A. Hope Jahren, Ph.D. School of Ocean and Earth Science and Technology, University of Hawaii, Honolulu, HI 96822 Email: [email protected];

A. Hope Jahren, Ph.D. School of Ocean and Earth Science and Technology, University of Hawaii, Honolulu, HI 96822 Email: Jahren@Hawaii.Edu;

Jahren cv, page 1 of 6

A. Hope Jahren, Ph.D. School of Ocean and Earth Science and Technology, University of Hawaii, Honolulu, HI 96822 email: [email protected]; http://www.jahrenlab.com

BIRTHDATE Born September 27, 1969 in Austin, Minnesota

EDUCATION Ph.D. in Soil Science, University of California at Berkeley, 1996 B.A. cum laude in Geology, University of Minnesota at Minneapolis, 1991

ACADEMIC EMPLOYMENT Full Professor with Tenure, School of Ocean and Earth Science and Technology, University of Hawaii, 07/08 – present Full Professor with Tenure, Geobiology, Johns Hopkins University, 07/06 – 06/08 Associate Professor of Geobiology, Johns Hopkins University, 07/03 – 06/06 Assistant Professor of Geobiology, Johns Hopkins University, 09/99 – 06/03 Assistant Professor of Geochemistry, Georgia Tech, 09/96 -- 09/99 Postdoctoral Researcher in Environmental Science, UC Berkeley, summer 1996

HONORS AND AWARDS 2013 Best University Research Award, Department of Energy, Geosciences Division 2011 Aldo Leopold Leadership Fellow 2010 Fulbright Award in Arctic Science (Norway) 2010 Exceptional Reviewer, Geology 2010 Scientist of the Year: ARCS Honolulu Chapter 2005 Named one of the Popular Science “Brilliant 10” 2005 James B. Macelwane Medal: American Geophysical Union Young Scientist Award 2005 Biogeochemistry Fellow: American Geophysical Union 2003 Fulbright Award in Environmental Science (Denmark) 2001 Donath Medal: Geological Society of America Young Scientist Award 2001 Geological Society of America Fellow 1997 Georgia Institute of Technology Teaching Fellow Award 1994 Outstanding Graduate Student Instructor Award, UC Berkeley 1992 Fulbright Award in Geology (Norway) 1991 NSF Graduate Fellowship 1991 Chevron Undergraduate Excellence Award

CITATIONS AND H-INDEX (GOOGLE SCHOLAR, ACCESSED 05/27/14) 1727 total number of citations 1050 citations since 2009 22 h-index (all years) 18 h-index (since 2009)

PUBLISHED WORKS (all peer-reviewed: *denotes student, postdoc or technician author) 62. A.H. Jahren, J.N. Bostic* and B.A. Davy. 2014 (Invited Review). The potential for a carbon stable isotope biomarker of dietary sugar intake. Journal of Analytical Atomic Spectrometry, 29(5): 795-816. DOI: 10.1039/jn.113.186213. 61. T.H.I. Fakhouri, A.H. Jahren, L.J. Appel, L. Chen, R. Alavi and C.A.M. Anderson. 2014. Change in serum carbon isotopes in response to change in sugar-sweetened beverage intake. Journal of Nutrition, DOI: 10.3945/C3JA50339A. 60. N.C. Arens, A.H. Jahren and D.C. Kendrick. 2014. Carbon isotope stratigraphy and correlation of plant megafossil localities in the Hell Creek Formation of eastern Montana, USA. Geological Society of America Special Papers, 503: 149-171. Jahren cv, page 2 of 6

59. N.C. Arens, A. Thompson and A.H. Jahren. 2014. A preliminary test of the press-pulse extinction hypothesis: Palynological indicators of vegetation change preceding the Cretaceous-Paleogene boundary, McCone County, Montana, USA. Geological Society of America Special Papers, 503: 209-227. 58. B.A. Schubert* and A.H. Jahren. 2013. Reconciliation of marine and terrestrial carbon isotope excursions based on changing atmospheric CO2 levels. Nature Communications, 4:1653, DOI: 10.1038/ncomms2659. 57. A.H. Jahren, B.A. Schubert*, L. Marynowski and J.P. Wilson*. 2013. The carbon isotope organic geochemistry of Early Ordovician rocks from the Annascaul Formation, County Kerry. Irish Journal of Earth Sciences, 31: 1-12; doi: 10.3318/IJES.2013.31.

56. B.A. Schubert* and A.H. Jahren. 2012. The effect of atmospheric CO2 concentration on carbon isotope fractionation in C3 land plants. Geochimica et Cosmochimica Acta, 96: 29-43. 55. D.C. King*, B.A. Schubert* and A.H. Jahren. 2012. Practical considerations for the use of pollen δ13C value as a paleoclimate indicator. Rapid Communications in Mass Spectrometry, 26: 2165-2172, doi: 10.1002/rcm.6333. 54. B.A. Schubert*, A.H. Jahren, J.J. Eberle, L.S.L. Sternberg, and D.A. Eberth. 2012. A summertime rainy season in the Arctic forests of the Eocene. Geology, 40(6): 523–526, doi: 10.1130/G32856.1. 53. I. Yakovlev, C. G. Fossdal, T. Skrøppa, J. E. Olsen, A.H. Jahren, and Ø. Johnsen, 2012. An adaptive epigenetic memory in conifers with important implications for seed production. Seed Science Research, 14 pages, doi:10.1017/S0960258511000535. 52. A. Cuenca, G. Petersen, O. Seberg, and A.H. Jahren. 2012. Genes and processed paralogs co- exist in plant mitochondria. Journal of Molecular Evolution, 74: 158-169, doi:10.1007/s00239-012-9496-1. 51. W.M. Hagopian*, and A.H. Jahren. 2012. Elimination of nitrogen interference during online oxygen isotope analysis of nitrogen-doped organics using the “NiCat” nickel reduction system. Rapid Communications in Mass Spectrometry, 26: 1776-1782. 50. B.A. Schubert* and A.H. Jahren. 2011. Quantifying seasonal precipitation using high- resolution carbon isotope analyses in evergreen wood. Geochimica et Cosmochimica Acta, 75(22) 7291-7303, doi: 10.1016/j.gca. 2011.08.002. 49. L. Marynowski, M. Rakocinski, E. Borcuch, B. Kremer, B.A. Schubert*, A.H. Jahren. 2011. Molecular and petrographic indicators of redox conditions and bacterial communities after the F/F mass extinction (Kowala, Holy Cross Mountains, Poland). Palaeogeography Palaeoclimatology Palaeoecology, 306, 1-14. 48. R.J. Panetta*, A.H. Jahren. 2011. Single-step transesterification with simultaneous concentration and stable isotope analysis of fatty acid methyl esters by gas chromatography- combustion-isotope ratio mass spectrometry. Rapid Communications in Mass Spectrometry, 25(10) 1372-1381. 47. B.A. Schubert* and A.H. Jahren. 2011. Fertilization trajectory of the root crop Raphanus sativus across atmospheric pCO2 estimates of the next 300 years. Agriculture, Ecosystems, and Environment, 140(1-2) 174-181, doi: 10.1016/j.agee.2010.11.024. 46. B.M. Davy, A.H. Jahren, V.E. Hendrick, D.L. Comber. 2011. Association of δ13C in fingerstick blood with added-sugar and sugar-sweetened beverage Intake. Journal of the American Dietetic Association, 111(6) 874-878. 45. A.H. Jahren and B.A. Schubert*. 2010. Corn content of French fry oil from national chain vs. small business restaurants. Proceedings of the National Academy of Sciences, 107(5), 2099– 2101, doi: 2010.1073/pnas.0914437107. 44. G.B. Hunsinger*, W.M. Hagopian, A.H. Jahren. 2010. Offline Oxygen Isotope Analysis of Organic Compounds with High N:O, Rapid Communications in Mass Spectrometry, 24, 3182- 3186. 43. E.H. Yeung, C.D. Saudek, A.H. Jahren, W.M.L. Kao, M. Islas, R. Kraft*, J. Coresh, and C.A. Anderson. 2010. Evaluation of a novel isotope biomarker for dietary consuption of sweets. American Journal of Epidemiology, doi: 10.1093/aje/kwq247. Jahren cv, page 3 of 6

42. W.M. Hagopian*, and A.H. Jahren. 2010. Minimization of Sample Requirements for δ18O in Benzoic Acid, Rapid Communications in Mass Spectrometry, 24, 2542-2546; doi 10.1002/rcm.4669. 13 41. A.H. Jahren and N.C. Arens. 2009. Prediction of atmospheric δ CO2 using plant cuticle isolated from fluvial sediment: tests across a gradient in salt content. Palaios, 24, 394-401. doi: 10.2110/palo.2008.p08-069r. 40. A.H. Jahren, M.C. Byrne, H.V. Graham*, R.A. Summons and L.S.L. Sternberg. 2009. The environmental water of the Middle Eocene Arctic: Evidence from δD and δ18O within specific compounds. Palaeogeography, Palaeoclimatology, Palaeoecology, 271(1-2), 96-103. doi: 10.1016/j.palaeo.2008.09.016. 39. A.H. Jahren, R.A. Kraft*. 2008. Carbon and nitrogen stable isotopes in fastfood: Signatures of corn and confinement. Proceedings of the National Academy of Sciences, 105(46), 17855- 17860. doi: 10.1073 pnas.0809870105. 38. R.A. Kraft*, A.H. Jahren and C.D. Saudek. 2008. Clinical-scale investigation of stable isotopes in human blood: δ13C and δ15N from 406 patients at the Johns Hopkins Medical Institutions. Rapid Communications in Mass Spectrometry, 22(22), 3683-369. 37. G.J. Retallack and A.H. Jahren. 2008. Methane release from igneous intrusion of coal during Late Permian extinction events. Journal of Geology, 116, 1-20. 36. A.H. Jahren and L.S.L. Sternberg. 2008. Annual patterns within tree rings of the Arctic middle Eocene (~45 Ma): Isotopic signatures of precipitation, relative humidity and deciduousness. Geology, 36(2), 99-102. 35. A.H. Jahren, N.C. Arens and S.A. Harbeson*. 2008 (Invited). Prediction of atmospheric 13 δ CO2 using fossil plant tissues. Reviews of Geophysics, 46/2006RG0002. 34. L.S.L. Sternberg, M.C. Pinzon, P.F. Vendramini, W.T. Anderson, A.H. Jahren and K. Beuning. 2007. Oxygen isotope ratios of cellulose derived phenylglucosazone: An improved paleoclimate indicator of environmental water and relative humidity. Geochimica et Cosmochimica Acta, 71, 2463-2473. 33. A.H. Jahren. 2007 (Invited). The Arctic forest of the middle Eocene. Annual Review of Earth and Planetary Sciences, 35, 509-540. 32. S.P. Werts* and A.H. Jahren. 2007. Estimation of temperatures beneath archaeological campfires using carbon stable isotope composition of soil organic matter. Journal of Archaeological Sciences, 34(6), 850-857. doi:10.1016/j.jas.2006.05.007 31. H.C.W. Skinner and A.H. Jahren. 200X (Revised, 2nd Edition). Biomineralization, in Schlesinger, W.H., ed., Biogeochemistry, Volume 8: Treatise on Geochemistry: Oxford, Elsevier-Pergamon, Chapter 4, Pages 1-69. 30. G.J. Retallack, T.L. Greaver* and A.H. Jahren. 2007. Return to Coalsack Bluff and the Permian-Triassic boundary in Antarctica. Global and Planetary Change, 55, 90-108. 29. A.H. Jahren, C. Saudek, E. Yeung, W.H. Kao, R. Kraft* and B. Caballero. 2006. An isotopic method for quantifying sweeteners derived from corn and sugar cane. American Journal of Clinical Nutrition, 84, 1380-1384. 28. L.S.L. Sternberg, M.C. Pinzon, W.T. Anderson and A.H. Jahren. 2006. Variation in oxygen isotope fractionation during cellulose synthesis: molecular and biosynthetic effects. Plant, Cell and Environment, 29, 1881-1889. 27. A.H. Jahren, K. Kelm, B. Wendland, G. Petersen and O. Seberg. 2006. The carbon stable isotope composition of DNA isolated from an incipient paleosol: Geology, 34(5), 381-384. 26. G.J. Retallack, C.A. Metzger, T.L. Greaver*, A.H. Jahren, R.M.H. Smith and N.D. Sheldon. 2006. Middle-Late Permian mass extinction on land. GSA Bulletin, 118(11), 1398-1411. 25. A.H. Jahren, C.P. Conrad, N.C. Arens, G. Mora* and C. Lithgow-Bertelloni. 2005. A plate tectonic mechanism for methane hydrate release along subduction zones. Earth and Planetary Science Letters, 236, 691-704. 24. G.J. Retallack, A.H. Jahren, N.D. Sheldon*, R. Chakrabarti, C.A. Metzger and R.M.H. Smith. 2005. The Permian-Triassic boundary in Antarctica. Antarctic Science, 17(2), 241-258. Jahren cv, page 4 of 6

23. A.H. Jahren, G. Petersen and O. Seberg. 2004. Plant DNA: A new substrate for carbon stable isotope analysis and a potential paleoenvironmental indicator. Geology, 32(3), 241-244. 22. A.H. Jahren. 2004. The carbon stable isotope composition of pollen. Review of Palaeobotany and Palynology, 132(3-4), 291-313. 21. A.H. Jahren, B.A. LePage and S.P. Werts*. 2004. Methanogenesis in Eocene Arctic soils inferred from δ13C of tree fossil carbonates. Palaeogeography, Palaeoclimatology, Palaeoecology, 214, 347-358. 20. A.H. Jahren. 2004. Factors of soil formation: Biota, in Hillel, D., Rosenzweig, C., Powlson, D., Scow, K., Singer, M., and Sparks, D., eds., Encyclopedia of Soils in the Environment: New York, Academic Press, p. 507-512. 19. A.H. Jahren and L.S.L. Sternberg. 2003. Paleohumidity estimates for the Eocene arctic rainforest. Geology, 31(5), 463-466. 18. A.H. Jahren, S. Porter* and J. Kuglitsch. 2003. Lichen metabolism identified in Early Devonian terrestrial organisms. Geology, 31(2), 99-102. 17. G. Mora* and A.H. Jahren. 2003. Isotopic evidence for the role of plant development on transpiration in deciduous forests of the southern United States. Global Biogeochemical Cycles, 17(2), 2002GB001981. 16. A.H. Jahren. 2002. The biogeochemical consequences of the mid-Cretaceous superplume. Journal of Geodynamics, 34, 177-191. 15. A.H. Jahren and K.L. Sanford*. 2002. Groundwater is the ultimate source of the Salt Creek Pupfish Habitat, Death Valley, U.S.A., Journal of Arid Environments, 51(3), 401-411. 14. N.C. Arens and A.H. Jahren. 2002. Chemostratigraphic correlation of four fossil-bearing sections in southwestern North Dakota. in Hartman, J.H., Johnson, K.R., and Nichols, D.J. eds., The Hell Creek Formation and the Cretaceous-Tertiary boundary in the northern Great Plains: An integrated record of the end of the Cretaceous: Boulder, Colorado, Geological Society of America Special Paper, 361, 75-93. 13. A.H. Jahren and L.S.L. Sternberg. 2002. Eocene meridional weather patterns reflected in the oxygen isotopes of Arctic fossil wood. GSA Today, 12(1), 4-9. 12. A.H. Jahren, R. Amundson, C. Kendall and P. Wigand. 2001. Paleoclimatic reconstruction using the correlation in δ18O of hackberry carbonate and environmental water, North America. Quaternary Research, 56(2), 252-263. 11. A.H. Jahren, N.C. Arens, G. Sarmiento, J. Guerrero and R. Amundson. 2001. Terrestrial record of methane hydrate dissociation in the Early Cretaceous. Geology, 29(2), 159-162. 10. N.C. Arens, A.H. Jahren and R. Amundson. 2000. Can C3 plants faithfully record the carbon isotopic composition of atmospheric carbon dioxide? Paleobiology, 26(1), 137-164.

9. N.C. Arens and A.H. Jahren. 2000. Carbon isotopic excursion in atmospheric CO2 at the Cretaceous-Tertiary boundary: Evidence from terrestrial sediments. Palaios, 15(4), 314-322. 8. C.A. Gadbury, L.C. Todd, A.H. Jahren and R. Amundson. 2000. Spatial and temporal variations in the isotopic composition of bison tooth enamel from the Early Holocene Hudson-Meng Bone Bed, Nebraska. Palaeogeography, Palaeoclimatology and Palaeoecology, 157, 79-93. 7. A.H. Jahren, M.L. Gabel and R. Amundson. 1998. Biomineralization in seeds: developmental trends in isotopic signatures of hackberry. Palaeogeography, Palaeoclimatology and Palaeoecology, 138:359-269. 6. A.H. Jahren, L.C. Todd, and R. Amundson. 1998. Stable isotope dietary analysis of bison bone samples from the Hudson-Meng bonebed: effects of paleotopography. Journal of Archaeological Science, 25, 465-475. 5. M. Coltorti, G. Ficcarelli, A.H. Jahren, M. Moreno-Espinosa, L. Rook and D. Torre. 1998. The last occurrence of Pleistocene megafauna in the Ecuadorian Andes. Journal of South American Earth Science, 11(6), 581-586. Jahren cv, page 5 of 6

4. R. Amundson, A.H. Jahren, R. Everett and J. Bartolome. 1997. Stable carbon isotope compositions of Paoceae pollen and its potential in paleovegetational reconstructions. Review of Paleobotany and Palynology, 99, 17-24. 3. Y. Wang, A.H. Jahren and R. Amundson. 1997. Biogenic carbonate in Hackberry (Celtis) endocarps: potential for 14C dating. Quaternary Research, 47, 337-343. 1. M.R. Cowan, M.L. Gabel, A.H. Jahren and L.L. Tieszen. 1997. Growth and biomineralization of Celtis occidentalis (Ulmaceae) pericarps. American Midland Naturalist, 137, 266-273. 2. A.H. Jahren, N. Toth, K. Shick, J.D. Clark, and R. Amundson. 1997. Distinguishing the nature of tool residue: chemical and morphological analysis of bamboo and bone tool residues. Journal of Archaeological Science, 24(3), 245-250. 1. A.H. Jahren, M.B. Kruger, and R. Jeanloz. 1992. Alexandrite as a high- temperature pressure calibrant, and implications for the ruby-fluorescence scale. Journal of Applied Physics, 71, 1579-1582. ARTICLES FOR THE POPULAR PRESS A.H. Jahren. 2007 (Invited). Geologists weigh in on diet and disease. Geotimes, May 2007, pages 30-32. A.H. Jahren and 5 others. 2011. Otherworldly Earths: The Future of Deep Time Research. EOS, Volume 92, Number 7 (15 February 2011). CURRENT FUNDING $ 0.9 M in total external funds to A.H. Jahren (2014 active contracts only) FUNDING AGENCIES: The Department of Energy (DOE), The National Science Foundation (NSF), The National Institutes of Health (NIH)

MAJOR FUNDING NIH (NIDDK): “δ13C Added Sugar Intake Biomarker: Determining Validity in Children” 2014- 2016 (subcontracted to VaTech P.I. B. Davy) $61,750 to Jahren DOE Division of Geosciences (BES): “Fundamental Research on the Fractionation of Carbon Isotopes during Photosynthesis” 2014-2016 (no Co-P.I.) $405,000 to Jahren NSF Division of Sedimentary Geology and Paleontology: “Paleoclimate Analysis of a Miocene Arctic Forest from the Kolyma River Basin, Northeastern Russia” 2013-2015 (Co-P.I. B. Schubert) $170,000 to Jahren NIH (NIDDK): “SIPsmarter” 2011-2016 (subcontracted to VaTech P.I. J. Zoellner) $230,402 to Jahren DOE Division of Geosciences (BES): “Development of the Carbon Isotope Signature of

Terrestrial n-alkanes as a Potential Proxy for Palaeo-pCO2” 2010-2013 (no Co-P.I.) $599,338 to Jahren NSF (OS/MRI): “Acquisition of IRMS Instruments for Stable Isotope Analyses of New Geobiological Substrates” 2010-2013 (Co-P.I. B. Popp) $716,368 to Jahren NSF Division of Arctic Sciences: “Collaborative Research: Transarctic Paleoclimate of the Eocene” 2008-2012 (Co-P.I.s J. Eberle, L. Sternberg and R. Summons) $350,677 to Jahren NSF (EXE): “Method Development for Stable Isotope Characterization of High Explosives” 2007-2010 (no Co-P.I.) $397,198 to Jahren DOE Division of Geosciences (BES): “Development of New Biomarkers for Surficial Earth Processes” 2006-2009 (no Co-P.I.) $313,595 to Jahren The Seaver Institute: “Exploring the Link Between High Fructose Corn Syrup (HFCS) and Type 2 Diabetes: A Novel Approach Using Stable Carbon Isotopes” 2007 (no Co-P.I.) $20,000 to Jahren Center for a Livable Future (CLF) Innovation Grant: “High Fructose Corn Syrup Levels in Blood: The Development of a Biochemical Assay for the Consumption of High Fructose Corn Syrup Archived in Blood Plasma” (no Co-P.I.) $18,321 to Jahren NSF Geobiology (EAR): “SGER: Carbon Isotope Fractionation by Fungal Microorganisms” 2006-2007 (no Co-P.I.) $23,000 to Jahren Jahren cv, page 6 of 6

NSF Division of Arctic Sciences: “Environmental Fluctuations during the Arctic Eocene Growing Season: Stable Isotope Analyses of Plant Fossils from Axel Heiberg Island” 2003-2006 (Co- P.I.s L. Sternberg and R. Summons) $154,257 to Jahren NSF Division of Antarctic Geology and Geophysics: “Permian-Triassic Mass Extinction in Antarctica” 2003-2005 (Co-P.I. G. Retallack) $84,226 to Jahren Andrew W. Mellon Foundation: “Quantifying Forest Productivity over a Uniquely Short Growing Season” 2002-2003 (no Co-P.I.) $150,000 to Jahren NSF Geology and Paleontology (EAR): “Carbon Isotope Composition of Aptian Plant Fossils from the Arundel Formation, Western Maryland” 2001-2002 (no Co-P.I.) $72,315 to Jahren NSF Division of Environmental Biology: “Amount, Rate and δ13C of Soil Organic Matter Production by Armadillidium vulgare” 2001-2002 (Co-P.I. K. Szlavecz) $60,000 to Jahren Andrew W. Mellon Foundation: “Composition, Structure, Dynamics, Productivity and Climate of Eocene Forests of the Canadian High Arctic” 1999-2001 (no Co-P.I.) $183,000 to Jahren ACS/Petroleum Research Fund: “Carbon Isotopic Record of the Atmosphere Across the K-T Boundary Inferred from the Carbon Isotope Composition of Petroleum Source-Rocks.” 1998- 2000 (no Co-P.I.) $20,000 to Jahren TEACHING: Graduate Courses: GG711 Terrestrial Geobiology (Lecture with Lab Exercises) 2008 – 2009; 2011, U of Hawaii 270.624 Stable Isotope Techniques (Lecture and Lab) Spring ; 2000 – 2002; 2007 – 2008, Johns Hopkins EAS 8103B Earth System Chemistry (Lecture and Field course) Fall 1999, Georgia Tech EAS 6625A Stable Isotope Geochemistry (Lecture course) Spring 1997 and 1998, Georgia Tech Undergraduate Courses: GG102 Introduction to Global Change (Lecture) 2012 – present, U of Hawaii GG101 The Dynamic Earth (Lecture) Fall 2009 and Spring 2010, U of Hawaii GG101L The Dynamic Earth (Laboratory) Fall 2011, U of Hawaii 270.222 Earth Materials (Lecture, Lab and Field course) Fall 2001 through Fall 2006, Johns Hopkins 270.424 Geobiology (Lecture, Lab and Field course) Fall 1999 – 2002; 2006 – 2007 Johns Hopkins 270.109 Exploring Earth's History through Fossils (Field course) Fall 2001, 2002 and Spring 2006, Johns Hopkins 270.120 The Extinction of the Dinosaurs (Lecture course) Fall 2004 and Spring 2005, Johns Hopkins EAS 4803 Scientific Analysis of Environmental Change (Lecture course), Winter 1998 and 1999, Georgia Tech EAS 4802A Soil Biogeochemistry (Lecture, Lab and Field course) Spring 1997, Georgia Tech EAS 2501A Geology 1 (Lecture and Lab course) Fall 1996, Georgia Tech Student Evaluations: Overall Course Rating = 4.64 out of 5.00 (average rating for 6 courses taught at Johns Hopkins)

PROFESSIONAL SERVICE: Organizer, Goldschmidt Conference (Biogeochemistry Theme) Member, Board of Directors, STEPPE – Geological Society of America Editor, GSA Bulletin (2010-present) Associate Editor, GSA Bulletin (2006-2009) Editorial Board, Geochemical Transactions (2005-2009) Editorial Board, Geology (2003-2006) Secretary, AGU Biogeosciences Section (2010-2014) Selection Committee, AGU Fellows (2008-2010), AGU Union Medals and Awards (2012-present) Selection Committee, GSA Young Investigator Award (2004-2007), GSA Student Research Grants (2006-2008) Invited Participant, NSF Deep Time Earth-Life Observatories Workshop, Washington, DC (April 2010) Invited Participant, National Academy of Sciences Kavli Frontiers Conference, Irvine, CA (October 2008) Advisory Board, Department of Geology and Geophysics, University of Minnesota (2006 and 2007) Memberships: Geological Society of America, American Geophysical Union Reviewer/Panelist, Numerous Journals/Agencies including Nature, Science, Geology, Geochimica Cosmochimica et Acta and NSF, DOE, USDA, EPA.