BN43A:
Biogeochemistry and Nutrients in Open-Ocean Waters: Sustainable Ocean Observations from Profiling Floats and Time Series I


Session ID#: 37568

Session Description:
Global biogeochemical cycles of carbon, oxygen, nitrogen and phosphorus, and relatedecosystem processes in the open ocean are being significantly altered by both the directand indirect impacts of human activities. To accurately observe these changes in bothupper and deep ocean waters requires sustained programs of ocean observations andtime-series efforts. These efforts include both ship based observations from repeathydrography or time-series stations, and long-term observations from profiling floats. Inparticular, the number of profiles for biogeochemical parameters returned by profiling floatsin 2016 exceeded the annual mean number of deep (>900 m) profiles entered in WorldOcean Atlas for oxygen, nitrate, or pH over the past decade by a factor of 5. For accurateglobal observations of global changes it is critically important to be able to reliably compareresults from different laboratories and from different platforms with well-quantifiedconfidence. This includes the use of Certified Reference Materials. We welcomecontributions addressing these open ocean biogeochemical observations. We are, inparticular, interested in studies that address the intercomparability of ship and autonomousplatform observations including those using global data sets such as SOCAT, GLODAP,and Biogeochemical-Argo. This includes synthesis and modelling studies of thesebiogeochemical processes.
Primary Chair:  Michio Aoyama, Japan Agency for Marine-Earth Science and Technology, Yokosuka, Japan
Co-chairs:  Kenneth S Johnson, Monterey Bay Aquarium Research Institute, Moss Landing, CA, United States, Malcolm Woodward, Plymouth Marine Laboratory, Plyymouth, United Kingdom and Herve Claustre, Laboratoire d'Océanographie de Villefranche, Villefranche-sur-Mer, France
Moderators:  Malcolm Woodward, Plymouth Marine Laboratory, Plyymouth, United Kingdom and Karin M Bjorkman, University of Hawai'i, SOEST, Honolulu, HI, United States
Student Paper Review Liaison:  Kenneth S Johnson, Monterey Bay Aquarium Research Institute, Moss Landing, CA, United States
Index Terms:

1615 Biogeochemical cycles, processes, and modeling [GLOBAL CHANGE]
1694 Instruments and techniques [GLOBAL CHANGE]
4806 Carbon cycling [OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL]
4845 Nutrients and nutrient cycling [OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL]
Cross-Topics:
  • HE - High Latitude Environments
  • IS - Ocean Observatories, Instrumentation and Sensing Technologies
  • OC - Ocean Change: Acidification and Hypoxia
  • OM - Ocean Modeling

Abstracts Submitted to this Session:

Methods for Improving the Comparability of Ocean Nutrient Measurements Using Certified Reference Materials. (316007)
Cassie Schwanger, Mark Rayner, Christine Rees, Stephen Tibben, Kendall Sherrin and Peter Hughes, CSIRO Hobart, Hobart, Australia
Present Status of Comparability of Global Nutrients data: Results of Previous Global Inter-laboratory Calibration Exercises and Comparison at Crossovers of the Global Observations (307504)
Michio Aoyama, Japan Agency for Marine-Earth Science and Technology, Yokosuka, Japan
Revisiting the stoichiometry of marine organic matter decomposition (316952)
Masahito Shigemitsu, Japan Agency for Marine-Earth Science and Technology, Research and Development Center for Global Change, Yokosuka, Japan, Michio Aoyama, Institute of Environmental Radioactivity, Fukushima University, Fukushima, Japan, Toshimasa Doi, JAMSTEC Japan Agency for Marine-Earth Science and Technology, Kanagawa, Japan, Taichi Yokokawa, Japan Agency for Marine-Earth Science and Technology, Yokosuka, Kanagawa, Japan and Akihiko Murata, Japan Agency for Marine-Earth Science and Technology, Research & Development Center for Global Change, Yokosuka, Japan
A time series of surface temperature, salinity, inorganic carbon and nutrients and isotopic measurements in the North Atlantic subpolar gyre since 1993 (321115)
Gilles P Reverdin, Sorbonne-Universités, LOCEAN, CNRS/IRD/UPMC/MNHN, Paris, France, Nicolas Metzl, Sorbonne Universités (UPMC, Univ Paris 06), Paris, France, Virginie Racapé, IFREMER, LOPS, Plouzane, France, Solveig Olafsdottir, Marine and Freshwater Research Institute, Oceanography, Reykjavik, Iceland and Taro Takahashi, Columbia Univ, Palisades, NY, United States
What Drives the Latitudinal Gradient in Open Ocean Surface Dissolved Inorganic Carbon Concentration? (302815)
Yingxu Wu1, Toby Tyrrell2, Mathis Hain1, Matthew Paul Humphreys2 and Susan Elizabeth Hartman3, (1)University of Southampton, Southampton, United Kingdom, (2)University of Southampton, Ocean and Earth Science, Southampton, United Kingdom, (3)National Oceanography Center Southampton, Southampton, United Kingdom

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