Jean Jouzel

Glacial earthquakes are a special type of earthquake generated in cold, icy regions. First discovered in the northern hemisphere more than 20 years ago, these quakes occur when huge chunks of ice fall from glaciers into the sea. Until now, only a very few have been found in the Antarctic. In a new study soon to be published in Geophysical Research Letters, I present evidence for hundreds of these quakes in Antarctica between 2010 and 2023, mostly at the ocean end of the Thwaites Glacier – the so-called Doomsday Glacier that could send sea levels rising rapidly if it were to collapse.

We are hurtling toward climate chaos. The planet's vital signs are flashing red. The consequences of human-driven alterations of the climate are no longer future threats but are here now. This unfolding emergency stems from failed foresight, political inaction, unsustainable economic systems, and misinformation. Almost every corner of the biosphere is reeling from intensifying heat, storms, floods, droughts, or fires. The window to prevent the worst outcomes is rapidly closing. In early 2025, the World Meteorological Organization reported that 2024 was the hottest year on record (WMO 2025a). This was likely hotter than the peak of the last interglacial, roughly 125,000 years ago (Gulev et al. 2021, Kaufman and McKay 2022). Rising levels of greenhouse gases remain the driving force behind this escalation. These recent developments emphasize the extreme insufficiency of global efforts to reduce greenhouse gas emissions and mark the beginning of a grim new chapter for life on Earth.

We are an international group of researchers and practitioners interested in the emerging fields of post-growth and ecological macroeconomics. Our aim is to advance economic theory, methodology and policy in order to adequately address some of the biggest challenges of our time: climate change, rising inequality, and financial instability.

Four Prime Ministers in twelve months. Social protests in the streets. Extreme parties rising in the polls. President Macron, once seen as Europe's great reformer, seems politically finished. But what if France's paralysis is not an exception - what if it shows Europe's future?

Les Israéliens ont récemment livré aux autorités françaises leur propre bilan des frappes qui ont visé, en juin, l’arsenal nucléaire de Téhéran. Ces échanges sont précieux pour Paris car, selon les informations du « Monde », les services de renseignement américains ont cessé toute coopération avec leurs partenaires européens sur le dossier nucléaire iranien.

2024 was the hottest year on record [1], with global temperatures exceeding 1.5 °C above preindustrial climate conditions for the first time and records broken across large parts of Earth’s surface. Among the widespread impacts of exceptional heat, rising food prices are beginning to play a prominent role in public perception, now the second most frequently cited impact of climate change experienced globally, following only extreme heat itself [2]. Recent econometric analysis confirms that abnormally high temperatures directly cause higher food prices, as impacts on agricultural production [3] translate into supply shortages and food price inflation [4, 5]. These analyses track changes in overall price aggregates which are typically slow-moving, but specific food goods can also experience much stronger short-term price spikes in response to extreme heat.

For decades, the surface of the polar Southern Ocean (south of 50°S) has been freshening—an expected response to a warming climate. This freshening enhanced upper-ocean stratification, reducing the upward transport of subsurface heat and possibly contributing to sea ice expansion. It also limited the formation of open-ocean polynyas. Using satellite observations, we reveal a marked increase in surface salinity across the circumpolar Southern Ocean since 2015. This shift has weakened upper-ocean stratification, coinciding with a dramatic decline in Antarctic sea ice coverage. Additionally, rising salinity facilitated the reemergence of the Maud Rise polynya in the Weddell Sea, a phenomenon last observed in the mid-1970s.

Le programme nucléaire iranien a été retardé d'environ de deux ans par les frappes américaines décidées par Donald Trump, selon des évaluations du renseignement américain, a indiqué le Pentagone mercredi.

L'Iran dispose des capacités techniques pour recommencer à enrichir de l'uranium d'ici "quelques mois", a indiqué le patron de l'Agence internationale de l'énergie atomique (AIEA) Rafael Grossi dans une interview à la chaîne américaine CBS.

L'Iran dispose des capacités techniques pour recommencer à enrichir de l'uranium d'ici "quelques mois", a indiqué le patron de l'Agence internationale de l'énergie atomique (AIEA) Rafael Grossi dans une interview à la chaîne américaine CBS. Près d'une semaine après les bombardements américains sur les sites nucléaires de Fordo, Natanz et Ispahan, tous s'accordent, même Téhéran, à dire que ces centrales ont été considérablement endommagées, mais des questions demeurent sur l'efficacité réelle de ces frappes. Le président américain Donald Trump a par exemple suggéré que le programme nucléaire iranien avait été retardé de "plusieurs décennies".