Activity report Data Terra 2017 – 2020
(pdf - 1 Mo)
El Niño phenomenon in November 2015
Sea level anomalies measured by altimetry satellites, showing positive sea level anomalies in red, indicating a strong El Niño event. Altimetry satellites allow to follow the evolution of the El Niño phenomenon and to measure its level: as early as April 2015, sea level maps show large areas with positive anomalies in the equatorial Pacific of more than 20 centimeters above average. At that same time, surface temperatures were also warmer than normal. During the summer of 2015, this warm water extends into the east-central Pacific Ocean. These temperature and sea level anomalies result in significant heat energy transfers between the ocean and atmosphere, and affect the climate of the entire planet. Credits CMEMS / Ssalto/Duacs / AVISO+.
Modeling of dispersing and converging particle trajectories simulating floating material at the ocean surface. This model assimilates 29 years [1985-2013] of surface (or sub-surface, at ~0.5 m depth) current data from a reanalysis combining both in situ and satellite observations and takes into account atmospheric forcing via atmospheric reanalyses. A Lagrangian analysis then allows to follow in time the particles along their trajectory, by horizontal advection, under the effect of these currents. Convergence zones within oceanic gyres are observed. Credits C.Maes, Geophysical Research Letters.
Crew of the FUMSECK sea campaign, in 2019, in the Mediterranean
Scientific team and crew of the oceanographic vessel Téthys II, back in the port of La Seyne-sur-Mer at the end of the FUMSECK campaign in May 2019. Its objective is to carry out technological tests, at different levels, of the instruments used to study the processes and three-dimensional dynamics of fine-scale currents (from 0.1 to 100 km for a lifetime of a few days to a few weeks). Credit MIO, Mediterranean Institute of Oceanology.
Waves and temperature during the passage of Hurricane Dorian in September 2019 in the Bahamas
Significant wave height measurements along the track of the Copernicus Sentinel-3A and Sentinel-3B missions superimposed on the surface temperature of the SLSTR IR instruments on 02/09/2019 during the passage of Hurricane Dorian, which severely affected several islands in the Bahamas. These figures are obtained from the S3View visualization tool, developed by OceanDataLab, for ESA.
Cartographic interface of the ODATIS catalog with the route of oceanographic vessels
Currentometry data measured continuously by a hull ADCP (Acoustic Doppler Current Profiler) along the trajectories of oceanographic vessels from IFREMER, Shom and IRD. The data are controlled and validated by the CDS-IS-SISMER of the ODATIS ocean pole. These data are visible from the ODATIS catalog through this interactive interface. Credits ODATIS/SEXTANT
Oxygen Minimum Zones (OMZ); in red, coastal sites where nutrient loading has caused oxygen content to decline to concentrations < 2 mg/l and, in blue, oxygen minimum zones at 300 m depth. The oxygen cycle in the oceans provides half of the available air supply to all aerobic organisms on our planet. In the ocean, the sources that produce oxygen are mostly represented by phytoplankton and photosynthetic bacteria like cyanobacteria. Through this photosynthetic mechanism, the oxygen cycle interacts with the carbon cycle. Credit: illustration adapted from the GO2NE working group. Data from World Ocean Atlas 2013 and provided by R. J. Diaz.
Carte de courants de marée de la zone "Rade de Brest - Iroise" issue de l’exploitation d'un modèle hydrodynamique haute résolution en 3 dimensions et représentant les courants de marée pour trois immersions (surface, mi-profondeur, fond), sur un cycle de marée échantillonné toutes les heures. Ce jeu de données est proposé par le CDS-IS-Shom du pôle océan ODATIS. Crédits Shom
The RadeZOO collections are preserved at the IMEV (Institut de la Mer de Villefranche-sur-Mer) which is one of the data and services center of the ODATIS ocean cluster and constitutes one of the largest zooplankton image databases. Abundance, size and biomass of zooplankton are estimated after collection by surface-bottom nets and processing of the samples by different high-throughput imaging instruments. Credits IMEV.
Over past years CNRM has developed with support from AERIS/ICARE the AERUS-GEO suite of Aerosols and Surface properties products (https://www.icare.univ-lille.fr/projects/user-driven-projects/aerus-geo/).
Initially aimed at providing a daily averaged Aerosol Optical Depth (AOD) from SEVIRI sensors aboard the MSG satelliteseries, the project is now about to provide retrievals of aerosol properties at 15-min intervals thanks to the new i-AERUS-GEO algorithm (currently under validation).
Also, thanks to the GEO archive maintained at AERIS/ICARE we are currently developing a full GEO-ring AERUS-GEO product whereby merging the observations of imagers on five geostationary platforms (MSG-0°, MSG-41,5°E, HIMAWARI, GOES-E and GOES-W) we can derive aerosol properties over the quasi-global zone covered by meteorological operational geostationary satellites.
We present here a first snapshot of the product currently under development. The image below illustrates the five GEO imagers used for the product and presents the daily average AOD obtained for August 31, 2020 superimposed on a false color composite image derived from the surface albedo derived by AERUS-GEO for the corresponding period.
IAGOS is an Observation Service labelled by CNRS-INSU since 1994 and a CNRS Research Infrastructure since 2009. IAGOS is the continuation of the MOZAIC program (Measurements of OZone, water vapour, carbon monoxide and nitrogen oxides by in-service AIrbus airCraft) and integrates the observations of the CARIBIC (Global Atmospheric Composition and Climate Change Research) project.
IASI, un allié spatial pour étudier atmosphère, météo et climat – AERIS
Since 2006, the IASI infrared spectrometer has been installed on several weather satellites orbiting the Earth. By receiving the infrared radiation emitted by our planet after it passes through the atmosphere, it allows scientists to deduce the characteristics and composition of the atmosphere over the entire globe. These data are used to improve weather forecasts, study climate change, analyze the effectiveness of regulations aimed at limiting it, and identify certain events such as volcanic eruptions or forest fires. The fifth IASI conference, which takes place from December 6 to 10, 2021, allows scientists to share and discuss the latest results obtained with this instrument.
IASI+GOME2: production of ozone data from multi-spectral observations
Level 2 ozone data from IASI + GOME2 multi-spectral observations are produced on a continuous basis by the AERIS/ESPRI Data and Services Center. The data files will be made available daily in NetCDF format; they will provide vertical ozone profiles from the surface to more than 60 km altitude, partial ozone columns (including the lower troposphere), averaging kernels, error estimates, temperature and pressure profiles, surface temperature, cloud fractions and quality flags.
Calipso is a cooperative Earth science mission between NASA and CNES dedicated to measuring the vertical distributions as well as the optical and physical properties of aerosols and clouds in the atmosphere, which influence the Earth's radiation budget. To do this, it combines information provided by an active lidar with passive imagers in the infrared and visible domains.
The Calipso satellite was put into orbit, at the same time as Cloudsat, in April 2006 for an initial duration of 3 years but, given its good performance, its mission has been extended in several stages until 2022.
This activity report was associated with the 2021 questionnaire to be completed for the updated research infrastructure roadmap.
Data Terra is a research infrastructure (RI) dedicated to Earth system data, founded in 2016 and part of the 2019-2021 national roadmap. Its annual full mean cost is €40 million and it mobilizes more than 160 FTEs, spread across a cadre of more than 400 people from 30 partner organizations and universities.
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