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Ambarish Karmalkar

@ambarish

Climate Scientist | Studying how global warming affects us locally | Assistant Professor @ University of Rhode Island | https://web.uri.edu/geo/ambarish-karmalkar/

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Latest posts by Ambarish Karmalkar @ambarish

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Non-zero probability that you may regret saying this

08.03.2026 17:09 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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This iceberg was once the biggest in the world. Now it has just weeks left - BBC News A23a was once twice the size of Greater London but now its 40-year journey is coming to an end.

Lovely story on the BBC about iceberg a23a, which has given us decades of fun but is now nearing its end…

Really enjoyed talking with Mark Poynting about this one-time behemoth.

www.bbc.co.uk/news/resourc...

07.03.2026 07:57 πŸ‘ 63 πŸ” 31 πŸ’¬ 1 πŸ“Œ 3

Academic writing: why use utilize when you can use use

07.03.2026 14:33 πŸ‘ 5 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
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Thirty years of glacier grounding line retreat in Antarctica | PNAS The Grounding Line (GL)—the transition from ice grounded on the continent and ice afloat in the ocean—is a sensitive indicator of glacier stability...

Between 1992-2025, large areas of the grounding line of #Antarctic glaciers have retreated. The largest changes have occurred in W. Antarctica, where grounding lines have retreated 10-40+ km, driven by incursions of warm water masses along deep bathymetric troughs

www.pnas.org/doi/full/10....

❄️πŸ§ͺ🌊

06.03.2026 08:37 πŸ‘ 18 πŸ” 13 πŸ’¬ 0 πŸ“Œ 1
Time series plot depicting predicted Nino 3.4 region ocean temperature anomalies from the latest (Mar 2026) ECMWF ensemble. It depicts an extremely rapid rise in such temperatures, from modest negative anomalies to strong positive anomalies, by mid-summer 2026--indicative of a transition from weak-moderate La Nina conditions to moderate-strong El Nino conditions over just a few months.

Time series plot depicting predicted Nino 3.4 region ocean temperature anomalies from the latest (Mar 2026) ECMWF ensemble. It depicts an extremely rapid rise in such temperatures, from modest negative anomalies to strong positive anomalies, by mid-summer 2026--indicative of a transition from weak-moderate La Nina conditions to moderate-strong El Nino conditions over just a few months.

Whew.

All signs are increasingly pointing to a significant, if not strong to very strong, El NiΓ±o event. I'll have more to say in coming weeks & months, but for now I'll just say that this is increasingly likely to become a major regional-to-global climate driver in 2026-2027.

05.03.2026 23:05 πŸ‘ 417 πŸ” 192 πŸ’¬ 20 πŸ“Œ 31

That's like a little over five Rhode Islands

03.03.2026 01:35 πŸ‘ 9 πŸ” 4 πŸ’¬ 1 πŸ“Œ 0

Sigh.

This is the directorate that funds all of the earth, ocean & atmosphere research at NSF.

01.03.2026 20:55 πŸ‘ 69 πŸ” 30 πŸ’¬ 2 πŸ“Œ 1

Antarctic land will rebound over thousands of years, so land area should change over time.

25.02.2026 17:19 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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A net loss of livable land in the near-term cause a big portion of Antarctic land is already below sea level (πŸ‘‡) + Greenland ice sheet goes b4 Ant so more SLR + ocean expansion due to warm conditions + Earth's axial tilt means brutal polar winters (=not livable)

www.bas.ac.uk/news/new-map...

25.02.2026 17:17 πŸ‘ 1 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

The fact that food waste is not a polarizing issue might be the reason for slow progress. Baffles my how much food people waste and how little they think about it ...

25.02.2026 15:20 πŸ‘ 0 πŸ” 1 πŸ’¬ 1 πŸ“Œ 0
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Tropopause height and wind speed from yesterday's Nor'easter.

Made with the free and open-source ParaView package. πŸ§ͺ#SciArt #SciComm #Noreaster

24.02.2026 15:35 πŸ‘ 13 πŸ” 2 πŸ’¬ 0 πŸ“Œ 0
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Wow! 37.9” (96 cm) of snow has fallen in Providence, Rhode Island, pulverizing the previous all-time single-storm snowfall record by over 9”.

24.02.2026 13:33 πŸ‘ 51 πŸ” 22 πŸ’¬ 2 πŸ“Œ 3
Photo of the sun shining on three plus feet of snow piled up on the deck after the blizzard

Photo of the sun shining on three plus feet of snow piled up on the deck after the blizzard

Blizzard of 2026, Rhode Island

24.02.2026 14:28 πŸ‘ 4 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0

...RECORD SNOWSTORM FOR PROVIDENCE RI...

AS OF 1 PM, THE SNOWFALL TOTAL AT RHODE ISLAND T.F. GREENE INTERNATIONAL AIRPORT WAS 32.8 INCHES. THIS BROKE THE RECORD FOR THE GREATEST SINGLE SNOWSTORM ON RECORD, WHICH WAS 28.6 INCHES SET DURING THE BLIZZARD OF `78, ON FEBRUARY 6-7, 1978.

23.02.2026 19:22 πŸ‘ 9 πŸ” 3 πŸ’¬ 0 πŸ“Œ 0

The fundamental premise behind AI-enabled cheating is that coursework is merely busy work, because your'e just doing it for professors.

We would never say that showing up for football practice is merely busy work because you're just doing it for your coaches.

23.02.2026 15:51 πŸ‘ 159 πŸ” 56 πŸ’¬ 5 πŸ“Œ 4
What if I want to do an assignment myself?

What if I want to do an assignment myself?

lol

23.02.2026 15:39 πŸ‘ 985 πŸ” 54 πŸ’¬ 8 πŸ“Œ 3

The work is original? ....and that doesn't answer the question

23.02.2026 15:56 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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Increasing synchronicity of global extreme fire weather Increasing synchronicity of global extreme fire weather constrains fire suppression coordination and exacerbates air pollution.

Our new study in Science Advances: Extreme fire risk days are increasingly synchronizing globally. This trend strains firefighting cooperation and worsens regional air quality.

With @climate-guy.bsky.social @mattwjones.bsky.social @mojisadegh.bsky.social and Alison Cullen

doi.org/10.1126/scia...

19.02.2026 00:28 πŸ‘ 54 πŸ” 29 πŸ’¬ 1 πŸ“Œ 1
A screenshot of the CRU-TS national time series dashboard

A screenshot of the CRU-TS national time series dashboard

New dashboard to visualise CRU-TS country averages (i.e. CRU-CY) for temperature, precipitation, humidity and drought area (using our scPDSI indicator).

(It takes a little while to first load, but is quite responsive after that)

climate.uea.co/CRU-Timeseri...

16.02.2026 15:09 πŸ‘ 62 πŸ” 29 πŸ’¬ 1 πŸ“Œ 7
SWAIS2C - Record-breaking sediment core provides unprecedented evidence of West Antarctic Ice Sheet retreat

"Initial indications are that the layers of sediment in the core span the past 23 million years" swais2c.aq/media/record...

17.02.2026 21:03 πŸ‘ 3 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0

This seems like a great moment to talk about the importance of science communication!

Science communication matters because it connects scientific research with people, giving folks information they need to make informed decisions about everything from health to hazards.

16.02.2026 16:05 πŸ‘ 131 πŸ” 35 πŸ’¬ 2 πŸ“Œ 5

The story of the Italian cricket team is quite interesting...

16.02.2026 14:01 πŸ‘ 1 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
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Fresh fears for South West's rail link in Dawlish after storms Taxpayer money has flowed into fixing the rail line connecting Cornwall with the rest of the UK - but the elements have other ideas.

The Dawlish - Teignmouth railway line feels like the absolute front line of climate adaptation in Britain (a test we are not passing so far).

And yet somehow, somehow, this article manages to go in-depth on the problems with the line without mentioning the climate once. The sea is literally higher!

15.02.2026 20:27 πŸ‘ 233 πŸ” 80 πŸ’¬ 9 πŸ“Œ 5

Yes, it's been cold in the Northeast US, but really nothing out of the ordinary. Dec-Jan temperatures:πŸ‘‡

15.02.2026 16:12 πŸ‘ 3 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
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Careers at the University of Massachusetts Lowell | UMass Lowell

Our department - Environmental, Earth, and Atmospheric Sciences at UML - is hiring a Visiting Lecturer! Please circulate.

This is intended to be a pathway to a permanent Teaching Faculty position (with demonstrated excellence in teaching and service).

careers.pageuppeople.com/822/lowell/e...

13.02.2026 20:26 πŸ‘ 5 πŸ” 2 πŸ’¬ 0 πŸ“Œ 0
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Multi-year La NiΓ±a–El NiΓ±o transition influenced Earth’s extreme energy uptake in 2022–2023 - Nature Geoscience The extreme Earth heat uptake in 2022–2023 was mainly driven by the transition from multi-year La NiΓ±a to El NiΓ±o and a positive energy imbalance linked to human-induced warming, according to multi-mo...

"finding underscores the role of internal climate variability in shaping Earth’s energy budget and its potential amplification under a warming climate."
www.nature.com/articles/s41...

13.02.2026 12:30 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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Instagram boss: 16 hours of daily use is not addiction Instagram's Adam Mosseri faced questioning about the impact of his platform on minors.

Fossil industry CEO says their GHG emissions don't cause climate change

www.bbc.com/news/article...

12.02.2026 23:12 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

I believe forest management considers long-term projections ....forest migration and shifts can look very different depending on the scenario.

12.02.2026 19:53 πŸ‘ 1 πŸ” 0 πŸ’¬ 2 πŸ“Œ 0

Working on a state assessment right now where I am providing projections for all scenarios, including 8.5. The tricky part is providing guidance. Inevitably, there are qs from those who've heard the 8.5-is-bollox argument. The question you pose is a good one to address that, thanks!

12.02.2026 19:45 πŸ‘ 2 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

Sure but despite my reservations about providing localized info, temp projections for 2100 are going to be significantly different for 7.0 and 8.5, which then raises qs about their plausibility.

I wouldn't worry about this too much for local precip projections.

12.02.2026 15:30 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0