Every Last Joule · Region record

Iceland

Provenance, tier, and validation record for iceland. No live curtailment figures on this page — those are on the globe.

Region id: iceland
Country: ISL
Waste modality: Hydro
Coordinates: 64.90° N, 19.00° W

Estimated Data quality

Tier

estimated · T3-modelled

No live feed and no published total for this region. A typical-shape profile is scaled to a capacity-based or literature anchor.

Modelled profile, scaled to annual (±40%)

Uncertainty

±40% of peak GW

Published envelope for this tier. See the uncertainty model.

Source provenance

modelled-fallback · No verified upstream link

There is no verified upstream link. The snapshot is a typical-shape profile scaled to an anchor, or otherwise estimated.

Source

Published

https://orkustofnun.is/

Tier, provenance, and source are read at build time from src/lib/regions.ts — the same table the globe draws from. The validation record below is generated separately and gated against it by npm run ci:docs-drift.

Validation record

Last updated: 2026-08-20 · Sprint: S1 + HB integration · Paper section: Technical Validation §4.2

Source

Region id: iceland
Country: ISL
Tier: estimated
Kind: hydro
Source: Published
Source URL: https://orkustofnun.is/
Loader: (no single-file loader — see multi-region source)
Structural gap: no

Calibration

Rate source documented in: docs/methodology/ (see links below)
Uniform across backfill years: n/a — no backfill

Multi-year backfill annual totals

Year	Backfill rows	Backfill annual TWh	Published TSO annual TWh	Δ %	Source
(no backfill or TSO anchors yet — will be populated after HB fan-out completes)

Published anchors

TSO annual curtailment (latest published): Orkustofnun 2024 annual curtailment ~0 TWh (load-following hydro+geothermal, reservoir-buffered)
Ember annual: —
IRENA annual: —
Other: —

Discrepancy analysis

No backfill and no TSO anchor. Region relies solely on the live snapshot; nothing to triangulate against.

Known limitations

No public hourly archive. Orkustofnun (Icelandic National Energy Authority, orkustofnun.is) publishes annual generation summaries but no hourly dispatch-down series — Landsvirkjun likewise does not surface real-time spill data. The loader emits a hydro-seasonal shape (HYDRO_SEASONAL_SHARES.iceland, weighted toward May–August for glacial-melt + snowmelt) scaled to a 5.3 TWh/yr anchor for combined hydro and geothermal load-following slack. T3-modelled, ±40% envelope. Iceland is hydro+geothermal dominant and grid-isolated (no interconnector); the "spill" semantic here is reservoir-bound seasonal storage limit at peak melt rather than wind-or-solar dispatch-down — distinct from every other T3 region in the dataset, and a useful methodological reminder that "curtailment" generalises beyond the wind-PV case in the Scientific Data submission framing.