The Global Centre for Risk and Innovation (GCRI)
Model descriptions are published here once reviewed, with their assumptions, evidence and validation. They describe models; they are not live simulations.
Food · Reviewed models and… · Run R-5133
same inputs, versioned
| R-7562 | Agricultural, soil and… | v4.7 | 0.41 | Running |
| R-5510 | Ecology and… | v9.7 | 0.80 | Drift |
| R-4269 | Earth observation and… | v7.3 | 0.53 | Passed |
| R-9463 | Spatial statistics and… | v6.3 | 0.87 | Failed test |
Food Nexus · Build workspaceBuild workspace, in outline: domain structure with placeholder names and illustrative values, not a record.
Food Nexus reviewed models are published descriptions of the models used in the food and agriculture field, with their assumptions, data, validation and limits, built on methods such as agricultural, soil and food science as well as ecology and biodiversity science. They describe models; they are not live simulations, and no output on them is a finding.
Fig.A programme from scoping to the owner's decision. Design, not a record.
Plains, deltas and basins, the corridors that carry food to ports, and how far each division sits from one, shown for Africa as an example geography for this subject.
| Model class | Open examples | Question it answers | Validation |
|---|---|---|---|
| Process-based crop models | DSSAT, APSIM, WOFOST | Yield response to weather, soils and management | Field trials and multi-model comparison |
| Global gridded crop models | Models in the ISIMIP and AgMIP ensembles | Large-scale yield change under climate scenarios | Reproduction of historical yield anomalies |
| Partial-equilibrium market models | IMPACT, GLOBIOM, the OECD-FAO Aglink-Cosimo model | Prices, trade and production under shocks | Back-casting of past price episodes |
| Food security outcome models | Livelihood and household economy approaches | Who loses access when prices or incomes change | Comparison with survey outcomes |
Price paths from market models are scenarios. They are not forecasts and are not used for trading.
Analysis runs in Nexus Foundry; reviewed releases are listed here.
Each term as this page uses it. Where a standard-setting body defines the term, the wording follows that body.
| Term | Definition |
|---|---|
| Model validation | Comparing model predictions with independent observations to judge fitness for a stated use. |
| Model card | A short document describing a model's intended use, training data, performance and limits. |
| Uncertainty quantification | Characterising and propagating the uncertainties in a model to state confidence in its outputs. |
| Surrogate model | A fast statistical model trained to approximate a slow simulation or experiment. |
The bodies and documents this page is read against. Status and editions change; each link goes to the issuing body.
The current service level is R0: information and enquiries. An enquiry receives a reference and names the next step; applications, payments, compute allocations and registrations open only when their team, terms and review capacity exist.