Physicist; Senior Scientist @ CNRS; Invited professor @ ULB Satellite remote sensing experthttps://bsky.app/profile/cathyclerbaux.bsky.socialhttps://bsky.app/profile/cathyclerbaux.bsky.social/post/3mjdauklpjk2xJapanese cherry blossoms are beautiful right now. They also serve as a proxy for global warming. Records kept in Japan since the year 812 show that the flowering dates have shifted (on average) by about ten days.12 Apr 2026 21:04 +0000at://did:plc:gesfh3kczdxboyvfgviz2er4/app.bsky.feed.post/3mjdauklpjk2xhttps://bsky.app/profile/cathyclerbaux.bsky.social/post/3mejs26gw6s2zJanuary 2026: warmer than usual in the west, and very cold in the east as seen by IASI/Metop10 Feb 2026 20:21 +0000at://did:plc:gesfh3kczdxboyvfgviz2er4/app.bsky.feed.post/3mejs26gw6s2zhttps://bsky.app/profile/cathyclerbaux.bsky.social/post/3mcz66e2nl22oIn 2025, wind and solar power generated more electricity than fossil fuels in Europe. This was also the case in more than half of European countries Source : https://ember-energy.org/latest-insights/european-electricity-review-202622 Jan 2026 12:18 +0000at://did:plc:gesfh3kczdxboyvfgviz2er4/app.bsky.feed.post/3mcz66e2nl22ohttps://bsky.app/profile/cathyclerbaux.bsky.social/post/3m4gxnatzx22kHurricane Melissa passing over the Caribbean, as seen by the IASI satellite, which “observes” cloud temperatures. Winds exceeded 250 mph!30 Oct 2025 22:02 +0000at://did:plc:gesfh3kczdxboyvfgviz2er4/app.bsky.feed.post/3m4gxnatzx22khttps://bsky.app/profile/cathyclerbaux.bsky.social/post/3m2jhpkr3a22pMethane (CH4) is a greenhouse gas. You've all heard that cow farts contribute to global warming, but it's actually cow burps that release CH4...06 Oct 2025 11:04 +0000at://did:plc:gesfh3kczdxboyvfgviz2er4/app.bsky.feed.post/3m2jhpkr3a22phttps://bsky.app/profile/cathyclerbaux.bsky.social/post/3lxuhlbjo4c2nThere you go, the ozone hole that returns every year, but is no longer growing. Proof that international environmental regulations work! On the left are temperatures in the polar vortex, on the right are ozone concentrations for the last 30 days.02 Sep 2025 15:45 +0000at://did:plc:gesfh3kczdxboyvfgviz2er4/app.bsky.feed.post/3lxuhlbjo4c2nhttps://bsky.app/profile/cathyclerbaux.bsky.social/post/3lwtt2ett6k2jIASI-NG - Day 8: Engineers found this image in the launch videos! The raptor survived 😀20 Aug 2025 16:13 +0000at://did:plc:gesfh3kczdxboyvfgviz2er4/app.bsky.feed.post/3lwtt2ett6k2jhttps://bsky.app/profile/cathyclerbaux.bsky.social/post/3lwazliocss2kMetop-SG was launched last night by Ariane 6, with the IASI-NG infrared remote sensor onboard ! It is the continuation of the IASI program launched 18 years ago. See our best-of here : youtu.be/87LoUXFBjx8 New discoveries to be expected, as the instrument has better instrumental specifications. https://youtu.be/87LoUXFBjx813 Aug 2025 04:49 +0000at://did:plc:gesfh3kczdxboyvfgviz2er4/app.bsky.feed.post/3lwazliocss2khttps://bsky.app/profile/cathyclerbaux.bsky.social/post/3lti4fjpi7k2sA look back at the exceptional heatwave at the end of June/beginning of July in France and Belgium: > 35°C measured at ground level for a week, that's 6-8°C higher than the average for the previous 15 years on the same dates.08 Jul 2025 20:13 +0000at://did:plc:gesfh3kczdxboyvfgviz2er4/app.bsky.feed.post/3lti4fjpi7k2shttps://bsky.app/profile/cathyclerbaux.bsky.social/post/3lsjuqkks4k2yA very sunny June in Europe, as seen from space26 Jun 2025 19:36 +0000at://did:plc:gesfh3kczdxboyvfgviz2er4/app.bsky.feed.post/3lsjuqkks4k2yhttps://bsky.app/profile/cathyclerbaux.bsky.social/post/3loonurde422aGuess how much of the ocean floor humans have visually explored? Less than 0.001%, the size of the blue square shown on the map of Belgium in the image below. More in this paper : https://www.science.org/doi/10.1126/sciadv.adp860208 May 2025 19:35 +0000at://did:plc:gesfh3kczdxboyvfgviz2er4/app.bsky.feed.post/3loonurde422ahttps://bsky.app/profile/cathyclerbaux.bsky.social/post/3lo3ynxtwuc2aA good summary of the media speculations for the recent electricity black out here : https://www.carbonbrief.org/qa-what-we-do-and-do-not-know-about-the-blackout-in-spain-and-portugal01 May 2025 09:28 +0000at://did:plc:gesfh3kczdxboyvfgviz2er4/app.bsky.feed.post/3lo3ynxtwuc2ahttps://bsky.app/profile/cathyclerbaux.bsky.social/post/3lgxuqyetrs2cThese 2 maps compare mortality in urban areas in Europe, between 2015 and 2099, for an “optimistic” and a “pessimistic” scenario. In green, the lives gained where it will be less cold; in purple, the excess mortality due to heat peaks. It's the Mediterranean region that's taking the biggest hit.30 Jan 2025 16:11 +0000at://did:plc:gesfh3kczdxboyvfgviz2er4/app.bsky.feed.post/3lgxuqyetrs2chttps://bsky.app/profile/cathyclerbaux.bsky.social/post/3lgjdjaf3m22f24 Jan 2025 21:25 +0000at://did:plc:gesfh3kczdxboyvfgviz2er4/app.bsky.feed.post/3lgjdjaf3m22fhttps://bsky.app/profile/cathyclerbaux.bsky.social/post/3lgi2gppkyk2pIt's not moving fast enough, but it's heading in the right direction...24 Jan 2025 09:10 +0000at://did:plc:gesfh3kczdxboyvfgviz2er4/app.bsky.feed.post/3lgi2gppkyk2phttps://bsky.app/profile/cathyclerbaux.bsky.social/post/3lfhbnvciwc23The 1.6°C temperature increase recorded in 2024 is a bit puzzling... more in this paper (in French): https://theconversation.com/pourquoi-le-record-de-temperatures-en-2024-est-une-surprise-pour-les-scientifiques-24711911 Jan 2025 08:21 +0000at://did:plc:gesfh3kczdxboyvfgviz2er4/app.bsky.feed.post/3lfhbnvciwc23https://bsky.app/profile/cathyclerbaux.bsky.social/post/3lczyi7oick2jThere are around 600 active volcanoes, with some 60 eruptions recorded every year. This image shows the sulfur dioxide (SO2) emitted by 4 volcanoes and carried by the winds, as observed by satellite in November.11 Dec 2024 14:42 +0000at://did:plc:gesfh3kczdxboyvfgviz2er4/app.bsky.feed.post/3lczyi7oick2jhttps://bsky.app/profile/cathyclerbaux.bsky.social/post/3lbslhyrlz42zCold drop in Valencia, as seen by the IASI thermal infrared satellite25 Nov 2024 22:36 +0000at://did:plc:gesfh3kczdxboyvfgviz2er4/app.bsky.feed.post/3lbslhyrlz42z