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Discussion papers
https://doi.org/10.5194/essd-2018-136
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/essd-2018-136
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Brief communication 14 Nov 2018

Brief communication | 14 Nov 2018

Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Earth System Science Data (ESSD).

A comprehensive global oceanic dataset of helium isotope and tritium measurements

William J. Jenkins1, Scott C. Doney1,a, Michaela Fendrock1, Rana Fine2, Toshitaka Gamo3, Philippe Jean-Baptiste4, Robert Key5, Birgit Klein6, John E. Lupton7, Monika Rhein8, Wolfgang Roether8, Yuji Sano3, Reiner Schlitzer9, Peter Schlosser10, and Jim Swift11 William J. Jenkins et al.
  • 1Woods Hole Oceanographic Institution, Woods Hole, MA 02543, USA
  • 2RSMAS, University of Miami, Miami. FL 33149, USA
  • 3Atmosphere and Ocean Research Institute, The University of Tokyo, Kashiwa, Chiba 277-8564, Japan
  • 4LSCE, CEA-CNRS-UVSQ, CEA/Saclay, 91191 Gif-sur-Yvette cedex, France
  • 5Princeton University, Princeton, New Jersey, USA
  • 6BSH, 20359 Hamburg, Germany
  • 7NOAA Pacific Marine Environmental Laboratory, Newport, Oregon, USA
  • 8IUP, University Bremen, D28359 Bremen, Germany
  • 9Alfred Wegener Institute, 27568 Bremerhave, Germany
  • 10LDEO, Columbia University, Palisades, NY, USA
  • 11SIO, University of California San Diego, La Jolla, CA, USA
  • anow at: University of Virginia, Charlottesville, VA 22904, USA

Abstract. Tritium and helium isotope data provide key information on ocean circulation, ventilation, and mixing, as well as the rates of biogeochemical processes, and deep-ocean hydrothermal processes. We present here global oceanic datasets of tritium and helium isotope measurements made by numerous researchers and laboratories over a period exceeding 60 years. The dataset has a DOI:10.25921/c1sn-9631 and is available at https://www.nodc.noaa.gov/ocads/data/0176626.xml, and includes approximately 60,000 valid tritium measurements, 63,000 valid helium isotope determinations, 57,000 dissolved helium concentrations, and 34,000 dissolved neon concentrations. Some quality control has been applied in that questionable data have been flagged and clearly compromised data excluded entirely. Appropriate metadata has been included, including geographic location, date, and sample depth When available, we include water temperature, salinity, and dissolved oxygen. Data quality flags and data originator information (including methodology) are also included. This paper provides an introduction to the dataset along with some discussion of its broader qualities and graphics.

William J. Jenkins et al.
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William J. Jenkins et al.
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A comprehensive global oceanic dataset of discrete measurements of helium isotope and tritium during the hydrographic cruises on various ships from 1952-10-21 to 2016-01-22 (NCEI Accession 0176626) W. J. Jenkins, S. C. Doney, M. Fendrock, R. Fine, and R. Key https://doi.org/10.25921/c1sn-9631

William J. Jenkins et al.
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Short summary
This paper describes an assembled data set containing measurements certain trace substances in the ocean, their distributions and evolution with time. These substances, called tracers result from a combination of natural and artificial processes, and their distribution and evolution provide important clues about ocean circulation, mixing, and ventilation. In addition, they give information about the global hydrologic cycle and volcanic/hydrothermal processes.
This paper describes an assembled data set containing measurements certain trace substances in...
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