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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

10 - 21 September 2018 weeks

Fri, 2018-09-21 02:00
Keeping score on Earth's rising seas (Nasa's Sea Level, 18/09/2018) Hurricane Florence is a climate change triple threat (The Guardian , 14/09/2018) ICESat-2: Tracking Earth's Ice with Unparalleled Detail (Space.com, 13/09/2018) Antarctique : l’un des plus grands icebergs jamais vus prend le large (Futura Sciences, 18/09/2018) La NASA lance un laser en orbite pour mesurer la fonte des glaces (Le Monde, 15/09/2018) Comment les ouragans sont-ils classés ? (Le Monde, 12/09/2018) Météo: 70% de probabilité d'un phénomène El Niño à la fin de l'année (Sciences & avenir, 10/09/2018) 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

Hurricane Florence and Typhoon Mangkhut

Wed, 2018-09-19 02:37
Satellite altimetry data from Sentinel-3A measured the Significant Wave Heights during the passage of these storms (see Figure 1 below):
  • more than 5 m at 10-25 km off the North and South Carolina coasts on 13 and 14 September (respectively for the ground tracks 678 and 691) while the hurricane Florence crossed this area. A peak at almost 7m was measured on 13 Sept. at ~70 km off the coasts.
  • more than 10 m at only 16 km off the Hong-Kong coasts was measured on 15-16 September (respectively for the ground tracks 733 and 748).
The SAR on the Sentinel-1B satellite provided wind fields while the super typhoon Mangkhut was heading towards southeast Asia with a maximum wind speed reaching 288 km/h on 11 September (see Figure 2 at the bottom). The upcoming launch of the Chinese-French CFOSAT satellite scheduled on 2018/10/29 will allow accurate ocean forecasts during such extreme events by collecting data both on wind speed and wave height.

Fig. 1 : Significant Wave Heights (H1/3, in meters) measured along-track by Sentinel-3A during hurricane Florence (left) and typhoon Mangkhut (right), during the passage of the storms, on September 2018.

The maps plots all the tracks between 10-14 Sept. for Florence and 15-17 Sept. for Mangkhut. The plots at the bottom only show the SWH nearest the passage of the storms off the coasts (x-axis indicates the distance to the coast in km for each track).

Credits EU Copernicus Marine Service for the data, produced by AVISO+.

Fig.2: Ocean surface wind speed map measured by Sentinel-1B on 2018/0911 while the typhoon Magkhut was in Category 5. Maximum wind speed reached more than 80m/s (288km/h). The ocean fields are given by the Sentinel-1 SAR on its Extended Wide Swath mode. The swath about 400 km-width are visible on the map. Credits Sentinel-1B: Contains modified Copernicus Sentinel data 2018 processed by IFREMER/CLS. 

Further information
    • page Missions
    • video presentation of the CFOSAT project (posted by CNES)
  • on Copernicus Marine Service website: Looking at hurricane Florence through wave height with model data.
  • Data access:
    • Significant wave heigths from Sentinel-3A, European Copernicus Marine Service
Categories: Climate Science News

CFOSAT : launch foreseen on October 29th, 2018

Fri, 2018-09-14 09:40
CFOSAT, China France Oceanography SATellite, operated by CNES and CNSA, is devoted to ocean surface wind and wave observation. The CFOSAT Joint System Review & PSR will take place from the 15th to the 18th of September, after which the launch campaign will start until the launch on October 29th.   To learn more about the mission and the instruments:
  • Missions: CFOSAT
  • CFOSAT on the Cnes space scientific missions web site
  • Multimedia: Seven posters to know more about the mission and the French (Swim for measuring waves) and Chinese (Scat for measuring global sea level surface wind) instruments
Categories: Climate Science News

1 - 9 September 2018 week

Wed, 2018-09-12 03:44
China launches satellite to monitor world’s oceans (Spaceflight now, 09/09/2018) Increasing odds that Tropical Storm Florence will threaten East Coast (Axios, 07/09/2018) Climate change could affect human evolution. Here's how. (NBC news, 07/09/2018) Scientists find the reason why part of West Antarctic ice is thickening (Knowridge, 07/09/2018) World's biggest sovereign fund in Norway urges companies to help save oceans (First Post, 06/09/2018) Melting glaciers increasing risk of landslide-triggered tsunamis, study reveals (The independent, 06/09/2018) Massive Ocean Waves May Play a Role in Nuisance Flooding (EOS, 04/09/2018) Y a-t-il vraiment 5 continents de plastique dans les océans ? (Libération, 07/09/2018) 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

Aviso+ Users Newsletter #15

Mon, 2018-09-10 05:35
We are pleased to announce you the publication of the fifteenth  Aviso+ Users Newsletter :  CONTENTS: 
  • Project News: Ongoing and forthcoming missions, ongoing developments
  • Aviso+ User Satisfaction Survey 2018 : What are you telling us ?
  • Toward a new generation of DUACS products with finer resolution
  • Events
Find all the past newsletters here.
Categories: Climate Science News

[Sentinel-3A L2P] redelivery of NTC Sentinel-3A cycle 24 on September 6th 2018

Thu, 2018-09-06 07:07
Please, be informed that the cycle 24 of the NTC Sentinel-3A L2P products covering the period between 16/11 to 23/11/2017 has been redelivered.
Indeed, following the installation of the new software version, the values of the SLA bias were not correct.
The files from version 02_00 named global_sla_l2p_ntc_s3a_C0024_P*_201711*_20180823*.nc.gz have been redelivered with the corrected variables 'inter_mission_bias' and 'sea_level_anomaly' We apologize for the inconvenience.
Categories: Climate Science News

6 - 31 August 2018 weeks

Mon, 2018-09-03 09:14
The Most Powerful Storm of 2018 Is Headed Toward Japan (Earther, 31/08/2018) How a Battle to Build the Best Weather Model Impacts Everyone on Earth (Earther, 30/08/2018) Future impacts of El Niño, La Niña likely to intensify, increasing wildfire, drought risk (National Science Foundation, 28/08/2018) Arctic’s strongest sea ice breaks up for first time on record (The Guardian, 21/08/2018) Why sea level rise varies from place to place (Science News, 15/08/2018) Humans are pushing the Earth closer to a climate cliff (The Guardian, 15/08/2018) Jakarta is slowing sinking into the Earth (World Economic Forum, 15/08/2018) Jakarta, the fastest-sinking city in the world (BBC, 13/08/2018) From greenhouse to hothouse: the language of climate change (The Guardian, 09/08/2018) Pollution is slowing the melting of Arctic sea ice, for now (The Guardian, 03/08/2018) Le Libé des Océans (Libération, 31/08/2018) The Ocean Cleanup va déployer son premier barrage anti-déchets dans l’océan Pacifique-Nord ! (Science Post, 31/08/2018) La couche de glace la plus solide et la plus ancienne de l’arctique se fracture (Science Post, 26/08/2018) Mystère du triangle des Bermudes : l'hypothèse des vagues scélérates (Futura Science, 18/08/2018) Canicules : ça chauffe aussi très fort pour les océans (Le Nouvel Obs, 16/08/2018) 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

World Water Week - 26 – 31 August, 2018

Thu, 2018-08-30 01:12
an international meeting on globe’s water issues
Categories: Climate Science News

23 July - 5 August 2018 weeks

Tue, 2018-08-07 02:14
2017, nouvelle année rouge pour le climat (Les Echos 02/08/2018) Climat : 2017, année de tous les records (Le Monde 01/08/2018) Les océans toujours aussi chauds, leur niveau toujours plus haut (BFM 02/08/2018) Seuls 13% des océans sont encore sauvages (Le Temps 26/07/2018) Environ 90% des manchots de cette colonie ont disparu, et personne ne sait pourquoi (sciencepost 31/07/2018) Un affaiblissement de la circulation océanique en Atlantique ne ralentirait pas le réchauffement climatique, mais conduirait à son amplification ! (sciencepost 28/07/2018) En plus de polluer les océans, le plastique contribue au réchauffement climatiquer ( Agence France-Presse, 02/08/2018) 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

August 2018: Waves steepen in accelerating currents

Wed, 2018-08-01 01:08
Altimetry showns an increased steepness of waves interacting with currents accelerating abruptly....
Categories: Climate Science News

Visual presentation of the ODATIS Ocean Cluster

Mon, 2018-07-30 02:41
ODATIS, Ocean Data Information and Services, serves as the entry point to access all French Ocean observation data. Its general objective is to promote and facilitate the use of ocean observations sampled by way of in situ and remote sensing measurements. ODATIS contributes to describing, quantifying and understanding the ocean as a whole — offshore and coastal — with regard to aspects such as the dynamics and thermodynamics of the ocean, the evolution of its physico-chemical properties, biogeochemical cycles, the operation of marine ecosystems, the evolution of the ocean and the ocean-climate relationship in the past. See the video presentation on the ODATIS website (in french)
Categories: Climate Science News


Wed, 2018-07-25 08:27
From today at 08:30UTC Jason-2 spacecraft is back to operations. The first OGDRs could be generated around 10:45UTC.  It is now starting its measurements on the i-LRO orbit, on cycle 600.
Categories: Climate Science News