Fabrice Ardhuin | Lightnews

JGR: Oceans @jgroceans.bsky.social · 10h

Ask not what your journal can do for you—ask what you can do for your journal 🌊

JGR:Oceans is now looking for new Editors and Associate Editors, if you're interested get in touch. We don't bite! 😀

Editor and Associate Editor positions at JGR:Oceans

Fabrice Ardhuin @fabriceardhuin.bsky.social · 5d

Petite clarification, contrairement à ce que titre Science et Avenir, nous n'avons pas du tout travaillé sur les vagues scélérates ... mais sur les plus hautes vagues en mer, qui ne sont pas scélérates: www.sciencesetavenir.fr/tag_theme/va...

... ma version est là: www.umr-lops.fr/Le-LOPS/Actu...

Vague scélérate : actu, infos et vidéos

Retrouvez toutes les infos sur Vague scélérate : articles, vidéos et photos consacrés au thème Vague scélérate par la rédaction de Sciences et Avenir.

www.sciencesetavenir.fr

European Space Agency @esa.int · 6d

The #CopernicusEU Sentinel-1 mission welcomes a new member: Sentinel-1D, launched at 21:02 GMT/22:02 CET from Kourou on Ariane 6 #VA265.

www.esa.int/Applications...

@cnes.fr @euspa.bsky.social @ec.europa.eu @thalesaleniaspace.bsky.social @transport.esa.int

The Sentinel-1 mission – which provides radar vision for the Copernicus Earth observation programme – has a new addition to its family of satellites, with the arrival in orbit of Sentinel-1D, the last of the groundbreaking first generation. The launch took place at 22:02 CET (18:02 local time), on Tuesday, 4 November, on board an Ariane 6 launcher from Europe’s Spaceport in French Guiana.

Fabrice Ardhuin @fabriceardhuin.bsky.social · 10d

I have not updated all I wanted ... but it is here now : github.com/ardhuin/wave...
So much new stuff from SWOT that should be in there, but we will have to write the papers first. Here is a teaser from chapter 5. And if you are wondering what is H_L=5 km,T > 18 s, well that is "some" wave height.

Figure 5.4: Variability of ”SWH” (in colour) around 0.7◦ N on track 26 of cyclz 26 (24 December 2024).
Here SWH is estimated from two instruments on board the SWOT satellite: KaRIN and Poseidon-3C
with two different method (Bohé et al., 2025). KaRIN also provides a map of the sea surface elevation,
shown in grey scale, that resolves swells with periods longer than 18 s. The large values in the very
patchy map of SWH correspond to groups of long waves. These long waves were generated by storm
Eddie (Ardhuin et al., 2025). More of this data can be viewed using the Ocean Virtual Laboratory, https://odl.bzh/2GsA5tZQ ).

CNRS Terre & Univers @cnrs-insu.bsky.social · 10d

🏅 Félicitations aux lauréates et lauréats des prix 2025 de l'Académie des sciences relevant de l'INSU !

Leurs travaux font rayonner les sciences de la Terre et de l'Univers 🌍✨

👉 www.insu.cnrs.fr/fr/cnrsinfo/...

Prix 2025 de l’Académie des sciences : des chercheuses et chercheurs CNRS Terre & Univers à l’honneur

Sous la Coupole de l’Institut de France, l’Académie

www.insu.cnrs.fr

Fabrice Ardhuin @fabriceardhuin.bsky.social · 12d

Tomorrow is my last day for updating the 2025 version of "Waves in Geosciences"
github.com/ardhuin/wave...
and sending it to the print shop for students. I'm adding a few things about wave groups nicely imaged by SWOT
odl.bzh/5XOQuf5z

If there is anything else you'd like, let me know.

GitHub - ardhuin/waves_in_geosciences: Teaching material about wind-generated waves for Master of Science students (some basic knowledge of fluid mechanics is required)

Teaching material about wind-generated waves for Master of Science students (some basic knowledge of fluid mechanics is required) - ardhuin/waves_in_geosciences

github.com

Melaine Le Roy @subfossilguy.bsky.social · 13d

UTTERLY SURREAL LOW ANGLE GLACIER SLIDE!! 😮😱

On Saturday at 11:00 am, a 2 km-long, 25 m-high, and 150-200 m in width section detached off the Ismoil Somoni Glacier (Tajikistan) and slid down the gorge! 🧊🌊

asiaplustj.info/en/node/354309
📽️ via @volcaholic1

Katharine Hayhoe @katharinehayhoe.com · 13d

The world might be pulling back on climate truth: but I'm stepping it up.

How? I'm adding new videos, deep dives & behind-the-scenes stories to Talking Climate.

Why? Because climate honesty and hope matter more than ever right now.

Join me on Patreon: bit.ly/47pCLaf
Or Substack: bit.ly/4ntfvhJ

Fabrice Ardhuin @fabriceardhuin.bsky.social · 15d

And let us not forget that : Last year, about 500,000 tonnes of krill were trawled in the Antarctic. Norway took 67.2% of the total krill catch in 2023; followed by China, at 17.1%; South Korea, with 8.4%; Chile, with 4.4%; and Ukraine taking 2.8%.

www.theguardian.com/environment/...

Antarctic krill: how did a paperclip-sized crustacean cause a diplomatic row – and why are they so important?

Russia’s arrest of a Ukrainian scientist this week over his support for curbs on krill fishing have thrown the vital role of the tiny marine species into the spotlight

www.theguardian.com

Attac France @attac.org · 19d

Alerte cambriolage…
par l'excellent Thibaut Soulcié

Dessin de presse avec Macron et Lecornu sur un scooter en train de cambrioler la Sécurité sociale.

Fabrice Ardhuin @fabriceardhuin.bsky.social · 26d

article très intéressant dans la revue "Nature Communications".

Ed Hawkins @edhawkins.org · 26d

A request for weather interested volunteers!

Met Eireann would like to rescue millions of weather observations taken in Ireland over many decades that are still stuck on paper. #WeatherRescue

Anyone can help: www.zooniverse.org/projects/met...

Patrick Marques @pmarques35.bsky.social · 26d

[1/3] Le porte-conteneurs Istanbul Bridge a relié Ningbo à Felixstowe via l’Arctique en 21 jours inaugurant la "China-Europe Arctic Express Route". Ce trajet raccourcit de 22 j la liaison maritime entre la Chine et l’Europe signe d’une nouvelle géographie mondiale des flux. #geography #trade #Arctic

Ship sails China – Felixstowe in 21 days via Arctic

The Northern Sea Route is via the Arctic in far north Russia is a long talked about alternative to traditional routes via the Malacca Strait.

www.seatrade-maritime.com

Fabrice Ardhuin @fabriceardhuin.bsky.social · 27d

OVL is an amazing tool for discovery... The only limit is your imagination and the amount of data that has been ingested so far (and that will evolve).

OceanDataLab @oceandatalab.bsky.social · 27d

Dive into our new #OVL portal!
Compare #SWOT products (NASA, @cnes.fr) from #AVISO+ with #CFOSAT (@cnes.fr) and other satellite / in-situ measurements:
👉 aviso-calval.oceandatalab.com
Join us today / tomorrow at #SWOT meeting for live demos during coffee and lunch breaks, Moulleau Room, 2nd floor!

OceanDataLab @oceandatalab.bsky.social · 27d

Dive into our new #OVL portal!
Compare #SWOT products (NASA, @cnes.fr) from #AVISO+ with #CFOSAT (@cnes.fr) and other satellite / in-situ measurements:
👉 aviso-calval.oceandatalab.com
Join us today / tomorrow at #SWOT meeting for live demos during coffee and lunch breaks, Moulleau Room, 2nd floor!

Fabrice Ardhuin @fabriceardhuin.bsky.social · 28d

The visualization tool for wave heights is just in time for my classes on waves starting in November!
odl.bzh/CACKkfxO. thanks to @oceandatalab.bsky.social

fingers of higer waves are caused by refraction of swell over currents.The first time we saw this kind of feature was on Envisat ASAR.

7-day composite of wave heights from Scotland to France (dark red is 8 m) from SWOT KaRIN instrument (22 to 28 August 2025), showing land shadows and effects of currents on wave heights. In particular "fingers" of higher waves are pointing in the wave propagation direction and are caused by a focusing of waves in currents located "upwave" of the measurement.

Fabrice Ardhuin @fabriceardhuin.bsky.social · 28d

If you are in Arcachon for the SWOT meeting and want to give us feedback on wind and waves measurements by SWOT, let's chat. If you are at home, well you can enjoy the visualization of wave heights and spectra now added for some test cases in the @oceandatalab.bsky.social OVL: odl.bzh/uJz5APMK

Fabrice Ardhuin @fabriceardhuin.bsky.social · 28d

Si vous vous chauffez au gaz (38% de l'utilisation de gaz en France), voici une bonne raison de passer à la pompe à chaleur: mettre fin à l'impérialisme russe et à l'accumulation de ses victimes.
kyivindependent.com/seven-eu-sta...

7 EU states increase Russian energy imports in 2025, Reuters reports

Among the seven nations increasing their purchases, France saw a 40% jump, importing 2.2 billion euros ($2.5 billion), while the Netherlands’ imports surged 72% to 498 million euros ($579 million). Be...

kyivindependent.com

Fabrice Ardhuin @fabriceardhuin.bsky.social · 28d

Wishing the best to all the friends and colleagues at JPL

CNBC @cnbc.com · 28d

NASA unit JPL to lay off about 550 workers, citing restructure

The Jet Propulsion Laboratory is a research and development lab funded by NASA — the federal space agency — and managed by the Caltech.

cnb.cx

CNBC @cnbc.com · 28d

NASA unit JPL to lay off about 550 workers, citing restructure

The Jet Propulsion Laboratory is a research and development lab funded by NASA — the federal space agency — and managed by the Caltech.

cnb.cx

Libération @liberation.fr · Oct 10

Démontant un à un les arguments avancés contre la taxe Zucman, l’économiste américain Joseph Stiglitz décrit l’égalité fiscale et la taxation des ultrariches comme des conditions de «la démocratie et de la solidarité sociale».

➡️ bit.ly/3KC9TnI

Fabrice Ardhuin @fabriceardhuin.bsky.social · Oct 9

Les houles lointaines ne peuvent plus échapper au nouvel instrument de mesure "KaRIN", enmbarqué depuis 2022 sur le satellite SWOT. Ces nouvelles données éclairent d'un nouveau jour la question de la formation des vagues les plus hautes.

Patrick Marques @pmarques35.bsky.social · Oct 9

[1/3] INSOLITE - La tempête Eddie a généré des vagues de près de 20 m, un record mesuré depuis l’espace. Grâce aux satellites SWOT et Copernicus, les chercheurs ont suivi leur propagation sur 24.000 km, révélant l’ampleur mondiale de la puissance des houles océaniques. #geography

Satellites record 20-meter high wave, showing the power of ocean swell

During recent storms, satellites recorded ocean waves averaging nearly 20 meters high—as tall as the Arc de Triomphe in Paris and the largest ever measured from space. Moreover, satellite data now rev...

phys.org

Patrick Marques @pmarques35.bsky.social · Oct 9

[1/3] INSOLITE - La tempête Eddie a généré des vagues de près de 20 m, un record mesuré depuis l’espace. Grâce aux satellites SWOT et Copernicus, les chercheurs ont suivi leur propagation sur 24.000 km, révélant l’ampleur mondiale de la puissance des houles océaniques. #geography

Satellites record 20-meter high wave, showing the power of ocean swell

During recent storms, satellites recorded ocean waves averaging nearly 20 meters high—as tall as the Arc de Triomphe in Paris and the largest ever measured from space. Moreover, satellite data now rev...

phys.org

Ouest-France @ouest-france.fr · Oct 7

Des travaux de voiries ont mené à une découverte étonnante à Plovan (Finistère). Présents pour intervenir sur un nid-de-poule, des employés communautaires ont mis au jour l’entrée d’une cavité souterraine. Selon un archéologue, il pourrait s’agir d’un accès à un souterrain remontant à l’Âge de fer.

En Finistère, le nid-de-poule cacherait un « puits d’accès à un souterrain gaulois de l’Âge du fer »

Des travaux de voiries ont mené à une découverte étonnante, ce lundi 6 octobre 2025, à Plovan (Finistère). Présents pour intervenir sur un nid-de-poule, des employés communautaires ont mis au jour l’e...

www.ouest-france.fr

Richard Waite @waiterich.bsky.social · Oct 6

This is an extremely common food-GHG pattern for food providers in North America and Europe, but it never fails to surprise people the first time they run the numbers and see it!

Just one food, beef, can account for 40-50% or more of the GHG emissions related to an organization’s food purchases.

Dr. Sarah Fortner @erthsarah.bsky.social · Oct 6

A reality check for me was working with students on an internal carbon accounting platform that Bon App our food provider uses. Beef was less than 5% of our purchases but around 50% of our food emissions even with international work to be plant forward.

apnews.com/article/plan...

A recipe for avoiding 15 million deaths a year and climate disaster is fixing food, scientists say

Scientists are presenting new evidence that the worst effects of climate change can’t be avoided without a major transformation of food systems.

apnews.com

Cellule investigation de Radio France @investigationrf.bsky.social · Oct 3

🔴 Cum Cum : enquête sur ces milliards qui échappent au fisc

Le Crédit Agricole a reconnu que ces transactions financières étaient bien une fraude fiscale

💸 Le but : échapper à l'impôt sur les dividendes.
Mais 13 banques 🇫🇷 sont sous le coup d’enquêtes fiscales.

🔎 Anne-Laure Barral

Patrick Rafter @oceanandclimate.bsky.social · Oct 3

Today, we published a study long in the making on how upper and subsurface tropical Pacific waters responded (and maybe will adjust) to warmer global climate. Here’s the story of how we got here after 15 years. many authors but shout out @jfarmersalmanac.bsky.social
🌊
www.science.org/doi/10.1126/...

Persistent eastern equatorial Pacific Ocean upwelling since the warm Pliocene

Upwelling generates a nutrient-rich “cold tongue” in the eastern equatorial Pacific Ocean (EEP), with impacts on global climate, oceanic biological productivity, and the carbon cycle. The cold tongue ...

www.science.org

Fabrice Ardhuin @fabriceardhuin.bsky.social · Oct 1

Hello 🌊 ... thanks for AVISO for picking up on our recent paper about big waves ...

www.aviso.altimetry.fr/en/news/idm/...

Fabrice Ardhuin @fabriceardhuin.bsky.social · Oct 1

🌊. Today and tomorrow we have a User Consultation Meeting for @esaclimate.bsky.social SeaSate CCI project: projects.noc.ac.uk/seastatecci/...

there is a zoom link with the program: noc-ac-uk.zoom.us/s/89391592366

We'll be discussing satellite wave observation for climate.

Programme | Sea State Climate Change Initiative (CCI)

projects.noc.ac.uk

Fabrice Ardhuin @fabriceardhuin.bsky.social · Sep 27

La dernière fois que j'ai regardé il y avait au moins 2 îles: Sao Tomé et Principe ... donc "archipel" ?

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