# earth-now.co
# Author:  Simon-Pierre Boucher
# Contact: contact@spboucher.ai
# File:    packages/registry/metrics/ocean.yaml
# Purpose: MVP ocean & cryosphere metrics (catalog §4, 🥇) — sea level rise and Arctic sea ice extent

metrics:
  - id: sea_level_rise
    name:
      fr: "Élévation du niveau de la mer (depuis 1993)"
      en: "Sea level rise (since 1993)"
    domain: ocean
    priority: mvp
    kind: stock
    level: 2
    model: seasonal-spline-v2
    unit: mm
    sources:
      - id: nasa_aviso
        name: "NASA Sea Level / AVISO altimetry"
        url: https://sealevel.nasa.gov/
        license: "US Government public domain (cite NASA)"
        cadence: monthly
    refresh: on_source_update
    display:
      decimals: 1
      sigFigs: 4
      unit: { fr: "mm", en: "mm" }
    constraints: { maxAbsRatePerSec: 0.000001, maxJumpOnRefit: 2 }
    windows: [total]

  - id: arctic_sea_ice
    name: { fr: "Étendue de la banquise arctique", en: "Arctic sea ice extent" }
    domain: ocean
    priority: mvp
    kind: stock
    level: 1
    model: keeling-fusion-v1
    unit: km2
    sources:
      - id: nsidc_sii
        name: "NSIDC Sea Ice Index"
        url: https://nsidc.org/data/seaice_index
        license: "NSIDC open data — cite NSIDC"
        licenseNote: "verify exact reuse terms before launch"
        cadence: daily
    refresh: on_source_update
    display:
      decimals: 2
      sigFigs: 3
      scale: 0.000001
      unit: { fr: "M km²", en: "M km²" }
    constraints: { maxAbsRatePerSec: 5, maxJumpOnRefit: 500000 }
    windows: [total]
    editorialNote:
      fr: "Cycle saisonnier très marqué (max ~mars, min ~septembre) ; tendance long terme à la baisse."
      en: "Strong seasonal cycle (max ~March, min ~September); long-term declining trend."