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
Chen, H., F.A. Haumann, L.D. Talley, K.S. Johnson, and J.L. Sarmiento. 2022. The deep ocean's carbon exhaust. Global Biogeochemical Cycles, 36(7): 1–21. https://doi.org/10.1029/2021GB007156
Huang, Y., A.J. Fassbender, J.S. Long, S. Johannessen, and M.B. Bif. 2022. Partitioning the export of distinct biogenic carbon pools in the Northeast Pacific Ocean using a biogeochemical profiling float. Global Biogeochemical Cycles, 36: 1–19. https://doi.org/10.1029/2021GB007178
Johnson, K.S., and M.B. Bif. 2021. Constraint on net primary productivity of the global ocean by Argo oxygen measurements. Nature Geoscience, 14: 769–774. https://doi.org/10.1038/s41561-021-00807-z
Maurer, T.L., J.N. Plant, and K.S. Johnson. 2021. Delayed-mode quality control of oxygen, nitrate, and pH data on SOCCOM biogeochemical profiling floats. Frontiers in Marine Science, 8: 1–20. https://doi.org/10.3389/fmars.2021.683207
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
Chai, F., K.S. Johnson, H. Claustre, X. Xing, Y. Wang, E. Boss, S. Riser, K. Fennel, O. Schofield, and A. Sutton. 2020. Monitoring ocean biogeochemistry with autonomous platforms. Nature Reviews Earth and Environment, 1: 315–326. https://doi.org/10.1038/s43017-020-0053-y
Haskell II , W.Z., A.J. Fassbender, J.S. Long, and J.N. Plant. 2020. Annual net community production of particulate and dissolved organic carbon from a decade of biogeochemical profiling float observations in the Northeast Pacific. Global Biogeochemical Cycles, 34: 1–22. https://doi.org/10.1029/2020GB006599
Haumann, F.A., R. Moorman, S.C. Riser, L.H. Smedsrud, T. Maksym, A.P.S. Wong, E.A. Wilson, R. Drucker, L.D. Talley, K.S. Johnson, R.M. Key, and J.L. Sarmiento. 2020. Supercooled Southern Ocean waters. Geophysical Research Letters, 47: 1–11. https://doi.org/10.1029/2020GL090242
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
Bronselaer, B., J.L. Russell, M. Winton, N.L. Williams, R.M. Key, J.P. Dunne, R.A. Feely, K.S. Johnson, and J.L. Sarmiento. 2019. Importance of wind and meltwater for observed chemical and physical changes in the Southern Ocean. Nature Geoscience, 13: 35–42. https://doi.org/10.1038/s41561-019-0502-8
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
Johnson, K.S., S.C. Riser, and M. Ravichandran. 2019. Oxygen variability controls denitrification in the Bay of Bengal oxygen minimum zone. Geophysical Research Letters, 46: 804–811. https://doi.org/10.1029/2018GL079881
Roemmich, D., M.H. Alford, H. Claustre, K. Johnson, B. King, J. Moum, P. Oke, W.B. Owens, S. Pouliquen, S. Purkey, M. Scanderbeg, T. Suga, S. Wijffels, N. Zilberman, D. Bakker, M. Baringer, M. Belbeoch, H.C. Bittig, E. Boss, P. Calil, F. Carse, T. Carval, F. Chai, D.O. Conchubhair, F. d'Ortenzio, G. Dall'Olmo, D. Desbruyeres, K. Fennel, I. Fer, R. Ferrari, G. Forget, H. Freeland, T. Fujiki, M. Gehlen, B. Greenan, R. Hallber, T. Hibiya, S. Hosoda, S. Jayne, M. Jochum, G.C. Johnson, K. Kang, N. Kolodziejczyk, A. Kortzinger, P.Y. Le Traon, Y.D. Lenn, G. Maze, K.A. Mork, T. Morris, T. Nagai, J. Nash, A.N. Garabato, A. Olsen, R.R. Pattabhi, S. Prakash, S. Riser, C. Schmechtig, C. Schmid, E. Shroyer, A. Sterl, P. Sutton, L.D. Talley, T. Tanhua, V. Thierry, S. Thomalla, J. Toole, A. Troisi, T.W. Trull, J. Turton, P.J. Velez-Belchi, W. Walczowski, H. Wang, R. Wanninkhof, A.F. Waterhouse, S. Waterman, A. Watson, C. Wilson, A.P.S. Wong, J. Xu, and I. Yasuda. 2019. On the future of Argo: A global, full-depth, multi-disciplinary array. Frontiers in Marine Science, 6: 1–28. https://doi.org/10.3389/fmars.2019.00439
Arteaga, L., N. Haëntjens, E.S. Boss, K.S. Johnson, and J.L. Sarmiento. 2018. Assessment of export efficiency equations in the Southern Ocean applies to satellite-based net primary production. Journal of Geophyiscal Research: Oceans, 123: 2945–2964. https://doi.org/10.1002/2018JC013787
Carranza, M.M., S.T. Gille, P.J.S. Franks, K.S. Johnson, R. Pinkel, and J.B. Girton. 2018. When mixed layers are not mixed. Storm-driven mixing and bio-optical vertical gradients in mixed layers of the Southern Ocean. Journal of Geophyiscal Research, 123: 7264–7289. https://doi.org/10.1029/2018JC014416
Fawcett, S. E., K.S. Johnson, S.C. Riser, N. Van Oostende, and D.M. Sigman. 2018. Low-nutrient organic matter in the Sargasso Sea thermocline: A hypothesis for its role, identity, and carbon cycle implications. Marine Chemistry, 207: 108–123. https://doi.org/10.1016/j.marchem.2018.10.008
Fritzsche, E., C. Staudinger, J.P. Fischer, R. Thar, H. Jannasch, J.N. Plant, M. Blum, G. Massion, H. Thomas, J. Hoech, K.S. Johnson, S.M. Borisov, and I. Klimant. 2018. A validation and comparison study of new, compact, versatile optodes for oxygen, pH and carbon dioxide in marine environments. Marine Chemistry, 207: 63–76. https://doi.org/10.1016/j.marchem.2018.10.009
Gray, A. R., K.S. Johnson, S.M. Bushinsky, S.C. Riser, J.L. Russell, L.D. Talley, R. Wanninkhof, N.L. Williams, and J.L. Sarmiento. 2018. Autonomous biogeochemical floats detect a significant carbon dioxide outgassing in the high-latitude Southern Ocean . Geophysical Research Letters, 45: 9049–9057. https://doi.org/10.1029/2018GL078013
Mayot, N., P.A. Matrai, I.H. Ellingsen, M. Steele, K. Johnson, S.C. Riser, and D.D. Swift. 2018. Assessing phytoplankton activities in the seasonal ice zone of the Greenland Sea over an annual cycle. Journal of Geophyiscal Research: Oceans, 123: 8004–8025. https://doi.org/10.1029/2018JC014271
Russell, J. L., I. Kamenkovich, C. Bitz, R. Ferrari, S.T. Gille, P.J. Goodman, R. Hallberg, K.S. Johnson, K. Khazmutdinova, I. Marinov, M.R. Mazloff, S.C. Riser, J.L. Sarmiento, K.G. Speer, L.D. Talley, and R. Wanninkhof. 2018. Metrics for the evaluation of the Southern Ocean in coupled climate models and Earth system models. Journal of Geophysical Research: Oceans, 123: 3120–3143. https://agupubs.onlinelibrary.wiley.com/doi/full/10.1002/2017JC013461
Stanev, E.V., P.M. Poulain, S. Grayek, K.S. Johnson, H. Claustre, and J.W. Murray. 2018. Understanding the dynamics of the oxic-anoxic interface in the Black Sea. Geophysical Research Letters, 45: 864–871. https://doi.org/10.1002/2017GL076206
Swart, S., K.S. Johnson, M.R. Mazloff, A. Meijers, M.P. Meredith, L. Newman, and J.B. Sallée. 2018. The Southern Ocean. State of the Climate in 2017, 99: S185–S190. http://doi.org/10.1175/2018BAMSStateoftheClimate.1
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
Talley, L. D., I. Rosso, I. Kamenkovich, M.R. Mazloff, J. Wang, E.S. Boss, A.R. Gray, K.S. Johnson, R. Key, S.C. Riser, N.L. Williams, and J.L. Sarmiento. 2018. Southern Ocean biogeochemical float deployment strategy, with example from the Greenwich Meridian line (GO-SHIP A12). Journal of Geophyiscal Research, 124(1): 403–431. https://doi.org/10.1029/2018JC014059
Williams, N.L., L.W. Juranek, R.A. Feely, J.L. Russell, K.S. Johnson, and B. Hales. 2018. Assessment of the carbonate chemistry seasonal cycles in the Southern Ocean from persistent observational platforms. Journal of Geophysical Research: Oceans, 123: 4833–4852. https://doi.org/10.1029/2017JC012917
Jayne, S., D. Roemmich, N. Zilberman, S. Riser, K. Johnson, G. Johnson, and S. Piotrowicz. 2017. The Argo Program: Present and Future. Oceanography, 30: 18–28. http://dx.doi.org/10.5670/oceanog.2017.213
Johnson, K.S., J.N. Plant, J.P. Dunne, L.D. Talley, and J.L. Sarmiento. 2017. Annual nitrate drawdown observed by SOCCOM profiling floats and the relationship to annual net community production. Journal of Geophysical Research: Oceans, 122: 6668–6683. http://dx.doi.org/10.1002/2017JC012839
Johnson, K.S., J.N. Plant, L.J. Coletti, H.W. Jannasch, C.M. Sakamoto, S.C. Riser, D.D. Swift, N.L. Williams, E. Boss, N. Haëntjens, L.D. Talley, and J.L. Sarmiento. 2017. Biogeochemical sensor performance in the SOCCOM profiling float array. Journal of Geophysical Research: Oceans, 122: 6416–6436. http://dx.doi.org/10.1002/2017JC012838
McLaughlin, K., A. Dickson, S.B. Weisberg, K. Coale, V. Elrod, C. Hunter, K.S. Johnson, S. Kram, R. Kudela, T. Martz, K. Negrey, U. Passow, F. Shaughnessy, J.E. Smith, D. Tadesse, L. Washburn, and K.R. Weis. 2017. An evaluation of ISFET sensors for coastal pH monitoring applications. Regional Studies in Marine Science, 12: 11–18. http://dx.doi.org/10.1016/j.rsma.2017.02.008
Sakamoto, C.M., K.S. Johnson, L.J. Coletti, and H.W. Jannasch. 2017. Pressure correction for the computation of nitrate concentrations in seawater using an in situ ultraviolet spectrophotometer. Limnology and Oceanography: Methods, 15(10): 897–902. http://dx.doi.org/10.1002/lom3.10209
Sakamoto, C.M., K.S. Johnson, L.J. Coletti, T.L. Maurer, G. Massion, J.T. Pennington, J.N. Plant, H.W. Jannasch, and F.P. Chavez. 2017. Hourly in situ nitrate on a coastal mooring: A 15-year record and insights into new production. Oceanography, 30: 114–127. https://doi.org/10.5670/oceanog.2017.428
Tagliabue, A., A.R. Bowie, P.W. Boyd, K.N. Buck, K.S. Johnson, and M.A. Saito. 2017. The integral role of iron in ocean biogeochemistry. Nature, 543: 51–59. http://dx.doi.org/10.1038/nature21058
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
Claustre, H., and K. Johnson (Biogeochemical-Argo Planning Group). The scientific rationale, design and implementation plan for a biogeochemical-Argo float array. Ifremer, 2016: 1–65. http://dx.doi.org/10.13155/46601
Branham, C.W., D. Murphy, K. Johnson, and H. Jannasch. 2016. Optimization of a robust and reliable ISFET sensor for measuring pH in the deep ocean. Marine Technology Society / Institute of Electrical and Electronics Engineers Oceans Conference, 2016: 1–4. http://dx.doi.org/10.1109/OCEANS.2016.7761357
Johnson, K.S., and H. Claustre. 2016. "Bringing biogeochemistry into the Argo age." Eos, 8 November 2016. http://dx.doi.org/10.1029/2016EO062427
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
Plant, J.N., K.S. Johnson, C.M. Sakamoto, H.W. Jannasch, L.J. Coletti, S.C. Riser, and D.D. Swift. 2016. Net community production at Ocean Station Papa observed with nitrate and oxygen sensors on profiling floats. Global Biogeochemical Cycles, 30: 859–879. http://dx.doi.org/10.1002/2015GB005349
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
Williams, N.L., L.W. Juranek, K.S. Johnson, R.A. Feely, S.C. Riser, L.D. Talley, J.L. Russell, J.L. Sarmiento, and R. Wanninkhof. 2016. Empirical algorithms to estimate water column pH in the Southern Ocean. Geophysical Research Letters, 43: 3415–3422. http://dx.doi.org/10.1002/2016GL068539
Johnson, K.S., J.N. Plant, S.C. Riser, and D. Gilbert. 2015. Air oxygen calibration of oxygen optodes on a profiling float array. Journal of Atmospheric and Oceanic Technology, 32: 2160–2172. http://dx.doi.org/10.1175/jtech-d-15-0101.1
Wasson, K., B. Suarez, A. Akhavan, E. McCarthy, J. Kildow, K.S. Johnson, M.C. Fountain, A. Woolfolk, M. Silberstein, L. Pendleton, and D. Feliz. 2015. Lessons learned from an ecosystem-based management approach to restoration of a California estuary. Marine Policy, 58: 60–70. http://dx.doi.org/10.1016/j.marpol.2015.04.002
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
Nidzieko, N.J., J.A. Needoba, S.G. Monismith, and K.S. Johnson. 2014. Fortnightly tidal modulations affect net community production in a mesotidal estuary. Estuaries and Coasts, 37: 91–110. http://dx.doi.org/10.1007/s12237-013-9765-2
Takano, Y., T. Ito, C. Deutsch, and K.S. Johnson. 2014. Interpreting intraseasonal variability of subsurface tracers observed by a profiling float. Journal of Geophysical Research: Oceans, 119: 288–296. http://dx.doi.org/10.1002/2013JC009290
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
Ascani, F., K.J. Richards, E. Firing, S. Grant, K.S. Johnson, Y. Jia, R. Lukas, and D.M. Karl. 2013. Physical and biological controls of nitrate concentrations in the upper subtropical North Pacific Ocean. Deep Sea Research II, 93: 119–134. http://dx.doi.org/10.1016/j.dsr2.2013.01.034
Hughes, B.B., R. Eby, E. Van Dyke, M.T. Tinker, C.I. Marks, K.S. Johnson, and K. Wasson. 2013. Recovery of a top predator mediates negative eutrophic effects on seagrass. Proceedings of the National Academy of Sciences, 110: 15313–15318. http://dx.doi.org/10.1073/pnas.1302805110
Johnson, K.S., L.J. Coletti, H.W. Jannasch, C.M. Sakamoto, D.D. Swift, and S.C. Riser. 2013. Long-term nitrate measurements in the ocean using the In Situ Ultraviolet Spectrophotometer: Sensor integration into the APEX profiling float. Journal of Atmospheric and Oceanic Technology, 30: 1854–1866. http://dx.doi.org/10.1175/JTECH-D-12-00221.1
Santoro, A.E., C.M. Sakamoto, J.M. Smith, J.N. Plant, A.L. Gehman, A.Z. Worden, K.S. Johnson, C.A. Francis, and K.L. Casciotti. 2013. Measurements of nitrite production and nitrite-producing organisms in and around the primary nitrite maximum in the central California Current. Biogeosciences Discussions, 10: 5803–5840. http://dx.doi.org/10.5194/bgd-10-5803-2013
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
Gray, S.E.C., M.D. DeGrandpre, T.S. Moore, T.R. Martz, G.E. Friederich, and K.S. Johnson. 2011. Applications of in situ pH measurements for inorganic carbon calculations. Marine Chemistry, 125: 82–90. http://dx.doi.org/10.1016/j.marchem.2011.02.005
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
Johnson, K.S., J.P. Barry, L.J. Coletti, S.E. Fitzwater, H.W. Jannasch, and C.F. Love. 2011. Nitrate and oxygen flux across the sediment-water interface observed by eddy correlation measurements on the open continental shelf. Limnology and Oceanography Methods, 9: 543–553. http://dx.doi.org/10.4319/lom.2011.9.543
Paerl, R.W., K.S. Johnson, R.M. Welsh, A.Z. Worden, F.P. Chavez, and J.P. Zehr. 2011. Differential distributions of Synechococcus subgroups across the California current system. Frontiers in Aquatic Microbiology, 2: 1–22. http://dx.doi.org/10.3389/fmicb.2011.00059
Johnson, K.S. 2010. Simultaneous measurements of nitrate, oxygen, and carbon dioxide on oceanographic moorings: Observing the Redfield ratio in real-time. Limnology and Oceanography, 55: 615–627.
Johnson, K.S., S.C. Riser, and D.M. Karl. 2010. Nitrate supply from deep to near-surface waters of the north Pacific subtropical gyre. Nature, 465: 1062–1065. http://dx.doi.org/10.1038/nature09170
Martz, T.R., J.G. Connery, and K.S. Johnson. 2010. Testing the Honeywell Durafet® for seawater pH applications. Limnology and Oceanography: Methods, 8: 172–184. http://dx.doi.org/10.4319/lom.2010.8.172
Moisander, P.H., R.A. Beinart, I. Hewson, A.E. White, K.S. Johnson, C.A. Carlson, J.P. Montoya, and J.P. Zehr. 2010. Unicellular cyanobacterial distributions broaden the oceanic N2 fixation domain. Science, 327: 1509–1511. http://dx.doi.org/10.1126/science.1185468
Plant, J.N., K.S. Johnson, S.E. Fitzwater, C.M. Sakamoto, L.J. Coletti, and H.W. Jannasch. 2010. Tidally oscillating bisulfide fluxes and fluid flow rates observed with in situ chemical sensors at a warm spring in Monterey Bay, California. Deep-Sea Research Part I, 57: 1585–1595. http://dx.doi.org/10.1016/j.dsr.2010.10.001
Johnson, K.S., W.M. Berelson, E.S. Boss, Z. Chase, H. Claustre, S.R. Emerson, N. Gruber, A. Körtzinger, M.J. Perry, and S.C. Riser. 2009. Observing biogeochemical cycles at global scales with profiling floats and gliders: Prospects for global array. Oceanography, 22: 216–225.
Martz, T.R., H.W. Jannasch, and K.S. Johnson. 2009. Determination of carbonate ion concentration and inner sphere carbonate ion pairs in seawater by ultraviolet spectrophotometric titration. Marine Chemistry, 115: 145–154. http://dx.doi.org/10.1016/j.marchem.2009.07.002
Plant, J.N., K.S. Johnson, J.A. Needoba, and L.J. Coletti. 2009. NH4-Digiscan: An in situ and laboratory ammonium analyzer for estuarine, coastal and shelf waters. Limnology and Oceanography: Methods, 7: 144–156.
Sakamoto, C.M., K.S. Johnson, and L.J. Coletti. 2009. An improved algorithm for the computation of nitrate concentrations in seawater using an in situ ultraviolet spectrophotometer. Limnology and Oceanography: Methods, 7: 132–143.
Buesseler, K.O., S. Doney, D.M. Karl, P.W. Boyd, K. Caldeira, F. Chai, K.H. Coale, H.J.W. de Baar, P. Falkowski, K.S. Johnson, R. Lampitt, A. Michaels, W. Naqvi, V. Smetacek, S. Takeda, and A. Watson. 2008. Ocean iron fertilization—moving forward in a sea of uncertainty. Science, 319: 162. http://dx.doi.org/10.1126/science.1154305
Elrod, V.A., K.S. Johnson, S.E. Fitzwater, and J.N. Plant. 2008. A long-term, high-resolution record of surface water iron concentrations in the upwelling-driven central California region. Journal of Geophysical Research, 113: 1–13. http://dx.doi.org/10.1029/2007JC004610
Holm, C.S., Z. Chase, H.W. Jannasch, and K.S. Johnson. 2008. Development and initial deployments of an autonomous in situ instrument for long-term monitoring of copper (II) in the marine environment. Limnology and Oceanography: Methods, 6: 336–346.
Jannasch, H.W., L.J. Coletti, K.S. Johnson, S.E. Fitzwater, J.A. Needoba, and J.N. Plant. 2008. The Land/Ocean Biogeochemical Observatory: A robust networked mooring system for continuously monitoring complex biogeochemical cycles in estuaries. Limnology and Oceanography: Methods, 6: 263–276.
Johnson, K.S., and J.A. Needoba. 2008. Mapping the spatial variability of plankton metabolism using nitrate and oxygen sensors on an autonomous underwater vehicle. Limnology and Oceanography, 53: 2237–2250. http://dx.doi.org/10.4319/lo.2008.53.5_part_2.2237
Martz, T.R., K.S. Johnson, and S.C. Riser. 2008. Ocean metabolism observed with oxygen sensors on profiling floats in the Pacific. Limnology and Oceanography, 53: 2094–2111. http://dx.doi.org/10.4319/lo.2008.53.5_part_2.2094
Riser, S.C, and K.S. Johnson. 2008. Net production of oxygen in the subtropical ocean. Nature, 451: 323–325. http://dx.doi.org/10.1038/nature06441
Johnson, K.S., E. Boyle, K. Bruland, K. Coale, C. Measures, J. Moffett, A. Aguilar-Islas, K. Barbeau, B. Bergquist, A. Bowie, K. Buck, Y. Cai, Z. Chase, J. Cullen, T. Doi, V. Elrod, S. Fitzwater, M. Gordon, A. King, P. Laan, L. Laglera-Baquer, W. Landing, M. Lohan, J. Mendez, A. Milne, H. Obata, L. Ossiander, J. Plant, G. Sarthou, P. Sedwick, G.J. Smith, B. Sohst, S. Tanner, S. Van den Berg, and J. Wu. 2007. The SAFe Iron Intercomparison Cruise: An international collaboration to develop dissolved iron in seawater standards. EOS, Transactions of the American Geophysical Union, 88: 131–132.
Johnson, K.S., J.A. Needoba, S.C. Riser, and W.J. Showers. 2007. Chemical sensor networks for the aquatic environment. Chemical Reviews, 107: 623–640. http://dx.doi.org/10.1021/cr050354e
Needoba, J.A., R.A. Foster, C.M. Sakamoto, J.P. Zehr, and K.S. Johnson. 2007. N2-fixation by unicellular cyanobacterial diazotrophs in the temperate, oligotrophic North Pacific. Limnology and Oceanography, 52: 1317–1327.
Chase, Z., A. Paytan, K.S. Johnson, J. Street, and Y. Chen. 2006. Input and cycling of iron in the Gulf of Aqaba, Red Sea. Global Biogeochemical Cycles, 20: GB3017. http://dx.doi.org/10.1029/2005GB002646
Johnson, K.S. 2006. Manganese redox chemistry revisited. Science, 313: 1896–1897. http://dx.doi.org/10.1126/science.1133496
Johnson, K.S., L.J. Coletti, and F.P. Chavez. 2006. Diel nitrate cycles observed with in situ sensors predict monthly and annual new production. Deep-Sea Research Part I, 53: 561–573. http://dx.doi.org/10.1016/j.dsr.2005.12.004
Chase, Z., K.S. Johnson, V.A. Elrod, J.N. Plant, S.E. Fitzwater, L. Pickell, and C.M. Sakamoto. 2005. Manganese and iron distributions off central California influenced by upwelling and shelf width. Marine Chemistry, 95: 235–254. http://dx.doi.org/10.1016/j.marchem.2004.09.006
Ryan, J.P., H.M. Dierssen, R.M. Kudela, C.A. Scholin, K.S. Johnson, J.M. Sullivan, A.M. Fischer, E.V. Rienecker, P.R. McEnaney, and F.P. Chavez. 2005. Coastal ocean physics and red tides: An example from Monterey Bay, California. Oceanography, 18: 246–255.
Berelson, W., J. McManus, K. Coale, K.S. Johnson, D. Burdidge, T. Kilgore, D. Colodner, F.P. Chavez, R. Kudela, and J. Boucher. 2003. A time series of benthic flux measurements from Monterey Bay, California. Continental Shelf Research, 23: 457–481.
Coale, K.H., X. Wang, S.J. Tanner, and K.S. Johnson. 2003. Phytoplankton growth and biological response to iron and zinc addition in the Ross Sea and Antarctic Circumpolar Current along 170°W. Deep-Sea Research II, 50: 635–653. http://dx.doi.org/10.1016/S0967-0645(02)00588-X
Johnson, K.S. 2003. State of technology in the development and application of nutrient sensors. Alliance for Coastal Technologies Workshop Proceedings: 18.
Johnson, K.S., V.A. Elrod, S.E. Fitzwater, J.N. Plant, F.P. Chavez, S.J. Tanner, R.M. Gordon, D.L. Westphal, K.D. Perry, J. Wu, and D.M. Karl. 2003. Surface ocean-lower atmosphere interactions in the Northeast Pacific Ocean Gyre: Aerosols, iron and the ecosystem response. Global Biogeochemical Cycles, 17: 1063. http://dx.doi.org/10.1029/2002gb002004
Johnson, K.S., and D.M. Karl. 2002. Is ocean fertilization credible and creditable?. Science, 296: 467.
Johnson, K.S., and L.J. Coletti. 2002. In situ ultraviolet spectrophotometry for high resolution and long-term monitoring of nitrate, bromide and bisulfide in the ocean. Deep-Sea Research Part I, 49: 1291–1305. http://dx.doi.org/10.1016/S0967-0637(02)00020-1
Guenther, E.A., K.S. Johnson, and K.H. Coale. 2001. Direct ultraviolet spectrophotmetric determination of total sulfide and iodide in natural waters. Analytical Chemistry, 73: 3481–3487.
Johnson, K.S. 2001. Iron supply and demand in the upper ocean: Is extraterrestrial dust a significant source of bioavailable iron? Global Biogeochemical Cycles, 15: 61–63.
Johnson, K.S., C.K. Paull, J.P. Barry, and F.P. Chavez. 2001. A decadal record of underflows from a coastal river into the deep sea. Geology, 29: 1019–1022. http://dx.doi.org/10.1130/0091-7613(2001)029<1019_Adrouf>2.0.Co;2
Johnson, K.S., F.P. Chavez, V.A. Elrod, S.E. Fitzwater, J.T. Pennington, K.R. Buck, and P.M. Walz. 2001. The annual cycle of iron and the biological response in central California coastal waters. Geophysical Research Letters, 28: 1247–1250. http://dx.doi.org/10.1029/2000gl012433
Archer, D.E., and K.S. Johnson. 2000. A model of the iron cycle in the ocean. Global Biogeochemical Cycles, 14: 269–279. http://dx.doi.org/10.1029/1999gb900053
Fitzwater, S.E., K.S. Johnson, R.M. Gordon, K.H. Coale, and W.O. Smith Jr. 2000. Trace metal concentrations in the Ross Sea and their relationship with nutrients and phytoplankton growth. Deep-Sea Research II, 47: 3159–3179. http://dx.doi.org/10.1016/S0967-0645(00)00063-1
Johnson, K.S., and R. Byrne. 2000. Modern autonomous observing systems. Ocean Carbon Transport, Exchanges and Transformations, Proceedings of a Workshop: 41–55.
Johnson, K.S., V.A. Elrod, J.L. Nowicki, K.H. Coale, and H. Zamzow. 2000. Continuous flow techniques for on site and in situ measurements of metals and nutrients in sea water. In situ monitoring of aquatic systems: Chemical analysis and speciation: 223–252.
Blain, S., H. Jannasch, and K.S. Johnson. 1999. In situ chemical analyzers with colorimetric detection. Chemical sensors in oceanography: 49–70.
Burdige, D.J., W.M. Berelson, K.H. Coale, J. McManus, and K.S. Johnson. 1999. Fluxes of dissolved organic carbon from California continental margin sediments. Geochimica et Cosmochimica Acta, 63: 1507–1515. http://dx.doi.org/10.1016/S0016-7037(99)00066-6
Johnson, K.S. 1999. Shipboard and laboratory chemical analysis. The future of ocean chemistry in the U.S.: Report of the FOCUS workshop: 97–102.
Johnson, K.S., C. Reimers, and M. DeGrandpre. 1999. In situ chemical analysis. The future of ocean chemistry in the U.S.: Report of the FOCUS workshop: 89–95.