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micheltsamados.bsky.social
@micheltsamados.bsky.social
300 followers 350 following 110 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
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micheltsamados.bsky.social
Our paper led by Peigen LIn on the related topic of Arctic Beaufort Gyre fresh water accumulation is available here www.nature.com/articles/s41...
a, Geographic map of the Arctic Ocean with an enlarged view of the study region (black box). The schematic BG is marked by the yellow circle. The BG region is delimited by 130–180° W, 81° N and 300 m isobath (thick purple line), over which area averages (± standard errors) are computed, shown in b–d. The bathymetry from the International Bathymetric Chart of the Arctic Ocean v3 is coloured, with the isobaths of 40, 70, 150, 250, 500 m in grey, and 100 and 300 m highlighted in black. b, The annual mean BG DOT (m). c, The annual mean BG FWC (m) and volume (×104 km3) estimated using the historical hydrographic data (FWC1, magenta) and using the DOT + GRACE data (FWC2, green). d, The annual mean BG thickness anomalies (m) relative to 2003 of the layer from the surface to the top of the cold halocline (yellow), the CHL beneath this (purple) and the sum of the two layers (orange). The standard error, shown by the bars, is the standard deviation divided by square root of the degrees of freedom, where the degrees of freedom for each year (ranging from 12 to 71) are computed using an integral timescale of three days for the hydrographic data and one month for the monthly satellite data. The dashed lines are the linear trends in the early and late periods, and the black lines in b and c denote the linear trends of DOT and FWC1 over the full study period, respectively. The trends were computed using the time series of annual mean variables.
November 20, 2025 at 12:17 PM
micheltsamados.bsky.social
Scary stuff showing that the UK is in the range of this AMOC tipping point induced large cooling area! @ucl.ac.uk and the UK is working on this topic with various projects already funded but also in the pipelines.
November 17, 2025 at 7:57 AM
micheltsamados.bsky.social
Scary indeed! Something to talk about with my ocean physics and climate change class ahead of our lecture on the Thermohaline Circulation 😱 #GEOL0022 @es-ucl.bsky.social
November 14, 2025 at 1:06 PM
micheltsamados.bsky.social
3/3 The role of Arctic freshwater in shaping North Atlantic currents
Supervisors: Alessandro Silvano, Louis Clément, Christine Gommenginger (Southampton), Michel Tsamados (UCL), Margaret Lindeman (Harvard)
Deadline: 8th January 2026
www.findaphd.com/phds/project...
The role of Arctic freshwater in shaping North Atlantic currents at University of Southampton on FindAPhD.com
PhD Project - The role of Arctic freshwater in shaping North Atlantic currents at University of Southampton, listed on FindAPhD.com
www.findaphd.com
November 14, 2025 at 1:00 PM
micheltsamados.bsky.social
2/3 Forecasting the ecosystem and biogeochemical responses to sea ice change in the Southern Ocean
Supervisors: Lavenia Ratnarajah (UCL), Louisa Van Zeeland (Alan Turing Institute), Michel Tsamados (UCL)
Deadline: 14th January 2026
unrisk-cdt.ac.uk/projects/for...
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November 14, 2025 at 1:00 PM
micheltsamados.bsky.social
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%
October 26, 2025 at 9:03 AM
micheltsamados.bsky.social
😂
October 9, 2025 at 11:38 AM
micheltsamados.bsky.social
Conflict of interest disclaimer: JL Krivine happens to be my step-dad ❤️
October 3, 2025 at 9:48 AM
micheltsamados.bsky.social
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.
August 26, 2025 at 9:14 PM
micheltsamados.bsky.social
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.
August 26, 2025 at 3:57 PM
micheltsamados.bsky.social
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
August 26, 2025 at 3:57 PM
micheltsamados.bsky.social
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.
August 26, 2025 at 3:55 PM