Arthur Coquereau
@arthurcoquereau.bsky.social
42 followers 80 following 5 posts
I study ocean and climate variability using large ensembles 🌍🌍🌍🌍🌍 - AMOC aficionado - PhD Student at @lops_brest 🇫🇷
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Reposted by Arthur Coquereau
oceanseaicenpi.bsky.social
This week, the 2025 Arctic-Subarctic Ocean Fluxes (ASOF) workshop was hosted by ICM in Barcelona and thanks to @iasc-arctic.bsky.social cross-cutting workshop funding we could support the travel of 7 Early Career and Indigenous participants.
arthurcoquereau.bsky.social
[3/4] ANOVA allows to study the explanatory power of qualitative factors (here, different scenarios, models, ensemble members and time steps) on a quantitative variable (here, AMOC intensity). We can then track the main effect of each factor on variability and the interaction effects between them.
arthurcoquereau.bsky.social
[2/4] Key findings: (1) Three successive regimes of variability: (i) internally-driven (1850-1990), (ii) dynamical adjustment (1990-2050), (iii) forced (2050-), (2) Differences between forcing scenarios on AMOC intensity do not emerge until 2050, (3) Internal variability decreases as AMOC declines.
arthurcoquereau.bsky.social
[1/4] 📢 New Preprint Alert! 📢 Is the AMOC's fate already sealed until 2050? We've just dropped a preprint where we partition sources of #AMOC variability from 1850 to 2100 in #CMIP6 ensembles using ANOVA. In this thread, a quick summary of the key points and method! 👇 #Climate
Past, Present, and Future Variability of Atlantic Meridional Overturning Circulation in CMIP6 Ensembles
Abstract. The Atlantic Meridional Overturning Circulation (AMOC) is a key component of the climate system, exhibiting strong variability across daily to millennial timescales and significantly influen...
doi.org
arthurcoquereau.bsky.social
Does an increase in AMOC variability signal an imminent tipping point? In a recent article in GRL (@agu.org), authors explore the possibility of false positives (increased variance but no bistability) depending on gyre circulation intensity.
#AMOC #TippingPoint #Climate

doi.org/10.1029/2024...
Slowed Response of Atlantic Meridional Overturning Circulation Not a Robust Signal of Collapse
Critical Slowing Down (CSD) indicators can raise a false alarm of a nonexistent collapse when applied to an idealized Atlantic meridional overturning circulation (AMOC) model Applying CSD to the ...
doi.org