Year Published

Displaying 1-100 of 133 Publications


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.

Johnson, K.S., F.P. Chavez, and G.E. Friederich. 1999. Continental-shelf sediment as a primary source of iron for coastal phytoplankton. Nature, 398: 697–700.