The 2026 state of the climate report: challenges and opportunities

In a report series in BioScience, William Ripple, Christopher Wolf and colleagues track the climate's "planetary vital signs" alongside indicators of the human activities driving the change.¹ It was published in BioScience on 14 October 2026.² Of sixteen climate-related indicators, seven (44%) were at record extremes, and several showed accelerating trends or abrupt shifts.¹

The sixteen climate-related series in its first figure, grouped as the paper groups them:³

• Greenhouse gases: carbon dioxide, methane and nitrous oxide concentrations.
• Temperature: surface temperature anomaly, and extremely hot days relative to 1961–1990.
• Ocean: ocean heat content, ocean acidity (pH) and sea level relative to the 1993 mean.
• Ice: minimum Arctic sea ice, Greenland and Antarctic ice mass, and glacier thickness.
• Energy balance: Earth's energy imbalance and global average albedo (the share of sunlight reflected back to space).
• Fire: area burned in the United States and global tree cover loss due to fires.³

A second figure tracks the human side: population, livestock and meat, fossil fuel and renewable energy use, emissions, economic output, tree cover loss, Amazon deforestation, electric car sales and adaptation finance.¹ Every series comes from public datasets, listed with methods in the paper's supplement.¹

Some of the year's readings, as the paper gives them:¹

• Carbon dioxide passed 428 ppm in May 2026, about 50% above pre-industrial levels, and methane and nitrous oxide also set records.
• Glacier thickness and Greenland ice mass were at record lows; ocean heat content and sea level at record highs, on preliminary data.
• Fossil fuel use rose 0.9% in 2025, with oil, coal and gas each at a record, and energy-related CO2 emissions passed 41 Gt for the first time. Solar and wind use grew about 18%, and in 2025 renewables overtook coal in global electricity generation.
• Tropical primary forest loss fell 36% from 2024 to 2025, and Amazon deforestation fell for the fourth year running. Tree cover lost to fire, 10.8 million hectares in 2025, was the third highest on record.
• Adaptation finance was about US$64 billion in 2024, against an estimated US$310–365 billion a year that developing countries alone will need by 2035.

The paper reads the rate of warming as accelerating: about 0.05 °C a decade from 1880 to 1970, 0.19 °C from 1970 to 2010, and 0.36 °C from 2010 to 2024, so that 2 °C above pre-industrial could be reached before 2050 at current rates.¹ It also cites work that finds the 2023–2024 temperature spike consistent with climate model simulations, and notes that extreme weather may be what the models capture least well.¹ On tipping points, it cites estimates that warming combined with deforestation could tip the Amazon at 1.5–1.9 °C, against 3–5 °C for warming alone, and that feedbacks from permafrost, wetlands, freshwaters and fire could add 20–30% to post-2020 human-caused warming by 2100.¹

Two tables are of most use to someone modelling a place. Table 1 lists nineteen extreme weather events from September 2025 to July 2026, with links in the supplement to the ClimaMeter attribution analysis of each; among them, Hurricane Melissa (95 deaths, over US$12 billion in damage), the November 2025 floods in Sumatra (708 deaths) and the June 2026 European heatwave (about 14,000 excess deaths on a preliminary estimate).¹ Table 2 pairs eight threats (extreme heat, flooding, wildfire, drought, sea-level rise, food system instability, storms and grid failure, freshwater shortage) with "fast-track" adaptation responses and their side benefits: urban trees and reflective roofs for heat, wetland restoration and permeable surfaces for floods, prescribed burns and defensible space for fire, mangroves and living shorelines for the coast, microgrids and batteries for the grid.¹ The authors expect these measures to work less well as warming grows.¹

Among interactive tools for understanding climate solutions, the paper names En-ROADS, where a user combines policies, technologies and social changes and sees the effect on warming, and the Drawdown Explorer, which assesses individual solutions for effectiveness, scale, side benefits and risks.¹ The data are public; the paper itself is under the publisher's standard terms, so its figures are not reproduced here.¹ The Vitals page of this wiki keeps a smaller set of running series from open daily and weekly feeds.