Richard P. Fiorella

Modeling and Observations of Earth Systems Group
Earth and Environmental Sciences Division, Los Alamos National Laboratory
rfiorella@lanl.gov  ·  ORCID: 0000-0002-0824-4777  ·  Google Scholar
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Education

2016Ph.D., Geology, University of Michigan - Ann Arbor
Thesis advisor: Christopher J. Poulsen
2012M.S., Earth and Environmental Sciences, University of Michigan - Ann Arbor
2009B.S., Chemistry, University of Pittsburgh
B.A., Environmental Studies, University of Pittsburgh

Professional Positions

2023–Scientist 2, Los Alamos National Laboratory
2026–Joint Appointment, University of Michigan
2023–2026Research Scientist, New Mexico Consortium
2021–2025Adjunct Assistant Professor, Geology and Geophysics, University of Utah
2021–2023Director's Postdoctoral Fellow, Los Alamos National Laboratory
2019–2021Faculty Fellow, Global Change and Sustainability Center, University of Utah
2019–2021Research Assistant Professor, Geology and Geophysics, University of Utah
2018–2019Postdoctoral Scholar, Biology, University of Utah
2016–2018Postdoctoral Scholar, Geology and Geophysics, University of Utah

Submitted / In Review

  1. Still, C.J., Hawkins, L., Rastogi, B., Diehl, J., Arroyo-Vargas, P., Daly, C., Doolittle, C., Fiorella, R.P., Hammond, B., Hanson, C., Harrington, C., Helbig, M., Jones, K., Lamanna, J., Mekonnen, Z., Page, G., Richardson, A., Riley, W.J., Rupp, D., Segura, C., Talberth, J., Telg, H., Vierra, B., Woodruff, D., Holz, A., Sibley, A., Schulze, M., and Beedlow P. (2026). Impacts of Extreme Heat: Tree and Forest Responses to the 2021 Pacific Northwest Heat Wave. Submitted to Nature on 2026-07-09.
  2. Velez-Pardo, M., Noone, D.C., and Fiorella, R.P. (2026). Global Isotopic Footprint in Urban Atmospheric Water Vapor. Submitted to Nature Communications on 2026-07-08.
  3. Dillard, S.L., Marin-Spiotta, E., Andresen, C.G., Thomas, L., Thaler, E., Conroy, N., Renner, C., Santos, F., Breen, A.L., Fiorella, R.P., Bennett, K.E. (2026). Repeated fire increases soil pyrogenic carbon storage in Alaskan Tundra. Submitted to Permafrost and Periglacial Processes on 2026-04-29.
  4. Chen, H., Good, S.P., Caylor, K.K., Fiorella, R.P., Haagsma, M., Wang, L. (2025). Methodological Divergence Drives Systematic Uncertainty in Transpiration Flux in Highly Vegetated Biomes. Submitted to Nature Ecology & Evolution on 2025-12-01.
  5. Yang, D., Hantson, W., Brown, C., Murphy, B.A., Dillard, S.L., Zhu, X., Santos, F., Tao, J., Di Domenico, N., Tas, N., Dafflon, B., Bennett, K.E., Fiorella, R.P., Lara, M.J., Mekonnen, Z.A., Griffiths, N.A., Farley, M., Orndahl, K., Kim, J.E., Hoy, E., Wang, J., Frost, G.V., Riley, W., Ely, K.S., Berner, L.T., Breen, A., Collins, A., Euskirchen, E., Fisher, J.B., Goetz, S.J., Giuntoni, A., Hayes, D., Kumar, J., Massoud, E., Macander, M., Miller, C.E., Montesano, P., Myers-Smith, I.H., Rixen, C., Rogers, A., Rogers, B.M., Romanovsky, V., Serbin, S., Trotter, C., Watts, J., Wang, C., Bolton, W.R., and Iversen, C.M. (2025). Sources of Vegetation Heterogeneity in Arctic Tundra and Implications for Earth System Feedbacks. Submitted to New Phytologist on 2025-10-29.

Peer-Reviewed Publications

  1. Dütsch, M., Fairall, C.W., Blossey, P.N., and Fiorella, R.P. (2026). A new theoretical framework for parameterizing nonequilibrium fractionation during evaporation from the ocean Journal of Advances in Modeling Earth Systems, v. 18(3) doi: 10.1029/2025MS005229
  2. Chen, H., Good, S.P., Caylor, K.K., Fiorella, R.P., Wang, L. (2026). A hybrid Penman-Monteith and machine learning model for simulating evapotranspiration and its components Journal of Hydrology, v. 668 doi: 10.1016/j.jhydrol.2026.134985
  3. Chen, H., Good, S.P., Zahn, E., Bou-Zeid, E., Caylor, K., Fiorella, R.P., Haagsma, M., and Wang, L. (2026). Shifts in evapotranspiration components during heatwaves alter surface cooling Earth's Future, v. 14(2) doi: 10.1029/2025EF006562
  4. Bhattacharya, T., Fastovich, D., Maupin, C.R., Thompson, A.E., Feng, R., McClymont, E.L., Bong, H., Legrande, A.N., Dee, S., and Fiorella, R.P. (2026). Leaf wax hydrogen isotope ratios reflect storm track position over western North America Paleoceanography and Paleoclimatology, v. 41(4) doi: 10.1029/2025PA005342
  5. Bong, H., LeGrande, A. N., Dee, S., Zhu, J., Cauquoin, A., Ding, Q., Fiorella, R.P., Dutrievoz, N., Tanoue, M., Frazer, M., Sarkar, M., Agosta, C., Yoshimura, K., Werner, M., Okazaki, A., Risi, C., Steen-Larsen, H. C., Casado, M., Wahl, S., Nusbaumer, J., Worden, J., Good, S., Bailey, A., Schneider, M., Noël, S., Mandal, S., Bowman, K., Li, Y., Schmidt, G. A. (2026). Water Isotope Model Intercomparison Project (WisoMIP): Present-day Climate Journal of Geophysical Research: Atmospheres, v. 131(3) doi: 10.1029/2025JD044985
  6. Huang, X., Zhang, Y., Gao, B., Abolt, C.J., Crumley, R.L., Demir, C., Fiorella, R.P., Busey, B., Bolton, B., Painter, S.L., and Bennett, K.E. (2026). Runoff evaluation in an Earth System Land Surface Model for Permafrost Regions Geoscientific Model Development, v. 19(3) doi: 10.5194/gmd-19-1193-2026
  7. Siler, N., Fiorella, R.P., and Kukla, T. (2025). A unified interpretation of variability in precipitation isotope ratios Journal of Climate, v. 38(6) doi: 10.1175/JCLI-D-4-0427.1
  8. Atkins, J., Aho, K., Chen, X., Elmore, A., Fiorella, R.P., Luo, W., Lombardozzi, D., Lunch, C., Manak, L., de Pablo, L.X., Myers-Pigg, A., Record, S., Qiu, T., Reed, S., Ruddell, B., Strange, B., Torrens, C., Yule, K., Richardson, A. (2025). Recommendations for developing, documenting, and distributing data products derived from NEON data Ecosphere, v. 16(1) doi: 10.1002/ecs2.70159
  9. Haagsma, M., Finkenbiner, C.E., Noone, D.C., Bowen, G.J., Still, C., Fiorella, R.P., Good, S.P. (2024). Using an isotope-enabled mass balance to evaluate existing land surface models Water Resources Research, v. 60(12) doi: 10.1029/2024WR037530
  10. Carlo, A.D., Sterling, R.A., Mao, J., Fiorella, R.P., Fortney, J.C., Unützer, J., and Wong, E.S. (2023). Characteristics of Veterans with Depression who use the Veterans Choice Program of the Veterans Health Administration Psychiatric Services, v. 75(4) doi: 10.1176/appi.ps.202100731
  11. Li, B., Good, S.P., Fiorella, R.P., Finkenbiner, C.E., Bowen, G.J., Noone, D.C., Still, C.J., and Anderegg, W.R.L. (2023). Stable isotopes contain substantial additive information about terrestrial carbon and water cycling. Environmental Research Letters, v. 18, 094065 doi: 10.1088/1748-9326/acf4ab
  12. Hawkins, L.R., Bassouni, M., Anderegg, W.R.L., Venturas, M., Good, S.P., Kwon, H., Hanson, C., Fiorella, R.P., Bowen, G.J., and Still, C.J. (2022). Comparing model representations of physiological limits on transpiration at a semi-arid ponderosa pine site Journal of Advances in Modeling Earth Systems, doi: 10.1029/2021MS002927
  13. Finkenbiner, C.E., Li, B., Spencer, L., Fiorella, R.P., Allen, S.T., Good, S.P., Bowen, G.J., and Still, C.J. (2022). The NEON Daily Isotopic Composition of Environmental Exchanges Dataset Scientific Data, v. 9, 353. doi: 10.1038/s41597-022-01412-4
  14. Fiorella, R.P., Kannenberg, S.A., Anderegg, W.R.L., Monson, R.K., and Ehleringer, J.R. (2022). Heterogeneous isotope effects decouple conifer leaf and phloem sugar $\delta^{13}$C and $\delta^{18}$O. Oecologia, v. 198, p. 357-370 doi: 10.1007/s00442-022-05121-y
  15. Aron, P.G., Poulsen, C.J., Fiorella, R.P., Levin, N.E., Acosta, R.P., Yanites, B.J., and Cassel, E.J. (2021). Variability and Controls on $\delta^{18}$O, d-excess, and ∆'$^{17}$O in Southern Peruvian Precipitation. Journal of Geophysical Research: Atmospheres, v. 126(23). doi: 10.1029/2020JD034009
  16. Fiorella, R.P., Siler, N., Nusbaumer, J., and Noone, D.C. (2021). Enhancing understanding of the hydrological cycle via pairing of process-oriented and isotope ratio tracers. Journal of Advances in Modeling Earth Systems, v. 13(10) doi: 10.1029/2021MS002648
  17. Follstad Shah, J.J., Bares, R., Bowen, B.B., Bowen, G.J., Bowling, D.R., Eiriksson, D.P., Fasoli, B., Fiorella, R.P., Hallar, A.G., Horel, J.D., Hinners, S.J., Jacques, A.A., Jamison, L.R., Lin, J.C., Mendoza, D.L., Mitchell, L.E., Pataki, D.E., Skiles, S.M., Smith, R.M., Wolf, M.A., and Brooks, P.D. (2021). The Wasatch Environmental Observatory: A mountain-to-urban research network in the semi-arid Western US. Hydrogical Processes, v. 35(9) doi: 10.1002/hyp.14352
  18. Fiorella, R.P., Good, S.P., Allen, S.T., Guo, J.S., Noone, D.C., Anderegg, W.R.L., Florian, C.R., Luo, H., Pingintha-Durden, N., and Bowen, G.J. (2021). Macroscale Patterns in Calinbrated NEON Atmospheric Carbon Isotope Observations Journal of Geophysical Research: Biogeosciences, v. 126(3) doi: 10.1029/2020JG005862
  19. Kannenberg, S.A., Fiorella, R.P., Anderegg, W.R.L., Monson, R.K., and Ehleringer, J.R. (2021). Seasonal and diurnal trends in progressive isotope enrichment along needles in two pine species Plant, Cell, and Environment, v. 44(1), p. 143-155 doi: 10.1111/pce.13915
  20. Finkenbiner, C.E., Good, S.P., Allen, S.T. Fiorella, R.P., and Bowen, G.J. (2021). A Statistical Method for the Temporal Downscaling of Geochemical Tracer Datasets Journal of Hydrometeorology, v. 22(6), p. 1473-1486. doi: 10.1175/JHM-D-20-0142.1
  21. Aron, P.G., Poulsen, C.J., Fiorella, R.P., Matheny, A.M., and Veverica, T.J. (2020). An Isotopic Approach to Quantify Transpiration in a Mixed Deciduous Forest Ecohydrology, v. 13(6) doi: 10.1002/eco.2229
  22. Fiorella, R.P., Bares, R., Lin, J.C., and Bowen, G.J. (2019). Wintertime decoupling of urban valley and rural ridge water vapor revealed through stable water isotopes Atmospheric Environment, v. 213, p. 337-348 doi: 10.1016/j.atmosenv.2019.06.022
  23. Aron, P.G., Poulsen, C.J., Fiorella, R.P., and Matheny, A.M. (2019). Stable Water Isotopes Reveal Effects of Intermediate Disturbance and Canopy Structure on Forest Water Cycling Journal of Geophysical Research: Biogeosciences, v. 124(10). doi: 10.1029/2019JG005118
  24. Putman, A.L., Fiorella, R.P., Cai, Z., and Bowen G.J. (2019). A Global Perspective on Local Meteoric Water Lines: Meta-analytic Insight into Fundamental Controls and Practical Constraints Water Resources Research, v. 55(8) doi: 10.1029/2019WR025181
  25. Fiorella, R.P., West, J.B., and Bowen G.J. (2019). Biased estimates of the isotope ratios of steady-state evaporation from the assumption of equilibrium between vapor and precipitation. Hydrogical Processes, v. 33, p. 2576-2590 doi: 10.1002/hyp.13531
  26. Bowen, G.J., Cai, Z., Fiorella, R.P., and Putman, A.L. (2019). Isotopes in the Water Cycle: Regional- to Global-Scale Patterns and Applications Annual Reviews in Earth and Planetary Sciences, v. 47, p. 453-479 doi: 10.1146/annurev-earth-053018-060220
  27. Jameel, Y., Brewer, S., Fiorella, R.P., Tipple, B.J., Terry, S., and Bowen, G.J. (2018). Isotopic reconnaissance of urban water supply system dynamics. Hydrology and Earth System Science, v. 22, p. 6109-6125 doi: 10.5194/hess-22-6109-2018
  28. Fiorella, R.P., Poulsen, C.J., and Matheny A.M. (2018). Seasonal patterns of water cycling in a deep, continental mountain valley inferred from stable water vapor isotopes Journal of Geophysical Research: Atmospheres, v. 123(14), p. 7271-7291 doi: 10.1029/2017JD028093
  29. Fiorella, R.P., Bares, R., Lin, J.C., Ehleringer, J.R., and Bowen, G.J. (2018). Detection and variability of combustion-derived vapor in an urban basin. Atmospheric Chemistry and Physics, 18(12), P. 8529-8547 doi: 10.5194/acp-18-8529-2018
  30. Fiorella, R.P. and Sheldon, N.D. (2017). Equable end Mesoproterozoic climate in the absence of high CO$_2$ Geology, v. 45(3), p. 231-234 doi: 10.1130/G38682.1
  31. Skinner, C.B., Poulsen, C.J., Chadwick, R., Diffenbaugh, N.S., and Fiorella, R.P. (2017). The role of plant CO$_2$ physiological forcing in shaping future daily-scale precipitation. Journal of Climate, v. 30(7), p. 2319-2340 doi: 10.1175/JCLI-D-16-0603.1
  32. Matheny, A.M., Fiorella, R.P., Bohrer, G., Poulsen, C.J., Morin, T.H., Wunderlich, A., Vogel, C.S., and Curtis, P.S. (2016). Contrasting strategies of hydraulic control in two co-dominant temperate tree species Ecohydrology, e1815 doi: 10.1002/eco.1815
  33. Fiorella, R.P., Poulsen, C.J., Pillco Zolá, R.S., Jeffery, M.L., and Ehlers, T.A. (2015). Modern and long-term evaporation of central Andes surface waters suggests paleo archives underestimate Neogene elevations Earth and Planetary Science Letters, 432, p. 59-72 doi: 10.1016/j.epsl.2015.09.045
  34. Fiorella, R.P., Poulsen, C.J., Pillco Zolá, R.S., Barnes, J.B., Tabor, C.R., and Ehlers, T.A. (2015). Spatiotemporal variabliity of modern precipitation $\delta^{18}$O in the central Andes and Implications for Paleoclimate and Paleoaltimetry Estimates. Journal of Geophysical Research: Atmospheres, 120(10), p. 4630-4656 doi: 10.1002/2014JD022893
  35. Fiorella, R.P. and Poulsen, C.J. (2013). Dehumidification over tropical continents reduces climate sensitivity and inhibits snowball Earth initiation Journal of Climate, 26, p. 9677-9695. doi: 10.1175/JCLI-D-12-00820.1
  36. An, J., Fiorella, R.P., Geib, S.J., and Rosi, N.L. (2009). Synthesis, structure, assembly, and modulation of the CO$_2$ adsorption properties of a zinc-adeninate macrocycle. Journal of the American Chemical Society, 131(4), p. 8401-8403 doi: 10.1021/ja901869m

Commentaries

  1. Bowen, G.J. and Fiorella, R.P. (2021). Water emissions put a damper on the coal-to-gas transition Proceedings of the National Academy of Sciences, v. 118(5), e2024360118 doi: 10.1073/pnas.2024360118

Conference Presentations

  1. Dütsch, M., Fairall, C.W., Blossey, P.N., and Fiorella, R.P. (2025). A new theoretical framework for parameterizing nonequilibrium fractionation during evaporation from the ocean. American Geophysical Union Annual Meeting. December 15-19, New Orleans, LA.
  2. Moy, C.K., Solander, K.C., Crumley, R.C., and Fiorella, R.P. (2025). Forecasting Alaskan River Temperature to Assess Salmon Viability. American Geophysical Union Annual Meeting. December 15-19, New Orleans, LA.
  3. Velez-Pardo, M., Noone, D.C., and Fiorella, R.P. (2025). A Robust Urban Signal in Atmospheric Water Vapor. American Meteorological Society Annual Meeting. January 25-29, 2026, Houston, TX.
  4. Still, C.J., Hawkins, L.R., Vierra, B., Jones, K., Helbig, M., Fiorella, R.P., and Rastogi, B. (2025). Resilience and recovery from an extreme heat wave: the role of canopy structure and stature. American Geophysical Union Annual Meeting. December 15-19, New Orleans, LA.
  5. Chen, H., Good, S.P., Matos, K., Allen, S.T., Cayor, K., Fiorella, R.P., and Wang, L. (2025). A Systematic Review of Five Evapotranspiration Partitioning Methods Across NEON Sites. American Geophysical Union Annual Meeting. December 15-19, New Orleans, LA.
  6. Kukla, T., Fiorella, R.P., and Siler, N. (2025). The limits of modeling water isotopes from moisture convergence alone. American Geophysical Union Annual Meeting. December 15-19, New Orleans, LA.
  7. Bong, H., LeGrande, A.N., Dee, S., Zhu, J., Cauquoin, A., Fiorella, R.P., Ding, Q., Dutrievoz, N., Tanoue, M., Frazer, M., Sarkar, M., Agosta, C., Yoshimura, K., Werner, M., Okazaki, A., Risi, C., Steen-Larsen, H.C., Casado, M., Wahl, S., Nusbaumer, J., Worden, J., Good, S., Bailey, A., Schneider, M., Noël, S., Mandal, S., Bowman, K., Li, Y., and Schmidt, G.A. (2025). Stable Water Isotope Intercomparison Group Phase 3: Present-day Climate. American Geophysical Union Annual Meeting. December 15-19, New Orleans, LA.
  8. Bennett, K.E., Bachand, C.L., Fiorella, R.P., Trotter, C.W., Crumley, R.L., Wang, C., Dafflon, B., Sulman, B.N., Thornton, P.E., Iversen, C.M. (2024). Improved snow distribution for the Arctic. International Conference on Arctic Research Planning. March 20-28, Boulder, CO.
  9. Coon, E.T., Gao, B., Schwenk, J., Cooper, M.G., Zhou, T., Fiorella, R.P., Rathore, S.S., Beisman, J.J., Hetland, R., Moulton, J.D., and Painter, S.L. (2024). Purpose-built modeling to inform climate impact mitigation. American Geophysical Union Fall Meeting. December 9-13, Washington, D.C..
  10. Zhang, Y., Huang, X., Abolt, C.J., Painter, S.L., Bennett, K.E., Fiorella, R.P. (2024). Evaluation of Earth System Model Representation of Subsurface Thermal Dynamics of Arctic Landscapes: Insight from an Intermodel Comparison at a Column Scale. American Geophysical Union Fall Meeting. December 9-13, Washington, D.C..
  11. Bennett, K.E., Bachand, C.L., Fiorella, R.P., Trotter, C.W., Crumley, R.L., Sulman, B.N., Thornton, P.E., Iversen, C.M. (2024). Improved subgrid snow distribution in the E3SM land model for the Arctic. American Geophysical Union Fall Meeting. December 9-13, Washington, D.C..
  12. Velez-Pardo, M., Collins, C., Noone, D.C., and Fiorella, R.P. (2024). Using water isotope ratios in models and observations to improve mechanistic understanding of coastal urban hydroclimate. Case study of Houston, TX. American Geophysical Union Fall Meeting. December 9-13, Washington, D.C..
  13. Fiorella, R.P., Noone, D.C., Siler, N., Kukla, T., Velez-Pardo, M., Macarewich, S., and Nusbaumer, J. (2024). Linking water isotope ratios to water cycle changes using process-oriented numerical tracers. American Geophysical Union Fall Meeting. December 9-13, Washington, D.C..
  14. Chen, H., Good, S.P., Zahn, E., Bou-Zeid, E., Caylor, K., Fiorella, R.P., Wang, L. (2024). Observed decline in transpiration and its fractional contribution to evapotranspiration during heatwaves. American Geophysical Union Fall Meeting. December 9-13, Washington, D.C..
  15. Fiorella, R.P., Chen, H., Good, S.P., Wang, L., Caylor, K., Zahn, E., and Bou-Zeid, E. (2024). Comparing observational constraints on T/ET from NEON sites to the CMIP6 ensemble. American Geophysical Union Fall Meeting. December 9-13, Washington, D.C..
  16. Macarewich, S., Welker, J., Zhu, J., Nusbaumer, J., Herrington, A., Fiorella, R.P.,Dar, S.S., Otto-Bliesner, B.L., Brady, E.C. (2024). Investigating Controls on the Isotopic Composition of Precipitation in the Continental United States using Numerical Tracers in the Community Earth System Model. American Geophysical Union Fall Meeting. December 9-13, Washington, D.C..
  17. Record, S., Malone, S., Albert, S., Aston, I., Balch, J.K., Balk, M., Betts, M.G., Blanchard, J.L., Crimmins, T., Dietze, M., Eichenwald, A.J., Eloe-Fadrosh, E.A., Fiorella, R.P., Hensley, R., Hudson, A., Jirniec, V., Knott, J., LaDeau, S.L., Luther, D., Mabee, P., Marshall, M., Petruzza, S., Richardson, A.D., Rodriguez, J.M., Rubenstein, D., Serbin, S.P., Shepard, I., Sokol, E.R., Thoms, J.C., and Wall, C.C. (2024). Ten simple rules to promote FAIR and Open Science When Reusing Data from Ecological Research Networks. Ecological Society of America Annual Meeting. August 4-9, Long Beach, CA.
  18. Kukla, T., Siler, N., Fiorella, R.P., Laguë, M., Rugenstein, J.K.C, and Swann, A.L.S. (2023). Large isotopic signals in tropical precipitation require non-local hydrologic change.. American Geophysical Union Fall Meeting. December 11-15, San Francisco, CA.
  19. Bachand, C., Bennett, K., Fiorella, R.P., and Crumley, R. (2023). Improving E3SM's Representation of Snow in the Arctic.. American Geophysical Union Fall Meeting. December 11-15, San Francisco, CA.
  20. Dütsch, M., Fairall, C.W., Blossey, P.N., and Fiorella, R.P. (2023). A new theoretical framework for parameterizing nonequilibrium fractionation during evaporation from the ocean.. European Geophysical Union Annual Assembly. April 23-28, Vienna, AT.
  21. Henze, D., Noone, D., de Szoeke, S.P., Fiorella, R.P., Blossey, P.N., and Bailey, A.R. (2022). Vertical structure of turbulence and fluxes across cloud mesoscale organizations from the WP-3D Orion Aircraft during ATOMIC.. American Geophysical Union Fall Meeting. December 12-16, Chicago, IL.
  22. Hawkins, L.R., Good, S.P., Fickle, J.C., Anderegg, W.R.L., Jarecke, C.M., Fiorella, R.P., Noone, D.C., Bowen, G.J., Selker, J.S., and Still, C.J. (2022). The importance of soil hydraulic functions in regulating ecosystem drought stress responses in land process models.. Frontiers in Hydrology Meeting. June 19-24, San Juan, PR.
  23. Good, S.P., Finkenbiner, C.E., Li, B., Fiorella, R.P., Allen, S.T., Noone, D.C., Still, C.J., Anderegg, W.R.L., and Bowen, G.J. (2022). Hydrologic insights from NEON stable isotope observations. Frontiers in Hydrology Meeting. June 19-24, San Juan, PR.
  24. Hawkins, L.R., Still, C.J., Bassouni, M., Anderegg, W.R.L., Riley, W.J., Lawrence, D.M., Mekonnen, Z.A., Fiorella, R.P., Good, S.P., Bowen, G.J. (2021). Metrics, Measurements, and Methods for Advancing Ecosystem Model Evaluation. American Geophysical Union Fall Meeting. December 13-17, New Orleans, LA.
  25. Finkenbiner, C.E., Good, S.P., Li, B., Fiorella, R.P., Allen, S.T., Bowen, G.J., Still, C.J., and Noone, D.C. (2021). Evaluation of Land Surface Model Evapotranspiration Partitioning using NEON Water Isotope Datasets across the United States.. American Geophysical Union Fall Meeting. December 13-17, New Orleans, LA.
  26. Siler, N., Fiorella, R.P., and Noone, D.C. (2021). A Unified Theory of Variability in Precipitation Isotope Ratios. American Geophysical Union Fall Meeting. December 13-17, New Orleans, LA.
  27. Allen, S.T., Fiorella, R.P., Guo, J.S., Good, S.P., Austin, P.L., Hawkins, L.R., Finkenbiner, C.E., Noone, D.C., Still, C.J., Anderegg, W.R.L., and Bowen, G.J. (2021). Evapotranspiration partitioning and root water sources in a sagebrush shrubland.. American Geophysical Union Fall Meeting. December 13-17, New Orleans, LA.
  28. Li, B., Good, S.P., Finkenbiner, C.E., Fiorella, R.P., Bowen, G.J., Still, C.J., Noone, D.C., and Anderegg, W.R.L. (2021). Stable isotopes contain unique additive information about carbon and water cycles in arid enviromnents.. American Geophysical Union Fall Meeting. December 13-17, New Orleans, LA.
  29. Guo, J.S., Allen, S.T., Fiorella, R.P., Still, C.J., Anderegg, W.R.L., and Bowen, G.J. (2020). Vertical partitioning of root distributions correlated with ecophysiological characteristics: Initial results from NEON megapit data. American Geophysical Union Fall Meeting. December 1-17, virtual.
  30. Fiorella, R.P., Guo, J.S., Good, S.P., Allen, S.T., Anderegg, W.R.L., Finkenbiner, C., Hawkins, L.R., Noone, D., Still, C.J., and Bowen, G.J. (2020). Calibration strategies for NEON carbon and water vapor isotope observations and cross-network patterns.. Ecological Society of America Annual Meeting. August 3-6, virtual.
  31. Fiorella, R.P., Kannenberg, S.A., Anderegg, W.R.L., Ehleringer, J.R., and Monson, R.K. (2019). A string-of-lakes in Ponderosa Pine needles: progressive leaf water and organic matter oxygen isotope enrichment and implications for tree-ring reconstructions.. American Geophysical Union Fall Meeting. December 9-13, San Francisco, CA.
  32. Allen, S.T., Fiorella, R.P., Guo, J.S., Good, S.P., Noone, D.C., Anderegg, W.R.L., and Bowen, G.J. (2019). Canopy interception losses of rainfall in North American biomes.. American Geophysical Union Fall Meeting. December 9-13, San Francisco, CA.
  33. Fiorella, R.P., Allen, S.T., Guo, J., Anderegg, W.R.L., Good, S.P., Noone, D.C., Still, C.J., West, J.B., and Bowen, G.J. (2019). Evaluating the assumption of equilibrium between precipitation and vapor using data and models.. US CLIVAR Water Isotopes and Climate Workshop.. October 1-3., Boulder, CO.
  34. Allen, S.T., Fiorella, R.P., Guo, J.S., Good, S.P., Noone, D.C., Anderegg, W.R.L., and Bowen, G.J. (2019). Accounting for interception loss in evapotranspiration partitioning. US CLIVAR Water Isotopes and Climate Workshop.. October 1-3., Boulder, CO.
  35. Fiorella, R.P., Anderegg, W.R.L., Good, S.P., Noone, D.C., Still, C.J., and Bowen, G.J. (2019). Developing a continental-scale theory for predicting ecosystem transpiration with NEON flux tower measurements. European Geophysical Union Annual Assembly. April 10-14, Vienna, AT.
  36. Fiorella, R.P., West, J.B., Putman, A.L., Cai, Z., and Bowen, G.J. (2018). Spatial patterns of bias during steady-state evaporation from the assumption of equilibrium between vapor and precipitation. American Geophysical Union Fall Meeting. December 10-14, Washington, D.C..
  37. Putman, A.L., Fiorella, R.P., Cai, Z., and Bowen, G.J. (2018). A global perspective on local meteoric water lines: Metanalytic insight into fundamental controls and practical constraints. American Geophysical Union Fall Meeting. December 10-14, Washington, D.C..
  38. Fiorella, R.P., Bares, R., Lin, J.C., Strong, C., and Bowen, G.J. (2017). Variability in the combustion-derived fraction of urban humidity during Salt Lake City winter estimated from stable water vapor isotopes and its relationship to atmospheric stability and inversion structure. American Geophysical Union Fall Meeting. December 11-15, New Orleans, LA.
  39. Jameel, Y., Brewer, S., Fiorella, R.P., Tipple, B.J., Bowen, G.J., and Terry, S. (2017). Estimates of water source contributions in a dynamic urban water supply system inferred via a Bayesian stable isotope mixing model.. American Geophysical Union Fall Meeting. December 11-15, New Orleans, LA.
  40. Fiorella, R.P., Hyland, E.G., and Sheldon, N.D. (2017). Reconciling Divergent Carbon Isotope Responses in Ocean and Terrestrial Proxy Records to Constrain Causal Mechanisms for the Early Eocene Climatic Optimum. Climate and Biotic Events of the Paleogene 2017. September 3-7, Alta, UT.
  41. Fiorella, R.P., Noone, D.C., Frank, J., Williams, D.G., Johnson, J.E., and Bowen, G.J. (2017). Scaling point observations of water vapor isotope compositions to understand regional hydrologic cycling.. Integrated Carbon and Water Ecological and Biogeochemical Synthesis. February 27-28, Stevenson, WA.
  42. Fiorella, R.P., Poulsen, C.J., Matheny, A.M., Sanchez, C.R., Fotis, A.T., Morin, T.H., Vogel, C.S., Gough, C.M., Aron, P., Bohrer, G. (2016). Responses to an Intermediate Disturbance Revealed Through Stable Water Vapor Isotopes. American Geophysical Union Fall Meeting. December 12-16., San Francisco, CA.
  43. Aron, P., Poulsen, C.J., and Fiorella, R.P. (2016). A direct measurement of the stable isotopes of transpired water vapor in a northern Michigan forest.. American Geophysical Union Fall Meeting. December 12-16., San Francisco, CA.
  44. Sheldon, N.D., Fiorella, R.P., and Mitchell, R.L. (2016). O$_2$, CH$_4$, and sustained Mesoproterozoic climate equability.. American Geophysical Union Fall Meeting. December 12-16., San Francisco, CA.
  45. Matheny, A.M., Bohrer, G., Fiorella, R.P., and Mirfenderesgi, G. (2016). Plant hydraulic traits govern forest water use and growth. European Geophysical Union Annual Assembly. April 17-22, Vienna, AT.
  46. Fiorella, R.P., Matheny, A.M., Poulsen, C.J., and Bohrer, G. (2015). Constraints on water cycling in a deep mountain valley from stable water isotope and sap flux measurements. American Geophysical Union Fall Meeting. December 14-18, San Francisco, CA.
  47. Matheny, A.M., Bohrer, G., Fiorella, R.P., and Mirfenderesgi, G. (2015). Proposed hydrodynamic model improves resolution of species-specific responses to drought and disturbance.. American Geophysical Union Fall Meeting. December 14-18, San Francisco, CA.
  48. Sheldon, N.D., Fiorella, R.P., and Domagal-Goldman, S. (2015). A terrestrial perspective on Archean and Proterozoic habitability on Earth. Astrobiology Science Conference, Abstract \#7546. June 15-19, Chicago, IL.
  49. Poulsen, C.J., Feng, R., and Fiorella, R.P. (2014). The Role of Topography on Continental Water Cycling and Water Stable Isotope Compositions over Geological Time Scales. American Geophysical Union Fall Meeting. December 15-19, San Francisco, CA.
  50. Fiorella, R.P., Poulsen, C.J., Pillco Zolá, R.S., Jeffery, M.L., and Ehlers, T.A. (2014). Incorporating evaporation histories into paleoaltimetry reconstructions: an Andean case-study.. Geological Society of America Annual Meeting. October 19-22, Vancouver, CA.
  51. Hyland, E.G., Fiorella, R.P., and Sheldon, N.D. (2014). Reexamining causal mechanisms for the Early Eocene Climatic Optimum.. Geological Society of America Annual Meeting. October 19-22, Vancouver, CA.
  52. Sheldon, N.D. and Fiorella, R.P. (2014). Mesoproterozoic Climate equability in the absence of high CO$_2$.. Goldschmidt Conference. June 8-13, Sacramento, CA.
  53. Fiorella, R.P. and Poulsen, C.J. (2013). Paleogeographic controls on climate sensitivity and feedback strength and their impacts on snowball Earth initiation.. American Geophysical Union Fall Meeting. December 9-13, San Francisco, CA.
  54. Poulsen, C.J. and Fiorella, R.P. (2013). Climate sensitivity in the pre-Cenozoic World. Pre-Cenozoic Climate Workshop. June 17-19, Toulouse, FR.
  55. Fiorella, R.P., Poulsen, C.J., Ehlers, T.A., Jeffery, M.L., and Pillco Zolá, R.S. (2012). Exceptional isotopic variability in stream waters of the central Andes: large scale or local controls?. American Geophysical Union Fall Meeting. December 3-7, San Francisco, CA.
  56. Link, P., Goldner, A., Whadcoat, S., and Fiorella, R.P. (2012). Variability of oceanic and terrestrial water vapor sources in the Amazon Basin: An investigation using TES satellite and MERRA reanalysis at varying temporal resolutions. American Geophysical Union Chapman Conference on Remote Sensing of the Terrestrial Water Cycle. February 19-22, Kona, HI.
  57. Fiorella, R.P., Poulsen, C.J., Jablonowski, C., and Bitz, C.M. (2011). Resistance to Snowball Earth Initiation in the CAM3.1 Slab Ocean Model. American Geophysical Union Fall Meeting. December 5-9, San Francisco, CA.