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Check out the total extent of the ocean warmth from last month... Data from NOAA OISSTv2.1 🌊

Global map showing sea surface temperature anomalies in August 2026 relative to 1982 to 2010. Most areas are warmer than average. Red is shown for warmer sea surface temperatures, and blue is shown for colder sea surface temperatures. Data is from NOAA OISSTv2.1.

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Trends in September temperatures over land areas for the last 50 years... note some of the regional hotspots in the darker red shading Data from www.ncei.noaa.gov/products/lan...

Global map showing surface air temperature trends for each September from 1976 to 2025. Only land areas are shown. Red shading is shown for warmer temperature trends, and blue shading is shown for colder temperature trends. Data is from NOAA/NESDIS/NCEI NOAAGlobalTempv6.0.0. The temperature trend scale is from -0.5°C/decade to +0.5°C/decade. Most all areas are warming.

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Monday ice update - #Arctic sea ice extent is currently the 16th lowest on record (JAXA data) • about 320,000 km² above the 2010s mean • about 720,000 km² below the 2000s mean • about 1,890,000 km² below the 1990s mean • about 2,590,000 km² below the 1980s mean More: zacklabe.com/arctic-sea-i...

Line graph time series of 2026'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 2025. 2026 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 August and October by looking at the decadal average line positions.

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Comparing monthly average temperature anomalies in the Northern Hemisphere versus the Southern Hemisphere through August 2026 (record warm). The climate change trend in all months of the year can be visualized through the blue to red gradient. Data available via @copernicusecmwf.bsky.social ERA5.

Line graph time series of monthly mean surface temperature anomalies for the Northern Hemisphere region only. Every month is shown from 1940 to August 2026. There is a long-term warming trend in all months of the year.

Line graph time series of monthly mean surface temperature anomalies for the Southern Hemisphere region only. Every month is shown from 1940 to August 2026. There is a long-term warming trend in all months of the year.

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Global temperatures are trailing 2023, so it will not break a new record for this specific month.

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The last three months are the warmest on record globally, relative to every other June-July-August period since 1850. Data from NOAA/NCEI's NOAAGlobalTempv6.1.0.

Line graph time series of global land mean surface temperature anomalies for each June-August period from 1850 through 2026. There is a long-term increasing trend and large year-to-year variability. The mean surface temperature anomaly averaged for June-August 2026 was 1.21°C for global land areas. Anomalies are computed relative to a 1901-2000 climate baseline. Data from NOAA/NESDIS/NCEI NOAAGlobalTemp v6.1.0.

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The Weakened Atlantic Meridional Overturning Circulation Diminishes Recent Arctic Sea Ice Loss

Yes, here is one example: doi.org/10.1029/2023.... However, Arctic sea-ice loss itself can also affect the AMOC. So it can be challenging to disentangle these two-way interactions without using idealized climate model experiments.

doi.org

This study clarifies the AMOC's impact on Arctic sea ice by using the CCSM4 climate model simulations with weakened and stationary AMOCs The weakened AMOC could decelerate the Arctic sea ice area...

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Zack Labe @zacklabe.com · 26/09/2026

Last month showed unusually warm sea surface temperatures across much of the #Arctic Ocean, especially in the Kara Sea, Baffin Bay, & Labrador Sea. There's been an interesting contrast in ocean temperature departures across the East Siberian Sea, as well as some lingering ice Data: NOAA OISSTv2.1 🌊

Polar stereographic map showing sea surface temperature anomalies in August 2026 relative to 1982 to 2010. Most areas are warmer than average. Sea-ice cover is also shown if sea-ice concentration is at least 15% per each grid point. Red is shown for warmer sea surface temperatures, and blue is shown for colder sea surface temperatures. Data is from OISSTv2.1.

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"Over the last decade, 255 out of 378 days with coastal flooding in the Ocean City, NJ area were caused by heat-trapping pollution raising sea levels" Explore the new attribution data with coastal.climatecentral.org/coastal-risk...

coastal.climatecentral.org

Coastal Risk Finder: Sea Level Rise & Coastal Flood Risk Maps - Ocean City, NJ

Explore local flood projections, risk analyses, and solutions for Ocean City, NJ.

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Zack Labe @zacklabe.com · 26/09/2026

My next 'climate viz of the month' blog is posted, which summarizes this past summer across the Arctic after recently reaching the September annual minimum for sea-ice extent: zacklabe.com/climate-viz-... #SciComm #OpenScience #OpenData #DataViz

zacklabe.com

Climate Viz of the Month

August 2026 Hi all! The Northern Hemisphere summer has come and gone, and with relatively little fanfare in the Arctic this year. That doesn’t mean there were not areas of climate extremes or that …

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Zack Labe @zacklabe.com · 26/09/2026

Good morning! Monthly climate change indicator update time... 🫣 + Global temperature: 📈 + Carbon dioxide (CO₂): 📈 + Methane (CH₄): 📈 + Nitrous oxide (N₂O): 📈 Download at zacklabe.com/climate-chan...

This graphic shows four line graph time series and each are monthly from January 1984 through August 2026. The first graph is a 12-month running mean of global mean surface temperature anomalies. Anomalies are computed relative to a 1991-2020 baseline using ERA5 data. The second graph is monthly carbon dioxide abundance. The CO2 graph is the Keeling Curve. Current levels are 428 ppm. The third graph is monthly global methane abundance. Current levels are 1939 ppb. The fourth graph is monthly global nitrous oxide abundance. Current levels are 340 ppb. The three greenhouse gases show seasonal cycles and long-term increasing trends using data from NOAA GML. The global mean surface temperature anomaly record also exhibits decadal variability and a long-term increasing trend. All graphs are rising and shown in four different colors, including white, yellow, orange, and pink.

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Zack Labe @zacklabe.com · 25/09/2026

Quick oceans update: yah, sea surface temperatures remain in new territory this year. See more at zacklabe.com/climate-chan.... This data (extrapolar ocean) is provided by @copernicusecmwf.bsky.social ERA5. 🌊

Graph showing daily global mean sea surface temperatures for 2026. This is also compared to the daily data from the 1981-2010 average and 1991-2020 average. Annotations are also shown to the current year with the other years from 1940 to 2026. There is a seasonal cycle. There is a long-term warming trend. 2023 and 2024 are also indicated, which were the warmest years on record. Data is from ECMWF ERA5 reanalysis and updated through 23 September 2026.

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Zack Labe @zacklabe.com · 25/09/2026

Friday ice update - #Arctic sea ice extent is currently the 16th lowest on record (JAXA data) • about 280,000 km² above the 2010s mean • about 770,000 km² below the 2000s mean • about 1,920,000 km² below the 1990s mean • about 2,640,000 km² below the 1980s mean More: zacklabe.com/arctic-sea-i...

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Zack Labe @zacklabe.com · 25/09/2026

All latitude bands outside of the Antarctic saw above average temperatures over the last 3 months. The tropical warming is notable, which is partly associated with El Niño. [Plot shows zonal-mean surface air temperature anomalies, where latitude = y-axis (not scaled by distance). Data: GISTEMPv4]

Bar graph showing zonal mean surface air temperature anomalies for the period of June 2026 to August 2026. Most all latitude bands, except the Antarctic, observed above average temperature anomalies, especially in the Northern Hemisphere.

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The first nor'easter of the season will bring big impacts to coastal areas around the Northeast this weekend. Learn more in www.climatecentral.org/climate-shif... "Human-caused climate change is also contributing to rising sea levels and exacerbating flooding outlooks along the East Coast. "

Map of Climate Shift Index: Ocean for 23 September showing the change in current sea surface temperature likelihood due to climate change. Most all areas in the Western Atlantic are at least 10x more likely due to climate change. Data is based on NOAA OISSTv2.1.

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Large portions of the #Arctic Ocean are getting wetter in the month of September. The largest trends are found in the Barents-Kara Seas and toward eastern Greenland. + Data from GPCP: psl.noaa.gov/data/gridded... + More info: doi.org/10.25923/11n...

Polar stereographic map showing September precipitation trends over the period of 1979 to 2025. Nearly all areas are getting wetter across the Arctic in this month. Data is from GPCP.

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The global mean temperature over the last 3 months was record warm (June-July-August). We don't truly experience the global mean of course, so here's a look at those departures regionally around the world... 🟥 warmer than average 🟦 colder than average Dataset described in doi.org/10.1175/BAMS...

Global map showing surface air temperature anomalies for the June 2026 to August 2026 period across the entire planet. Most all areas were warmer than average. This data set is from NOAA's NOAAGlobalTempv6.1.0 using anomalies with a 1991-2020 climate baseline. Red is shown for warmer than average temperatures, and blue is shown for colder than average temperatures.

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Autumnal equinox marks start of fall, but heat could stick around

"Every El Niño has its own flavor. Each one is different. And so that's really important to keep in mind." via @usatoday.com at www.usatoday.com/story/news/w...

usatoday.com

Fall officially starts on Sept. 22, but the temperatures still may be warmer than expected.

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🚨 It's official - 2026 observed the 10th lowest annual minimum #Arctic sea ice extent (statistical tie). My next climate viz blog will focus on this past summer season. This minimum was set 2 days earlier than average. For more information: @nsidc.bsky.social at nsidc.org/sea-ice-toda...

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Yes definitely - we should be using this measure to discuss El Niño intensity!

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Mark Gongloff @markgongloff.bsky.social · 23/09/2026

Wednesday El Niño update - Unsurprisingly, sea surface temperatures still remain record warm across the central Pacific. But when discussing headlines like the “strongest” El Niño, it’s an oversimplification to ignore the role of long-term tropical warming (from climate change). Data: OISSTv2.1 🌊

Map of September 21, 2026 average sea surface temperature anomalies in the ENSO monitoring regions. Data is from NOAA OISSTv2.1 with anomalies relative to a 1991-2020 baseline.

Graphic showing the 4-week change in sea surface temperature anomalies across the tropical eastern Pacific Ocean from August 22, 2026 to September 21, 2026. Data is from NOAA OISSTv2.1

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Reposted by Zack Labe

Urban heat island effects are bad enough. Clustering data centers in cities, each of which can produce the heat of 54,000 houses, will make it exponentially worse, especially in already hot places like Phoenix Gift link to this great @bloomberg.com infographic: www.bloomberg.com/graphics/202...

bloomberg.com

AI Data Centers Release Heat, Posing New Problem for Cities

As facilities to power AI grow larger and are built in clusters, they are spreading hot air beyond their property lines

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"As August came to a close, nearly 8.3 million acres had burned across the U.S., setting a year-to-date record. This isn’t particularly surprising." ➡️ Read our latest monthly state of the climate report: www.climatecentral.org/climate-brie.... Download and share more global/US climate visuals too.

A map of the United States showing notable weather and climate events in August 2026. Examples are shown for tornadoes in Pennsylvania, record precipitation in the Ohio Valley, extreme heat in Miami, rapid drought onset in Texas, Hurricane Lala in Hawaii, damaging wildfires in Alaska, nighttime warmth in the Southwest, wildfires in the Pacific Northwest, central U.S. severe weather, and tornadoes in Illinois. The graphic is produced by Climate Central using NOAA data and information. More information at https://www.climatecentral.org/climate-briefings.

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