Year Published

Displaying 1-100 of 134 Publications


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.

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 Science10.


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.

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.


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.

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.

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.


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.

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.

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.

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.


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.

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.

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.


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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.


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.

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.

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.

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.

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.

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.

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.


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.

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.

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.

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.

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.

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.


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.

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.


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.

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.

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.

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.


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.

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.

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.

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.

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.


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.

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.

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.

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.


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.

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.

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.

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.


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.

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.

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.

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.


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.

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.

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.


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.

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.

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.


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.


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., 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.


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.

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.

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.