Open data · since 2019
Meridian brings climate, energy, cities and the ocean into a set of interactive dashboards and explainers that read without a degree.
Surface-temperature departure from a baseline period. Shading marks the confidence band.
KPI
A fresh cut from the four thematic panels — with decade-long trends.
Dashboards
Four domains of observation. Each panel is interactive and re-themes itself to match your appearance settings.
Temperature anomalies and greenhouse gases
Long-run series of temperature anomalies, CO₂ concentration and derived warming indicators.
GlobalGeneration mix and daily load
The evolving generation mix by source, the renewable share and the daily consumption profile.
Model regionMobility, congestion and transit
Trip modal split, a congestion heatmap and the recovery of transit ridership.
Metropolitan areaSea level, temperature and heat content
Rising mean sea level, sea-surface temperature and accumulated ocean heat content.
Global oceanParticulates, AQI and the daily cycle
PM2.5 dynamics, the split of days by air-quality category and the daily profile of traffic-driven pollution.
City networkAge structure, growth and urbanisation
The age–sex pyramid, population size and growth rate, the urban share and the demographic transition.
Model countryReports
Long reads with methodology, graphics and takeaways — no filler.
The planet's average temperature is almost useless on its own. Here is why science measures departures from a baseline, what the CO₂ curve actually shows, and how to read warming stripes.
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Cities rarely "destroy" pollution — they move it in time and space. What an improving statistic really means, and where the exported emission hides.
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A truncated axis, a dual scale and a cherry-picked interval — three tricks that turn honest data into a dishonest conclusion. Demonstrated on the very same numbers.
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The age pyramid is the most honest portrait of a society. We unpack why it changes shape, what the demographic transition is, and why population growth does not switch off at once.
Read moreMethodology
Every series is documented in the methodology, exported in open formats and published under a CC BY 4.0 license.