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LegraLeGra

@atthenius.bsky.social
2.9K followers 5.4K following 1.2K posts

#Climate scientist @ #GISS => #nyc & #Columbia Uni Mom from WestTX #bikeNYC #bike #NYCbike Mostly find me Here: fediscience.org/@atthenius Personal acct.

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Reposted by LegraLeGra
geotone.bsky.social @geotone.bsky.social · 27/09/2026
Looking in the street earlier during the Nor’easter high tide. September26, 2026 Long Island, New York. #WeekLforLookingin #AlphabetChallenge #EastCoastKin #WestCoastKin #CoastalLiving #Noreaster #LongIsland #Canoeing #Floodzone
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LegraLeGra @atthenius.bsky.social · 26/09/2026
Nyc does have incredible resources to look up how vulnerable to climate risks - heat - your neighborhood is—> Bensonhurst is a 4 out of 5 vulnerability wise. If I lived here, I would say yes to more trees, less asphalt, more parks. a816-dohbesp.nyc.gov/IndicatorPubli…
Heat vulnerability index for nyc neighborhoods on a scale of 1 to 5 that is color coded. 

This post is about Bensonhurst which is highlighted in green as 4 of 5.
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LegraLeGra @atthenius.bsky.social · 25/09/2026
I think we are dropping our @citibikenyc.bsky.social membership this year. It’s not worth it. Yesterday $24 for upper east side to Inwood is an indictment. It’s cheaper to take a cab.
Citibike ride for a member upper east side to Inwood. Cost $24. Distance 11.5 miles.
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LegraLeGra @atthenius.bsky.social · 25/09/2026
Coastlines in the #NYC metro region are flooding today and over the weekend due to Nor'Easter Nolo. Our infrastructure -- even BRAND NEW NYC -- is not prepared for sea level rise. We aren't even well prepared for flooding from this Nor'Easter.
NYC Parks and Columbia University rebuilt this boat launch into the Harlem River about a year ago. It looks like it is maxed out today, about an hour off of the local high tide.this should be a ramp down to the water but it is flat and at risk of bowing upward.NYC Parks rebuilt this boat launch after Hurricane Sandy in 2012. It looks like it is maxed out right now and may break with the September 2026 Extratropical Cyclone / Nor'easter Nolo. The Henry Hudson Bridge and Harlem River are in the background. The tidal marsh of Inwood Hill Park has jumped its banks. A 20' wide park path is inundated. Several parks benches are in the water. NOAA Tides and Currents Timeseries for Sep 24-26, 2026 for The Battery, NYC. It shows minor to moderate flooding at high tide.
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Costa Samaras @costasamaras.com · 25/09/2026
This week, we published the first paper in the U.S. Climate Collection titled, "Research Priorities for Robust Climate Assessments in the United States". The paper was led by Melissa Kenney, @bobkopp.net, & me, with 175 authors helping outline climate risks. cee.engineering.cmu.edu/news/2026/09...
cee.engineering.cmu.edu
CMU faculty helps lead new efforts on climate assessment research
CMU faculty helps lead new efforts on climate assessment research - Civil and Environmental Engineering
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Kevin Anchukaitis @thirstygecko.bsky.social · 23/09/2026
Congratulations to all the awardees, especially new AGU Fellows John Chiang, @jfasullo.bsky.social, Gisela Winckler, and @climatedynamics.bsky.social !
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Jon Orcutt @jonorcutt.bsky.social · 23/09/2026
Just doing a bike lane instead of pedestrianizing the rest & making it the East Side’s High Line would be a big missed opportunity (especially w the MTA digging up Park Ave in the 40s & 50s for a decade+)
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LegraLeGra @atthenius.bsky.social · 23/09/2026
Look what my colleague found. Happened in my neighborhood: a charter school opened and gridlock when 65% of kids arrive to school by car. This in a neighborhood where 2 of 3 households don’t even have access to a car. 👀 🧐
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LegraLeGra @atthenius.bsky.social · 23/09/2026
This awful story of two high school girls killed by a truck driver who failed to yield and turned into them is awful. Worse is reporting emphasizing they were riding two on an electric citibike- as if a single kid on a traditional bike would’ve had any different outcome. This story gets it right.
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Transportation Alternatives @transalt.org · 22/09/2026
We’re counting on the City of New York to fix this chaotic intersection to make it safe. That means turn calming, protected bike infrastructure, and a protected bike intersection to prevent crashes and tragedies like this from ever happening again.
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Erik Noonan @eriknoonan.bsky.social · 23/09/2026
Cities should be paying people to bike. Cities should be buying people e-bikes. Cities should be rewarding people for convincing neighbors to ride bikes. Every trip by bike is a net financial gain socially. And it compounds, the more people who do it.
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Miser @misernyc.bsky.social · 22/09/2026
NYC DOT is hiring for a ton of jobs to scale up bike lane and greenway implementation, if anyone is interested. We really need them fully staffed with great people, so please pass around. cityjobs.nyc.gov/jobs?q=micro...
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Open Plans @openplans.org · 22/09/2026
🚗 Private cars are NYC's 3rd-largest source of emissions, right behind homes and businesses. Join our Climate Week panel "Reducing Driving as Climate Action" to explore what's worked to cut driving and clean up our air. 🗓️ 9/24 | 📍 Brooklyn Borough Hall RSVP: luma.com/parking-70cz
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Zeke Hausfather @zekehausfather.com · 22/09/2026
The world has made real progress in steering away from some of the darkest climate futures where global emissions doubled (or more) this century. But as David Wallace-Wells and I note in today's NYT, we are not out of the woods yet, and climate uncertainty is not our friend: www.nytimes.com/2026...
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TalkTeaV @talkteav.bsky.social · 20/09/2026
Bicycle helmets will fill the Grand Concourse when the Tour de Bronx returns Oct. 4 for its 32nd ride. Cyclists will start at 161st Street and Grand Concourse, choose from three routes, and finish at the New York Botanical Garden. #newyorkcity #bronxevents #bikenyc www.talkteav.com/tour-de-bron...
talkteav.com
Tour de Bronx Returns for Its 32nd Ride Across the Borough
More than three decades after the first Tour de Bronx, thousands of cyclists are preparing for another trip through the borough Oct. 4 with three cycling routes.
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Lamont-Doherty Earth Observatory @lamont.columbia.edu · 19/09/2026
💡 Today I Discovered (TID): Chasing Mystery Algal Bloom in Mid-Atlantic Bight This year, an extraordinary phytoplankton bloom stretched across coastal waters from MA to NJ. What caught attention of The Goes-Gomes Lab was not just its size, but who was blooming. Learn more: bit.ly/4AobRNC
Goes-Gomes Lab Manager Gia Wu with NYC DEP team. Credit: Jesus Marte, NYC DECEutreptiella. Credit: Gia WuGia Wu making radiometric measurements. Credit: Jesus Marte, NYC DECNOAA satellite image of harmful algal blooms. Credit: NOAA CoastWatch
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Open Plans @openplans.org · 21/09/2026
Happy Climate Week! Join us on Thursday at Brooklyn Borough Hall where we’ll be tackling the climate elephant in the room; driving. RSVP here: luma.com/parking-70cz
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Streetsblog NYC @nyc.streetsblog.org · 20/09/2026
The top cop's decision came even though the NYPD's patrol guide prohibits both excessive force and bars officers from parking on the sidewalk.
buff.ly
NYPD Commissioner Tisch Declined To Punish Cops Who Used Force So Other Cops Could Park Illegally - Streetsblog New York City
The top cop's decision came even though the NYPD's patrol guide prohibits both excessive force and bars officers from parking on the sidewalk.
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Jenna Norton @jenna-m-norton.bsky.social · 20/09/2026
Russell Vought wants to be in charge of #ScienceDeathPanels at NIH. Congress has made it pretty clear they don’t want political appointees in charge of funding decisions. Science community: it’s time to get loud (again)! www.politico.com/news/2026/09...
politico.com
Trump asked budget chief to draft order bringing health research funding under his control
The move came after the NIH director refused Trump’s request to cut Harvard grants in an Oval Office meeting.
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Astronomer Royal for Scotland | Catherine Heymans @astroroyalscot.bsky.social · 20/09/2026
NASA picture of the day today is a real 🏴󠁧󠁢󠁳󠁣󠁴󠁿beauty! This is a composite image of the ~5000yo Callanish Stones on the Isle of Lewis. The amazing Giuseppe Petricca has only gone and photographed the Sun at noon there, every few days, for a whole year. #Dedication 🔭🧪👌 ℹ️: science.nasa.gov/image-articl...
The imposing Callanish Stones stand talk with their shadows spanning out across the glass.  It's a super clear sky, but looks cold. Above the central stone is a strange figure-of-8 shape of dots.  This is the location of the Sun, at noon, on various different days across the year.
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27 UNIHTED @27unihted.bsky.social · 20/09/2026
@standupforscience.net released their America’s Compact for Higher Education campaign that pushes back in a united front against this administration’s authoritarian control of U.S. colleges and universities. www.standupforscience.net/sufs-compact...
standupforscience.net
Demand your school's leadership publicly endorse America's Compact for Higher Education — STAND UP FOR SCIENCE
Email your school's president urgently asking them to publicly endorse America's Compact for Higher Education
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Catherine Rampell @crampell.bsky.social · 20/09/2026
It really is striking how many authoritarian states have ended up in this exact same place, where the leader seizes control of scientific inquiry. Lysenkoism in the Soviet Union, Aryan Physics in the Third Reich, Great Leap Forward (also related to Lysenko) in China.
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Kate Marvel @drkatemarvel.bsky.social · 19/09/2026
My hot take on AI and climate change is that I would not like to be killed by either of them
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themedici.bsky.social @themedici.bsky.social · 19/09/2026
wapo.st/3UPK3BP
wapo.st
Vought pushes for scrutiny of NIH grants in Oval Office clash
A heated debate took place in the Oval Office on Friday, with some Trump officials accusing the National Institutes of Health of funding grants that conflict with the president’s agenda.
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Clarence Eckerson Jr./Streetfilms @streetfilms.bsky.social · 17/09/2026
I’m at NYC 2026 #GreenwaysSummit and who do I run into but former #Seattle Mayor @mayormcginn.bsky.social (now of @americawalks.bsky.social) who used Streetfilms when running for office & was very generous to allow me to ride with him to City Hall from his home 15 years ago for a famous Streetfilm!
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Jon Orcutt @jonorcutt.bsky.social · 17/09/2026
This is good, though I'd like to know the dimensions of the bikeway (reporters need ask this!). Let's stop building for 2005 #bikenyc traffic with 8-foot 2-way bikeways
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StreetsPAC @streetspac.org · 17/09/2026
The 2026 NYC Greenways Summit Is underway! You can stream it all live here: greenways.nyc/2026-nyc-gre...
greenways.nyc
2026 NYC Greenways Summit - NYC Greenways Coalition
The NYC Greenways Coalition will convene the third NYC Greenways Summit September 17-18, 2026. Space will be limited, and registration will be required to
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Brad Johnson @climatebrad.hillheat.com · 16/09/2026
oh damn @emdashsanders.bsky.social and @rebleber.bsky.social teamup just dropped #climateweeknyc
pointsourcenews.org
Introducing Point Source, reporting that exposes the bad actors on climate change
A new publication from Emily Sanders and Rebecca Leber
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NPR @npr.org · 15/09/2026
NASA employees say they've lost vital equipment and staff needed to make sophisticated spacecraft amid the agency's abrupt relocations over the past several months. n.pr/3SK34oz
n.pr
NASA rushed engineers out of their labs. They say it risks future space missions
NASA employees say they've lost vital equipment and staff needed to make sophisticated spacecraft amid the agency's abrupt relocations over the past several months.
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Jessica Tierney @leafwax.bsky.social · 15/09/2026
I rarely post on here (apologies) but: @danibarra.bsky.social and I have some thoughts about CO2 in blue ice 🧊 🧐 Preprint is up... essopenarchive.org/doi/full/10....
essopenarchive.org
A reassessment of proxy signal preservation in Antarctic blue ice: Implications for Plio-Pleistocene CO2 | ESS Open Archive
Marks-Peterson et al. (2026) measured greenhouse gas concentrations in “blue” ice from the Allan Hills, Antarctica and concluded that atmospheric CO2 was broadly stable over the past ~3 million years....
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BergenBikeBusBK @bergenbikebus.bsky.social · 15/09/2026
Hi y'all! Our first #BikeBus of the fall season is TOMORROW & we are pumped to ride together to school again. Join us at the start or along the way. Our live tracker goes live at 7:15! See you in the AM ✨🚲 Let's roll!
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Andrew Dessler @andrewdessler.com · 14/09/2026
On The Climate Brink: The Atmosphere Just Set a Water Vapor Record. Aug. 2026 probably had more water vapor in the atmosphere than any month in the last few thousand years, if not a 100,000 years. www.theclimatebrink.com/p/the-atmosp...
theclimatebrink.com
The Atmosphere Just Set a Water Vapor Record
More water vapor means more rocket fuel for extreme rain — so this record is not good news
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Bob Kopp @bobkopp.net · 14/09/2026
Note the first half of this quote — EPA’s ability to be malfeasant is a symptom of a corrupt judiciary eager to overturn precedent; climate advocates need to push for institutional reform, not let themselves focus entirely on the details of new executive actions in a future administration
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Streetsblog NYC @nyc.streetsblog.org · 14/09/2026
In kicking its redesign of "Canal Street East" to 2027, Mamdani's DOT chose political ease over safety. Plus the news. buff.ly/SeZCZqj
nyc.streetsblog.org
Monday's Headlines: A Predictable Tragedy Edition - Streetsblog New York City
In kicking its redesign of "Canal Street East" to 2027, Mamdani's DOT chose political ease over safety. Plus the news.
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LegraLeGra @atthenius.bsky.social · 14/09/2026
I always tell my students to put things in context. Ask reporters to frame their discussion in the perspective of the Baby Boomer (born 1950s) generation in their 20’s versus someone in their 20’s today. Here is an example from IPCC wrt global temperature Make it a part of their local story
From IPCC the warming chart for different generations
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Kate Marvel @drkatemarvel.bsky.social · 14/09/2026
Literally setting $120 billion on fire
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Simon Lee @simonleewx.com · 11/09/2026
Climate deniers on LinkedIn writing perfect climate science exam questions
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Stand Up for Science! @standupforscience.net · 11/09/2026
Higher Ed is under attack. Send America's Compact for Higher Education to your school's president demanding they endorse now: tr.ee/3OB6R2 United we stand. Divided we fall.
tr.ee
Demand your school's leadership publicly endorse America's Compact for Higher Education — STAND UP FOR SCIENCE
Email your school's president urgently asking them to publicly endorse America's Compact for Higher Education
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Jehiah @jehiah.cz · 10/09/2026
There are soooooooo many cars driving around in NYC. It's really freaking unbelievable. At the bare minimum charge for parking and rigorously enforce curbside regulations, but NYC continues to fail at both.
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JarekFA @jarekfa.bsky.social · 10/09/2026
Box truck driver killed someone today. We can’t build chicanes for cars. But we need to slow down bikes - in bike lanes - more? God im so sick of being an “out” group. These car loving reactionaries just love to shit on vulnerable street users!
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Casey Ivanovich @ccivanovich.bsky.social · 10/09/2026
Feel like heatwaves started early this year? Or like they're dragging on later than ever? Our new @aguadvances.bsky.social paper shows that extreme heat is no longer limited to summer and is now creeping into the shoulder seasons -- but unevenly so. (1/6) doi.org/10.1029/2026...
doi.org
Extreme Dry and Humid Heat Seasons Are Changing Asymmetrically
Extreme dry and humid heat events show distinct seasonality often not aligned with meteorological summer, even in the tropics Extreme heat seasons have expanded since the 1980s over about half of...
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Transportation Alternatives @transalt.org · 10/09/2026
NEW: As Kids Head Back to School, Transportation Alternatives Unveils “New Boulevards of Death” List of the 50 Most Dangerous Streets in New York City, Quarter-Mile from Over 2,300 Schools
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mr. TIM @timkellogg.me · 09/09/2026
another researcher accuses OpenAI of training on conversations and then claiming a breakthrough
Valerio Capraro @ValerioCapraro
X.com
BREAKING: OpenAl might have stolen another major proot.
In a detailed Mastodon post, which I report in full in the comments, Andreas Thom presents several pieces of evidence suggesting that OpenAl may have trained Astra on conversations in which he and Gábor Kun were working on Gromov's soficity conjecture, one of the ten problems OpenAl later announced Astra had solved.
I know Andreas. We met several times early in our careers. He is an exceptional mathematician, a leading expert on sofic and hyperlinear groups, and one of the most respected scholars in the field. He has spent two decades working on this problem.
If his account is correct, this is not a minor dispute over attribution. It would mean that unpublished human work was absorbed into a model and then presented to the world as a breakthrough by the model itself.And if the allegations raised by Levent Alpöge, Tristan Buckmaster, and now Andreas Thom are all substantiated, we are no longer looking at isolated incidents.
We may be looking at one of the greatest intellectual scandals in the history of science.
Al is not discovering new mathematics.
Al is stealing human discovery.
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David Ho @davidho.bsky.social · 09/09/2026
I’ve spoken to many reporters who are frustrated that even though they sometimes mention that the extreme events they’re reporting on are due to climate change and make the link to fossil fuels, people get upset when they don’t. The solution is to mention it every time, even if it seems repetitive.
Emphasize the impact of climate change
Ho said there is a frustration that climate scientists feel when they see reporting that doesn't mention climate change and doesn't mention how climate change is
caused by the burning of fossil fuels.
"Even though it's super boring, it's worth saying it in every article just because some people don't read every article," said Ho. "It's not a bad thing to mention that every time."
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Abigail Swann, PhD @ecoclimatelab.bsky.social · 09/09/2026
We have a new paper on the response of land carbon to zero, declining, and negative emissions of CO2 across Earth System Models! w/ @ckoven.bsky.social @cristiproist.bsky.social @rosieafisher.bsky.social @benmsanderson.bsky.social & more (1/6) esd.copernicus.org/articles/17/...
esd.copernicus.org
Land carbon response to positive, zero, and negative CO2 emissions across Earth system models
Abstract. Land carbon sinks are responsible for removing about a quarter of anthropogenic CO2 emissions, and make up approximately half of total global carbon sinks. Uncertainty in the response of lan...
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LegraLeGra @atthenius.bsky.social · 09/09/2026
The conversation wrt OpenAI and Navier-Stokes solutions on this is ongoing over on mastodon by the nyu courant prof . mastodon.social/@tristanbuckmaster/…
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Trevor A. Branch @trevorabranch.bsky.social · 08/09/2026
Millennium math problem solved by OpenAI may have "regurgitated" competitors unpublished work... also they spent more than $22 million in computing power in one week to scoop them. techcrunch.com/2026/09/08/o...
techcrunch.com
OpenAI fought dirty on career-making math problem, says NYU mathematician | TechCrunch
There is a $1 million bounty for the first person providing a solution to the Navier-Stokes existence and smoothness problem.
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Mel Andrews @bayesianboy.bsky.social · 09/09/2026
Possibly a significant addendum to the LLM advancements on Navier-Stokes. The problem is not restricted to the model’s potential reproduction of training data, either. A team at OpenAI was prompting their models with the mathematicians’ unpublished work without their knowledge.
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Streetsblog NYC @nyc.streetsblog.org · 06/09/2026
Two community boards want the job to go to the agency already in charge of the streets.
buff.ly
Push Grows To Move Parking Enforcement From NYPD To DOT - Streetsblog New York City
Two community boards want the job to go to the agency already in charge of the streets.
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Bike Talk @biketalk.bsky.social · 05/09/2026
Featuring @streetfilms.bsky.social!
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