The 2027 agenda
Eight bounded questions open the 2027 planetary boundaries agenda. Each comes from a baseline finding, names the initiative that will carry it and the first output due in the 2027 planetary boundaries edition.
Contents
- ·Edition home
- ·Executive summary
- 1Pressure builds across the system
- 2Key findings
- 3Systems and sectors at baseline
- 4Risks and capability
- 5Ocean heat and reef loss that overlaps stress on the Atlantic circulation and the Amazon
- 6Readings from the other desks
- 7The 2027 agenda
- 8Systems in depth
- AMethodology
- BData appendix
- CReferences and record
- ·Complete edition, for print
7.1Questions for the operational series
- P-01
How would reef loss, a weaker Atlantic circulation and Amazon stress combine in the same decade?
INI-SR09-CMP-01 · compound Earth-system pathway; first output: dependency analysis for six regions.
- P-02
Which boundary interactions are strong enough to move a second boundary when one is crossed?
INI-SR09-INT-02 · boundary interactions; first output: interaction register.
- P-03
Where do published studies disagree on tipping thresholds, and why?
INI-SR09-THR-03 · threshold disagreement; first output: threshold comparison table.
- P-04
What would a long, direct record of Atlantic circulation strength change in the evidence?
INI-SR09-OCN-04 · ocean circulation record; first output: record and gap map.
- P-05
Which regions hold the most exposed forests, reefs and ice, and which people depend on them?
INI-SR09-EXP-05 · regional exposure; first output: exposure overlay.
- P-06
Which boundaries have agreed control variables, and which do not?
To be admitted in 2027; first output: coverage note.
- P-07
How do boundary limits translate to national and company scale?
To be admitted in 2027; first output: scoping note.
- P-08
Which Earth-system capabilities have been tested in practice, and which are only planned?
Earth-system capability register; first output: rung evidence for 15 functions.
7.2Portfolio proposed for the Q1 2027 alignment
Five initiatives and one Universe mission candidate are proposed for the 2027 planetary portfolio. They are programme objects: no partner, funder or member is attached to them in this edition.
| ID | Object | Kind | Question | State |
|---|---|---|---|---|
| INI-SR09-CMP-01 | Compound Earth-system pathway | Initiative | P-01 | PROPOSED |
| INI-SR09-INT-02 | Boundary interactions | Initiative | P-02 | PROPOSED |
| INI-SR09-THR-03 | Threshold disagreement | Initiative | P-03 | PROPOSED |
| INI-SR09-OCN-04 | Ocean circulation record | Initiative | P-04 | PROPOSED |
| INI-SR09-EXP-05 | Regional exposure | Initiative | P-05 | PROPOSED |
| MSN-SR09-2027-01 | Compound reef, ocean and forest Universe mission | Mission | P-01 | Candidate |
7.3The pathway
The planetary boundaries edition reads national chapters, sector editions and the global edition through one governed evidence graph. At baseline the federation is designed and its first editions are drafted. This page states what exists today and what comes next.
- 01
National environment chapters
boundary reading in each national edition
IN PREPARATION · national baselines
- 02
Sector editions
climate, water, biodiversity, food
PLANNED · sector Baseline Editions
- 03
Planetary boundaries model
the Earth system of systems
v0 SPECIFIED · v1 with federation evidence
- 04
Strategic links
SR-07 food, water and energy · SR-06 insurance · SR-02 lifelines
PLANNED · strategic baselines
- 05
Universe
annual proving environment
CANDIDATE MISSION · mandate in 2027
- 06
Planetary Boundaries Report
this series
BASELINE DRAFT · 2027 annual edition
- 07
Evidence and correction
one graph, many projections
OPEN · first correction cycle in 2027
7.4Universe 2027: evidence pack for the planetary boundaries candidate mission
- 01
Mandate
- 02
Core Build · 1 month
- 03
Action · 1 week
- 04
Evidence seal
- 05
Portfolio correction
- 06
Next mandate
| Item | Record | State | Timing |
|---|---|---|---|
| F1 | Annual mandate record | PLANNED | after the Q2 2027 alignment |
| F2 | Core Build record | PLANNED | one month before the exercise |
| F3 | Exercise evidence | PLANNED | during the Action week |
| F4 | Decision packets | PLANNED | exercise state only |
| F5 | Proof receipts | PLANNED | scoped to each recorded check |
| F6 | After-action report | PLANNED | within one quarter |
| F7 | Upgrade docket | PLANNED | routed to the Portfolio |
| F8 | Portfolio renewal | PLANNED | 2027 planetary boundaries annual edition |
| F9 | Public synthesis | PLANNED | public-safe extracts only |
Mission
- ID
- MSN-SR09-2027-01 · Compound reef, ocean and forest Universe mission
- Role spine
- Leadership sponsor · Institutional anchor · Mission lead: drawn from national pathways
- Receiving actors
- to be identified with the mandate
7.5Handoffs and routing
Where the baseline’s findings go next. A handoff routes a finding for awareness, review or work; it transfers no authority.
| Finding | Routed to | Purpose | Class |
|---|---|---|---|
| SYS-001 · boundary status | regional consortia | boundary overlay | PUBLIC |
| CLI-002 · temperature | INI-SR09-THR-03 | threshold comparison | PUBLIC |
| CLI-005 · reef threshold | INI-SR09-CMP-01 | compound pathway | PUBLIC |
| CLI-007 · ocean circulation | INI-SR09-OCN-04 | record and gap map | PUBLIC |
| BIO-008 · Amazon transitions | INI-SR09-EXP-05 | regional exposure | PUBLIC |
| BIO-009 · species and land | sector editions | biodiversity chapters | PUBLIC |
| WAT-010 · freshwater change | INI-SR09-INT-02 · key F review | boundary interactions | PUBLIC |
| SYS-012 · compound pathway | MSN-SR09-2027-01 | Universe candidate | CONSORTIUM |
| Class | Where it goes | Who can see it |
|---|---|---|
| PUBLIC | the published edition and its evidence bundle | anyone |
| CONSORTIUM | governed rooms of the federation | consortium members under agreement |
| CONTROLLED | need-to-know channels | named competent actors only |
7.6Feeds and signal register
| Feed | Producer | Latency | Feeds into |
|---|---|---|---|
| Global temperature bulletins | Copernicus and ECMWF | monthly | CLI-002 |
| Atmospheric CO2 series | NOAA | annual | CLI-003 |
| Emissions Gap Report | UNEP | annual | CLI-004 |
| State of the climate updates | WMO | annual | CLI-002 |
| Global Carbon Budget | Global Carbon Project | annual | CLI-003 |
| Planetary Health Check | Planetary Boundaries Science | annual | SYS-001 |
| Tipping points assessments | University of Exeter and partners | periodic | CLI-005 |
Escalation routes
- none · keep monitoring
- research question
- project
- risk object
- annual publication
- signal report
| ID | Signal | Corroboration | Systems | Route |
|---|---|---|---|---|
| SIG-SR09-001 | Reef mortality beyond the central threshold estimate in 20257 | CORROBORATED | CLI · BIO | risk object RSK-SR09-CLI-001 |
| SIG-SR09-002 | Disagreement among studies on the Atlantic circulation161718 | PARTIAL | CLI · WAT | research question P-03 |
| SIG-SR09-003 | Compounding disturbance in Amazon forests19 | PARTIAL | BIO · WAT | risk object RSK-SR09-BIO-002 |
Notes
Numbers are the edition’s reference numbers, so a note reads the same in every chapter. The full list, with every source and its licence, is in Annex C. Annex C, references
- 7Lenton, T.M. et al. (eds.), Global Tipping Points Report 2025 (release page read, not the full report; 10 October 2025; coral reef threshold central estimate 1.2 degrees C, range 1 to 1.5). University of Exeter, Exeter. Observation year 2025. Accessed 2026-11-03.back
- 16Baker, J. et al., Continued Atlantic overturning circulation even under climate extremes, Nature 638, 987 to 994, 2025 (34 models; collapse this century judged unlikely; weakening still expected; abstract and Met Office release read). Observation year 2025. Accessed 2026-11-03.back
- 17van Westen, R.M., Kliphuis, M. and Dijkstra, H.A., Physics-based early warning signal shows that AMOC is on tipping course, Science Advances 10, eadk1189, 2024 (full text read). Observation year 2024. Accessed 2026-11-03.back
- 18Ditlevsen, P. and Ditlevsen, S., Warning of a forthcoming collapse of the Atlantic meridional overturning circulation, Nature Communications 14, 4254, 2023 (abstract read: collapse estimated around mid-century; a 2025 erratum is listed and was not read). Observation year 2023. Accessed 2026-11-03.back
- 19Critical transitions in the Amazon forest system, Nature 626, 555 to 564, 2024 (authors not recorded here; abstract read: 10% to 47% of forests exposed to compounding disturbances by 2050). Observation year 2024. Accessed 2026-11-03.back
