Nick Lutsko
@nick-lutsko.bsky.social
61 followers 140 following 28 posts
Assistant Professor of Climate Science at Scripps Institution of Oceanography/UCSD. More at sio-climatephysics.com
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nick-lutsko.bsky.social
And his two recent Stirring Tropics papers with Victor Mayta, which give a new picture of the tropical circulation
doi.org/10.1175/JCLI...
doi.org/10.1175/JCLI...
doi.org
nick-lutsko.bsky.social
Adames & Kim (2016) -- one of his first moisture mode/MJO papers
doi.org/10.1175/JAS-...

Adames & Wallace (2017) -- really careful analysis of the tropical atmospheric signature of El Nino
doi.org/10.1175/JAS-...
journals.ametsoc.org
nick-lutsko.bsky.social
Amazing news, Angel is such a deserving MacArthur Fellow!

Angel has transformed how we think about tropical dynamics and wave-convection interactions, and his work does such a great job blending pen-and-paper theory with observations.

Here are a few of my favorite papers of his:
uwmad-aos.bsky.social
We are thrilled and proud to share that AOS prof Ángel F. Adames Corraliza has been named a 2025 MacArthur Fellow!

Congrats, Ángel! The department is ecstatic for you. In addition to the MacArthur announcement linked below, check out the UW–Madison news release here: go.wisc.edu/r0ff84
Ángel F. Adames Corraliza
Advancing understanding of the forces that drive tropical weather patterns.
www.macfound.org
nick-lutsko.bsky.social
Interesting new @science.org paper by Spencer Hill et al shows that El Nino events weaken India's average monsoon rainfall, but *intensify* extreme precip.

They also give a neat mechanism: subsidence during El Niño dries the mid-troposphere over India...
nick-lutsko.bsky.social
Scientists reanalyzing Cassini data found evidence that Enceladus’ subsurface ocean contains complex prebiotic molecules. Work like this shows the importance of sustained investment in planetary science missions and of good data management and continuity

www.theguardian.com/science/2025...
Prospect of life on Saturn’s moons rises after discovery of organic substances
Scientists studying water vapour plume from Enceladus find presence of complex molecules that could harbour life
www.theguardian.com
nick-lutsko.bsky.social
Each approach comes with uncertainties about whether it will succeed, and interesting questions about equity and reproducibility. And this debate is happening just as we're starting to have long enough records to identify robust model-obs discrepancies
2/3
nick-lutsko.bsky.social
I wrote a short piece on the debate about the future of climate modeling: Should we pool resources to do km-scale "masterpiece" runs or focus on using ML to build data-driven models that can still do large ensembles? 1/3
nick-lutsko.bsky.social
This would leave no indirect costs going to the UC general fund (salaries, tuition support, equipment) or to the Opportunity Fund (faculty recruitment, GSR support, equipment)

Numbers from the 23/24 UC budget request
www.ucop.edu/uc-health/_f...
www.ucop.edu
nick-lutsko.bsky.social
~2/3 of federal research awards come from the NIH. If the mean OH rate is 50-60%,then capping at 15% would cut total UC overhead cost recovery by about 50%, to ~$500 mill

If other agencies implemented the same OH cap, indirect costs would more or less cover grant administration
nick-lutsko.bsky.social
Some context on the reduction in NIH overhead rates:

In 2021-22 UC's operating budget was ~$47 billion of which $987 mill came from indirect cost recovery (~2%). 20% of this went to grant and contract administration, ~45% to UC General Fund and ~35% to the UC "Opportunity Fund"
nick-lutsko.bsky.social
True “efficiency” would come from maximizing what we get out of these obs and developing (and executing) a plan for integrating ML into everything NOAA/NWS does
nick-lutsko.bsky.social
Hopefully the damage is just 5-10% staff cuts and “searching high and low for DEI”

It’s disappointing this is all a group of tech-minded people can think to do. Now should be an exciting time for thinking about modernizing NOAA: a golden age of earth obs +rapid ML advances in WF
nick-lutsko.bsky.social
2024 was the warmest year on record and it also had the largest recorded increase in atmospheric CO2 (+3.58ppm).

These are related: a strong El Niño drove much of the warming and reduced carbon uptake by drying out Northern Hemisphere land
nick-lutsko.bsky.social
Finally a caveat is Simpson et al (2023) find observed VP trends in the southwest US are < 0 but models predict >0. Many possible explanations, but suggests studies of future wildfires might underestimate drying. Another example of the importance of resolving model-obs biases
nick-lutsko.bsky.social
Many studies have found California precip becomes less frequent and more intense under warming (e.g., Swain et al 2018 @weatherwest.bsky.social ). The winter onset also seems to be delayed, though there’s much interannual variability
nick-lutsko.bsky.social
These are more difficult to tie to climate change – Guzman-Morales and Gershunov (2019) find reductions in the frequency and (to a lesser extent) intensity of Santa Ana winds, though the smallest reductions are in Nov-Dec-Jan
nick-lutsko.bsky.social
Summer fires (mostly in NoCal forests) are driven by temperature and humidity, so it’s easier to detect a climate signal. Fall fires (mostly SoCal brush fires) are driven by winds and depend on the timing of winter precip onset…
nick-lutsko.bsky.social
A good paper for learning about connection between California wildfires and climate change is
Williams et al (2019). They look at the historical record, but provide a nice overview of the different types of California fires and their climatic drivers…
nick-lutsko.bsky.social
...suggestive of shipping regulation changes, but it’s hard to be confident about this with such a short record and with such a simple counterfactual. Multidecadal variability (e.g., AMO, PDO) could also be important, but is hard to account for

Paper:
www.science.org/doi/10.1126/...
(5/5)
Recent global temperature surge intensified by record-low planetary albedo
In 2023, the global mean temperature soared to almost 1.5 kelvin above the preindustrial level, surpassing the previous record by about 0.17 kelvin. Previous best-guess estimates of known drivers, inc...
www.science.org
nick-lutsko.bsky.social
This careful analysis of the observations is really useful, but the counterfactual only considers 2020-2024, which is a very short time to identify trends or “emerging feedbacks”. The LCC decline does start in 2020 and seems to be mostly in the tropical Atlantic,
(4/5)