EC-M-1.1 v0.9.1 Coming

Soil Carbon Stock SOC

Estimated soil organic carbon stock to 30 cm depth, in tC/ha, monthly.

Built on SoilGrids 2.0 with parcel-level downscaling using terrain, land cover, and the EC-M-1.1 functional dimension. Returns mean stock, uncertainty interval, and the sample density behind the estimate.

Twelve-month sample series

A representative parcel under EC-M-1.1, July 2025 through June 2026. The line is the published value at each monthly vintage; the band is the 95% confidence interval. Past vintages are immutable — this same chart, queried in 2040, returns the same values.

Soil Carbon Stock (SOC) — sample monthly series

parcel us-vt-orange-a3f2 · methodology EC-M-1.1 · v0.9.1 · illustrative, not for citation

Sample · illustrative

Sample observation

A complete response object for this signal at a sample location and as-of date. Every field below appears on every observation; signal-specific structure lives under components.

200 OK · application/json GET /v1/signals/soil-carbon-stock

{
  "signal_id": "soil-carbon-stock",
  "version": "0.9.1",
  "methodology_version": "EC-M-1.1",
  "as_of": "2026-04-30",
  "vintage_pinned": true,
  "value": 84.3,
  "unit": "tC/ha (0–30cm)",
  "stdev": 6.1,
  "sample_density": "medium",
  "lineage": {
    "inputs_count": 7,
    "computation_graph": "https://api.earth-signals.com/v1/signals/soil-carbon-stock/lineage/0xa3f2..."
  }
}

How to query

The signal is queried at the canonical /v1/signals/{id} endpoint. Required parameters are a location and an as-of date. The same query replayed in 2040 returns the same value.

curl https://api.earth-signals.com/v1/signals/soil-carbon-stock \
  -H "Authorization: Bearer es_preview_..." \
  -d "lat=44.4654" \
  -d "lng=-72.6874" \
  -d "as_of=2026-04-30"

Endpoint and tokens shown for spec illustration. The Earth Signals API is in private beta with named design partners; the underlying Earth API and Calculator API are live.

The full parameter table — point query, parcel id, polygon aggregation, methodology pinning — is in the API reference.

Audiences that lean on this signal

Corporate disclosure & risk Sustainability, finance, and risk teams at large corporates.

Citation

Landseed PBC. Soil Carbon Stock (SOC), version 0.9.1, methodology EC-M-1.1. Earth Signals canonical signal layer. DOI forthcoming.

Cite the catalog id, the signal version, the methodology version, and the as-of date. Together these define a reproducible observation forever — independent of methodology revisions.