Last month's total #Arctic sea ice volume averaged the 3rd lowest on record for the month of August. This was about 72% below 1979 levels and 54% below the 1979-2024 August average.

More at https://zacklabe.com/arctic-sea-ice-volumethickness/. Data from PIOMAS.

️ While extent will not be setting any annual minimum records this year, the average thickness of #Arctic sea ice is actually at historic lows for this time of year (in the dataset by PIOMAS). Thinner ice is younger and usually more fragile.

More graphics of thickness and volume: https://zacklabe.com/arctic-sea-ice-volumethickness/

Last month was again the 3rd hottest (after 2023/2024) August on record globally. This was around 1.29°C above the 1850-1900 "pre-industrial" reference period. Striking anomalies in Siberia and Antarctica.

Summary of month at https://climate.copernicus.eu/surface-air-temperature-august-2025 using @CopernicusECMWF ERA5 data.

Changes in September temperatures in the #Arctic by decade. The largest warming is co-located with areas of melting sea ice, such as the along the Eurasian coast.

Data from https://doi.org/10.24381/cds.f17050d7

Carbon dioxide (CO₂) averaged about 425 ppm in August 2025

10 years ago August averaged about 399 ppm

Data available at https://gml.noaa.gov/ccgg/trends/