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GCRI · Climate and Hazards

Reviewed models and scenarios

Model descriptions for Climate and Hazards are published here once reviewed, with their assumptions, evidence and validation. They describe models; they are not live simulations.

02What is shown

Released, referenced and rights-cleared.

  • Time and space reference for every view.
  • Sources and licence.
  • Uncertainty and known limits.
  • Version and date of release.
03Model classes

The kinds of model hazard work relies on.

Model classOpen examplesQuestion it answersValidation
Global climate modelsCMIP ensemblesLarge-scale climate changeHistorical simulation, process diagnostics
Regional climate modelsCORDEX ensemblesRegional detailObserved regional climate
Probabilistic seismic hazardOpenQuakeGround-shaking probabilitiesObserved ground motions
Event attributionMethods used in attribution studiesChange in likelihood of an observed eventModel evaluation for the event type
04Process

How the process runs.

Process explorer · Process

Reviewed models and scenarios: Hazard, exposure, vulnerability

10 steps4 stages

Process

Reviewed models and scenarios: Hazard, exposure, vulnerability

In IPCC AR6 Working Group II, climate risk results from interactions between hazards and a system’s exposure and vulnerability, and responses can add risk.

  1. 01 Drivers

    1. 01HazardDataset · Hydrological serviceThe potential occurrence of a natural or human-induced physical event or trend that may harm people, property, services or ecosystems.
    2. 02ExposureDataset · Hydrological serviceThe presence of people, livelihoods, species, ecosystems, infrastructure or assets in places and settings that could be adversely affected.
    3. 03SensitivityDataset · Hydrological serviceThe degree to which a system or species is affected, either adversely or beneficially, by climate variability or change.
    4. 04Capacity to cope and adaptDataset · Hydrological serviceThe ability of systems, institutions, humans and other organisms to adjust to damage, take opportunities or respond to consequences.
  2. 02 Assessment

    1. 05Risk from responsesComponent · Hydrological serviceRisks from climate responses arise when responses miss their objectives, or from trade-offs or negative side effects.
    2. 06VulnerabilityComponent · Hydrological serviceThe propensity or predisposition to be adversely affected. It includes sensitivity to harm and lack of capacity to cope and adapt.
    3. 07RiskModel · Climate and HazardsRisk results from dynamic interactions between hazards and the system’s exposure and vulnerability. Each may be uncertain and change.
  3. 03 Response

    1. 08Risk management and responseStep · Hydrological serviceRisk management is plans, actions, strategies or policies that reduce the likelihood or size of adverse consequences.
    2. 09Residual riskRecord · Hydrological serviceThe climate impact risk that remains after adaptation and mitigation efforts. Adaptation can redistribute risk between areas and groups.
  4. 04 Decision

    1. 10Decision by the responsible partyDecision · Hydrological serviceThe framing names no single decision maker. Decisions on responses rest with the responsible party under its own rules.

Outline of an external standard or method, from its public sources. It describes what the framework says, not a record of any run. It does not show that Nexus or any partner performs, certifies or approves a step. A gate is a step of the method, never a Nexus approval.

05Status

Releases appear as they are reviewed.

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06Sources

Where this page’s references lead.

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07Questions

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Climate and Hazards

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