maloof, R. E. Kopp, J. P. Grotzinger, D. A. Fike, T. Bosak, H. Vali, P. M. Poussart, B. P. Weiss, and J. L. Kirschvink (2007). Sedimentary iron cycling and the origin and preservation of magnetization in platform carbonate muds, Andros Island, Bahamas. Earth Planet. Sci. Lett. 259: 581-598. doi:10.1016/j.epsl.2007.05.021 [Journal link]

R. E. Kopp (2007). The identification and interpretation of microbial biogeomagnetism. Ph.D. Thesis. Division of Geological and Planetary Sciences, California Institute of Technology. 190 pp.

R. E. Kopp, C. Z. Nash, A. Kobayashi, B. P. Weiss, D. A. Bazylinski, and J. L. Kirschvink (2006). Ferromagnetic resonance spectroscopy for assessment of magnetic anisotropy and magnetostatic interactions: A case study of mutant magnetotactic bacteria. J. Geophys. Res. B 111, B12S25. doi:10.1029/2006JB004529 [Journal link]

M. Liang, H. Hartman, R. E. Kopp, J. L. Kirschvink, and Y. L. Yung (2006). Production of hydrogen peroxide in the atmosphere of a Snowball Earth and the origin of oxygenic photosynthesis. Proc. Natl. Acad. Sci. 103: 18896-18899. doi:10.1073/pnas.0608839103 [Journal link]

R. E. Kopp, B. P. Weiss, A. C. Maloof, H. Vali, C. Z. Nash, and J. L. Kirschvink (2006). Chains, clumps, and strings: magnetofossil taphonomy with ferromagnetic resonance spectroscopy. Earth Planet. Sci. Lett. 247: 10-25. doi:10.1016/j.epsl.2006.05.001 [Journal link]

A. Kobayashi, J. L. Kirschvink, C. Z. Nash, R. E. Kopp, D. A. Sauer, L. E. Bertani, W. F. Voorhout, and T. Taguchi (2006). Experimental observation of magnetosome chain collapse in magnetotactic bacteria: Sedimentological, paleontological, and evolutionary implications. Earth Planet. Sci. Lett. 245: 538-550. doi:10.1016/j.epsl.2006.03.041 [Journal link]

Y. Suzuki, R. E. Kopp, et al (2006). Sclerite formation in the hydrothermal-vent "scaly-foot" gastropod -- possible control of iron sulfide biomineralization by the animal. Earth Planet. Sci. Let. 242: 39-50. doi:10.1016/j.epsl.2005.11.029 [Journal link]

R. E. Kopp, J. L. Kirschvink, I. A, Hilburn, and C. Z. Nash (2005). The Paleoproterozoic Snowball Earth: A climate disaster triggered by the evolution of oxygenic photosynthesis. Proc. Natl. Acad. Sci. 102: 11131-11136. doi:10.1073/pnas.0504878102 [Journal link]

B.P. Weiss, S.S. Kim, J.L. Kirschvink, R.E. Kopp, M. Sankaran, A. Kobayashi, and A. Komeili (2004). Ferromagnetic resonance and low-temperature magnetic tests for biogenic magnetite. Earth Planet. Sci. Lett. 224: 73-89. doi:10.1016/j.epsl.2004.04.024 [Journal link]

B.P. Weiss, S.S. Kim, J.L. Kirschvink, R.E. Kopp, M. Sankaran, A. Kobayashi, and A. Komeili (2004). Magnetic tests for magnetosome chains in Martian meteorite ALH84001. Proc. Natl. Acad. Sci. 101: 8281-4. doi:10.1073/pnas.0402292101 [Journal link]

R.E. Kopp and M. Humayun (2003). Kinetic model of carbonate dissolution in Martian meteorite ALH84001. Geochim. Cosmochim. Acta 67, 3247-3256. doi:10.1016/S0016-7037(02)01114-6 [Journal link]
 

Popular Publications

Geology reader for S. Darksyde and M. Sumner (2006). Kosmos: You are Here. YearlyKos.org. Electronic book.

Ghostwriter for J. L. Kirschvink (2006). Red Earth, White Earth, Green Earth, Black Earth. Engineering & Science No. 4: 10-20.

R. E. Kopp and J. L. Kirschvink (2004). The world's worst climate disaster. In: Miracle Planet II: The Evolution of Our World. Tokyo: NHK (Japan Broadcasting Corporation). [published in Japanese]
 

Selected Presentations and Abstracts

Invited talks are indicated by an *)

R. E. Kopp and J. L. Kirschvink (2007). A scoring scheme for evaluating magnetofossil identifications. American Geophysical Union Fall Meeting, San Francisco, CA, December 2007.

S. M. Tikoo, R. E. Kopp, A. V. Smirnov, T. D. Raub, D. Schumann, H. Vali, and J. L. Kirschivnk (2007). Testing the Paleocene-Eocene Thermal Maximum Magnetofossil Spike Hypothesis. American Geophysical Union Fall Meeting, San Francisco, CA, December 2007.

D. Schumann, T. D. Raub, R. E. Kopp, S. M. Tikoo, S. K. Sears, U. Leucken, I. Rouiller, A. V. Smirnov, J. L. Kirschvink, and H. Vali (2007). Possible Eukaryotic Magnetite in the Paleocene-Eocene Boundary Clay, Ancora, New Jersey. American Geophysical Union Fall Meeting, San Francisco, CA, December 2007.

R. E. Kopp, T. D. Raub, D. Schumann, H. Vali, A. V. Smirnov, and J. L. Kirschvink (2007). Magnetofossil spike during the Paleocene-Eocene Thermal Maximum: Ferromagnetic resonance, rock magnetic, and electron microscopy evidence from the Atlantic Coastal Plain of New Jersey. Geological Society of America Annual Meeting, Denver, CO, Paper 183-11, October 2007.

* R. E. Kopp, A. C. Maloof, B. P. Weiss, and J. L. Kirschvink (2006). Assessing the source of magnetization in sediments with rock magnetism and ferromagnetic resonance spectroscopy. Geological Society of America Annual Meeting, Philadelphia, PA, Paper No. 164-6, October 2006.

A. C. Maloof, R. E. Kopp, J. P. Grotzinger, B. P. Weiss, H. Vali, and J. L. Kirschvink (2006). The origin and preservation of magnetization in platformal carbonate muds, Andros Island, Bahamas. Geological Society of America Annual Meeting, Philadelphia, PA, Paper No. 164-7, October 2006.

* R. E. Kopp, C. Z. Nash, B. P. Weiss, A. C. Maloof, A. Kobayashi, H. Vali, and J. L. Kirschvink (2006). Identifying magnetotactic bacteria and their fossils with ferromagnetic resonance. Goldschmidt Conference, Melbourne, Australia, Abstract No. 206.00, August 2006.

* R. E. Kopp, C. Z. Nash, B. P. Weiss, A. C. Maloof, A. Kobayashi, H. Vali, and J. L. Kirschvink (2006). Identifying magnetotactic bacteria and their fossils with ferromagnetic resonance. Southern California Geobiology Symposium, Riverside, CA, April 2006.

R. E. Kopp, B. P. Weiss, J. L. Kirschvink, C. Z. Nash, and A. C. Maloof (2006). Fossil magnetotactic bacteria: an iron biosignature. Astrobiology Science Conference, Washington, DC, Astrobiology 6(1), Abstract 20, March 2006.

R. E. Kopp, J. L. Kirschvink, B. P. Weiss, and A. C. Maloof (2005). Identification of magnetosome chains by ferromagnetic resonance spectroscopy. American Geophysical Union Fall Meeting, San Francisco, CA, Eos Trans. AGU 86(52), Fall Meet. Suppl., Abstract B24A-03, December 2005.

A. C. Maloof, J. P. Grotzinger, R. E. Kopp, B. P. Weiss, H. Vali, and J. L. Kirschvink (2005). On the origin of magnetization in platformal carbonate muds. American Geophysical Union Fall Meeting, San Francisco, CA, Eos Trans. AGU 86(52), Fall Meet. Suppl., Abstract B24A-07, December 2005.

J. L. Kirschvink and R. E. Kopp (2005). A Paleoproterozoic origin of oxygenic photosynthesis as a trigger for the Makganyene Snowball Earth. Earth System Processes 2, Calgary, Alberta, Canada, Paper No. 11-7, August 2005.

R. E. Kopp, J. L. Kirschvink, and B. P. Weiss (2005). Magnetofossils as a novel tracer of ancient microbial communities and environments. Southern California Geobiology Symposium, Los Angeles, CA, April 2005

R. E. Kopp, C. Z. Nash, J. L. Kirschvink, and J. R. Leadbetter (2004). A possible magnetite/maghemite battery in the magnetotactic bacteria. American Geophysical Union Fall Meeting, San Francisco, CA, Eos Trans. AGU 85(47), Fall Meet. Suppl., Abstract GP34A-06, December 2004.

* R. E. Kopp, B. P. Weiss, S. S. Kim, and J. L. Kirschvink (2004). Ferromagnetic resonance spectroscopy in the hunt for magnetofossils. Institute for Rock Magnetism Santa Fe 6, Santa Fe, NM, June 2004.

R. E. Kopp, C. Z. Nash, and J. L. Kirschvink (2004). Magnetosome batteries, magnetofossils, and the evolution of the planetary redox state. Southern California Geobiology Symposium, Pasadena, CA, February 2004.

* R. E. Kopp, J. L. Kirschvink, D. K. Newman, C. Z. Nash, and I. A. Hilburn (2003). Bacterial Bolsheviks: PS II and the evolution of the oxygenic revolution. American Geophysical Union Fall Meeting, San Francisco, CA, Eos Trans. AGU 84(46), Fall Meet. Suppl., Abstract U52B-07, December 2003.