Chemical Sensors OverviewTeamProjectsLatest NewsPublicationsTechnologiesData The vastness of the ocean presents a daunting challenge for scientists: How can we interpret trends in ocean ecosystems when the measurements we make are few and far between? In the open sea, most scientists have historically relied on ships to transport them to locations where they spend only a short time capturing a snapshot of ocean conditions below the sea surface. In the coastal zone, where conditions may change hourly, most sampling is done once a month at most. Far offshore, processes that drive ecosystem structure and function often work on a seasonal time scale. Closer to the coast, similar processes operate much more rapidly. The problems this presents leads to a conclusion that all ocean scientists agree on: the ocean is grossly undersampled!Current records of fundamental properties such as oxygen, pH, nutrients, or chlorophyll describe a range of ocean states. However, the sample-to-sample variability observed in ocean time series may not reflect actual trends at any given location and time because so few measurements are collected. This limited sampling provides little scientific insight into the processes that actually underlie the snapshot observations.Developing new tools and techniques to overcome these challenges is a major driver of the Chemical Sensor Team’s activities. Application of this approach in Elkhorn Slough, near MBARI in Central California, highlights some of the advances in understanding when sampling resolution is more closely matched to environmental processes. Opportunities for deploying analogous sensor suites in the vast expanse of the Southern Ocean provide another perspective on how we can address the fundamental problem of “being there”. Know Your OceanPeriodic table of elements in the oceanOcean currents, chemistry, and biology influence the distribution of elements in the ocean. This periodic table explores the elements occurring in the Atlantic and Pacific oceans. Team Directory Ken Johnson Senior Scientist Principal Investigator Mariana Bernardi Bif Research Specialist Ben Davis Senior Research Technician Lisa Emanuelson Marine Operations and Vessel Compliance Assistant Gene Massion Ocean Engineer Tanya Maurer GO-BGC Data Lead Josh Plant Research Specialist Peter Walz Research Specialist Magdalena Carranza Research Associate Jessica Metter Research Technician Nicola Guisewhite Research Technician Guillaume Liniger Postdoctoral Fellow Logan Grady Research Technician Former Lab MembersThomas P Chapin (former postdoctoral fellow/now USGS)Zanna Chase (former Postdoctoral Fellow/now at University of Tasmania)Steve Fitzwater (former Research Technician/deceased)Patrick Gibson (former Postdoctoral Fellow)Todd Martz (former Postdoctoral Fellow/now at Scripps Institution of Oceanography)Joe Needoba (former Postdoctoral Fellow/now at Oregon Health and Science University). Projects All Projects Southern Ocean Carbon and Climate Observations and Modeling (SOCCOM) Project Southern Ocean Carbon and Climate Observations and Modeling (SOCCOM) SOCCOM is an NSF-sponsored program focused on unlocking the mysteries of the Southern Ocean and determining its influence on climate. Global Ocean Biogeochemistry Array (GO-BGC) Project Global Ocean Biogeochemistry Array (GO-BGC) The Global Ocean Biogeochemistry (GO-BGC) Array is a project to build a global network of chemical and biological sensors that will monitor ocean health. Land/Ocean Biogeochemical Observatory (LOBO) in Elkhorn Slough and Monterey Bay Project Land/Ocean Biogeochemical Observatory (LOBO) in Elkhorn Slough and Monterey Bay The Land-Ocean Biogeochemical Observatory (LOBO) consists of robust moorings that can withstand tidal currents and weather. Latest News All News News New research reveals the importance of storms in air-sea carbon exchange in the Southern Ocean News 08.13.24 News Robotic floats provide new look at ocean health and global carbon cycle Press Release 08.16.21 News New $53 million grant to create a world-wide fleet of robotic floats to monitor ocean health News 10.29.20 GO-BGC + OCB Webinar SeriesWhat’s climate change really doing to the ocean? Ask the robots Publications All Publications 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 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 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 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 Technologies All Technologies Instrument Deep-Sea DuraFet Technology Deep-Sea DuraFet A pressure tolerant ISFET pH sensor. Instrument Apex Profiling Floats Technology Apex Profiling Floats Profiling floats with ISUS nitrate sensors Instrument In Situ Ultraviolet Spectrophotometer (ISUS) Technology In Situ Ultraviolet Spectrophotometer (ISUS) A sensor that measures concentrations of dissolved chemicals from their ultraviolet absorption spectrum. Data All Data Data Adopt a Float Data Data query and visualization for the adopt-a-float program Data SOCCOM Float Data An interactive map that shows current locations and trajectories of SOCCOM biogeochemical floats and provides links to real-time raw and quality-controlled float data Data Mooring ISUS Measurements Near real time optical nitrate measurements on the M1 Mooring Data LOBOviz Data portal for the Land-Ocean Biogeochemical Observatory (LOBO) Data Ocean Float Data Viz Data from ISUS nitrate sensors and Deep-Sea DuraFET pH sensors in Webb Research Apex or Sea-Bird Electronics Navis profiling floats GO-BGC Viz External DataSOCCOM data pagesGO-BGC data pages
Southern Ocean Carbon and Climate Observations and Modeling (SOCCOM) Project Southern Ocean Carbon and Climate Observations and Modeling (SOCCOM) SOCCOM is an NSF-sponsored program focused on unlocking the mysteries of the Southern Ocean and determining its influence on climate.
Global Ocean Biogeochemistry Array (GO-BGC) Project Global Ocean Biogeochemistry Array (GO-BGC) The Global Ocean Biogeochemistry (GO-BGC) Array is a project to build a global network of chemical and biological sensors that will monitor ocean health.
Land/Ocean Biogeochemical Observatory (LOBO) in Elkhorn Slough and Monterey Bay Project Land/Ocean Biogeochemical Observatory (LOBO) in Elkhorn Slough and Monterey Bay The Land-Ocean Biogeochemical Observatory (LOBO) consists of robust moorings that can withstand tidal currents and weather.
News New research reveals the importance of storms in air-sea carbon exchange in the Southern Ocean News 08.13.24
News New $53 million grant to create a world-wide fleet of robotic floats to monitor ocean health News 10.29.20
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
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
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
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
Instrument Apex Profiling Floats Technology Apex Profiling Floats Profiling floats with ISUS nitrate sensors
Instrument In Situ Ultraviolet Spectrophotometer (ISUS) Technology In Situ Ultraviolet Spectrophotometer (ISUS) A sensor that measures concentrations of dissolved chemicals from their ultraviolet absorption spectrum.
Data SOCCOM Float Data An interactive map that shows current locations and trajectories of SOCCOM biogeochemical floats and provides links to real-time raw and quality-controlled float data
Data Ocean Float Data Viz Data from ISUS nitrate sensors and Deep-Sea DuraFET pH sensors in Webb Research Apex or Sea-Bird Electronics Navis profiling floats