Zack Labe
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Zack Labe
@zacklabe.com
Climate Scientist at @climatecentral.org | PhD | Passionate about improving science communication through data-driven stories | Harrisburg, PA | https://zacklabe.com/

Views, thoughts, and opinions expressed here are only my own.
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🧵 Looking for (polar) climate data visualizations? Start here! 📈📉🧪⚒️🌊

+ Polar climate change: zacklabe.com/arctic-sea-i...
+ Global climate change indicators: zacklabe.com/climate-chan...
+ #Arctic sea ice extent: zacklabe.com/arctic-sea-i...
+ #Antarctic sea ice: zacklabe.com/antarctic-se...
Nearly the entire Canadian Arctic Archipelago recorded temperatures warmer than 5°C above the 1981-2010 baseline in October 2025. And as I shared yesterday, sea ice in the Baffin Bay is currently a record low for the date... Hudson Bay too (I'll share that next).

Data from doi.org/10.24381/cds...
November 25, 2025 at 12:45 PM
Monday ice update - #Arctic sea ice extent is currently the *2nd* lowest on record (JAXA data)

• about 770,000 km² below the 2010s mean
• about 1,390,000 km² below the 2000s mean
• about 2,010,000 km² below the 1990s mean
• about 2,530,000 km² below the 1980s mean

More zacklabe.com/arctic-sea-i...
November 25, 2025 at 12:00 AM
🥹
November 24, 2025 at 8:22 PM
There actually is a local minimum in October around that region compared to the warmth nearby. However, this cold blob is more visible in long-term trend maps that smooth out the interannual variability like that is present in a noisy one-month view (e.g., just looking at October 2025 alone).
November 24, 2025 at 8:22 PM
There actually has been some really interesting work relating the state of the wintertime stratosphere to preconditioning springtime sea ice (e.g., doi.org/10.1175/JCLI... and doi.org/10.1175/JCLI...). I can try to find a more accessible summary of this research too. More to understand for sure!
November 24, 2025 at 8:20 PM
Thank you for sharing them - much appreciated!! Feel free to send them to my website too for questions/more graphics (zacklabe.com).
November 24, 2025 at 8:16 PM
This year's #Arctic sea ice freeze-up is clearly the latest on record for the Baffin Bay region (located between Greenland and the Canadian Arctic Archipelago). The extent of ice cover is a record low for the date there.

Data from @nsidc.bsky.social at nsidc.org/data/seaice_...
November 24, 2025 at 3:29 PM
Looking back at the average temperature departures over the last 3 months - find your location...

🟥 warmer than average
🟦 colder than average

Dataset described in doi.org/10.1175/BAMS...
November 24, 2025 at 12:50 PM
The 12-month running mean global temperature anomaly continues to fall from its peak (temporary), which is mostly in response to cooler conditions over the equatorial Pacific Ocean during the last year (weak La Niña state).

➡️ Graphic available by zacklabe.com/climate-chan... 🌊⚒️🧪
November 24, 2025 at 1:44 AM
Many areas around coastal regions of the #Arctic Ocean are getting wetter in November. The largest trends are found in the Barents-Kara Seas region, which correlates with warmer SSTs and less sea ice.

+ Data (GPCP): psl.noaa.gov/data/gridded...
+ More info: doi.org/10.25923/xf7...
November 23, 2025 at 2:07 PM
Not looking great for Santa's workshop 😳
November 23, 2025 at 2:28 AM
Watch 100 years of August-October temperature departures over land areas (where we live) up through 2025...

Data provided by NOAAGlobalTemp v6.0.0: www.ncei.noaa.gov/products/lan...
November 22, 2025 at 2:52 PM
Was there any coverage of the recent record warmth in both the Arctic and Antarctic? Multiple global datasets now confirm these records, and I think it's really quite striking.

Here's some very quick plots showing NOAAGlobalTempv6 data from October too. And see my earlier posts.
November 22, 2025 at 2:20 AM
This is really striking (to me). Temperatures over global land areas so far this year are still the 2nd warmest on record (after last year)... 🫥

Data from www.ncei.noaa.gov/products/lan...
November 21, 2025 at 6:47 PM
Friday ice update - #Arctic sea ice extent is currently the *2nd* lowest on record (JAXA data)

• about 720,000 km² below the 2010s mean
• about 1,390,000 km² below the 2000s mean
• about 2,010,000 km² below the 1990s mean
• about 2,520,000 km² below the 1980s mean

More zacklabe.com/arctic-sea-i...
November 21, 2025 at 1:28 PM
Thank you for sharing this!
November 21, 2025 at 12:31 PM
Take a look at this... Remarkable "warmth" last month across both polar regions when visualizing temperature departures by latitude. The x-axis is quite stretched out here compared to my usual monthly update of this graphic.

GISTEMPv4 using their 1951-1980 baseline (data.giss.nasa.gov/gistemp/).
November 20, 2025 at 9:16 PM
Great to know! I keep trying to figure out why there is no pause on the end… I include one when making it, prior to uploading the GIF on @bsky.app 😅
November 20, 2025 at 6:58 PM
Here's a closer look around Svalbard from last month in the #Arctic, where nearly all areas recorded temperatures more than 5°C warmer than the 1981-2010 average.

Data from doi.org/10.24381/cds...
November 20, 2025 at 12:26 PM
Wednesday ice update: #Arctic sea-ice extent is currently the *2nd* lowest on record for the current date (JAXA VISHOP data)...

More graphics of polar change: zacklabe.com/arctic-sea-i...
November 20, 2025 at 1:30 AM
Reposted by Zack Labe
“They won’t insure you,” Ms. Rojas said. “No one will buy from you. You’re kind of stuck where you are.” Our political leaders might not believe in climate change, but insurance companies know the score. And it's being felt disastrously, all over the country. www.nytimes.com/interactive/...
Rising Home Insurance Premiums Are Eating Into Home Values in Disaster-Prone Areas (Gift Article)
Changes in the insurance market have started to affect home prices in the most disaster-prone areas, new research finds, pushing some homeowners’ finances to the breaking point.
www.nytimes.com
November 19, 2025 at 4:24 PM
I wish there was better news than this headline ⚒️🧪

"Global carbon emissions from fossil fuels are projected to rise by 1.1% in 2025 - reaching a record high" (globalcarbonbudget.org/fossil-fuel-...)

+ Global Carbon Budget 2025 is out globalcarbonbudget.org/gcb-2025/
+ Paper doi.org/10.5194/essd...
November 19, 2025 at 1:07 PM
A view of this year's extreme sea surface temperatures and recent warming across the North Pacific... 🌊

This graph shows the average for a band across the midlatitudes for every average January-October period from 1854-2025 using ERSSTv5 data.
November 19, 2025 at 1:28 AM
Reposted by Zack Labe
📈🚨NEW: Extreme heat events are increasingly threatening to become mass mortality events. In @natclimate.nature.com today, we project tens of thousands of deaths in a single week across Europe if extreme heat domes coincide with rising global temperatures.

www.nature.com/articles/s41...
Increasing risk of mass human heat mortality if historical weather patterns recur - Nature Climate Change
The authors couple calculations of historical heatwave intensity at present and future global temperatures with exposure–response functions to quantify mortality from extreme heat events in Europe. Th...
www.nature.com
November 18, 2025 at 1:06 PM