Samuel Jaccard
@jaccsa
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Climate Scientist and Associate Professor @fgse_UNIL, adjunct researcher @CentreOeschger | @IPCC_ch WG1 Lead Author | academic co-director @ClimactSuisse
Lausanne, Switzerland
Joined February 2014
Did you miss Bob Hazen’s lecture “Data-Driven Discoveries in Mineralogy” at UNIL last week? No worries, you can now watch the full talk online. Find the replay below! https://t.co/vXfkVY3yeJ
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Helikite up, science on! On board FOREL in South Greenland, the GreenFjord team deployed the helikite and carried out lake sampling, incubations, drones, and a science meeting — all framed by stunning views. 📸 Julia Schmale & team @epflcampus
#FOREL2025 #GreenFjord #EPFL
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1/3 🚨 Published today in @Nature We’re thrilled to celebrate the latest work by our colleague Dominik Gräff! 🎉 Using seafloor fiber-optic sensing, his team watched Greenland’s glaciers calve in real time & found something surprising 🌊🧊 📸: D. Gräff
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Depuis bien longtemps, la Berne fédérale se trompe sur la manière dont la Suisse est perçue aux Etats-Unis. Elle surestime sa position et ses leviers. Contrairement à d’autres pays, elle néglige l’importance du lobbyisme à Washington. Et ça a commencé bien avant Trump. 👇
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"No deep-sea mining approved as ISA Council ends, despite continued push to start a failing industry." See below the DSCC's press release for the closing of the International Seabed Authority's Council Meeting. https://t.co/iPEIHHdGyA
#DefendTheDeep #StopTheMachines
deep-sea-conservation.org
The International Seabed Authority (ISA) Council Meeting concluded this morning (21.7.25) without a decision to adopt a mining code and has previously reinforced that mining should not start without...
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Heat is a silent killer. The hottest June on record in Western Europe caused 2,300 deaths across 12 cities, of which 1,500 were down to the climate crisis (see link in comment). Subsidizing fossil fuels costs lives. https://t.co/EDoq2nLSQ0
climate.copernicus.eu
The European continent experienced two significant heatwaves in mid-June and late June-early July 2025. The first event peaked between 17 and 22 June, affecting large parts of western and southern...
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The #Glacier Loss Day is reached in Switzerland! From now on all melt that occurs on glaciers until October is unsustainable. This tipping point has only been reached so early in the record-shattering year 2022. Expect big ice loss due to the prolonged melt season and feedbacks
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Check out our new publication, led by Christel Hassler at @EPFL. In the Fe-limited Southern Ocean, most of the organic ligands that maintain Fe available for life are produced on site by phytoplankton and bacteria. @jaccsa @NisotopesCT @ICMCSIC
https://t.co/2VrA6LP9Tb
nature.com
Nature Communications - Most of the iron-binding ligands are from freshly biologically produced organic matter which likely controls iron biogeochemistry across the Southern Ocean. Our findings...
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📢conférence-vernissage mercredi 22 janvier à 17h30! Plongez à la rencontre de certains des plus anciens animaux connus dans le cadre d'une magnifique expo qui se tient jusqu'au 27 avril au Palais de Rumine. Organisé par l'@unil et le Naturéum. Infos👇 https://t.co/uwrSjyu6pp
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🚨We are filling a 5-year postdoc/junior lecturer position in Soil Biogeochemistry at @UNIL @UNIL_FGSE. Fully-funded, independent research on microbe-mineral-organic matter interactions, #climate, #soils. Deadline: Jan 30. Start: Sept 2025. #postdocjobs #phdchat #phdone Info👇
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This paper shows that X (formerly Twitter) is a toxic platform managed to polarize views and promote toxic interactions. Time to leave X! My next post will be to say goodbye and provide my new social media address in a non toxic, decentralized platform
nature.com
Nature Communications - Identifying patterns of polarization is important for understanding its root cause. Here, using Twitter data from 9 countries, the authors show that out-group mentions use...
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📣 The @VendeeGlobeENG started yesterday, and so the #data collection continues thanks to @OliverHeerOHOR ! We wish Ollie a safe journey around the🌍 & invite you to follow the Environmental Physics (UP) Group for regular updates on the science campaign👇 https://t.co/MX20g8kh8a
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@JustineMettraux @AlanRoura @OliverHeerOHOR @VendeeGlobe @VendeeGlobeENG Let's go, and see you in the Southern Ocean ! #ocean #race #sail
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D-1 to the start of the race to the #Southern #Ocean. It's easy to imagine how excited the racers are. Rendez-vous tomorrow with @JournalPolar stand, if you're in Les Sables d'Olonne. If not, we'll be back with an update on the 🧵. #regatta @VendeeGlobeENG @VendeeGlobe
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🇨🇭🇪🇺The SNSF is pleased to see continued progress in negotiations with the EU and hopes that full association to the #HorizonEurope research programme will soon be possible once again. This is of central importance for Swiss #research and the Swiss economy. https://t.co/DgYbK4hPQ8
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📌I have an open PhD position funded for 4 years on the topic of performing long-term climate simulations running seamlessly from the past into the future, including proxy comparisons. Get in touch if you are interested.📌 https://t.co/jIvhkAMvbd
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📌I have an open postdoc position (2 yr, with possibility of extension) on advancing fast Earth system models and performing long-term transient simulations on glacial-interglacial cycles working towards paleo-informed future projections: https://t.co/qRP0QoQMwc
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The Swiss Commission of Oceanography and Limnology met in Cadagno: a paradise to study lakes, geology, biology, microbiology … located at 2000m in Piora valley (Ticino). A place to visit #lagocadagno #limnology
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