AVISO Climate Change News

Syndicate content AVISO: Rss Feeds
Live from Aviso Website
Updated: 17 hours 10 min ago

December 2018: Retrieving hidden water contribution to river from space

Mon, 2018-12-03 01:53
The minimum flow a river can have can be estimated using the overall discharge. This is one of Swot...
Categories: Climate Science News

12 - 24 November 2018 weeks

Tue, 2018-11-27 09:43
How the Antarctic Circumpolar Current Helps Keep Antarctica Frozen (The Marine Executive, 24/11/2018) Beneath Antarctica’s Ice Is a Graveyard of Dead Continents (The New York Times, 23/11/2018) What a sinking island can tell us about sea-level change and earthquakes (Phys.org, 21/11/2018) How rare are November hurricanes? (EarthSky, 20/11/2018) The Earth Is Eating Its Own Oceans (Live science, 14/11/2018) Why Is the Gulf of Maine Warming Faster Than 99% of the Ocean? (EOS, 12/11/2018) Le réchauffement climatique menace l'humanité de... 467 façons ! (Sciences et Avenir, 22/11/2018) Les niveaux de gaz à effet de serre atteignent un nouveau record dans l'atmosphère (France Info, 22/11/2018) Un cachalot retrouvé mort avec 6 kg de plastique dans le ventre en Indonésie (Ouest France, 21/11/2018) Deux projets fous contre la montée des eaux (Science & Vie, 21/11/2018) Afrique : au Sahel, pas de retour à la normale après la "grande sécheresse" (L'Obs, 13/11/2018) Climat : à quoi servent les COP ? (Geo, 12/11/2018) On line availability of articles depends on the Newspaper/magazine. We can't thus certify that above articles will be freely and permanently available.
Categories: Climate Science News

29 October - 12 November 2018 weeks

Mon, 2018-11-12 08:32
Hurricane Season Is Almost Over - So Why Are Meteorologists Watching The Caribbean? (Forbes, 11/11/2018) NASA IceBridge Flight Spots Massive Antarctic Iceberg B-46 (SciTechDaily, 11/11/2018) Still waiting on El Niño for winter 2018 (Surfline, 10/11/2018) An ice age lasting 115,000 years in two minutes (Phys.org, 06/11/2018) GRACE-FO resumes data collection (Space Daily, 05/11/2018) Deep Floats Reveal Complex Ocean Circulation Patterns (EOS, 05/11/2018) Sea level rise forcing Bangladeshis to migrate (SciDevNet, 30/10/2018) How the Greenland ice sheet fared in 2018 (Phys.org, 29/10/2018) La subida del nivel del mar se está acelerando (Tiempo.com, 12/11/2018) Réchauffement climatique dans les Pyrénées : +1,2 degré en 50 ans ! Alerte rouge pour le massif (, 12/11/2018) Des images satellite révèlent des vestiges anciens sous les glaces antarctiques (Sputnik, 10/11/2018) Une île a mystérieusement disparu au Japon (Paris Match, 02/11/2018) Méditerranée : la quasi-totalité des sites Unesco menacés par le réchauffement climatique (Futura Sciences, 29/10/2018) On line availability of articles depends on the Newspaper/magazine. We can't thus certify that above articles will be freely and permanently available.
Categories: Climate Science News

CFOSAT: first results

Fri, 2018-11-09 09:56
The French-Chinese satellite CFOSAT was successfully launched on October 29th (see our dedicated news). On November 1st, the French SWIM instrument has been switched on, its rotating antenna system has been released and activated. The SWIM status is nominal with great results for the first products evidencing SWIM perfect behaviour.  The CNES processing chain in near-real time is enable to generate product levels-1 & 2. A comparison between the Significant Wave Height from SWIM instrument and ECMWF forecast shows good fitting on oceanic structures.


The commissioning phase is starting with these promising results. In the coming weeks, calibration works will be perform at instrument level, before the data are made available for scientific experts during the Calibration/Validation phase.

On the Chinese side, the rotating fan beam scatterometer SCAT dedicated to the ocean surface wind measurements is also operational and works properly.

Further information:
  • Missions: CFOSAT
  • CNES presentation : SWIM first days results in science modes - 03/11/2018
Categories: Climate Science News

November 2018: Simulating the North Atlantic ocean turbulence at a kilometer-scale

Wed, 2018-10-31 11:00
To achieve a better understanding of submesoscale turbulence contribution in global ocean...
Categories: Climate Science News

CFOSAT: successful launch

Mon, 2018-10-29 08:25

Click on the image above to access to the video of the CFOSAT launch. Credits CNSA.

Further information
  • CFOSAT: Missions
  • CNES website: France-China space cooperation - CFOSAT in orbit
Categories: Climate Science News

15 - 29 October 2018 weeks

Mon, 2018-10-29 03:40
France-China space cooperation - CFOSat in orbit (CNES, 29/10/2018) Long March 2C lofts CFOSAT for CNES (Nasa spaceflight, 28/10/2018) El Nino alert gives first indications for Christmas weather (News.com, 25/10/2018) Polar Researchers Spot Two Rectangular Icebergs (Universe Today, 24/10/2018) State of the climate: New record ocean heat content and a growing El Niño (Carbon Brief, 23/10/2018) Mad scientists flip the Earth’s spin in climate models, watch water go nuts (Ars Technica, 17/10/2018) Climat : lancement "historique" ce lundi matin d'un satellite franco-chinois (Midi Libre, 29/10/2018) Les micro-algues, ce côté toxique du poumon de la planète (Sciences et Avenir, 25/10/2018) Méditerranée : 5 actions clé pour sauver notre mer (Futura Sciences, 24/10/2018) Réchauffement: et si le climat basculait? (L'Express, 21/10/2018) On line availability of articles depends on the Newspaper/magazine. We can't thus certify that above articles will be freely and permanently available.
Categories: Climate Science News

Data delivery on the CNES FTP Server delayed

Fri, 2018-10-26 07:02
Please be informed that due to a hard failure impacting the Cnes/Ssalto echanges, the data delivery on the CNES FTP server may be affected. Actions are on going to resume to nominal situation. We apologize for the inconvenience
Categories: Climate Science News

CFOSAT: D-4 before the launch !

Fri, 2018-10-26 00:30
The launch countdown is becoming clear at the Jiuquan Space Launch Center in China, with the Long March 2C rocket preparing for liftoff. Next Monday, 29th October 2018, the CFOSAT satellite will reach its sun-synchronous orbit at 520 km altitude. CFOSAT studies ocean surface winds and waves with a view to improving sea-state forecasts and gaining new insights into ocean-atmosphere interactions. Calibration/Validation and data processing after the launch

After about one month during the Commissioning Phase, the data will be available for scientific expert during the Calibration/Validation phase (represented in France by LATMOS, LOPS and marine forecasters and oceanographers at Météo-France). After 6-7 months, the data will be accessible to the entire scientific community. 

Chinese or French, each mission centre generates user products through two processing chains : one for SWIM data, the other for SCAT data. Each country designed and developed the scientific algorithms for its own intrument, capable of extracting physical values from the raw telemetry. Each then delivered its processing chain to the other partner for integration into the latter's operational mission centre.

The French Mission Centre supplies weather agencies with Level-1 and Level-2 products for marine weather forecasts in less than  3 hours. For other applications, France and China offer Level-3 and Level-4 value-added products.

These will be developed over longer timescales and incorporate external data, for use in research into subjects as ocean/atmosphere exchanges.

Thematic posters of CFOSAT. Credits CNES, CNSA. All posters on this page.

Further information: 
  • CFOSAT, all news about the launch:
    • 2018/10/19: What happens before the launch in 10 days?
    • 2018/10/11 : pre-launch workshop
    • 2018/10/14 : launch foreseen on October 29th, 2018
  • CFOSAT: Missions
  • Press release from CNES and CNRS (in french): Le CNES et le CNRS unissent leur expertise pour l’étude du changement climatique sur les océans
Categories: Climate Science News

[Jason-2] Jason-2 is back to nominal

Thu, 2018-10-25 05:08
Today, October 25th, during last Usingen pass, all core-mission instruments have been restarted :
  • POSEIDON at 09:08:05UTC
  • AMR at 09:09:57UTC
  • GPSP at 09:12:48UTC
Jason-2 mission is then back to nominal activities at the end of cycle 609, after approximately 7 days of unavailability. The first telemetry will be available around 11:30UTC, right after the coming pass.
Categories: Climate Science News

[Jason 2] Jason 2 in Safe Hold Mode on October 19th at 11:41:34UTC

Sun, 2018-10-21 23:29
On October 19th 2018 at 11:41:34UTC, Jason-2 entered in Safe Hold Mode due to the (now usual and expected) disjunction anomaly on Gyro 2. At that time, another anomaly, due to the corruption of the mass memory onboard was already preventing any products generation since October 18th around 11:11UTC. This memory corruption anomaly has no direct link with the gyro disjunction. Next week, investigations on the corruption anomaly will be carried on, and the SHM recovery schedule will be decided accordingly.  Operational teams are currently doing their best to recover the mission as soon as possible.
Categories: Climate Science News

CFOSAT : what happens before the launch in 10 days?

Fri, 2018-10-19 07:01
In the framework of a cooperation between CNES and CNSA, the CFOSAT satellite will be launched on the 29th of October, 2018 from China using a Long March-2C launch vehicle. Ten days before the launch, all operations are nominal at the Jiuquan Space Launch Center: filling of the satellite hydrazine tank and their pressurization, detection of the possibility of leaks, battery charching, tests on the platform, SCAT and SWIM, process of finalization on the thermal protections on the satellite and SWIM instrument, solar panel manual deployment. The operations with the launcher will be pursue until the launch : encapsulation of the satellite into the payload fairing, connection with the launch vehicle, battery charging. Further information:
  • Missions: CFOSAT
Categories: Climate Science News

CFOSAT: pre-launch workshop

Thu, 2018-10-11 06:14
This workshop was co-organized by CNES, CNRS, LATMOS, LOPS and IUEM with a wide participation of about 60 scientists : Chinese-French scientific community and for the first time, a significant number of foreign scientists coming worldwide. They showed a keen interest in future data and their applications. This workshop is undoubtedly the beginning of the scientists CALVAL operations in preparation to future data exploitation.

The main topics of the workshop were on:

  • CFOSAT data processing methods,
  • preparation of the geophysical CAL/VAL (calibration/validation) activity,
  • combined use of SWIM and SCAT observations,
  • scientific studies based on CFOSAT products,
  • synergetic use of CFOSAT products and data from other missions and sensors,
  • data assimilation in numerical models, operational model validation,
  • links with future satellite missions.
CFOSAT is an innovative satellite mission, which will carry two radar instruments (SWIM and SCAT). It will be launched on October 29th, 2018. CFOSAT studies ocean surface winds and waves with a view to improving sea-state forecasts and gaining new insights into ocean-atmosphere interactions. Thanks to the new types of observations that it will provide (directional wave spectra), it will also be a key element to prepare future oceanographic satellite missions such as those devoted to surface current measurements. CFOSAT is developed and will be exploited under a Chinese-French cooperation as agreed through the Chinese-French Memorendum of Understanding (MOU). More generally, a strong partnership with the international scientific community is wished to maximize the scientific return. Further information:
  • on the website of the pre-launch workshop
  • Missions: CFOSAT
Categories: Climate Science News

Copernicus Sentinel-3 improves observation of inland waters

Fri, 2018-10-05 04:46
While world-class scientists are meeting in the Azores to discuss how satellites have revealed changes in the height of the sea, ice, inland bodies of water and more, the Copernicus Sentinel-3 satellite has new reasons to shine. Radar altimeters record the surface topography along the satellite's ground track. They precisely measure the height of water, land and ice by timing the interval between the transmission and reception of very short radar pulses. This is the only technology that can measure, systematically and globally, changes in the height of the ocean - and is therefore essential for monitoring sea-level rise. After a successful commissioning phase (flying 30 seconds apart in tandem with its twin Sentinel-3A), the Sentinel-3B satellite of the European Union's Copernicus Programme will be moved, in October, to its final orbit. During this drift period, the altimeter will be uploaded with new Open-Loop Tracking Command (OLTC) tables, which are used to control the return echo acquisition phase of the altimeter by setting its reception window. This on-board process ensures recording reliable and quality measurements over inland waters. These tables have been upgraded with more than 32,500 virtual stations defining lakes, reservoirs, rivers and even glaciers worldwide, as shown on the featured image. More information here.
Categories: Climate Science News

22 September - 5 October 2018 Weeks

Fri, 2018-10-05 02:07
The new normal? How climate change is making droughts worse (The Guardian, 03/10/2018) ICESat-2 laser fires for first time, measures Antarctic height (EurekAlert!, 03/10/2018) A rare combination of Category 5 storms in the Pacific (Axios, 02/10/2018) What caused the Indonesia tsunami and could lives have been saved? (The Guardian, 02/10/2018) Terrawatch: why did the quake in Sulawesi cause a tsunami? (The Guardian, 02/10/2018) Scientists solve a Southern Ocean climate change mystery (Axios, 28/09/2018) What pushed 2017’s Atlantic hurricane season into overdrive? (Ars Technica, 28/09/2018) New research shows the world’s ice is doing something not seen before (The Guardian, 26/09/2018) How reliable are turtles for measuring ocean trash and marine health? (Science Daily, 26/09/2018) A vast wall in Antarctica could slow rising seas, but some scientists are wary of the idea (NBC news, 26/09/2018) European Space Agency shining the spotlight on sea-level rise (Digital Journal, 25/09/2018) Liquid climate archives: A study on tide levels in the straits (Phys.org, 25/09/2018) Earth from Space - São Miguel, Azores (Spaceref, 21/09/2018) Au Bangladesh, les eaux avancent, les hommes reculent (L'Obs, 04/10/2018) Le Portugal se dote d'une base spatiale aux Açores (Sciences & avenir, 02/10/2018) Réchauffement climatique. Comment garder la tête hors de l’eau ? (Courrier International, 02/10/2018) Les côtes arctiques franchies pour la première fois par la Marine française (Sciences & avenir, 02/10/2018) Climat : limiter la hausse des températures à 1,5°C, est-ce possible ? (Sciences & avenir, 01/10/2018) Le Japon balayé par le typhon Trami et ses rafales à 216 km/h (Le Monde, 30/09/2018) Australie: une célèbre plage avalée par la mer (L'Express, 26/09/2018) Cent jours sans gel au Pic du Midi: un nouveau record historique (Sciences & avenir, 22/09/2018) On line availability of articles depends on the Newspaper/magazine. We can't thus certify that above articles will be freely and permanently available.
Categories: Climate Science News

October 2018: A new satellite to measure winds and waves

Fri, 2018-10-05 00:46
CFOSAT launch is planned on Oct. 29, 2018. Some ideas of what this brand-new satellite concept will...
Categories: Climate Science News

September 2018: A buoy trapped in filaments

Fri, 2018-10-05 00:44
Sometimes drifting buoys stay around the same point. FSLE can help interpret this.
Categories: Climate Science News

New release of the Finite-Size Lyapunov Exponents (FSLEs)

Thu, 2018-10-04 02:34
The maps of Backward-in-time, Finite-Size Lyapunov Exponents (FSLEs) and Orientations of associated eigenvectors have been updated after a whole reprocessing from January 1st 1994 to January 18th 2018. Data are computed over global ocean within the SALP/Cnes project in collaboration with CLS, LOcean and CTOH. The main upgrades for this reprocessing are the following:
  • madt_uv input data are derived from DUACS DT2018 instead of DUACS DT2014.
  • Data are available daily from 01-01-1994 to 18-01-2018
  • Initial separation is 0.02 degree instead of 0.04 degree. The filaments are much thinner.
Data format remains unchanged. More information can be found on the product page.  Data are available on FTP and on Gridded Data Extraction tool from : My AVISO+ web page.

FSLE DUACS 2018 compare to FSLE DUACS 2014 credit CNES/CLS

Link to the video here
Categories: Climate Science News

New release of the Mesoscale Eddy Trajectory Atlas

Thu, 2018-09-27 18:00
This dataset includes the tracks of eddies detected and monitored in the multimission "2-satellite" delayed-time DUACS products with additional information such as speed, radius, or eddy type (cyclonic/anticyclonic). This experimental version 2.0 takes into account the new DUACS2018 dataset (Jan 93 to Jan 18) and include some improvements in the tracking process. Complete information on the product page.
Categories: Climate Science News

Live: 25 years of radar altimetry

Fri, 2018-09-21 02:50
The opening session of the 25 Years of Progress in Radar Altimetry (Mon 24 Sep 08:55-13:00 UTC) will be live streamed for those who cannot unfortunately attend this event: http://www.esa.int/Our_Activities/Observing_the_Earth/Live_25_years_of_radar_altimetry
http://www.esa.int/live You can view and download the full program at: https://www.altimetry2018.org/ 
Categories: Climate Science News