Google Scholar
~~~~~~~~~ Peer-Reviewed Publications ~~~~~~~~~
16 in process) Karancz, S., Uchikawa, J., de Nooijer, L., Wolthers, M., Conner, K., Hite, C., Zeebe, R., Sharma, S., & Reichart, G.-J. (submitted) Constraining sulfur incorporation in calcite using controlled growth experiments. submitted to Geochimica et Cosmochimica Acta.
15 in process) Branson, O., Uchikawa, J., Bohlin, M., & Misra, S. (in revision) Controls on Li partitioning and isotopic fractionation in inorganic calcite. submitted to Geochimica et Cosmochimica Acta.
14) Uchikawa, J., Penman, D.E., Harper, D.T., Farmer, J.R., Zachos, J.C., Planavsky, N.J., & Zeebe, R.E. (2023) Sulfate and phosphate oxyanions alter B/Ca and d11B in inorganic calcite at constant pH: Crystallographic controls outweigh normal kinetic effects. Geochimica et Cosmochimica Acta, v343, 353-370 {Web Link}
13) Uchikawa, J., Chen, S., Eiler, J.M., Adkins, J.F., & Zeebe, R.E. (2021) Trajectory and timescale of oxygen and clumped isotope equilibration in the dissolved carbonate system under normal and enzymatically-catalyzed conditions at 25 C. Geochimica et Cosmochimica Acta, v314, 313-333. {Web Link}
{Download ExClump38 Model}
12) Yumol, L., Uchikawa, J., & Zeebe, R.E. (2020) Kinetic isotope effects during CO2 hydration:
Experimental results for carbon and oxygen fractionation. Geochimica et Cosmochimica Acta. v279, 189-203 {Web Link}
11) Farmer, J., Branson, O., Uchikawa, J., Penman, D.E., Hönisch, B., & Zeebe, R.E. (2019) Boric acid
and borate incorporation in inorganic calcite inferred from B/Ca, boron isotopes and surface kinetic modeling. Geochimica et Cosmochimica Acta, v244, 229-247. {Web Link}
Ranked in the top 25 most-downloaded articles for the journal from January to March 2019
10) Uchikawa, J., Harper, D.T., Penman, D.E., Zachos, J.C., & Zeebe, R.E. (2017) Influence of solution chemistry on the boron content in inorganic calcite grown in artificial seawater. Geochimica et Cosmochimica Acta, v218, 291-307. {PDF Download}
9) Farmer, J.R., Hönisch, B., & Uchikawa, J. (2016) Single laboratory comparison of MC-ICP-MS and N-TIMS boron isotope analyses in marine carbonates. Chemical Geology, v447, 173-182. {Web Link}
8) Tripati A.K., Hill P.S., Eagle R.A., Mosenfelder J.L., Tang J., Schauble E.A., Eiler J.M., Zeebe R.E., Uchikawa J., Coplen T.B., Ries J.B., & Henry D. (2015) Beyond temperature: Clumped-isotope signatures in dissolved inorganic carbon species and the influence of solution chemistry on carbonate mineral composition. Geochimica et Cosmochimica Acta, v166, 344-371. {Web Link}
Ranked in the top 25 most-downloaded articles for the journal from September to December 2015
7) Uchikawa J., Penman D.E., Zachos J.C., & Zeebe R.E. (2015) Experimental evidence for kinetic effects on B/Ca in synthetic calcite: Implications for potential B(OH)4- and B(OH)3 incorporation. Geochimica et Cosmochimica Acta, v150, 171-191. {PDF Download}
Ranked in the top 25 most-downloaded articles for the journal from February to April 2015
6) Uchikawa J., & Zeebe R.E. (2013) No discernible effect of Mg2+ ions on the equilibrium oxygen isotope fractionation in the CO2-H2O system. Chemical Geology, v343, 1-11. {PDF Download}
5) Uchikawa J., & Zeebe R.E. (2012) The effect of carbonic anhydrase on the kinetics and equilibrium of the oxygen isotope exchange in the CO2-H2O system: Implications for δ18O vital effects in biogenic carbonates. Geochimica et Cosmochimica Acta, v95, 15-34. {PDF Download}
4) Uchikawa J., Popp B.N., Schoonmaker J.E., Timmermann A., & Lorenz S.J. (2010) Geochemical and climate modeling evidence of Holocene aridification in Hawaii: Dynamic response to a weakening equatorial cold tongue. Quaternary Science Reviews, v29, 3057-3066. {PDF Download}
3) Uchikawa J., & Zeebe R.E. (2010) Examining possible effects of seawater pH decline on foraminiferal stable isotopes during the Paleocene-Eocene Thermal Maximum. Paleoceanography and Paleoclimatology, 25, PA2216, doi: 10.1029/2009PA001864. {PDF Download}
2) Uchikawa J., & Zeebe R.E. (2008) Influence of terrestrial weathering on ocean acidification and the next glacial inception. Geophysical Research Letters, 35, L23608, doi: 10.1029/2008GL035963. {PDF Download}
1) Uchikawa J., Popp B.N., Schoonmaker J.E., & Xu L. (2008) Direct application of compound-specific radiocarbon analysis of leaf waxes to establish lacustrine sediment chronology. Journal of Paleolimnology, v39, 43-60. {PDF Download}
~~~~~~~~~ Peer-Reviewed Publications ~~~~~~~~~
16 in process) Karancz, S., Uchikawa, J., de Nooijer, L., Wolthers, M., Conner, K., Hite, C., Zeebe, R., Sharma, S., & Reichart, G.-J. (submitted) Constraining sulfur incorporation in calcite using controlled growth experiments. submitted to Geochimica et Cosmochimica Acta.
15 in process) Branson, O., Uchikawa, J., Bohlin, M., & Misra, S. (in revision) Controls on Li partitioning and isotopic fractionation in inorganic calcite. submitted to Geochimica et Cosmochimica Acta.
14) Uchikawa, J., Penman, D.E., Harper, D.T., Farmer, J.R., Zachos, J.C., Planavsky, N.J., & Zeebe, R.E. (2023) Sulfate and phosphate oxyanions alter B/Ca and d11B in inorganic calcite at constant pH: Crystallographic controls outweigh normal kinetic effects. Geochimica et Cosmochimica Acta, v343, 353-370 {Web Link}
13) Uchikawa, J., Chen, S., Eiler, J.M., Adkins, J.F., & Zeebe, R.E. (2021) Trajectory and timescale of oxygen and clumped isotope equilibration in the dissolved carbonate system under normal and enzymatically-catalyzed conditions at 25 C. Geochimica et Cosmochimica Acta, v314, 313-333. {Web Link}
{Download ExClump38 Model}
12) Yumol, L., Uchikawa, J., & Zeebe, R.E. (2020) Kinetic isotope effects during CO2 hydration:
Experimental results for carbon and oxygen fractionation. Geochimica et Cosmochimica Acta. v279, 189-203 {Web Link}
11) Farmer, J., Branson, O., Uchikawa, J., Penman, D.E., Hönisch, B., & Zeebe, R.E. (2019) Boric acid
and borate incorporation in inorganic calcite inferred from B/Ca, boron isotopes and surface kinetic modeling. Geochimica et Cosmochimica Acta, v244, 229-247. {Web Link}
Ranked in the top 25 most-downloaded articles for the journal from January to March 2019
10) Uchikawa, J., Harper, D.T., Penman, D.E., Zachos, J.C., & Zeebe, R.E. (2017) Influence of solution chemistry on the boron content in inorganic calcite grown in artificial seawater. Geochimica et Cosmochimica Acta, v218, 291-307. {PDF Download}
9) Farmer, J.R., Hönisch, B., & Uchikawa, J. (2016) Single laboratory comparison of MC-ICP-MS and N-TIMS boron isotope analyses in marine carbonates. Chemical Geology, v447, 173-182. {Web Link}
8) Tripati A.K., Hill P.S., Eagle R.A., Mosenfelder J.L., Tang J., Schauble E.A., Eiler J.M., Zeebe R.E., Uchikawa J., Coplen T.B., Ries J.B., & Henry D. (2015) Beyond temperature: Clumped-isotope signatures in dissolved inorganic carbon species and the influence of solution chemistry on carbonate mineral composition. Geochimica et Cosmochimica Acta, v166, 344-371. {Web Link}
Ranked in the top 25 most-downloaded articles for the journal from September to December 2015
7) Uchikawa J., Penman D.E., Zachos J.C., & Zeebe R.E. (2015) Experimental evidence for kinetic effects on B/Ca in synthetic calcite: Implications for potential B(OH)4- and B(OH)3 incorporation. Geochimica et Cosmochimica Acta, v150, 171-191. {PDF Download}
Ranked in the top 25 most-downloaded articles for the journal from February to April 2015
6) Uchikawa J., & Zeebe R.E. (2013) No discernible effect of Mg2+ ions on the equilibrium oxygen isotope fractionation in the CO2-H2O system. Chemical Geology, v343, 1-11. {PDF Download}
5) Uchikawa J., & Zeebe R.E. (2012) The effect of carbonic anhydrase on the kinetics and equilibrium of the oxygen isotope exchange in the CO2-H2O system: Implications for δ18O vital effects in biogenic carbonates. Geochimica et Cosmochimica Acta, v95, 15-34. {PDF Download}
4) Uchikawa J., Popp B.N., Schoonmaker J.E., Timmermann A., & Lorenz S.J. (2010) Geochemical and climate modeling evidence of Holocene aridification in Hawaii: Dynamic response to a weakening equatorial cold tongue. Quaternary Science Reviews, v29, 3057-3066. {PDF Download}
3) Uchikawa J., & Zeebe R.E. (2010) Examining possible effects of seawater pH decline on foraminiferal stable isotopes during the Paleocene-Eocene Thermal Maximum. Paleoceanography and Paleoclimatology, 25, PA2216, doi: 10.1029/2009PA001864. {PDF Download}
2) Uchikawa J., & Zeebe R.E. (2008) Influence of terrestrial weathering on ocean acidification and the next glacial inception. Geophysical Research Letters, 35, L23608, doi: 10.1029/2008GL035963. {PDF Download}
1) Uchikawa J., Popp B.N., Schoonmaker J.E., & Xu L. (2008) Direct application of compound-specific radiocarbon analysis of leaf waxes to establish lacustrine sediment chronology. Journal of Paleolimnology, v39, 43-60. {PDF Download}
~~~~~~~~~ Conference Presentations ~~~~~~~~~
* As a presenter
Karancz, S., Uchikawa, J., de Nooijer, L., Wolthers, M., Conner, K., Hite, C., Brummer, G.-J., Lattaud, J., Haghipour, N., Rosenthal, Y., Zeebe, R., Sharma, S., & Reichard, G.-J. (2024) Sulfur incorporation in (foraminiferal) calcite. EGU General Assembly, Vienna Austria [ ]
Conner, K., Uchikawa, J., DeCarlo, T., Dera, P., Hawco, N., Sharma, S., & Zeebe, R. (2023) Seawater ion incorporation effects on abiogenic calcite crystallography: implications for Raman-based geochemical proxies. AGU Fall Meeting, San Francisco [Poster].
Uchikawa, J.*, Penman, D.E., Harper, D.T., Farmer, J.R., Zahchos, J.C., PLanavsky, N.J., & Zeebe, R.E. (2023) Solution chemical compositions modulate elemental uptake in calcite: Potential implications for paleo-proxy calibrations. Goldschmidt Conference, Lyon [Invited Talk].
Karancz, S., Uchikawa, J., de Nooijer, L.J., Conner, K., Zeebe, R.E., & Reichart, G.-J. (2023) Constraining sulfur incorporation in calcite using controlled growth experiments. Goldschmidt Conference, Lyon [Oral].
Hite, C., Uchikawa, J., Misra, S., Tanwar, N., & Zeebe, R.E. (2022) Lithium isotope and elemental partitioning in inorganic calcite and aragonite. Goldschmidt Conference, Honolulu [Poster].
Uchikawa, J.*, Cheng, S., Eiler, J., Adkins, J., & Zeebe, R.E. (2019) Trajectory and timescale of D47 equilibration in the HCO3-/CO3= pool under normal and enzymatically catalyzed conditions. Goldschmidt Conference, Barcelona [Poster].
Branson, O., Uchikawa, J., Bohlin, M., & Misra, S. (2019) Controls on Li partitioning and isotopic fractionation in inorganic calcite. Goldschmidt Conference, Barcelona. [Oral].
Marchitto, T.M., Gaetani, G.A., Uchikawa, J., & Zeebe, R.E. (2018) Abiotic experimental constraints on the aragonite Li/Mg thermometer. AGU Fall Meeting, Washington D.C. [Oral].
Uchikawa, J.*, Harper, D.T., Zachos, J.C., & Zeebe, R.E. (2018) Oxyanion controls on boron incorporation into inorganic calcite. Goldschmidt Conference, Boston [Oral].
Farmer, J.R., Uchikawa, J., Branson, O., Penman, D.E., Hönisch, B., Zeebe, R.E., & Zachos, J.C. (2017) Paired B/Ca and δ11B measurements on inorganic calcite: Constraints on boron incorporation and implications for boron proxies. Goldschmidt Conference, Paris France [Oral].
Uchikawa, J.*, Penman, D.E., Harper, D.T., Zachos, J.C., & Zeebe, R.E. (2016) Exploring the chemical controls on boron incorporation in synthetic calcite. Goldschmidt Conference, Yokohama Japan [Oral].
Uchikawa, J.*, Penman, D.E., Harper, D.T., Farmer, J., Zachos, J.C., Hönisch, B., & Zeebe, R.E. (2015) Towards better understanding of B/Ca and δ11B proxies: A synthesis of currently available data from inorganic calcite precipitation experiments. AGU Fall Meeting, San Francisco [Poster].
Farmer, J., Uchikawa, J., Penman, D.E., Hönisch, B., & Zeebe, R.E. (2015) Outside the pH box: Boron isotopes in synthetic calcite precipitated under varying solution chemistry. AGU Fall Meeting, San Francisco [Oral].
Uchikawa, J.*, Penman, D.E., Zachos, J.C., & Zeebe, R.E. (2014) Kinetic effects on B/Ca in synthetic calcite: Implications for B(OH)4- and B(OH)3 incorporation. AGU Fall Meeting, San Francisco [Oral].
Hönisch, B., Haynes, L.L., Penman, D.E., Ridgwell, A., Uchikawa, J., Zachos, J.C., & Zeebe, R.E. (2014) Estimating ocean acidification in the geologic record. GeoFrankfurt 2014, Frankfurt Germany.
Uchikawa, J.*, Zeebe, R.E., Penman, D.E., & Zachos, J.C. (2013) Understanding the thermodynamic basis of the B/Ca paleo-pH proxy based on controlled inorganic precipitation experiments. AGU Fall Meeting, San Francisco [Poster].
Tripati, A.K., Hill, P.S., Eagle, R.A., Schauble, E.A., Zeebe, R.E., & Uchikawa, J. (2013) 13C-18O bond ordering and 18O/16O ratios in dissolved inorganic carbon species and their potential to be preserved in the solid phase. AGU Fall Meeting, San Francisco [Poster]
Uchikawa, J.*, & Zeebe, R.E. (2011) An experimental study on the effect of carbonic anhydrase on the oxygen isotope exchange kinetics and equilibrium in the carbonic acid system. AGU Fall Meeting, San Francisco [Poster].
Uchikawa, J.*, Zeebe, R.E., Vennemann, T., & Spero, H.J. (2010) The acid fractionation factor for BaCO3: Implication for paleo-proxy validation. AGU Fall Meeting, San Francisco [Poster]
Uchikawa, J.*, & Zeebe, R.E. (2010) Effect of magnesium ions on the stable isotope equilibrium between the dissolved inorganic carbon species and water. EGU General Assembly, Vienna Austria [Poster]
Uchikawa, J.*, & Zeebe, R.E. (2009) Effect of pH decline on foraminiferal stable isotopes during the Paleocene-Eocene Thermal Maximum? AGU Fall Meeting, San Francisco [Poster]
Uchikawa, J. *, & Zeebe, R.E. (2008) Influence of terrestrial weathering on future ocean acidification. AGU Fall Meeting, San Francisco [Poster]
Uchikawa, J. *, Popp, B.N., Schoonmaker, J.E., & Xu, L. (2005) Application of accelerator mass spectrometry (AMS) radiocarbon dating of sediments using plant waxes in a tropical pond in Hawaii. ASLO Aquatic Sciences Meeting, Salt Lake City [Poster]
Schoonmaker, J.E., Garrison, H., Uchikawa, J.*, & Glenn, C. (2003) Holocene record of seasonality in a tropical pond, Oahu, Hawaii. GSA Annual Meeting, Seattle [Oral]
Schoonmaker, J.E., Garrison, H., & Uchikawa, J.* (2002) Nutrient dynamics in a highly productive coastal pond, Oahu, Hawaii. 6th International Symposium on the Geochemistry of the Earth's Surface, Honolulu [Poster]