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Cryosphere

vr.wm-ear-006 · wm-ear-006-cryosphere

Glaciers, ice sheets, sea ice, snow cover and permafrost and their measured change.

World Models Physical world and living systems PHY.EAR.CRY
Bundle → Layer → Finding → QuestionsClassifiersWhat it isWhy it existsDistinguishing featuresWhat robots and AI may and may not doMoral aspectsOwnersLinks to other meta-modelsIdentity and identifiersDirect propertiesRecognitionCapabilities and actionsHazards and failure modesStandards and interfacesContext of useSources

Bundle → Layer → Finding → Questions Filled

3 bundles · 4 layers · 5 findings · 10 questions

Ice and snow units Which frozen body or extent is meant.

Unit identity and extent

The glacier, ice sheet, sea ice area, snow cover or permafrost zone and its outline.

Unit identity

The unit named with its inventory identifier and kind.

  1. Which kind of cryosphere unit is this, and which inventory identifier does it have?
  2. Which outline and date define its extent?

Extent change

How area or extent has changed over time.

  1. What area does the unit cover on the observation date?
  2. How does the extent compare with earlier observations?
State and change How much ice there is and how it changes.

Mass and thickness

Mass balance, thickness and volume of the unit.

Mass balance

The gain or loss of mass over a period and its method.

  1. What mass balance was measured for the period, and by which method?
  2. What is the uncertainty of the estimate?

Thermal state

Temperature and thaw of ice and frozen ground.

Ground and ice temperature

Temperatures at depth and active layer thickness.

  1. What temperature was measured, at what depth and when?
  2. How thick is the seasonal thaw layer?
Hazards and impacts What the changes mean for people and infrastructure.

Cryosphere hazards

Hazards arising from ice, snow and thaw.

Hazard exposure

Avalanche, outburst flood, ice instability and thaw subsidence exposure.

  1. Which hazards does the unit pose, and to which settlements or infrastructure?
  2. Is the unit monitored, and by whom?

Classifiers Filled

Family
World Models
Category
Physical world and living systems
Entry kind
standalone-mm
Navigation path
NAV.PHY.EAR.CRY
Domain
PHY.EAR.CRY
Industry
Cross-industry
Tags
cryospherephy.ear.cry

What it is Filled

The cryosphere is the part of the Earth system where water is frozen: glaciers, ice sheets and ice shelves, sea ice, lake and river ice, snow cover and permafrost. Each unit is a physical body or extent with mass, area and condition that change with climate; liquid water bodies and the atmosphere are neighbouring subjects.

Why it exists Filled

Glaciers, ice sheets, sea ice, snow cover and permafrost and their measured change.

Distinguishing features Filled

  • It covers frozen water in all its forms, while hydrology covers liquid water bodies.
  • Units are physical bodies or extents with measured mass, area and temperature, not weather events.
  • Change over decades is central, so time series and inventories matter more than single states.
  • Distinct from climate, which describes long-term statistics that the cryosphere both responds to and shapes.

What robots and AI may and may not do Filled

Must not

  • Issue its own avalanche or ice-safety warnings in place of the responsible service.
  • Declare ice, snow or frozen ground safe to cross or build on.
  • Present modelled values as measurements.
  • Drop uncertainty statements from reported values.

Only with a human decision

  • Issuing hazard warnings or closures.
  • Approving infrastructure on permafrost or near glacial hazards.
  • Sending people or robots onto glaciers, sea ice or avalanche terrain.

May

  • Report extent, mass balance and temperature from published inventories and observations.
  • Combine satellite and in-situ data with their uncertainties stated.
  • Flag units with rapid change for expert review.
  • Relay official avalanche and outburst flood warnings.

Moral aspects Filled

  • Ice loss drives sea level rise and water scarcity for large populations downstream.
  • Arctic and mountain communities depend on ice and snow for travel, food and culture.
  • Hazard information must be timely and clear, since errors cost lives.

Who is affected

  • Arctic and mountain communities
  • Downstream water users
  • Coastal populations exposed to sea level rise
  • Scientists and monitoring services

Owners Filled

Steward

A national or international scientific monitoring service that maintains the inventory and observation series for the units.

Master systems

  • Glacier inventory
  • Sea ice and snow cover data archive
  • Permafrost monitoring network database

Links to other meta-models Filled

neighbor

  • wm-ear-002-climate - The cryosphere responds to and shapes the climate.
  • world-p3-water-body-and-hydrology - Meltwater feeds rivers, lakes and the ocean.

references

  • wm-ear-009-eo-product - Most extent and mass observations come from Earth observation products.

What else AI and robots need to interact with it Filled

Identity and identifiers required Filled

  • Glaciers are identified by GLIMS identifiers and Randolph Glacier Inventory identifiers.
  • Permafrost boreholes and snow stations carry network station identifiers.
  • Sea ice and snow extents are identified by product, region and date.

Direct properties required Filled

  • Area or extent in square kilometres, with outline date and source.
  • Ice thickness in metres and volume in cubic kilometres, with method.
  • Mass balance in metres water equivalent or gigatonnes per year, for a stated period.
  • Snow water equivalent in millimetres and snow depth in centimetres.
  • Ground or ice temperature in degrees Celsius at a stated depth, and active layer thickness in metres.
  • Surface albedo as a fraction, under stated illumination conditions.

Recognition required Filled

  • Ice and snow are recognised in optical and radar imagery, but clouds, debris cover and wet snow confuse classification.
  • Debris-covered glaciers are easily mistaken for moraine; permafrost is not visible and is inferred from temperature.

Capabilities and actions required Filled

  • Units gain or lose mass and area, and can surge, calve or disintegrate.
  • Snow cover and sea ice form and melt seasonally.
  • Permafrost thaw releases carbon and destabilizes ground.

Hazards and failure modes required Filled

  • Avalanches and crevasses on snow and glaciers.
  • Glacial lake outburst floods and ice avalanches.
  • Thin ice on lakes, rivers and sea.
  • Ground subsidence and slope failure from permafrost thaw.

Standards and interfaces required Filled

  • CF conventions for NetCDF for gridded cryosphere data.
  • GCOS Essential Climate Variables definitions for glaciers, ice sheets, sea ice, snow and permafrost.
  • OGC web services for publishing extents and maps.

Context of use required Filled

  • Observed by satellites, field campaigns and long-term monitoring networks.
  • Used in climate assessment, water management, hazard warning and Arctic shipping.

Sources Filled

  1. Global Climate Observing System Essential Climate Variables (WMO)
  2. Special Report on the Ocean and Cryosphere in a Changing Climate (IPCC)
  3. Global Land Ice Measurements from Space glacier database (GLIMS)

Open questions

  • Planned model: boundary questions, research and every section remain to be written.

Machine files

Card as JSON Specification AGENTS.md Card backlog vercy.card/1

Provenance

planned (registry candidate) · todo

Built from: models/runtime-index.json, ver-cy/world-models/card-supplements/wm-ear-006-cryosphere.json

Planned entry, hidden from the catalogue until researched.