HF RADAR - French Riviera (Mediterranean Institute of Oceanography) - daily surface currents filled with DINEOF
Daily High Frequency Radar (HFR) surface current data (radial velocity files and total velocity file) from 2 different stations located on the French Mediterranean coast (Toulon), spanning from January 2012 to December 2019.
The radial datasets have been processed to remove outliers. Then, the gaps in the data have been filled using the DINEOF algorithm. The total velocity is then reconstructed from the filled radial velocity files, and projected onto a cartesian grid of 1km x 1km.
The HFR data comes from two systems, one monostatic radar PEY (located at Fort Peyras, La Seyne sur mer), and one bistatic POB (emitter located at Cap Bénat - Bormes les Mimosas, and transmitter on Porquerolles Island). The HFR data is initially hourly sampled. To remove the outliers of the data, for each timestep, a Probability Density Function (PDF) is computed on the spatial gradient of each radial map. Pixels with a spatial gradient with a probability under 3% are removed. Additionnally, for each pixel, a PDF is computed on the temporal gradient of its whole timeseries. Timesteps with a temporal gradient that have a probability under 1% are then removed. Then we proceed to a preliminary temporal and spatial hole filling of the missing data. For the timeseries of each pixel, timesteps that are surrounded by valid values within 3 hours (i.e. 3 timesteps) are filled by a weighted linear interpolation. For each timestep, pixels of the map surrounded by values within 1 grid point are filled in the same way. The radial data is then daily averaged. The DINEOF algorithm ( http://modb.oce.ulg.ac.be/mediawiki/index.php/DINEOF) is run in a multivariate way (2 radial velocity files) using 50 EOF modes for the reconstruction. At some timesteps (shown by the flag variable of the file), the filling has not been possible, and the missing maps have been replaced by the temporal average radial map. The filled radial velocities are then locally interpolated onto a cartesian grid of 1km spatial resolution using a Weighted Least Square method.
HF radar sites :
- Peyras : 43°03'47.4"N, 5°51'40.3"E
- Porquerolles (transmitter only): 42°58'59.0"N, 6°12'15.3"E
- Bénat (receiver only): 43°05'31.5"N, 6°21'26.5"E
EUROPEAN DIRECTORY OF MARINE ENVIRONMENTAL RESEARCH PROJECTS (EDMERP) :
- SICOMAR PLUS(12402), IMPACT(12271), MOOSE(11574), and JERICO NEXT(12227)
EQUIPEMENTS:
- High Frequency Surface Wave radar WERA from HELZEL MESSTECHNIK
PARAMETERS:
- sea surface current
Citation:
Molcard, A., & Bourg, N. (2021). HF RADAR - French Riviera (Mediterranean Institute of Oceanography) - daily surface currents filled with DINEOF [Data set]. MIO UMR 7294 CNRS. https://doi.org/10.34930/9263C4DF-4F55-4C5A-B183-C40EE1D844B1
Simple
- Date (Publication)
- 2021-07-14T15:00:00
- Citation identifier
- http://dataset.osupytheas.fr/geonetwork/srv/resources7d538d6b-dd15-42af-9de7-c9eac27a840d
- Purpose
-
HF radar sea surface current daily averaged and filtered by dineof
- Status
- Historical archive
- Maintenance and update frequency
- Not planned
-
GEMET - Concepts, version 2.4
-
-
ocean
-
environment
-
geophysical environment
-
spatial distribution
-
in situ
-
data analysis
-
radar
-
- Keywords
-
-
Continents, countries, sea regions of the world.
-
-
Mediterranean Sea, Western Basin
-
Ligurian Sea
-
- Theme
-
-
sea surface current
-
- Access constraints
- License
- Use constraints
- otherRestictions
- Other constraints
-
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 : Bourg N., and Molcard A. (2021). Northern boundary Current variability and mesoscale dynamics: a
long-term HFR monitoring in the North-Western Mediterranean Sea. Ocean Dynamics, in press.
- Spatial representation type
- Text, table
- Denominator
- 5000
- Language
- English
- Character set
- UTF8
- Topic category
-
- Oceans
- Environment
- Begin date
- 2012-01-01
- End date
- 2019-12-31
- Description
-
Mediterranean Sea
- Supplemental Information
-
Toulon
- Reference system identifier
- WGS 1984
- Distribution format
-
-
relationnal database SQL
(
1.0
)
-
relationnal database SQL
(
1.0
)
- OnLine resource
-
HF radar web site (Université de Toulon)
(
WWW:LINK-1.0-http--link
)
HF radar website with visualization of near real time data
- OnLine resource
-
HF radar daily averaged and dineof filtered
(
WWW:LINK-1.0-http--samples
)
data access to the total component of sea surface current daily averaged and filtered by dineof
- OnLine resource
- Digital Object Identifier (DOI) ( DOI )
- Hierarchy level
- Dataset
- Statement
-
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.
DINEOF applied on daily radial velocity from two systems, one monostatic radar PEY, and one bistatic POB, and computation of the total vector component gridded on a 1km X 2km Cartesian regular grid.
More details of the installation 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.
Citation:
Molcard, A., & Bourg, N. (2021). HF RADAR - French Riviera (Mediterranean Institute of Oceanography) - daily surface currents filled with DINEOF [Data set]. MIO UMR 7294 CNRS. https://doi.org/10.34930/9263C4DF-4F55-4C5A-B183-C40EE1D844B1
- File identifier
- 9263c4df-4f55-4c5a-b183-c40ee1d844b1 XML
- Metadata language
- English
- Character set
- UTF8
- Hierarchy level
- Dataset
- Hierarchy level name
-
dataset
- Date stamp
- 2022-04-07T18:47:16
- Metadata standard name
-
ISO 19115:2003/19139
- Metadata standard version
-
1.0