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OAS accession Detail for 0092291
| << previous | |revision: 10 |
| accessions_id: | 0092291 | archive |
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| Title: | Documentation for University of Washington Seaglider records archived at NCEI (NCEI Accession 0092291) |
| Abstract: | Seagliders are small (1.8m hull), reusable, long-range, and buoyancy-driven autonomous underwater vehicles (AUVs) designed to glide from the ocean surface to as deep as 1-km depth and back while collecting profiles of temperature, conductivity (hence salinity), dissolved oxygen, chlorophyll fluorescence, and optical backscatter at varying vertical resolutions. Seagliders collect measurements along saw-tooth paths with a slope of 1:1-3.5 through the ocean at speeds through the water of about 20 cm/s. They are commanded remotely and report their data in near-real time via Iridium satellite data telemetry. They use GPS navigation at sea surface to dead reckon underwater toward commanded targets. Differences between dead-reckoned and actual displacements permit estimation of the depth-averaged horizontal velocity. Estimates of geostrophic or cyclostrophic shear can be integrated vertically and referenced to the depth-averaged current to obtain sections of absolute geostrophic current with typical errors of the order of 0.01 m/s. The difference between observed and expected descent rate gives a profile of vertical velocity, showing internal wave and turbulent deep mixing activity. |
| Date received: | 20120627 |
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| Observation types: | documentation only - no observation type |
| Instrument types: | documentation only - no instrument type |
| Datatypes: | documentation only - no data type |
| Submitter: | Eriksen, Charles |
| Submitting institution: | University of Washington |
| Collecting institutions: | University of Washington |
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| Metadata version: | 10 |
| Keydate: | 2012-07-02 09:46:33+00 |
| Editdate: | 2025-04-17 18:26:12+00 |