Details of Collocations of surface drifter and GlobCurrent (centered five-day) 15-m zonal and meridional velocity estimates

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Dataset identification

Title of datasetCollocations of surface drifter and GlobCurrent (centered five-day) 15-m zonal and meridional velocity estimates
Narrative summary of datasetGlobCurrent is an analysis that linearly combines the geostrophic and Ekman components. Drifters respond locally to a combination of geostrophic, Ekman, tidal, inertial, Stokes, and wind drift processes, including processes on scales smaller and faster than the GlobCurrent grid can resolve. Collocations of drifters (whose drogues move roughly with the 15-m current) and GlobCurrent (also at 15 m, with additional samples at daily intervals from two days before to two days after collocation) are included in this dataset. Six-hourly drifter velocity has been estimated following Hansen and Poulain (1996). We restrict attention to drifters whose continuous drogue presence was confirmed by objective or subjective means (Rio et al. 2012, Lumpkin et al. 2013). The resulting geographic distribution for 1993-2015 (Fig. 1) yields more than eleven million drifter and GlobCurrent zonal and meridional velocity estimates. (A comparable number of drifters lost their drogues and, being more responsive to surface wind forcing, are omitted.)
Summary of processing methodologyGlobCurrent is an analysis that linearly combines the geostrophic and Ekman components. Drifters respond locally to a combination of geostrophic, Ekman, tidal, inertial, Stokes, and wind drift processes, including processes on scales smaller and faster than the GlobCurrent grid can resolve. Collocations of drifters (whose drogues move roughly with the 15-m current) and GlobCurrent (also at 15 m, with additional samples at daily intervals from two days before to two days after collocation) are included in this dataset. Six-hourly drifter velocity has been estimated following Hansen and Poulain (1996). We restrict attention to drifters whose continuous drogue presence was confirmed by objective or subjective means (Rio et al. 2012, Lumpkin et al. 2013). The resulting geographic distribution for 1993-2015 (Fig. 1) yields more than eleven million drifter and GlobCurrent zonal and meridional velocity estimates. (A comparable number of drifters lost their drogues and, being more responsive to surface wind forcing, are omitted.)
Supporting documentationHow to cite: Rick Danielson (2017). Collocations of surface drifter and GlobCurrent (centered five-day) 15-m zonal and meridional velocity estimates. SEANOE. https://doi.org/10.17882/50225
https://agupubs.onlinelibrary.wiley.com/doi/full/10.1002/2014GL061773
https://journals.ametsoc.org/view/journals/atot/30/2/jtech-d-12-00139_1.xml
Start date1993-01-08
End date2015-12-29

Responsible organisations

CountryFrance
Organisation nameIfremer Head Office
Role of organisationDataset Holding Organisation
CountryFrance
Organisation nameSEA scieNtific Open data Edition
Role of organisationPublisher

Dataset availability

Original dataset download linkhttps://cloud.emodnet-ingestion.eu/index.php/s/1zJrndMAzEIyWAb
Dataset formatText or Plaintext
Public accessNo limitations
License for useCC-BY 4.0
TypeDataset
DOIhttps://doi.org/10.17882/50225

Locations

Map
Latitude north boundary80
Longitude east boundary180
Latitude south boundary-70
Longitude west boundary-180

Data types, collection and processing

Observation typeOther physical oceanographic measurements
Currents
ParameterHorizontal velocity of the water column (currents)
Instrument typecurrent meters
Platform typedrifting surface float

Process information

Submitting organisationNansen Environmental and Remote Sensing Center
Submission identifier (UUID)512eb181-6a51-4e65-bfdb-092733fbb924
Date of dataset creation2017-07-07
Date of metadata creation2019-05-16
Date of metadata latest revision2021-11-29
Date of publishing2021-12-16
Processing data centreIfremer, Scientific Information Systems for the sea
Summary record-ID975