The Rockström framework defines nine planetary processes whose stability is now being tested by human activity. Six of the nine were judged transgressed in 2023 (Richardson et al., Science Advances) — up from three in the original 2009 paper. The list functions as a dashboard for the global environmental condition: it does not by itself drive policy, but it gives a single numerical accounting of how far the Earth system has been pushed from the Holocene baseline.
The nine boundaries, with current status: (1) Climate change — boundary 350 ppm CO₂ and +1°C above pre-industrial; transgressed (current ~420 ppm, +1.3°C). (2) Biosphere integrity — boundary <10 extinctions per million species per year; transgressed (current 100–1,000 E/MSY). (3) Biogeochemical flows — nitrogen flux ~62 Mt/yr and phosphorus ~6.2 Mt/yr; transgressed (current ~150 Mt N/yr and ~14 Mt P/yr; the Haber-Bosch process is the dominant N source). (4) Land-system change — boundary 85% of original forest cover retained globally; transgressed (current ~62%). (5) Freshwater change — re-conceptualized in 2023 as blue water (rivers, lakes, groundwater) and green water (soil moisture); transgressed in 2023, not in earlier versions. (6) Ocean acidification — boundary aragonite saturation state Ω ≥ 2.75 globally; not yet transgressed but approaching, currently ~80% of pre-industrial reference. (7) Atmospheric aerosol loading — locally transgressed in South Asia and China but no operationalized global boundary. (8) Novel entities — synthetic chemicals, plastics, antibiotic compounds; transgressed in 2022 (Persson et al.). (9) Stratospheric ozone depletion — within boundary; recovery ongoing under the 1987 Montreal Protocol, the framework's one clean success story.
The most important pattern in the dashboard is the coupling between boundaries. Climate change drives much of the biosphere-integrity loss, much of the freshwater stress, and ocean acidification. Nitrogen flux drives both biodiversity loss (eutrophication) and climate (N₂O is a potent greenhouse gas). The novel-entities boundary intersects almost every other through chemicals that affect ecosystems, climate forcing, and biogeochemistry. The one success story — ozone — was achieved by an unusually-favourable convergence: a small number of substitutable chemicals, identifiable producers, a clear and rapid scientific consensus, and binding international agreement. Whether anything comparable can be repeated for the harder boundaries is the practical question the framework most usefully sharpens.