AVISO Climate Change News

Syndicate content AVISO: Rss Feeds
Live from Aviso Website
Updated: 53 min 25 sec ago

EGU2017, Vienna, Austria

Sun, 2017-04-23 05:00
Categories: Climate Science News

EGU2017, Vienna, Austria

Sun, 2017-04-23 05:00
Categories: Climate Science News

New Mean Sea Surface

Sun, 2017-03-26 23:43
The key points of this CNES_CLS 2015 MSS are:
  • a drastic improvement of the shortest wavelengths,
  • a better correction of the oceanic variability,
  • more accuracy near the coast.
  • globally, strong reduction of errors when computing SLA
  • more homogeneity of accuracy compared to the former versions
This new version is based on a 20-year period (1993-2013) of altimetry data (mean profiles, geodetic mission and SLA): mean profiles from Topex/poseidon, ERS-2 , GFO, Jason-1, Jason-2, and Envisat; geodetic phase from ERS-1, Jason-1 and Cryosat-2. Further information:
  • Data: Auxiliary products: Mean Sea Surface
Categories: Climate Science News

Jason-3 integrated in the Mean Sea Level processing

Fri, 2017-03-24 01:57
Almost three quarters of the Earth’s surface are covered by oceans: oceans are a key-element of our global climate system. It is a reality, the oceans respond to climate change: as a result of human activity and greenhouse gases, the climate is warming, the ocean expands and its level rises. Oceans are under close surveillance at all times: altimetry satellites accurately measure the sea level with a homogeneous and continuous global coverage since the launch of Topex-Poseidon in 1992. The Jason-3 mission complements this satellite constellation in flight by providing continuity of measurements that is essential for observing climate change. --> Use the interactive tool enabling to plot and download the Mean Sea Level trend times series and maps by selecting an area, a time-period (for time series only), one or several satellite missions. Further information:
  • Ocean indicators: Mean Sea Level, Processing and Corrections
  • Altimetry in videos for Jason-3 launch: Mean Sea Level
  • Applications: Mean Sea Level, Greenhouse effects
Categories: Climate Science News

12-19 March, 2017 week

Thu, 2017-03-23 08:07
Réchauffement climatique : l'ONU tire la sonnette d'alarme (France Info, 2017/03/21)
Pérou : des inondations ont fait au moins 65 morts depuis janvier (France 24, 2017/03/18)
Changement climatique : les océans se réchauffent plus vite que prévu (Numerama, 2017/03/13)
Un glacier bolivien préservé en Antarctique (Tribune de Genève, 2017/03/12)
UNE ÉPONGE GÉANTE POUR NETTOYER L'OCÉAN APRÈS UNE FUITE DE PÉTROLE (Le Monde, 2017/03/11)
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

[Jason-2] after the Safe Mode, nominal activities restart

Wed, 2017-03-22 08:55
The PMA GPS OnBoard SoftWare has been uploaded successfully on Jason-2's spacecraft. Nominal recovery activities restart today (2017/03/22). The exact foreseen sequence for restart is now to switch on Poseidon, AMR and GPSP on Friday 24th around 10:30UTC (2017/03/24). This means that the first products should be available around 13:00UTC, after a first orbit of measurements. However, please note that those first products could be impacted by the drag make-up maneuver that needs to be performed around 13:00UTC. Christophe Marechal, JA2/3 CNES project manager, on behalf of Jason-2 project managers from NOAA, EUMETSAT and JPL Linked articles:
  • [Jason-2] Jason-2 in safe mode since March 15th, 19:19 UTC
Categories: Climate Science News

22 March, World Water Day: views from space

Wed, 2017-03-22 00:21
Fresh water, essential for all life on Earth, is present in a finite amount on our planet (only 0.007% of all the planet's water is accessible for human consumption via rivers, streams, reservoirs and lakes).

In particular, it is essential for human activities. The consumption of fresh water is growing three times faster than the population. But global water resources are shared unequally between countries and continents: Asia accounts for 60% of the world’s population but has only 36% of its water, while South America has only 7% of the population but 30% of the water.

Today, water is no longer simply a problem for "poor countries": drought is increasingly afflicting areas of China, the USA, Australia and Europe. Aquifers are drying up and pollution and salinity are reducing water reserves even further. It has become essential to introduce tools to optimise the management of these resources.

At the moment, hydrology is essentially based on probes and gauging stations installed in situ at the edges of watercourses or lakes. But these instruments are distributed very unevenly across the surface of the globe, and it is often difficult to keep them properly maintained and calibrated. Satellite-based observation helps ensure the regularity and homogeneity of measurements from all over the planet. Satellite missions have led to major advances in environmental studies, including in the management of water resources. Among other achievements, nadir altimetry can acquire the height of the water of certain lakes or rivers, and the wide-swath altimetry made possible by SWOT will soon extend this possibility to include all inland waters.

Precipitation, evaporation and evapotranspiration, water levels and surface areas, the extent of frozen regions, soil moisture, groundwater reserves, water quality, surface water temperature, depth, mapping of watersheds – all this information can be and already is being provided today by Earth observation satellites. In addition, by combining all these sources, combining some of them with in situ measurements and/or with models, synoptic maps can be compiled on the situation of a watershed, a water deficit for example, risk maps, estimates of the flow of rivers, snowmelt, or the speed of the flow and shrinkage of glaciers.

The use of satellite observation in hydrology is bound to be called on increasingly, with ever more uses combining all available measurements and data, for better management of this most vital of resources: fresh water.

Categories: Climate Science News

5-12 March, 2017 week

Thu, 2017-03-16 07:12
Réchauffement climatique: la Grande Barrière de corail en Australie connaît un deuxième épisode de blanchiment  (Arc Info, 2017/03/10)
Le réchauffement climatique affectera les 4/5 des océans du monde d'ici 2050 (News environnement, 2017/03/08)
Sciences : un réchauffement climatique en dessous de 1,5°C, seul moyen de sauver la banquise... et la planète ? (Sud Ouest, 2017/03/08)
Le changement climatique dérange les océans (Le Figaro, 2017/03/07)
Des fluctuations climatiques très semblables d'un bout à l'autre de la chaine alpine et la fonte des glaciers s'était fortement accélérée (Média Terre, 2017/03/07)
L'Arctique est-il en train de mourir (et nous avec) (France TV Info, 2017/03/05)
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

[Jason-2] Jason-2 in safe mode since March 15th, 19:19 UTC

Thu, 2017-03-16 06:11
The satellite is currently in a safe and stable Sun-pointing configuration. Expert teams from CNES and industry (TAS) have been activated and detailed investigations will start today. First investigations performed this night show that Gyrometer 1 was blocked, causing the reconfiguration to SHM. All other equipments were OK at the time of the reconfiguration. I will probably be able to get back by COB with news on the health of Gyro 1. The four partners operational teams are working closely to support current and future operations. The mission will resume as soon as possible, and we will keep you informed of our progress. Christophe Marechal, CNES Jason 2 project manager on behalf of Jason-2 project managers from NOAA, EUMETSAT and JPL.
Categories: Climate Science News

February 26 - March 5, 2017 week

Thu, 2017-03-09 09:03
L'Arctique est-il en train de mourir (et nous avec) ? (France TV info, 2017/03/05)
Un iceberg géant va faire monter le niveau des mers (Ouest France, 2017/03/03)
De plus en plus inquiétant: si ça continue comme ça, il n'y aura plus un seul ours polaire d'ici 2100 (Newsmonkey, 2017/02/27)
La météo bizarre est-elle due au réchauffement climatique ? (Meteo Media, 2017/02/26)
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

Temporary unavailability of the CNES ftp server on March 8-9, 2017

Mon, 2017-03-06 03:20
For maintenance reason, the Cnes ftp server (ftp://avisoftp.cnes.fr/AVISO/pub) is unavailable on
  • March 8, 2017 between 7:00 and 9:00 UTC,
  • March 9, 2017 between 7:00 and 9:00 UTC.
We apologize for the inconvenience.
Categories: Climate Science News

March 2017: Satellites see the highs and lows of the biggest lake in China

Wed, 2017-03-01 04:06
To celebrate the World Water Day (March 22nd), a satellite-based focus on the biggest lake in...
Categories: Climate Science News

20-26 February 2017 week

Wed, 2017-03-01 03:29
50 récifs de corail testés pour lutter contre le changement climatique (News Environnement, 2017/02/15)
La Méditerranée, terre fertile pour le réchauffement (Natura Sciences, 2017/02/23)
Pourquoi les océans sont essentiels dans la régulation du climat mondial (Huffpostmaghreb, 2017/02/22)
Les océans pollués par des particules invisibles de plastique (Le Monde, 2017/02/22)
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

12-19 February, 2017 week

Thu, 2017-02-23 01:52
Les glaciers alpins fondent à très grande vitesse (Le Monde, 2017/02/16)
Sentinels Warn of Dangerous Ice Crack (ESA, 2017/02/16)
Des fluctuations climatiques très semblables d’un bout à l’autre de la chaine alpine et une fonte des glaciers qui s’accélère depuis 2003 (CNRS, 2017/02/15)
Atlantique Nord : le risque d'un refroidissement rapide au XXIe siècle revu à la hausse (CNRS, 2017/02/15)
Pacific Wind and Current Changes Bring Warm, Wild Weather (Earth Observatory, 2017/02/14)
La pollution chimique gagne les abysses (Le Monde, 2017/02/13)
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

5-12 February, 2017 week

Thu, 2017-02-16 08:37
Climat : les mangroves s'avèrent de loin l'écosystème qui stocke le plus de carbone (Science et Vie, 2017/02/10)
Les manchots du Cap menacés par la surpêche et le réchauffement climatique (Sciences et Avenir, 201/02/10)
Comprendre le comportement des forêts tropicales dans le cadre du système climatique changeant de la Terre (MédiaTerre, 2017/02/03)
Climate change could trigger strong sea level rise (Space Daily, 2017/01)
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

22 January - 5 February, 2017 weeks

Thu, 2017-02-09 03:23
Tara. Des récifs coralliens en danger (Telegramme, 2017/02/05)
El Niño n'explique pas tout (Pour la Science, 2017/02)
Oceanographic analysis offers potential crash site of MH370 (Terradaily, 2017/01/24)
Une animation de la NASA montre l'ampleur du réchauffement climatique (Le Monde, 2017/01/23)
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

Feb. 2017: Tidal currents make a buoy's path spiral

Tue, 2017-02-07 02:55
Altimetry helped to improve the tide models, including tidal currents. A, Argonautica buoy path can...
Categories: Climate Science News

15-22 January, 2017 week

Thu, 2017-01-26 07:36
Montée des océans : les scientifiques découvrent un élément préoccupant (Le Point, 2017/01/20)
Comment le réchauffement climatique pourrait redessiner la carte du monde (Geo, 2017/01/19)
Nouveau record de chaleur sur Terre en 2016 (Presse Océan, 2017/01/18)
La fonte des glaces en Antarctique menace une station scientifique (Le Figaro, 2017/01/17)
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

Jason-3 mini-web sites contest now open

Mon, 2017-01-23 07:59
Discover the role of Jason-3, the European-American oceanography satellite launched at the beginning of 2016 to study the climate and the environment, by taking part in the Jason-3 mini-site competition*.
Use the resources made available by the various stakeholders in this space project, to design a mini-site which reflects your understanding of satellite-based Earth observation of climate and biodiversity changes.
The competition is limited to primary, middle and high school classes. The articles may be written in French or English. CNES will be awarding a prize for the best production for each of the three school levels. The winning sites will be highlighted on CNES web sites and social networks and those of its partners.

*Open 7 November 2016 to 28 April 2017
Categories: Climate Science News

Jason-3 mini-web sites contest now open

Mon, 2017-01-23 07:59
Discover the role of Jason-3, the European-American oceanography satellite launched at the beginning of 2016 to study the climate and the environment, by taking part in the Jason-3 mini-site competition*.
Use the resources made available by the various stakeholders in this space project, to design a mini-site which reflects your understanding of satellite-based Earth observation of climate and biodiversity changes.
The competition is limited to primary, middle and high school classes. The articles may be written in French or English. CNES will be awarding a prize for the best production for each of the three school levels. The winning sites will be highlighted on CNES web sites and social networks and those of its partners.

*Open 7 November 2016 to 28 April 2017
Categories: Climate Science News