Mike Tyka
@mtyka
#Climate, #science, #MachineLearning, #SciArt, #Biochemistry, #AI #Media #Art, #Sculpture, #GlassArt Climate Researcher @Google Prev: Protein Folding @UW with David Baker, PhD @Bristol
View out of Artemis II right now: Earth just got into view into this camera shot and will shortly be setting behind the moon from their vantage point www.youtube.com/live/6RwfNBt... 🤯
Finally we tried to simply turning off all the sophisticated biology modeling in ECCO-Darwin (i.e. the Darwin part). It turned out that this made virtually no difference to the OAE uptake trajectory - OAE-driven CO2 uptake appears to be primarily a function of bulk transport and gas exchange.
We also looked at the difference attributable to the divergent prediction of the horizontal plume trajectory (even if the gas exchange parametrization had been equal) and find that plume trajectory is significant. This is especially true of plumes end up going under ice or towards a high-wind zone.
We tried to figure out what other aspects of each model are responsible for the observed differences (other than subduction). The first suspect is the parameterization of wind speed and carbonate chemistry. The difference in wind params (and therefore gas exchange velocity) was the major influence.
It's interesting too that the models disagreed more for coastal injection sites but agreed better for sites further off-shore. This might have to do with the complexity of the near-shore water movements.
The inter-model variation is greater than the inter-annual variation within a model.
Unsurprisingly there is a strong correlation with the rate of subduction experienced by the alkalinity plume. We find this is the primary driver of the differences. If the model predicts faster subduction, the OAE efficiency suffers more.
Our new paper with Mengyang Zhou, Elizabeth Yankovsky, and Dustin Carroll is out as a preprint: egusphere.copernicus.org/preprints/20... "Substantial inter-model variation in OAE efficiency between the CESM2/MARBL and ECCO-Darwin ocean biogeochemistry models"
Incredible #cryo electron #tomography structures of the #mitochondrial membranes and the embedded respiratory chain www.researchgate.net/publication/...
Wow. That's quite an amazing rock Perseverance rover just found on Mars. Made of thousands of millimeter sizes spheres, some look hollow! science.nasa.gov/blog/shockin...
Incredible image of a protostar disk from JWST iopscience.iop.org/article/10.3... esawebb.org/images/potm2...
I'd love to see a similar comparison but not in terms of money but wattage or joules consumed. Human brain is what - 25W ?
TIL: In case you're wondering why every new drug name these days ends in "-mab" - there's more sense to drug names than I realized. -mab is "monoclonal antibody". www.bigmoleculewatch.com/2016/08/24/w...
Oh and don't forget to check out this beautiful interactive online tool where you can visualize all the Alkalinity plumes from all the runs: carbonplan.org/research/oae... built by Thomas Nicholas & CarbonPlan carbonplan.org/research/oae...
This spread is quite significant. We quantified the spread for all the simulated locations and found that equilibration occurs over areas spanning 1000s of kilometers. This poses significant challenges for high resolution regional models. However, the extent of spread is not uniform.
We also analyzed the contributions of surface gas exchange (e.g. wind speeds), surface carbonate chemistry and vertical transport and show that all three play a significant role in determining the equilibration kinetics and it's changes over time, as the plumes spread to other areas.
E.g. the subtropics early, fast equilibration is truncated due to subduction. But unlike at the poles, equilibration continues here, due to reemergence of the subducted alkalinity, albeit at a slower pace. This leads to two distinctive equilibration phases.
We also developed a simple three box model that accounts for the various shapes of the equilibration curve. The fitted parameters help rationalize the different latitudinal zones observed in the simulation.
These four regions are also shown below as individual examples. We show that the spread and subduction of the alkalinity deficient plume is quite different at different latitudes.
But then I realized there was something wrong, I worked through the deriv. in the paper and concluded there's a typo in the original paper (I'm reasonably certain about this but Kai, please correct me if you see this 👋). I'm pretty sure those should be minuses as those represent opposing processes.
Ok, so eerie experience. Trying to implement a detailed kinetic carbonate model from doi.org/10.1016/j.ma... . I thought, ok, let's try an LLM. I asked it to parse the paper and extract the equations. It did pretty well!