Jon holding a yellow tube used for research

Jonathan D. Sharp

  • Research Scientist

Research interests:

I investigate changes to global ocean chemistry and biogeochemical processes using observations from the global array of biogeochemical Argo profiling floats, large-scale research cruises, fixed ocean moorings, and other observational platforms. This includes the study of ocean carbon uptake, acidification, and deoxygenation. I am also interested in exploring machine learning techniques to create useful data products from ocean observations.

Selected publications

  • Carter, B.R., Sharp, J.D., Dickson, A.G., et al. Uncertainty sources for measurable ocean carbonate chemistry variables. Limnology and Oceanography, https://doi.org/10.1002/lno.12477
  • Fassbender, A.J., Carter, B.R., Sharp, J.D., Huang, Y., Arroyo, M.C., Frenzel, H. Amplified subsurface signals of ocean acidification. Global Biogeochemical Cycles, 37, 12, 10.1029/2023GB007843
  • Mogen, S.C., Lovenduski, N.S., Yeager, S., Keppler, L., Sharp, J.D., Bograd, S.J., Quiros, N.C., Di Lorenzo, E., Hazen, E.L. Jacox, M.G., Pozo Buil, M., Skillful multi-month predictions of ecosystem stressors in the surface and subsurface ocean. Earth’s Future, 11, 10.1029/2023EF003605
  • Erickson, Z.K., Carter, B.R., Feely, R.A., Johnson, G.C., Sharp, J.D., Sonnerup, R.E., 2023. PMEL’s contribution to observing and analyzing decadal global ocean changes through sustained repeat hydrography. Oceanography 36, 60–69. 10.5670/oceanog.2023.204
  • Sharp, J., 2023: Tracking Global Ocean Oxygen Content [in “State of the Climate in 2022”]. Bull. Amer. Meteor. Soc., 104, S28–S31, 10.1175/BAMS-D-23-0076.2
  • Sharp, J.D., Fassbender, A.J., Carter, B.R., Johnson, G.C., Schultz, C., Dunne, J.P., 2023. GOBAI-O2: temporally and spatially resolved fields of ocean interior dissolved oxygen over nearly two decades. Earth System Science Data, 15, 4481–4518, 10.5194/essd-15-4481-2023
  • Jiang, L.Q., Dunne, J., Carter, B.R., Tjiputra, J.F., Terhaar, J., Sharp, J.D., Olsen, A., Alin, S., Bakker, D.C., Feely, R.A., Hogan, P., Ilyina, T., Lange, N., Lauvset, S., Lovato, T., Palmieri, J., Santana-Falcón, Y., Schwinger, J., Séférian, R., Strand, G., Swart, N., Tanhua, T., Tsujino, H., Wanninkhof, R., Watanabe, M., Yamamoto, A., Ziehn, T., 2023. Global surface ocean acidification indicators from 1750 to 2100. Journal of Advances in Modeling Earth Systems, 15, 10.1029/2022MS003563
  • Sharp, J.D., Fassbender, A.J., Carter, B.R., Lavin, P.D., Sutton., A.J., 2022. A monthly surface pCO2product for the California Current Large Marine Ecosystem. Earth System Science Data 14, 2081–2108, 10.5194/essd-14-2081-2022
  • Jiang, L.Q., Pierrot, D., Wanninkhof, R., Feely, R.A., Tilbrook, B., Alin, S., Barbero, L., Byrne, R.H., Carter, B.R., Dickson, A., Gattuso, J.-P., Greeley, D., Hoppema, M., Humphreys, M.P., Karstensen, J., Lange, N., Lauvset, S.K., Lewis, E.R., Olsen, A., Pérez, F.F., Sabine, C., Sharp, J.D., Tanhua, T., Trull, T., Velo, A., Allegra, A.J., Barker, P., Burger, E., Cai, W.J., Chen, C.T., Cross, J., Garcia, H., Hernandez-Ayon, J.M., Hu, X., Kozyr, A., Langdon, C., Lee, K., Salisbury, J., Wang, Z.A., Xue, L., Yates, K., 2022. Best-practice Data Standards for Discrete Chemical Oceanographic Observations. Frontiers in Marine Science 8, 10.3389/fmars.2021.705638
  • Humphreys, M.P., Lewis, E.R., Sharp, J.D., Pierrot, D., 2022. PyCO2SYS v1.8: marine carbonate system calculations in Python. Geoscientific Model Development 15, 15–43, 10.5194/gmd-15-15-2022
  • Carter, B.R., Bittig, H.C., Fassbender, A.J., Sharp, J.D., Takeshita, Y., Xu, Y.-Y., Álvarez, M., Wanninkhof, R., Feely, R.A., Barbero, L., 2021. New and Updated Global Empirical Seawater Property Estimation Routines. Limnology and Oceanography: Methods 19, 785–809, 10.1002/lom3.10461
  • Sharp, J.D., Byrne, R.H., 2021. Technical note: Excess alkalinity in carbonate system reference materials. Marine Chemistry 233, 103965. 10.1016/j.marchem.2021.103965
  • Sharp, J.D., Byrne, R.H., 2020. Interpreting measurements of total alkalinity in marine and estuarine waters in the presence of proton-binding organic matter. Deep Sea Research Part I: Oceanographic Research Papers 165, 10.1016/j.dsr.2020.103338
  • Sharp, J.D., Byrne, R.H., 2019. Carbonate ion concentrations in seawater: Spectrophotometric determination at ambient temperatures and evaluation of propagated calculation uncertainties. Marine Chemistry 209, 70–80, 10.1016/j.marchem.2018.12.001
  • Sharp, J.D., Byrne, R.H., Liu, X., Feely, R.A., Cuyler, E.E., Wanninkhof, R., Alin, S.R., 2017. Spectrophotometric Determination of Carbonate Ion Concentrations: Elimination of Instrument-Dependent Offsets and Calculation of In Situ Saturation States. Environmental Science and Technology 51, 9127–9136, 10.1021/acs.est.7b02266