LightNews LightNews
banner
micheltsamados.bsky.social
@micheltsamados.bsky.social
300 followers 350 following 100 posts

Physicist, Associate Professor at CPOM, @ES_UCL. Study climate of polar regions. Also dynamics of complex systems. Main current interest : sea ice. https://www.ucl.ac.uk/earth-sciences/people/academic/dr-michel-tsamados

Videos
Environmental science 35%
Geology 32%
Posts Replies Media Videos
Pinned
micheltsamados.bsky.social
micheltsamados.bsky.social @micheltsamados.bsky.social · Dec 5
Check the short video of our project put together by the amazing #CINUK team and explaining the project here youtu.be/JKyvfs06T-4 @es-ucl.bsky.social
Sikuttiaq: Sea ice travel safety, Inuit Qaujimajatuqangit, sea ice monitoring | CINUK
YouTube video by British Antarctic Survey
youtu.be

micheltsamados.bsky.social
micheltsamados.bsky.social @micheltsamados.bsky.social · 16d
Problem is the big companies and media don't and they make it very clear to our politicians. Lets try and tilt the balance the way of the 99%

micheltsamados.bsky.social
micheltsamados.bsky.social @micheltsamados.bsky.social · 16d
#GEOL0022 all you ever wanted to know about the key role of the Southern Ocean in our climate system summarized in a great 5 minutes video by one of my students www.youtube.com/watch?v=f_zZ... Great work Billy Liu 👍.

See credits at the end for inspiration from @jbsallee.bsky.social and others...
The Southern Ocean
YouTube video by Xin Liu
www.youtube.com

Reposted by Anna O. Law, Carl T. Bergstrom, Philip N. Cohen , and 6 more

chicagotribune.com
Chicago Tribune @chicagotribune.com · 16d
A Naperville man was hauled away by federal immigration agents Thursday morning as his two sons watched, the older boy begging them not to hurt his father and tearfully asking for a chance to speak to him before they left.
As his two sons watch and cry, ‘Pa, te amo,’ federal agents arrest man outside of Naperville apartments
A Naperville man was hauled away by federal immigration agents Thursday as his two sons cried and begged for him not to be hurt.
trib.al

micheltsamados.bsky.social
micheltsamados.bsky.social @micheltsamados.bsky.social · 24d
As part of my ocean physics and climate change module #GEOL0022 students put together quick summaries of my previous class. Here is one of these presentation that really stand out due to the creativity and acting talents of its author James Ge. Great job James!

www.youtube.com/watch?v=A2MQ...
The Ocean Heat Budget Video Presentation
YouTube video by Jamez
www.youtube.com

micheltsamados.bsky.social
micheltsamados.bsky.social @micheltsamados.bsky.social · 29d
A new year of teaching Ocean Physics and Climate Change @ucl.ac.uk @es-ucl.bsky.social and the students are already producing some gems as part of their flipped classroom assignments.

Radiative Forcing by Elizabeth Goodwin:
www.youtube.com/watch?v=u8bT...
Radiative Forcing Summary Presentation
YouTube video by Elizabeth Goodwin
www.youtube.com

micheltsamados.bsky.social
micheltsamados.bsky.social @micheltsamados.bsky.social · Oct 9
😂

micheltsamados.bsky.social
micheltsamados.bsky.social @micheltsamados.bsky.social · Oct 4
I wrote a post (with ChatGPT's help) on my stepdad's mathematical theories. Interested to hear your thoughts... www.linkedin.com/posts/michel...
Here’s a provocative take I’d love your reactions to 👇 What if the “laws of physics” aren’t out there in nature at all—but are programs our brains run, written by evolution to keep organisms… | Mich...
Here’s a provocative take I’d love your reactions to 👇 What if the “laws of physics” aren’t out there in nature at all—but are programs our brains run, written by evolution to keep organisms alive? ...
www.linkedin.com

micheltsamados.bsky.social
micheltsamados.bsky.social @micheltsamados.bsky.social · Oct 3
Conflict of interest disclaimer: JL Krivine happens to be my step-dad ❤️

micheltsamados.bsky.social
micheltsamados.bsky.social @micheltsamados.bsky.social · Oct 3
Very thought provoking talk from a famous maths professor Jean-Louis Krivine with a possible explanation of the paradoxes of physics, the Curry–Howard correspondence, the brain and much more...Physicist friends and colleagues buckle up! English subtitles available

www.youtube.com/watch?app=de...
P&M, Jean-Louis Krivine - La correspondance preuves-programmes : une découverte capitale et ignorée
YouTube video by Archive Trust for Research
www.youtube.com

Reposted by Doerthe Tetzlaff, Mattias Hallquist, Christoph Scherber , and 2 more

rahmstorf.bsky.social
Prof. Stefan Rahmstorf @rahmstorf.bsky.social · Aug 30
Wow. Check this out.
Politicians actually trying to solve problems can achieve a lot!
www.washingtonpost.com/climate-solu...
Paris said au revoir to cars. Air pollution maps reveal a dramatic change.
Air pollution fell substantially as the city restricted car traffic and made way for parks and bike lanes.
www.washingtonpost.com

Reposted by S. J. Holmes, Michel Tsamados

davidho.bsky.social
David Ho @davidho.bsky.social · Aug 29
Let me rewatch The Day After Tomorrow to see what to expect.
Collapse of critical Atlantic current is no longer low-likelihood, study finds
Scientists say ‘shocking’ discovery shows rapid cuts in carbon emissions are needed to avoid catastrophic fallout
www.theguardian.com

micheltsamados.bsky.social
micheltsamados.bsky.social @micheltsamados.bsky.social · Aug 26
Hi Alex you are onto something and couplings between ice-shelves and sea ice and ocean are important areas of research. I am afraid I can't tell you anything in more detail.

micheltsamados.bsky.social
micheltsamados.bsky.social @micheltsamados.bsky.social · Aug 26
To sum up, I wouldn't call this a good news story as the recent slow down of sea ice extent is only one part of a complex Arctic landscape (ice volume, ecology, temperature). I also don't think that we can draw any confident projections that the current slow down will persist in the coming years.

micheltsamados.bsky.social
micheltsamados.bsky.social @micheltsamados.bsky.social · Aug 26
7/n In my experience (e.g. Gregory et al. 2020) sea ice is too thick in climate models and there are also issues with the feedback processes in both summer and winter in the models.

tc.copernicus.org/articles/16/...
Network connectivity between the winter Arctic Oscillation and summer sea ice in CMIP6 models and observations
Abstract. The indirect effect of winter Arctic Oscillation (AO) events on the following summer Arctic sea ice extent suggests an inherent winter-to-summer mechanism for sea ice predictability. On the ...
tc.copernicus.org

micheltsamados.bsky.social
micheltsamados.bsky.social @micheltsamados.bsky.social · Aug 26
6/n Another aspect of the study that is lacking some discussion and would be very interesting to investigate more is the so called 'model response uncertainty'. In other words how much of the model trends are due to deficiencies and biases in the models iopscience.iop.org/article/10.1...
Figure 3. Fractional contribution of model structure, emissions scenario, and internal variability to total uncertainty for percent of remaining sea ice cover in July, August and September (JAS) for the Central Arctic, Siberian Marginal Seas (Kara Sea, Laptev Sea, East Siberian Sea), and North American Marginal Seas (Chukchi Sea, Beaufort Sea, Canadian Archipelago). The solid white lines indicate the borders between sources of uncertainty, while the transparent white shading around those lines is the range of this estimate based on different estimates of internal variability in the MMLEA. All panels are for five-year mean projections of percent of remaining Arctic sea-ice cover relative to 1995–2014.

micheltsamados.bsky.social
micheltsamados.bsky.social @micheltsamados.bsky.social · Aug 26
5/n The authors briefly address this by looking at a model results on sea ice thickness but don't dive deeper into how their results hold when looking at the total sea ice volume. Satellite data on sea ice thickness exist (e.g. Landy et al. 2022). www.nature.com/articles/s41...
A year-round satellite sea-ice thickness record from CryoSat-2 - Nature
Deep learning and numerical simulations of CryoSat-2 radar altimeter data are used to generate a pan-Arctic sea-ice thickness dataset for the Arctic melt period.
www.nature.com

micheltsamados.bsky.social
micheltsamados.bsky.social @micheltsamados.bsky.social · Aug 26
4/n I think the study is good and sound but might hide some more nuanced aspects of sea ice decline. Sea ice extent is a simplistic metric that encompasses a complex 3D field into a 2D projection. Other metrics, such as sea ice age for example, paint an even more alarming picture.

micheltsamados.bsky.social
micheltsamados.bsky.social @micheltsamados.bsky.social · Aug 26
3/n Similar pauses or hiatuses are natural in the climate system and were extensively scrutinised in the past in the context of global climate warming (see 1998-2013 period).

en.wikipedia.org/wiki/Global_...

micheltsamados.bsky.social
micheltsamados.bsky.social @micheltsamados.bsky.social · Aug 26
2/n By contrasting model results and satellite observations over the 2005-2024 period this study documents clearly a 'slowdown' or 'pause' in Arctic sea ice extent (the area where sea ice fraction is above 15%).

micheltsamados.bsky.social
micheltsamados.bsky.social @micheltsamados.bsky.social · Aug 26
1/n Some thoughts from me on the 'good news' story about slow down of Arctic sea ice decline that came out in the Guardian last week following a paper published in GRL

www.theguardian.com/environment/...

Reposted by David Johnson, Michel Tsamados

zacklabe.com
Zack Labe @zacklabe.com · Aug 7
The extraordinary loss of August #Arctic sea ice thickness over the last four decades...

Data available at psc.apl.uw.edu/research/pro.... More info at climatedataguide.ucar.edu/climate-data...
Four polar stereographic maps showing Arctic sea ice thickness during August in 1985-1994, 1995-2004, 2005-2014, and 2015-2024. There is ice thinning in nearly all locations. Ice thickness ranges from 0 to 5 meters.

Reposted by Michel Tsamados

alexlipp.github.io
Alex Lipp @alexlipp.github.io · Jul 31
eartharxiv.org/repository/v...
In our new preprint we describe in detail the software & workflows behind www.SewageMap.co.uk! One for the open environmental data nerds out there :) 💩 🧑‍💻 🏞️

micheltsamados.bsky.social
micheltsamados.bsky.social @micheltsamados.bsky.social · Jul 8
Horrendous decision to replace those lovely line judges that contribute to the spirit of #Wimbledon by a defective and inhuman robot AI system. Why don't we replace the empire and players too and commentators and ball boys and girls. Or just switch off our TV.

Reposted by A. E. Dessler, Arthur Geßler, Ana Bastos , and 13 more

davidho.bsky.social
David Ho @davidho.bsky.social · May 4
I think a lot about what Carl Sagan said in one of his final interviews.
"WE'VE ARRANGED A society based on science and technology, in which nobody understands anything about science technology. And this combustible mixture of ignorance and power, sooner or later, is going to blow up in our faces. Who is running the science and technology in a democracy if the people don't know anything about it?" "Science is more than a body of knowledge, it's a way of thinking. A way of skeptically interrogating the universe with a fine understanding of human fallibility. If we are not able to ask skeptical questions, to interrogate those who tell us that something is true, to be skeptical of those in authority, then we're up for grabs for the next charlatan, political or religious, who comes ambling along."

micheltsamados.bsky.social
micheltsamados.bsky.social @micheltsamados.bsky.social · Jun 27
Last but not least session for me at #LPS25 with Rosie Willatt from @es-ucl.bsky.social telling us about up future opportunities in polar earth observation and upcoming satellites 🛰

micheltsamados.bsky.social
micheltsamados.bsky.social @micheltsamados.bsky.social · Jun 26
Valentin Ludwig summarising our results from the SIN’XS Sea Ice-thickness product iNter-comparison eXerciSe #lps25 @es-ucl.bsky.social sinxs.noveltis.fr

micheltsamados.bsky.social
micheltsamados.bsky.social @micheltsamados.bsky.social · Jun 26
Another amazing presentation on our Inuit led safe travel on sea ice projects by Randy Scharien #smartice #lps25

micheltsamados.bsky.social
micheltsamados.bsky.social @micheltsamados.bsky.social · Jun 26
Great talk on our safe travel on sea ice projects in Inuit Nunangat by Neil Brubacher in collaboration with the amazing Inuit social enterprise #smartice #lps25 @neilbrub.bsky.social

micheltsamados.bsky.social
micheltsamados.bsky.social @micheltsamados.bsky.social · Jun 26
Next GAIA: A Global, Multimodal, Multiscale Vision-Language Dataset for Remote Sensing Image Analysis Angelos Zavras, Dimitrios Michail, Xiao Xiang Zhu, Beg"um Demir, loannis Papoutsis from Orion lab and national Athens observatory and national technical university of Athens 🇬🇷 #lps25

micheltsamados.bsky.social
micheltsamados.bsky.social @micheltsamados.bsky.social · Jun 26
Exciting session this morning on large langage models application to Earth Observations #lps25 with Solene Debuysere and Madleen Bultez first #DIVA #controlnet