Mike Sparrow

@wcrpclimate.bsky.social's APARC releases a landmark report on global atmospheric impacts of the 2022 Hunga volcanic eruption

159 scientists. 21 countries. 3 years. One report.

More information here: https://bit.ly/493hOmz

#WCRP #APARC #ScienceforAction #HungaEruption

UN environment report 'hijacked' over fossil fuels - top scientist The US and other governments derailed an agreement on a global environment study, its co-chair says.

UN environment report 'hijacked' by US and others over fossil fuels, top scientist says: www.bbc.co.uk/news/article...

Don’t miss the final CLIVAR webinars of 2025 as we wrap up the year!

Dec 10: "Ocean-atmosphere coupled model development(...)" with Jing-Jia Luo (07:00 UTC)

Dec 11: "When internal variability meets climate change(...)" with Thibault Guinaldo (14:00 UTC)

Check the full details 👇

Collapse of critical Atlantic current is no longer low-likelihood, study finds Scientists say ‘shocking’ discovery shows rapid cuts in carbon emissions are needed to avoid catastrophic fallout

Collapse of critical Atlantic current is no longer low-likelihood, study finds:
www.theguardian.com/environment/... #climate #climatecrisis #ocean #SDG13 #SDG14

ECMWF Science blog. The AI Weather Quest: uniting international expertise to advance sub-seasonal forecasting. Authors: Joshua Talib, Olga Loegel, Frederic Vitart, Joern Hoffmann, Matthew Chantry.

New science blog:
As the competition phase of the #AIWeatherQuest starts, the organisers introduce the competition framework and establish a baseline by assessing the skill of current dynamical sub-seasonal forecast models.
➡️ www.ecmwf.int/en/about/med...

@wmo-global.bsky.social

Guest post: Why the recent slowdown in Arctic sea ice loss is only temporary - Carbon Brief Observations reveal that Arctic sea ice extent at the end of summer has halved, since satellite records began in the late 1970s.

NEW – Guest post: Why the recent slowdown in Arctic sea ice loss is only temporary | @markengland.bsky.social

Read here: buff.ly/eASA2sG

Antarctic Ocean secrets hidden in layers of seafloor mud How long tubes of mud - drilled out of the Antarctic seafloor - could reveal how the frozen continent is changing.

How long tubes of mud could reveal how Antarctica is changing www.bbc.com/news/article... #Antarctica #Polar #Climate

Scientists map Antarctic seafloor canyons to help predict climate breakdown Study suggests the underwater valleys have a major impact on ice loss and ocean circulation

Scientists map Antarctic seafloor canyons to help predict climate breakdown : www.theguardian.com/environment/...

🌊❄️🧪 🇦🇶 Please share:

We have learned that the National Science Foundation is moving ahead with plans to decommission the U.S. Research Vessel/Ice Breaker Nathaniel B. Palmer this October.

If you care about Antarctic research, please read on (1/n)

Extreme heat could lead to 30,000 deaths a year in England and Wales by 2070s, say scientists Worst-case scenario of 4.3C of warming could result in fiftyfold rise in heat-related deaths, researchers say

Extreme heat could lead to 30,000 deaths a year in England and Wales by 2070s : www.theguardian.com/environment/...

Interested in joining the APECS international Executive Committee for 2026? There are only a few days left to apply! apecs.is/who-we-are/l...

This is not the actual cover of Nature, just shown here for illustrative purposes. We did submit this figure for consideration for their cover. Print run in two weeks, we'll know by then if it gets used.

Out today in Nature, our paper on the drivers of the record 2023 summer heating of the North Atlantic. Temperatures warmed to record levels in just a few months. The impacts on climate & ecosystems were severe. A thread on how this work came about and what we found.👇👇🧵 www.nature.com/articles/s41...

So sorry …! 🤯

Trump moves to hobble major US climate change study The cuts are a potentially fatal blow to the National Climate Assessment that Congress mandated to ensure the government understands the threats posed by rising temperatures.

Terrible news - The Trump administration is canceling funding for the U.S. Global Change Research Program : www.politico.com/news/2025/04...

"To address climate challenges, we need more women in science and policy-making to drive solutions that protect our wetlands." — Prof. Celeste Saulo

➡️ www.ramsar.org/person/prof-...

Last month was the 4th lowest #Antarctic sea ice extent on record for the month of March

This was 1,070,000 km² below the 1981-2010 March average. Data from NSIDC at nsidc.org/data/seaice_... 🌊

Line graph time series of 2025's daily Arctic sea ice extent compared to decadal averages from the 1980s to the 2010s. The decadal averages are shown with different colored lines with purple for the 1980s, blue for the 1990s, green for the 2000s, and white for the 2010s. Thin white lines are also shown for each year from 2000 to 2024. 2025 is shown with a thick gold line. There is a long-term decreasing trend in ice extent for every day of the year shown on this graph between February and May by looking at the decadal average line positions.

Monday ice update - #Arctic sea ice extent is currently the lowest on record (JAXA data)

• about 570,000 km² below the 2010s mean
• about 970,000 km² below the 2000s mean
• about 1,540,000 km² below the 1990s mean
• about 1,920,000 km² below the 1980s mean

Plots: zacklabe.com/arctic-sea-i... 🧪⚒️🌊

🚨 It's official - 2025 likely observed the lowest annual maximum #Arctic sea ice extent on record!

Climate change is reshaping the Arctic, all throughout the year.

For more information from @nsidc.bsky.social: nsidc.org/sea-ice-toda...

Open Call for Membership: WCRP Global Precipitation Experiment (GPEX) 🌧️

The WCRP GPEX Lighthouse Activity is expanding its Working Groups and invites nominations (including self-nominations) from scientists worldwide.

📅 Deadline: 31 March 2025
🔗 More information below

#ClimateScience #GPEX #WCRP

Key climate research office may close amid federal cost-cutting A federal cost-cutting initiative may shut down the National Oceanic and Atmospheric Administration (NOAA) office that manages Hawaii’s Mauna Loa Observatory, a critical site for tracking atmospheric ...

Cannot believe that the Mauna Loa Observatory is under threat of closure 😱
It is home to the world’s longest-running measurements of atmospheric carbon dioxide, providing the foundation for understanding the role of greenhouse gases in climate change.

www.ehn.org/key-climate-...

Line graph time series showing the latest mean sea level as of 27 January 2025 using data from 1993. There is a long-term increasing trend and a quadratic fit line is shown on the graph with an acceleration of 0.11 mm/yr^2. The current rate of increase is +4.1 mm/yr in the 2013-2024 period.

Another global sea level update with satellite altimetry data now processed by CNES/AVISO through late January 2025. It's accelerating. 🌊

+ Note that this graph was produced by www.aviso.altimetry.fr/en/data/prod...

🔴The #StateOfClimate report, released today, reveals key climate change indicators again reached record levels in 2024.

Check out the full report: wmo.int/publication-...

We've just published a study @commsearth.bsky.social about the severe 2020 coral bleaching event in the tropical Atlantic caused by massive marine heatwaves 🌊🌡️🧵

Link: www.nature.com/articles/s43...

Trump moves to close government lab that tracks planet-warming pollution The lab is connected to the Mauna Loa Observatory, where scientists gather data to produce the Keeling Curve, a chart on the daily status of atmospheric carbon dioxide concentrations.

New: A NOAA lab in Hawaii that is connected to the longest-running observation of global greenhouse gas concentrations is slated for closure in August, according to a list of lease terminations Democratic members of Congress shared with @washingtonpost.com.

Earth’s strongest ocean current could slow down by 20% by 2050 in a high emissions future Melting Antarctic ice is releasing cold, fresh water into the ocean, which is projected to cause the slowdown

Earth’s strongest ocean current could slow down by 20% by 2050 in a high emissions future: www.theguardian.com/environment/... #Antarctica #Polar #climate #SDG13

Welcome to the Bluesky account for Stand Up for Science 2025!

Keep an eye on this space for updates, event information, and ways to get involved. We can't wait to see everyone #standupforscience2025 on March 7th, both in DC and locations nationwide!

#scienceforall #sciencenotsilence

Line graph time series of 2025's daily Arctic sea ice extent compared to decadal averages from the 1980s to the 2010s. The decadal averages are shown with different colored lines with purple for the 1980s, blue for the 1990s, green for the 2000s, and white for the 2010s. Thin white lines are also shown for each year from 2000 to 2024. 2025 is shown with a thick gold line. There is a long-term decreasing trend in ice extent for every day of the year shown on this graph between January and April by looking at the decadal average line positions.

In the next few days, I will be sharing some of our work that I am most proud of from my time at NOAA/GFDL. But I would also like a little normalcy today on my feed, so here's my go-to sea ice data viz update.

#Arctic sea ice extent still remains the *lowest* on record for the date (JAXA). Not good

📣 Digital Earths lighthouse activity is organizing a global pan-hackathon for km-scale models! Dozens of researchers from across the world will participate in this hackathon in real-time.

Here is a curtain-raiser video about the event: loom.ly/xYErXdU

#KmScalemodels #EarthSystemModels #Hackathon

So sorry for you and so sorry for the short-sightedness of all this …