iiinova — where your digital self keeps evolving

Marc Alessi @marc-alessi.bsky.social · 3h

sub 40F tonight!!! 😍😍😍😃😃😃

Marc Alessi @marc-alessi.bsky.social · 9h

My new blog on the Super El Niño will hopefully answer some questions you might have on: ONI vs RONI, how El Niño impacts global weather patterns, and the state of emergency announcement in California

blog.ucs.org

Strongest El Niño on Record Triggers California State of Emergency and Is Already Affecting Global Weather Patterns

And it’s only September— El Niño doesn’t typically peak until November-January.

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Marc Alessi @marc-alessi.bsky.social · 29/09/2026

To my fellow @cornelluniversity.bsky.social alums out there, please sign this petition and withhold all donations until the demands are met: c.org/gwTNKbmcCf

c.org

Sign the Petition

CORNELL ALUMNI SUPPORTING JANE DOE

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Marc Alessi @marc-alessi.bsky.social · 28/09/2026

New Commentary out in Nature Climate Action: we now live in a fundamentally different climate system due to the burning of fossil fuels. Because of this, any extreme weather event now occurs in a changed climate and is influenced by fossil fuel-driven climate change to some degree.

nature.com

The next phase of climate attribution - npj Climate Action

Attribution science has transformed our understanding of how anthropogenic emissions shape extreme weather events, yet the field remains constrained by repeatedly demonstrating anthropogenic influence...

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Marc Alessi @marc-alessi.bsky.social · 25/09/2026

There’s some chatter about this weekend’s nor’easter going “subtropical.” If you’re wondering what that means, I have a blog for you!

blog.ucs.org

Hurricanes, Nor’easters, Subtropical Storms! What’s the Difference?

Different types of storms explained.

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Marc Alessi @marc-alessi.bsky.social · 24/09/2026

The world’s oceans have overheated due to fossil fuel-driven climate change, and we’re seeing the impacts of it right now. In the US, there are 3 examples of extreme precip: a tropical system bringing torrential rain to Hawaii; heavy monsoon rains in NM; and a strong, early-season Nor’easter.

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Marc Alessi @marc-alessi.bsky.social · 10/09/2026

No doubt this marine heatwave is contributing to the absolutely insane humidity values being observed in SoCal

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Marc Alessi @marc-alessi.bsky.social · 10/09/2026

According to new data, August 2026 was the hottest Aug on record globally, tying July 2023 as the hottest month in recorded history. The heat is in part due to record ocean temperatures across the globe from the burning of fossil fuels and the developing Super El Niño. @copernicusecmwf.bsky.social

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Marc Alessi @marc-alessi.bsky.social · 02/09/2026

The latest HRRR is predicting quite the squall line over Western and Central New York this evening with an enhanced risk of severe weather from the SPC (and quite a significant high wind risk). Hopefully NYS Fair is monitoring...

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Marc Alessi @marc-alessi.bsky.social · 02/09/2026

Some morning severe thunderstorms on their way to cuse

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Marc Alessi @marc-alessi.bsky.social · 02/09/2026

Why is this so important? The Arctic permafrost stores almost 1,700 billion tons of frozen and thawing carbon-- and it's unclear how much of that carbon will be released as fossil fuel-driven climate change worsens.

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Marc Alessi @marc-alessi.bsky.social · 31/08/2026

The world has never been hotter for this time of year in recorded history. According to the latest data from the Climate Change Institute at the University of Maine, the average global surface air temperature is over 1.0C above the historical average:

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Marc Alessi @marc-alessi.bsky.social · 26/08/2026

It’s been so nice to be working from the Max Planck Institute for Meteorology in Hamburg this month. Just gave a seminar on my research this morning!

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Marc Alessi @marc-alessi.bsky.social · 13/08/2026

It’s over 100F for the second time this year in London

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Marc Alessi @marc-alessi.bsky.social · 13/08/2026

Had a lovely time visiting the @metoffice.gov.uk and giving a seminar on my @ucs.org fellowship research (filling in data gaps in Global South countries using machine learning)!

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Marc Alessi @marc-alessi.bsky.social · 12/08/2026

My third solar eclipse from Exeter, UK! I think we reached about 97% coverage here

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Reposted by Marc Alessi

Union of Concerned Scientists @ucs.org · 11/08/2026

The Trump administration is cancelling federal support for #NOAA’s Arctic Report Card, an essential scientific report that shows how fossil fueled climate change is having an alarming effect on the vital signs of this unique region of the world.

eos.org

Government Pulls Funding for the Arctic Report Card - Eos

The Trump administration is pulling funding from NOAA’s Arctic Report Card, an annual, peer-reviewed report about the state of the region, which is warming more quickly than anywhere else on Earth.

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Marc Alessi @marc-alessi.bsky.social · 10/08/2026

The world’s oceans experienced their hottest July on record, thanks to a combination of the developing Super El Niño in the Pacific Ocean and fossil fuel-driven climate change. www.bbc.com/news/article...

bbc.com

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Marc Alessi @marc-alessi.bsky.social · 06/08/2026

No doubt we're on track for a record breaking El Niño event in the Pacific. While, yes, El Niño is part of a natural cycle in Earth's climate system, what's happening now is a combination of El Niño + ocean warming and marine heatwaves from fossil fuel-driven climate change.

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Marc Alessi @marc-alessi.bsky.social · 06/08/2026

Totally normal things happening in the Pacific Ocean 🙃

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Marc Alessi @marc-alessi.bsky.social · 05/08/2026

If you've ever wondered why not to use the jet color scheme in manuscript figures, I was just pointed to this excellent article with great examples of colorbars that do work: www.nature.com/articles/s41...

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Marc Alessi @marc-alessi.bsky.social · 04/08/2026

Ok, I'm starting a thread of climate and weather extremes that are eye-popping that I will continuously add to (reminder that Big Oil continues to take in record profits at the expense of our planet):

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Marc Alessi @marc-alessi.bsky.social · 04/08/2026

Check out this great blog by my colleague at UCS. The climate isn't just changing-- it's already changed. And Big Oil is announcing record profits while the world is on fire...

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Marc Alessi @marc-alessi.bsky.social · 03/08/2026

Also worth flagging that there's a near 50% chance (according to the NMME) we'll cross a +2.0F global temperature anomaly for multiple months later this year into 2027...

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Marc Alessi @marc-alessi.bsky.social · 26/07/2026

can you guess where the pop up storm is ⛈️ (this is quite an impressive temperature contrast for east side to west side of Syracuse!!)

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Reposted by Marc Alessi

ucsshana.bsky.social @ucsshana.bsky.social · 22/07/2026

The record-shattering, deadly #heat dome followed 3 years of hottest global temps in recorded history thanks to fossil fueled-climate. Heat is deadliest climate impact in the U.S., particularly in cities' due to urban heat island effect. Too often, killer heat flies under the radar. bit.ly/4wcKCmJ

bit.ly

Fossil Fuels Are Heating America’s 250th Birthday – World Weather Attribution

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Reposted by Marc Alessi

Union of Concerned Scientists @ucs.org · 21/07/2026

From record marine heatwaves to a developing super El Niño, UCS climate experts Erika Spanger & @marc-alessi.bsky.social take a closer look at what's happening in our oceans and what it could mean for the months ahead. Join us in an hour! youtube.com/live/o4-WMpEpilg

youtube.com

Danger Season Live: Marine Heatwaves & Super El Niño

YouTube video by Union of Concerned Scientists

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Marc Alessi @marc-alessi.bsky.social · 20/07/2026

There are a lot of climate-related extremes happening around the world right now (40% of the oceans are experiencing a marine heatwave, heat domes, wildfires, super El Niño...). Come listen to us discuss these events and how they're related to fossil fuel-driven climate change tomorrow!

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Marc Alessi @marc-alessi.bsky.social · 17/07/2026

Climate zones are shifting: The ecosystems that once supported these beautiful forests may no longer be able to as hotter temps and drier conditions push further north than they used to

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Marc Alessi @marc-alessi.bsky.social · 17/07/2026

Lots of things are happening in our climate today thanks to the emission of heat trapping gases. Check out my recent blog on the upcoming Super El Niño, marine heatwaves, and the heat dome blog.ucs.org/marc-alessi/...

blog.ucs.org

Unprecedented Earth: Record Super El Niño, Marine Heatwaves, and Heat Domes

There's a roughly 90% chance of this El Niño becoming the strongest in recorded history.

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Reposted by Marc Alessi

Union of Concerned Scientists @ucs.org · 17/07/2026

UCS’s @marc-alessi.bsky.social joins the discussion on Your Call’s Authoritarian Playbook Series, where they talk about how the Trump admin’s environmental policies are accelerating the climate crisis by gutting clean energy projects, boosting fossil fuels & attacking agencies & scientists.

kalw.org

The Authoritarian Playbook: Trump's assault on climate & green energy

As millions in the US experience record heat waves, the Trump administration is accelerating climate change by gutting clean energy projects and boosting fossil fuels.

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Marc Alessi @marc-alessi.bsky.social · 02/07/2026

I wonder what the updraft speed is

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Marc Alessi @marc-alessi.bsky.social · 02/07/2026

Just a reminder that Exxon hired its own climate scientists in the 1970s/80s who accurately predicted climate change... They then covered up their own scientists' work and pursued a campaign of disinformation starting in the 1996 so that they could continue profiting off the destruction of Earth.

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Marc Alessi @marc-alessi.bsky.social · 02/07/2026

Yes! Water cooling! This reminds me of Cornell’s lake water cooling system. It literally pumps cool water from Cayuga Lake to a heat exchange facility that then pumps cool water all the way up to campus. Incredible feat of engineering. Zero AC on campus

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Marc Alessi @marc-alessi.bsky.social · 01/07/2026

Heat index of 98F and it's only 10:30am 😭

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Marc Alessi @marc-alessi.bsky.social · 30/06/2026

Come work with me at UCS as a fellow! "The Science Fellow will conduct an interdisciplinary, two-year project examining the energy, emissions, and equity impacts of AI-driven data center expansion." Apply here: apply.workable.com/union-of-con...

apply.workable.com

Hitz Fellow, Fossil Fuel-Al Nexus - Union of Concerned Scientists

Hitz Fellow, Fossil Fuel-Al Nexus TERM: MAX 2-YearsClimate and EnergyUnion of Concerned ScientistsRemoteBargaining Unit Position: Yes  Our OrganizationThe Union of Concerned Scientists (UCS) is a...

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Marc Alessi @marc-alessi.bsky.social · 29/06/2026

The highlight of this heatwave is the humidity. Dew points around 75F in Upstate NY is crazy. And feels-like temperatures around 105F? No thank you...

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Reposted by Marc Alessi

The Weather & Climate Livestream @wclivestream.bsky.social · 16/06/2026

On June 3rd, Syl Foisy finished his NYC to DC walk by delivering your letters in support of weather & climate science to 7 representatives! Watch Syl, @andrewilwilliams.bsky.social, @vgwschutte.bsky.social, and @marc-alessi.bsky.social talk about this critical moment: www.youtube.com/watch?v=GMaE...

youtube.com

Press conference following the Weather & Climate Livestream walk to DC, June 3, 2026 on Capitol Hill

YouTube video by The Weather & Climate Livestream

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Marc Alessi @marc-alessi.bsky.social · 15/06/2026

Never have I seen a more beautiful summer forecast

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Reposted by Marc Alessi

Union of Concerned Scientists @ucs.org · 04/06/2026

1/ We have entered an age of climate-driven ocean heat, where the fact that we’ve overheated our water planet (70% of it covered by ocean) will loom large for centuries to come. (🧵⬇️)

blog.ucs.org

Overheating a Water Planet: Warmed Oceans Will Not Be Ignored

The Trump administration is canceling oceanic research, as our world's oceans overheat. What could go wrong?

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