HF radar monthly averaged surface currents from MEDTLN site (Toulon NW Med)
In the framework of the SNO/SOERE MOOSE (Mediterranean Ocean Observing System on Environment https://www.ir-ilico.fr/Les-reseaux-elementaires/Fiches-d-identite-des-reseaux-elementaires/MOOSE ) program, the Mediterranean Institute of Oceanography is operating coastal High Frequency Surface Wave Radars (HF radar) on the North Western Mediterranean coast. This activity is also supported by the following European Research Infrastructure Jerico-Next ( https://www.jerico-ri.eu), and Intereg MED programs as Impact and Sicomar +.
HF radar provide high resolution (3-5 km), synoptic view of surface currents from the shore up to 80 km off shore at hourly time scales. The measurement principle is based on the Doppler effect created by an additional current on the intrinsic speed of the waves selected by radar-sea interactions, called Bragg waves, having a wavelength of half that of the radar e.m. waves and propagating in the axis of observation (radial currents). A single radar scans the sea in azimuth and determines the radial components of the current at each adjacent cell along each azimuth. Two separate radars for the same area from different angles then collect the information necessary for mapping vector current from the combination of the two sets of radial components.
The HF radar data set is made of monthly averaged surface currents, geo-referenced on cartesian lon/lat coordinates. The radial velocities maps are provided applying a Direction Finding technique (instead of traditional Beam Forming) not only to the full array of antenna but also to subarrays made of a smaller number of sequential antennas, a method which we refer to as "antenna grouping". Radials from Peyras-Peyras and Porquerolles-Benat are computed to reconstruct the vector field.
Simple
- Date (Publication)
- 2020-06-10T00:00:00
- Purpose
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HF radars are particularly suitable platforms to monitor the variability in semi enclosed seas. They provide 2-D synoptic maps of surface currents for distances up to 100 km offshore over a wide variety of high spatial (2-3 km) and temporal (usually 1-hour averages) scales, enabling the thorough scientific knowledge of small and meso-scales coastal processes. Additionally, HF radar data are also being used for a broad range of science-based societal applications such as, maritime safety, tracking of marine pollutants, water quality monitoring, energy production, fisheries and coastal (e.g. port activity and impact on Marine Protected Areas) management and improvement of numerical circulation models through validation and data assimilation.
- Status
- Historical archive
- Maintenance and update frequency
- Not planned
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GEMET - Concepts, version 2.4
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radar
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ocean current
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GEMET - INSPIRE themes, version 1.0
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Sea regions
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Continents, countries, sea regions of the world.
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France
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Mediterranean Sea
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- Access constraints
- Copyright
- Use constraints
- otherRestictions
- Other constraints
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https://creativecommons.org/licenses/by-nc/4.0/
In addition to properly cite this dataset, it would be appreciated that the following work(s) be cited too, when using this dataset in a publication :
Dylan Dumas, Charles-Antoine Guerin, "Self-calibration and antenna grouping for bistatic oceanographic High-Frequency Radars", 2020, https://arxiv.org/abs/2005.10528
- Spatial representation type
- Vector
- Denominator
- 5000
- Language
- English
- Character set
- UTF8
- Topic category
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- Oceans
- Environment
- Begin date
- 2012-06-01
- End date
- 2019-10-31
- Description
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Mediterranean Sea
- Reference system identifier
- WGS 1984
- Distribution format
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fichiers NetCDF
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1.0
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fichiers NetCDF
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1.0
)
- OnLine resource
- HF RADAR MIO - Université de Toulon ( WWW:LINK-1.0-http--link )
- OnLine resource
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Data access by NC files
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WWW:LINK-1.0-http--samples
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HF radar monthly averaged surface currents
- Hierarchy level
- Dataset
- Statement
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WERA (Wellen Radar - Helzel Messtechnik GmbH) operated at 16.1-16.2 MHz with 50 kHz bandwidth (3km range resolution) and 8 receiving antennas from 2011 to 2018 on each sites and upgraded to 12 receiving antenna on Benat in 2018 with a better resolution of 1.5 km with 100 KHz of bandwidth.
Radial velocities maps are performed using MUSIC Direction Finding (2° azimuthal resolution) in monostatic (Peyras site) and bistatic (Benat-Porquerolles site) configuration. Vector component gridded on a 2km X 2km Cartesian regular grid.
More details of the intallation and acquisition protocols can be found on the real-time dedicated web site http://hfradar.univ-tln.fr/ and in Quentin et al. 2014.7th EuroGOOS Conference Proceedings, Oct 2014, Lisboa, Portugal Buch E, Antoniou Y, Eparkhina D, Nolan G (Eds.) ISBN 978-2-9601883-1-8, pp 111-118.
- File identifier
- 754d91b6-14f4-4c60-95dd-9bafb3d0591a XML
- Metadata language
- English
- Character set
- UTF8
- Hierarchy level
- Dataset
- Hierarchy level name
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dataset
- Date stamp
- 2022-10-06T14:19:13
- Metadata standard name
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ISO 19115:2003/19139
- Metadata standard version
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1.0