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Regional oceanography for PSAL DMQC

Regional oceanography for PSAL DMQC. Some examples of OW in the Pacific T.Nakamura JAMSTEC. Preliminary experiment of new DMQC tool & Ref.DB. Because of time shortage, this experiment was executed only by the pair of latest version OW and Coriolis Ref.DB. V0801. It is not compared with WJO.

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Regional oceanography for PSAL DMQC

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  1. Regional oceanographyfor PSAL DMQC Some examples of OW in the Pacific T.Nakamura JAMSTEC

  2. Preliminary experiment of new DMQC tool & Ref.DB. • Because of time shortage, this experiment was executed only by the pair of latest version OW and Coriolis Ref.DB. V0801. It is not compared with WJO. • A changeable parameter is only a horizontal map scale and PV in this experiment. All other parameters were set to default.

  3. Preliminary result of the latest OW Experimented area ; (Western North Pacific, 140E-180) • 1. subarctic • 2. subtropical • 3. equatorial 1 2 3

  4. 1. subarctic • 2900418

  5. Subarctic Pacific • When the map scale is reduced to the half, the frequency of the change in the correction ratio grows, and the correction result looks more unstable than default. • The change of PV to effective was not as large as it influenced the correction result in many cases.

  6. Subtropical gyre • 2900471

  7. subtropical gyre • The result of changing the map scale into the half is not greatly different from default. • However, when a float is near the boundary with the subarctic, reducing the map scale contributes with stability of the correction ratio and decrease of the error. • The influence on the result by the presence of PV is small, and there might be a difference when the map scale is reduced.

  8. tropical 5901210

  9. tropical Outline of result • When the map scale is made a half, some amplitudes of the change in the correction ratio become small. However, the tendency to the temporal alteration is almost the same. • In all examples, the difference by the presence of PV is hardly seen. (Because of 1500dbar deepest pressure? )

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