C-RAID improve the access to historical drifter data: Copernicus Reprocessing of Argos and Iridium Drifters (C-RAID)

Date 2021-06-25
Author(s) Zunino Rodriguez PatriciaORCID3, Rannou Jean Philippe3, Poli PaulORCID2, Blanc Frédérique4, Carval ThierryORCID1, Billon Christophe2
Affiliation(s) 1 : Ifremer
2 : Meteo-France
3 : Altran
4 : CLS
DOI 10.17882/77184
Publisher SEANOE

C-RAID project is a global reprocessing of drifting buoys data and metadata.

The C-RAID dataset contains the metadata of 20.000 drifting buoys, deployed between 1979 and 2018.

The data of 10.035 drifting buoys deployed between 1997 and 2010 have been fully reprocessed and scientifically checked (delayed mode including comparison with ERA5).

The project is continuing in 2021-2022 as C-RAID phase 2 to reprocess drifting buoys data deployed between 1979 - 1996 and 2011 - 2018.

Context: The WMO DBCP Drifting Buoys GDAC (Ifremer, Meteo-France and DFO-Canada ) is dedicated to improved quality control and delivery of drifting buoy of “climate quality”  data for the Marine Climate Data System (MCDS).

Goal: clean-up an entire data archive for the past buoys deployed & reprocess the argos data & improve argos position quality (reprocessed with Kalman filter)

Lead: The C-RAID project is funded by Copernicus through a contract with the European Environment Agency. Contract # EEA/IDM/15/026/LOT1 (For Services supporting the European Environment Agency’s (EEA) implementation of cross-cutting activities for coordination of the in-situ component of the Copernicus Programme Services).

Stakeholders: DB-GDAC, Météo-France, EUMETNET (with its E-SURFMAR program), but also builds on NOAA AOML and JCOMMOPS expertise

Challenge: reprocess/recover 22,000 years of data and make them accessible

For whom? Copernicus Climate Change Service, Copernicus Marine Environment Monitoring Service, iQuam, ICOADS, GHRSST, ISPD, and ICDC.

C-RAID phase 1 deliverables

  • An improved drifting buoy data record for years 1997-2010

  • FAIR interfaces to drifting buoys data in Ifremer GDAC:

    • Web data discovery for human users

    • API data discovery/subsetting/download services (machine-to-machine data access)

What do we mean by “Improved drifting buoy data record”:

  • Missing datasets and parts of datasets recovered (data rescue)

  • Homogeneous and rich metadata and data format

  • Improved Argos locations with Kalman filter algorithm

  • Homogeneous QC and assessment on marine and atmospheric data

Licence CC-BY
User's manual

Drifting buoys dashboard API

Drifting buoys dashboard

Drifting buoys charts explorer


C-RAID drifters Quality Control Manual

C-RAID drifters NetCDF format reference manual

File Size Format Processing Access Key
13 GB NC, NetCDF Quality controlled data Access on demand 78610
C-RAID phase 2 dataset 15 GB NC, NetCDF Quality controlled data Open access 86062
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How to cite 

Zunino Rodriguez Patricia, Rannou Jean Philippe, Poli Paul, Blanc Frédérique, Carval Thierry, Billon Christophe (2021). C-RAID improve the access to historical drifter data: Copernicus Reprocessing of Argos and Iridium Drifters (C-RAID). SEANOE. https://doi.org/10.17882/77184