Leadership & Staff Yui Takeshita Scientist [javascript protected email address] Curriculum Vitae Yui received his PhD in Oceanography from the University of California, San Diego. Yui’s main research interests are to develop and apply autonomous sensing technology to observe marine biogeochemical cycles in situ. Most recently, Yui was a Postdoctoral Researcher at the Carnegie Institution for Science, Department of Global Ecology, at Stanford. Yui has received several honors, including the Excellence in Partnership Award from the National Oceanographic Partnership Program (NOPP), the University of California San Diego Directors Fellowship, and the undergraduate academic honor cum laude.
Long, J.S., Y. Takeshita, J. Plant, N. Buzby, A.J. Fassbender, and K.S. Johnson. 2024. Seasonal biases in fluorescence-estimated chlorophyll-a derived from biogeochemical profiling floats. Communications Earth & Environment, 5(1): 1–8. https://doi.org/10.1038/s43247-024-01762-4
Wirth, T., Y. Takeshita, B. Davis, E. Park, I. Hu, C. L. Huffard, K. S. Johnson, D. Nicholson, C. Staudinger, J. K. Warren, and T. Martz. 2024. Assessment of a pH optode for oceanographic moored and profiling applications. Limnology and Oceanography: Methods, 22(11): 805-822. https://doi.org/10.1002/lom3.10646
Carranza, M.M., M.C. Long, A. Di Luca, A.J. Fassbender, K.S. Johnson, Y. Takeshita, P. Mongue, and K.E. Turner. 2024. Extratropical storms induce carbon outgassing over the Southern Ocean. Npj Climate and Atmospheric Science, 7(1): 1–16. https://doi.org/10.1038/s41612-024-00657-7
Carter, B. R., J. D. Sharp, A. G. Dickson, M. Álvarez, M. B. Fong, M. I. García-Ibáñez, R. J. Woosley, Y. Takeshita, L. Barbero, R. H. Byrne, J. Cai, M. Chierici, S. L. Clegg, R. A. Easley, A. J. Fassbender, K. L. Fleger, X. Li, M. Martín-Mayor, K. M. Schockman, and Z.A. Wang. 2024. Uncertainty sources for measurable ocean carbonate chemistry variables. Limnology and Oceanography, 69(1):1–21. https://doi.org/10.1002/lno.12477
Johnson, K.S., J.N. Plant, T.L. Maurer, and Y. Takeshita. 2023. BGC-Argo quality control manual for pH. https://doi.org/10.13155/97828
Pezner, A. K., T.A. Courtney, H.C. Barkley, W. Chou, H. Chu, S.M. Clements, T. Cyronak, M.D. DeGrandpre, S.A. Kekuewa, D.I. Kline, Y. Liang, T.R. Martz, S. Mitarai, H.N. Page, M.S. Rintoul, J.E. Smith, K. Soong, Y. Takeshita, M. Tresguerres, Y. Wei, K.K. Yates, and A.J. Andersson. 2023. Increasing hypoxia on global coral reefs under ocean warming. Nature Climate Change, 13(4): 403–409. https://doi.org/10.1038/s41558-023-01619-2
Kroeker, K.J., E.M. Donham, K. Vylet, J.K. Warren, J. Cheresh, J. Fiechter, J. Freiwald, and Y. Takeshita. 2023. Exposure to extremes in multiple global change drivers: Characterizing pH, dissolved oxygen, and temperature variability in a dynamic, upwelling dominated ecosystem. Limnology and Oceanography, 68(7): 1611–1623. https://doi.org/10.1002/lno.12371
Johnson, K.S, J.N. Plant, T.L. Maurer, and Y. Takeshita. 2023. Processing BGC-Argo pH data at the DAC level. Argo Data Management. https://doi.org/10.13155/57195
Stoer, A. C., Y. Takeshita, T. L. Maurer, C. Begouen Demeaux, H. C. Bittig, E. Boss, H. Claustre, C. Gordon, B.J. Greenan, K. S. Johnson, E. Organelli, R. Sauzède, C. M. Schmechtig, and K. Fennel. 2023. A census of quality-controlled Biogeochemical-Argo float measurements. Frontiers in Marine Science, 10. https://doi.org/10.3389/fmars.2023.1233289
Donham, E. M., I. Flores, A. Hooper, E. O’Brien, K. Vylet, Y. Takeshita, J. Freiwald, and K. J. Kroeker. 2023. Population-specific vulnerability to ocean change in a multistressor environment. Science Advances, 9(3). https://doi.org/10.1126/sciadv.ade2365
Toy, J.A., K.J. Kroeker, C.A. Logan,Y. Takeshita, G.C. Longo, and G. Bernardi. 2022. Upwelling-level acidification and pH/pCO2 variability moderate effects of ocean acidification on brain gene expression in the temperate surfperch, Embiotoca jacksoni. Molecular Ecology, 31(18): 4707–4725. https://doi.org/10.1111/mec.16611
Takeshita, Y., K.L. Mertz, A. Norgaard, S. Gray, M.H. Verburg, and E.E. Bockmon. 2022. Accurate spectrophotometric pH measurements made directly in the sample bottle using an aggregated dye perturbation approach. Limnology and Oceanography Methods, 20(5): 1–7. https://doi.org/10.1002/lom3.10486
García-Ibáñez, M.I., Y. Takeshita, E.F. Guallart, N.M. Fajar, D. Pierrot, F.F. Pérez, W.J. Cai, and M. Álvarez. 2022. Gaining insights into the seawater carbonate system using discrete fCO2 measurements. Marine Chemistry, 245(104150): 1–10. https://doi.org/10.1016/j.marchem.2022.104150
Johnson, K.S., M.R. Mazloff, M.B. Bif, Y. Takeshita, H.W. Jannasch, T.L. Maurer, J.N. Plant, A. Verdy, P.M. Walz, S.C. Riser, and L.D. Talley. 2022. Carbon to nitrogen uptake ratios observed across the Southern Ocean by the SOCCOM profiling float array. JGR Oceans, 127(9): 1–16. https://doi.org/10.1029/2022jc018859
Ricart, A. M., M. Ward, T. Hill, E. Sanford, K. Kroeker, Y. Takeshita, S. Merolla, P. Shukla, A.T. Ninokawa, K. Elsmore, and B. Gaylord. 2022. Commentary: Overstated potential for seagrass meadows to mitigate coastal ocean acidification, Frontiers in Marine Science, 9(884857): 1–4. https://doi.org/10.3389/fmars.2022.884857
Evans, W., G.T. Lebon, C.D. Harrington, Y. Takeshita, and A. Bidlack. 2022. Marine CO2 system variability along the northeast Pacific Inside Passage determined from an Alaskan ferry. Biogeosciences, 19: 1277–1301. https://doi.org/10.5194/bg-19-1277-2022
Traiger, S.B., B. Cohn, D. Panos, M. Daly, H.K. Hirsh, M. Martone, I. Gutierrez, D.A. Mucciarone, Y. Takeshita, S.G. Monismith, R.B. Dunbar, and K.J. Nickols. 2022. Limited biogeochemical modification of surface waters by kelp forest canopies: Influence of kelp metabolism and site-specific hydrodynamics. Limnology and Oceanography, 67: 392–403. https://doi.org/10.1002/lno.11999
Nickford, S., J.B. Palter, K. Donohue, A.J. Fassbender, A.R. Gray, J. Long, A.J. Sutton, N.R. Bates, and Y. Takeshita. 2022. Autonomous wintertime observations of air-sea exchange in the Gulf Stream reveal a perfect storm for ocean CO2 uptake. Geophysical Research Letters, 49(5): 1–9. https://doi.org/10.1029/2021GL096805
Griffin, A.J., A. Anderson, J. Ballard, N.R. Bates, R. Garley, R. Jonson, T.R. Martz, F. Pacheco, Y. Takeshita, and A.J. Andersson. 2022. Seasonal changes in seawater calcium and alkalinity in the Sargasso Sea and across the Bermuda carbonate platform. Marine Chemistry, 238(104064). https://doi.org/10.1016/j.marchem.2021.104064
Mucciarone, D.A., H.B. DeJong, R.B. Dunbar, Y. Takeshita, R. Albright, and K. Mertz. 2021. Autonomous submersible multiport water sampler. HardwareX, 9(e00197). https://doi.org/10.1016/j.ohx.2021.e00197
De Orte, R. D.A. Koweek, T. Cyronak, Y. Takeshita, A. Griffin, K. Wolfe, A. Szmant, R. Whitehead, R. Albright, and K. Caldeira. 2021. Unexpected role of communities colonizing dead coral substrate in the calcification of coral reefs. Limnology and Oceanography, 66(5): 1793–1803. https://doi.org/10.1002/lno.11722
Ricart, M., M. Ward, T.M. Hill, E. Sanford, K.J. Kroeker, Y. Takeshita, S. Merolla, P. Shukla, A.T. Ninokawa, K. Elsmore, and B. Gaylord. 2021. Coast‐wide evidence of low pH amelioration by seagrass ecosystems. Global Change Biology 27(11): 2580–2591. https://doi.org/10.1111/gcb.15594
Bresnahan, J., Y. Takeshita, T. Wirth, T.R. Martz, T. Cyronak, R. Albright, K. Wolfe, J.K. Warren, and K. Mertz. 2021. Autonomous in situ calibration of ion‐sensitive field effect transistor pH sensors. Limnology and Oceanography: Methods, 19(2): 132–144. https://doi.org/10.1002/lom3.10410
Carter, B.R., H.C. Bittig, A.J. Fassbender, J.D. Sharp, Y. Takeshita, Y. Xu, M. Alvarez, R. Wanninkhof, R.A. Feely, and L. Barbero. 2021. New and updated global empirical seawater property estimation routines. Limnology and Oceanography: Methods, 19(12): 785–809. https://doi.org/10.1002/lom3.10461
Takeshita, Y., J.K. Warren, X. Liu, R.S. Spaulding, R.H. Byrne, B.R. Carter, M.D. DeGrandpre, A. Murata, and S. Watanabe. 2021. Consistency and stability of purified meta-cresol purple for spectrophotometric pH measurements in seawater. Marine Chemistry, 236: 1–10. https://doi.org/10.1016/j.marchem.2021.104018
Roemmich, D., L. Talley, N. Zilberman, E. Osborne, K.S. Johnson, L. Barbero, H.C. Bittig, N. Briggs, A.J. Fassbender, G.C. Johnson, B.A. King, E. McDonagh, S. Purkey, S. Riser, T. Suga, Y. Takeshita, V. Thierry, and S. Wijffels. 2021. The Technological, Scientific, and Sociological Revolution of Global Subsurface Ocean Observing. Oceanography, 34: 2–8. https://doi.org/10.5670/oceanog.2021.supplement.02-02
Takeshita, Y., B.D. Jones, K.S. Johnson, F.P. Chavez, D.L. Rudnick, M. Blum, K. Conner, S. Jensen, J.S. Long, T. Maughan, K.L. Mertz, J.T. Sherman, and J.K. Warren. 2021. Accurate pH and O2 measurements from Spray underwater gliders. Journal of Atmospheric and Oceanic Technology, 38: 181–195. https://doi.org/10.1175/JTECH-D-20-0095.1
Wolfe, W.H., K.M. Shipley, P.J. Bresnahan, Y. Takeshita, T. Wirth, and T.R. Martz. 2021. Technical note: Stability of tris pH buffer in artificial seawater stored in bags. Ocean Science, 17: 819–831. https://doi.org/10.5194/os-17-819-2021
Cyronak, T., Y. Takeshita, T.A. Courtney, E.H. DeCarlo, B.D. Eyre, D.I. Kline, T. Martz, H. Page, N.N. Price, J. Smith, L. Stoltenberg, M. Tresguerres, and A.J. Andersson. 2020. Diel temperature and pH variability scale with depth across diverse coral reef habitats. Limnology and Oceanography Letters, 5(2): 193–203. https://doi.org/10.1002/lol2.10129
Platz, M.C., Y. Takeshita, E. Bartels, and M.E. Arias. 2020. Evaluating the potential for autonomous measurements of net community production and calcification as a tool for monitoring coral restoration. Ecological Engineering, 158: 1–10. https://doi.org/10.1016/j.ecoleng.2020.106042
Doo, S., A. Kealoha, A. Andersson, A. Choen, T.L. Hicks, Z.I. Johnson, M.H. Long, P. McElhany, N. Mollica, K.E. Shamberger, N.J. Silbiger, Y. Takeshita, and D.S. Busch. 2020. The challenges of detecting and attributing ocean acidification impacts on marine ecosystems. ICES Journal of Marine Science, 77(7-8): 2411–2422. https://doi.org/10.1093/icesjms/fsaa094
Hirsh, H.K., K.J. Nickols, Y. Takeshita, S.B. Traiger, D.A. Mucciarone, S. Monismith, and R.B. Dunbar. 2020. Drivers of biogeochemical variability in a central California kelp forest: Implications for local amelioration of ocean acidification. JGR Oceans, 25: 1–22. https://doi.org/10.1029/2020JC016320
Takeshita, Y., K.S. Johnson, L.J. Colletti, H. Jannasch, P.M. Walz, and J.K. Warren. 2020. Assessment of pH dependent errors in spectrophotometric pH measurements of seawater. Marine Chemistry, 223(103801): 1–7. https://doi.org/10.1016/j.marchem.2020.103801
Silveira, C.B., A. Luque, T.N. Roach, H. Villela, A. Barno, K. Green, B. Reyes, E. Rubio-Portillo, S. Mead, M. Hatay, M.J. Vermeij, Y. Takeshita, A. Haas, B. Bailey, and F. Rohwer. 2019. Biophysical and physiological processes causing oxygen loss from coral reefs. Elife, 8(e49114): 1–24. https://doi.org/10.7554/eLife.49114
Ninokawa, A., Y. Takeshita, B.M. Jellison, L. Jurgens, and B. Gaylord. 2019. Biological modification of seawater chemistry by an ecosystem engineer, the California mussel, Mytilus californianus. Limnology and Oceanography, 65: 157–172. https://doi.org/10.1002/lno.11258
Koweek, D.A., A. Forde, R. Albright, Y. Takeshita, D.A. Mucciarone, A. Ninokawa, and K. Caldeira. 2019. Carbon isotopic fractionation in organic matter production consistent with benthic community composition across a coral reef flat. Frontiers in Marine Science, 5: 1–14. https://doi.org/10.3389/fmars.2018.00520
Claustre, H., K.S. Johnson, and Y. Takeshita. 2019. Observing the global ocean with Biogeochemical-Argo. Annual Review of Marine Science, 12: 23–48. https://doi.org/10.1146/annurev-marine-010419-010956
Fox, M.D., A.L. Carter, C.B. Edwards, Y. Takeshita, M.D. Johnson, V. Petrovic, C.G. Amier, E. Sala, S.A. Sandin, and J.E. Smith. 2019. Limited coral mortality following acute thermal stress and widespread bleaching on Palmyra Atoll, central Pacific. Coral Reefs, 38: 701–712. https://doi.org/10.1007/s00338-019-01796-7
Bushinsky, S.M., Y. Takeshita, and N.L. Williams. 2019. Observing changes in ocean carbonate chemistry: Our autonomous future. Current Climate Change Reports, 5: 207–220. https://doi.org/10.1007/s40641-019-00129-8
Albright, R., Y. Takeshita, D.A. Koweek, A. Ninokawa, K. Wolfe, T. Rivlin, Y. Nebuchina, J. Young, and K. Caldeira. 2018. Carbon dioxide addition to coral reef waters suppresses net community calcification. Nature, 555: 516–519. http://doi.org/10.1038/nature25968
Koweek, D.A., R.C. Zimmerman, K.M. Hewett, B. Gaylord, S.N. Giddings, K.J. Nickols, J.L. Ruesink, J.J. Stachowicz, Y. Takeshita, and K. Caldeira. 2018. Expected limits on the ocean acidification buffering potential of a temperature seagrass meadow. Ecological Applications, 28: 1964–1714. https://doi.org/10.1002/eap.1771
Cyronak, T., A.J. Andersson, S. D'Angelo, P.J. Bresnahan, C. Davidson, T. Kindeberg, J. Pennise, Y. Takeshita, and M. White. 2018. Short-term spatial and temporal carbonate chemistry variability in two contrasting seagrass meadows: Implications for pH buffering capacities. Estuaries and Coasts, 41: 1282–1296. http://dx.doi.org/10.1007/s12237-017-0356-5
Takeshita, Y., K.S. Johnson, T.R. Martz, J.N. Plant, and J.L. Sarmiento. 2018. Assessment of autonomous pH measurements for determining surface seawater partial pressure of CO2. Journal of Geophyiscal Research, 123: 4003–4013. https://doi.org/10.1029/2017JC013387
Takeshita, Y., T. Cyronak, T.R. Martz, T. Kindeberg, and A. Andersson. 2018. Coral reef carbonate chemistry variability at different functional scales. Frontiers in Marine Science, 5: 1–12. https://doi.org/10.3389/fmars.2018.00175
Takeshita, Y. 2017. Understanding feedbacks between ocean acidification and coral reef metabolism. Journal of Geophyiscal Research: Oceans, 122: 1639–1642. http://doi.org/10.1002/2017JC012740
Williams, N. L., L.W. Juranek, R.A. Feely, K.S. Johnson, J.L. Sarmiento, L.D. Talley, A.G. Dickson, A.R. Gray, R. Wanninkhof, J.L. Russell, S.C. Riser, and Y. Takeshita. 2017. Calculating surface ocean pCO2 from biogeochemical Argo floats equipped with pH: An uncertainty analysis. Global Biogeochemical Cycles, 31: 591–604. http://dx.doi.org/10.1002/2016GB005541
Briggs, E.M., E. Sandoval, S. Erten, Y. Takeshita, A.C. Kummel, and T.R. Martz. 2017. Solid State Sensor for Simultaneous Measurement of Total Alkalinity and pH of Seawater. ACS Sensors, 2: 1302–1309. http://doi.org/10.1021/acssensors.7b00305
Carter, B.R., R.A. Feely, N.L. Williams, A.G. Dickson, M.B. Fong, and Y. Takeshita. 2017. Updated Methods for Global Locally Interpolated Estimation of Alkalinity, pH, and Nitrate. Limnology and Oceanography: Methods, 16: 119–131. https://doi.org/10.1002/lom3.10232
Johnson, K.S., H.W. Jannasch, L.J. Coletti, V.A. Elrod, T.R. Martz, Y. Takeshita, R.J. Carlson, and J.G. Connery. 2016. Deep-Sea DuraFET: A pressure tolerant pH sensor designed for global sensor networks. Analytical Chemistry, 88: 3249–3256. http://dx.doi.org/10.1021/acs.analchem.5b04653
Takeshita, Y., T.R. Martz, L.J. Coletti, A.G. Dickson, H.W. Jannasch, and K.S. Johnson. 2016. The effects of pressure on pH of Tris buffer in synthetic seawater. Marine Chemistry, 188: 1–5. http://dx.doi.org/10.1016/j.marchem.2016.11.002
Bresnahan Jr., P.J., T.R. Martz, Y. Takeshita, K.S. Johnson, and M. LaShomb. 2014. Best practices for autonomous measurement of seawater pH with the Honeywell Durafet. Methods in Oceanography, 9: 44–60. http://dx.doi.org/10.1016/j.mio.2014.08.003
Takeshita, Y., T.R. Martz, K.S. Johnson, and A.G. Dickson. 2014. Characterization of an ion sensitive field effect transistor and chloride ion selective electrodes for pH measurements in seawater. Analytical Chemistry, 86: 11189–11195. http://dx.doi.org/10.1021/ac502631z
Takeshita, Y., T.R. Martz, K.S. Johnson, J.N. Plant, D. Gilbert, S.C. Riser, C. Neill, and B. Tilbrook. 2013. A climatology-based quality control procedure for profiling float oxygen data. Journal of Geophysical Research: Oceans, 118: 5640–5650. http://dx.doi.org/10.1002/jgrc.20399
Hofmann, G.E., J.E. Smith, K.S. Johnson, U. Send, L.A. Levin, F. Micheli, A. Paytan, N.N. Price, B. Peterson, Y. Takeshita, P.G. Matson, E.D. Crook, K.J. Kroeker, M.C. Gambi, E.B. Rivest, C.A. Frieder, P.C. Yu, and T.R. Martz. 2011. High-frequency dynamics of ocean pH: a multi-ecosystem comparison. PLoS ONE, 6: e28983. http://dx.doi.org/10.1371/journal.pone.0028983
Cyronak, T., Andersson, A.J., D'Angelo, S., Bresnahan, P.J., Davidson, C., Finlay, A., Kindeberg, T., Pennise, J., Takeshita, Y., White, M. (In Press). Spatial and temporal carbonate chemistry variability in two contrasting seagrass meadows: Implications for ocean acidification buffering capacities. Estuaries and Coasts : .