GCRI · Oceans and Coasts
Methods and uncertainty
The methods Oceans and Coasts relies on: their equations and assumptions, the data they need, how they are validated and the limits of what they can show.
Methods and uncertainty on the record.
- 01FieldsOceans and coasts, Climate and hazards, Biodiversity and nature
- 02STEM methods7 canonical methods applied
- 03Topics8 subject pages
- 04Counterparts7 platforms in shared fields
- 05PublisherThe Global Centre for Risk and Innovation
The methods in use.
- 01Ocean and coastal scienceRegional sea-level budgets · Marine heatwave analysis · Wave climate assessmentApplied here
- 02Earth observation and remote sensingOcean colour and blooms · Shoreline change mapping · Coastal habitat mappingApplied here
- 03Extreme value theory and tail riskExtreme sea level return levels · Amplification factors · Extreme wave heightsApplied here
- 04Ecology and biodiversity scienceReef condition monitoring · Stock assessment inputs · Restoration monitoringApplied here
- 05Geospatial information systemsCoastal exposure mapping · Marine spatial planning layers · Fishing effort mappingApplied here
- 06Earth and geophysical scienceDelta subsidence · Sediment budgets · Tsunami source characterisationApplied here
- 07Water and environmental engineeringCoastal defence options · Coastal wastewater planning · Adaptation pathwaysApplied here
Each method, its role in this field and how it is checked.
- Ocean scienceRole hereOcean and coastal science is the core science this platform stewards for the network.Checks appliedBudget closure; Climatology consistency; Model-buoy comparison
- Earth observationRole hereEarth observation measures the ocean surface and coast from space: temperature, colour, sea level, waves, ice, habitats and shoreline change.Checks appliedIn situ match-ups; Tide correction; Accuracy by class
- Extreme valueRole hereExtreme value statistics estimate rare high sea levels, waves and marine heat from limited records.Checks appliedRecord length; Tail fit diagnostics; Independence of peaks
- EcologyRole hereEcology studies how marine species and ecosystems function and respond to pressure.Checks appliedStandardised protocols; Reference comparison; Observer calibration
- GeospatialRole hereGeospatial information systems map coasts, seas and their uses.Checks appliedVertical accuracy; Data currency; Stakeholder review
- GeoscienceRole hereEarth and geophysical science explains the coast’s solid ground: sediment supply, subsidence, tectonic movement and submarine hazards.Checks appliedGNSS comparison; Budget uncertainty; Source model review
- Environmental engineeringRole hereEnvironmental and coastal engineering design defences, drainage, wastewater treatment and nature-based coastal protection.Checks appliedDesign standard review; Downdrift effects; Pathway triggers
How the process runs.
Process explorer · Process
Methods and uncertainty: Source to evidence record
10 steps·4 stages·2 gates
Process
Methods and uncertainty: Source to evidence record
A source is registered and assessed, its record labelled and classified, and a Digital Evidence Passport carries provenance; a correction reaches every dependent record.
01 Intake
- 01Identify the sourceSource · The source stewardDiscovery is not ingestion. Source identification records the source class, steward, institutional role and jurisdiction.
- 03Register the sourceStepRegistration makes a discovered source a governed participant in the evidence lifecycle. It implies no endorsement or certification.
02 Assessment
- 04Jurisdiction and rights classificationGateRights classification identifies licence, consent, confidentiality and reuse limits. The result determines access and routing.
- 05Evidence quality assessmentStepQuality assessment decides whether a record is fit for a defined use. Quality is multidimensional and never a single score.
- 06Evidence labelStepEvery finding carries one of nine evidence labels. Missing data is shown as missing, never as zero.
03 Record
- 07Evidence classificationRecordClassification gives records lifecycle states, such as source-verified, public-safe or restricted. States can coexist and set evidence use.
- 08Source release and identifierRecord · NXS-GRX (canonical data, provenance and risk)A source release records rights, temporal coverage and source lineage. A UNI is allocated through a catalogue and never typed by hand.
- 09Digital Evidence PassportRecordThe passport records provenance, quality, rights, jurisdiction, permitted use and history, so evidence keeps its context when it travels.
04 Use and correction
- 02Correction reaches dependent recordsStep · NXS-GRX (canonical data, provenance and risk)A source correction propagates to dependent cuts and products without rewriting old results.
- 10Public-safe reviewGatePublic-safe review decides whether a record can be shared publicly. It is a distinct stage and is not validation.
Data protocols: evidence lifecycle · Data protocols: core data objects and evidence records · The Global Risks Index (NXS-GRX)Designed programme process, not a record of operation. No cycle has run and every programme is at service level R0. A gate is a programme decision, never a public-authority approval, certification or deployment authorisation. The data-protocol pages describe a design, not a running system.
Where uncertainty in ocean and coastal analysis comes from, and how it is shown.
| Source | Why it matters here | How it is reported |
|---|---|---|
| Ice-sheet contribution | Dominates the upper range of sea-level rise | Likely range and high-end scenarios shown separately |
| Vertical land motion | Can exceed sea-level rise locally | Tide-gauge and satellite data combined, with datum stated |
| Storm surge statistics | Short records for extremes | Return levels with intervals |
| Ecosystem response | Thresholds uncertain | Ranges and observed events |
Sea-level figures always state the datum, baseline period and scenario.
How uncertainty is reported.
- 01
State assumptions
Each analysis lists its assumptions and the data it depends on.
- 02
Quantify where possible
Ranges and confidence are reported alongside central estimates.
- 03
Validate and compare
Models are checked against observations and, where possible, against other models.
- 04
Publish limits
What an analysis cannot show is stated beside what it can.
Where this page’s references lead.
The bodies and documents this page is read against. Status and editions change; each link goes to the issuing body.
Questions and answers.
Are the methods open?
Contribute evidence from this page.
Reports is the Consortium’s quarterly publication. What you know about this subject can become evidence, a case or a correction in the next edition, credited to you and published under CC BY 4.0 where it is your own work.
- EmailGateway GW-GCRISend it from this pageEvidence, a correction, a case, a method, a review, a translation or profile input. It arrives tagged with this page, so the editor who owns it receives it.
- ZenodoOpen depositDeposit it and submit to the communityPublish your own record on Zenodo with your ORCID iD, then submit it to the Reports community there. Curators review it; the DOI stays yours.
- ReportsGCRISee every way to contributeThe contribution types, how each is reviewed, what credit you receive, the licence and what is never accepted.
Never send personal data, sensitive infrastructure detail or anything you have no right to share. A contribution is reviewed before use; sending it confers no authorship or editorial rights, and sponsorship never buys a finding.
Bring a method, a dataset or a question.
Information and enquiries are open today. 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.
Legal documents.
Maps, data and figures on this site are shown for context and general information. They are not advice, forecasts or warnings; the limits of the information are set out in the Disclaimers and Data Notices.