Development of improved space sampling strategies for ocean chemical properties: Total carbon dioxide and dissolved nitrate

Details Development of improved space sampling strategies for ocean chemical properties: Total carbon dioxide and dissolved nitrate Development of improved space sampling strategies for ocean chemical properties: Total carbon dioxide and dissolved nitrate

Apr 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995georl..22..945g&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 22, no. 8, p. 945-948

Physics

2

Carbon Dioxide, Chemical Properties, Nitrates, Oceanographic Parameters, Oceanography, Sampling, Ocean Data Acquisitions Systems, Ocean Temperature, Salinity

Scientific paper

Large-scale ocean observing programs such as the Joint Global Ocean Flux Study (JGOFS) and the World Ocean Circulation Experiment (WOCE) today, must face the problem of designing an adequate sampling strategy. For ocean chemical variables, the goals and observing technologies are quite different from ocean physical variables (temperature, salinity, pressure). We have recently acquired data on the ocean CO2 properties on WOCE cruises P16c and P17c that are sufficiently dense to test for sampling redundancy. We use linear and quadratic interpolation methods on the sampled field to investigate what is the minimum number of samples required to define the deep ocean total inorganic carbon (TCO2) field within the limits of experimental accuracy (+/- 4 micromol/kg). Within the limits of current measurements, these lines were oversampled in the deep ocean. Should the precision of the measurement be improved, then a denser sampling pattern may be desirable in the future. This approach rationalizes the efficient use of resources for field work and for estimating gridded (TCO2) fields needed to constrain geochemical models.

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