Temporal Sampling Requirements for Surface Drifting Buoys in the Tropical Pacific

Hansen, Donald V.; Herman, Alan

doi:10.1175/1520-0426(1989)006<0599:tsrfsd>2.0.co;2

Cited by 39 publications

(27 citation statements)

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“…Drifters were drogued at 15 m below the surface float and were tracked by satellite positioning. Drifter details, processing, and quality control at AOML are described in Hansen and Herman (1989) and Hansen and Poulain (1996).…”

Section: E ''Ovide'' Ship Sectionsmentioning

confidence: 99%

Observations of Irminger Sea Anticyclonic Eddies

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et al. 2013

Journal of Physical Oceanography

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Section: E ''Ovide'' Ship Sectionsmentioning

confidence: 99%

Observations of Irminger Sea Anticyclonic Eddies

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Journal of Physical Oceanography

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“…The modern dataset of the SVP drifters, including all drifters deployed since 1979 with a holey-sock drogue centered at 15-m depth, is known collectively as the Global Drifter Program (GDP). The raw fixes of drifter positions are inferred from the Doppler shift of their transmission, and then interpolated to uniform 6-h intervals using an optimal procedure known as kriging interpolation (Hansen and Herman 1989;Hansen and Poulain 1996).…”

Section: A Drifter Datasetmentioning

confidence: 99%

Eulerian and Lagrangian Statistics in the South China Sea as Deduced from Surface Drifters

Qian

Peng

2013

Journal of Physical Oceanography

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Eulerian and Lagrangian statistics of the surface flows over the South China Sea (SCS) are investigated based on observations of satellite-tracked Lagrangian drifters of the Surface Velocity Program. Although the dataset contains the most recent observations up to 2011, the spatial and temporal distributions of the data are quite inhomogeneous. The Luzon Strait as well as the northern and western parts of the SCS are heavily sampled by drifters whereas the internal SCS is less sampled. The overall Eulerian mean circulation derived from all drifter observations resembles the wintertime circulations because of the seasonal sampling bias toward wintertime. It is found that the calculation of the diffusivity may be misled by the low-frequency temporal variabilities such as annual cycle, which could be removed using the Gauss-Markov decomposition. In the regions around Luzon Strait, typical values of diffusivity, time scale, and length scale are 3.7-11.9 3 10 7 cm 2 s 21 , 0.8-1.9 days, and 16.4-44.4 km, respectively. In the regions around Hainan Island and the western boundary of the SCS, the typical estimated diffusivity and length scale are slightly smaller, that is, 2.3-6.9 3 10 7 cm 2 s 21 and 12.8-33.7 km while the time scale (0.8-2.0 days) is approximately the same as that in the regions around Luzon Strait. Although these regions are close to the coast, the ''flux versus gradient'' relationship is still valid in these coastal regions.

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“…The raw fixes are interpolated to uniform 6-h intervals using an optimal interpolation procedure known as kriging (Hansen and Herman, 1989;Hansen and Poulain, 1996). Latitude and longitude (and SST) are interpolated independently.…”

Section: B Interpolationmentioning

confidence: 99%