{
  "extent": {
    "spatial": {"bbox": [[
      -180,
      25,
      180,
      85
    ]]},
    "temporal": {"interval": [[
      "1997-01-01T00:00:00Z",
      "2021-12-31T23:59:59Z"
    ]]}
  },
  "stac_version": "1.0.0",
  "keywords": [
    "DIF10",
    "Permafrost",
    "CCI",
    "Active layer thickness",
    "orthoimagery",
    "EARTH SCIENCE>AGRICULTURE>SOILS>PERMAFROST",
    "Aqua",
    "ENVISAT",
    "Terra",
    "NOAA-16",
    "NOAA-15",
    "NOAA-17",
    "ASAR",
    "MODIS",
    "MERIS",
    "AVHRR-3",
    "Envisat",
    "SAR-X",
    "MODIS_TERRA",
    "SPOT",
    "PROBA-V",
    "AQUA",
    "TERRA"
  ],
  "description": "This dataset contains v4.0 permafrost active layer thickness data produced as part of the European Space Agency's (ESA) Climate Change Initiative (CCI) Permafrost project. It forms part of the third version of their Climate Research Data Package (CRDP v3). It is derived from a thermal model driven and constrained by satellite data. CRDPv3 covers the years from 1997 to 2021. Grid products of CDRP v3 are released in annual files, covering the start  to the end of the Julian year. The maximum depth of seasonal thaw is provided, which corresponds to the active layer thickness.  Case A: It covers the Northern Hemisphere (north of 30°) for the period 2003-2021 based on MODIS Land Surface temperature merged with downscaled ERA5 reanalysis near-surface air temperature data. Case B: It covers the Northern Hemisphere (north of 30°) for the period 1997-2002 based on downscaled ERA5 reanalysis near-surface air temperature data which are bias-corrected with the Case A product for the overlap period 2003-2021 using a pixel-specific statistics for each day of the year.",
  "type": "Collection",
  "title": "ESA Permafrost Climate Change Initiative (Permafrost_cci): Permafrost active layer thickness for the Northern Hemisphere, v4.0",
  "license": "various",
  "assets": {
    "enclosure": {
      "roles": ["data"],
      "href": "http://data.ceda.ac.uk/neodc/esacci/permafrost/data/active_layer_thickness/L4/area4/pp/v04.0",
      "type": "application/x-binary",
      "title": "DOWNLOAD - Download Data"
    },
    "metadata_ogc_17_069r3": {
      "roles": ["metadata"],
      "href": "https://fedeo.ceos.org/collections/d34330ce3f604e368c06d76de1987ce5?parentIdentifier=EOP:STFC:CEDA-CCI",
      "title": "OGC 17-069r3 metadata",
      "type": "application/geo+json;profile=\"http://www.opengis.net/spec/ogcapi-features-1/1.0\""
    },
    "metadata_iso_19139": {
      "roles": ["metadata"],
      "href": "https://fedeo.ceos.org/collections/d34330ce3f604e368c06d76de1987ce5?parentIdentifier=EOP:STFC:CEDA-CCI&httpAccept=application/vnd.iso.19139%2Bxml",
      "title": "ISO 19139 metadata",
      "type": "application/vnd.iso.19139+xml"
    },
    "metadata_iso_19139_2": {
      "roles": ["metadata"],
      "href": "https://fedeo.ceos.org/collections/d34330ce3f604e368c06d76de1987ce5?parentIdentifier=EOP:STFC:CEDA-CCI&httpAccept=application/vnd.iso.19139-2%2Bxml",
      "title": "ISO 19139-2 metadata",
      "type": "application/vnd.iso.19139-2+xml"
    },
    "metadata_dif_10": {
      "roles": ["metadata"],
      "href": "https://fedeo.ceos.org/collections/d34330ce3f604e368c06d76de1987ce5?parentIdentifier=EOP:STFC:CEDA-CCI&httpAccept=application/dif10%2Bxml",
      "title": "DIF-10 metadata",
      "type": "application/dif10+xml"
    },
    "metadata_ogc_17_084r1": {
      "roles": ["metadata"],
      "href": "https://fedeo.ceos.org/collections/d34330ce3f604e368c06d76de1987ce5?parentIdentifier=EOP:STFC:CEDA-CCI&mode=owc",
      "title": "OGC 17-084r1 metadata",
      "type": "application/geo+json;profile=\"http://www.opengis.net/spec/eoc-geojson/1.0\""
    },
    "metadata_html": {
      "roles": ["metadata"],
      "href": "https://fedeo.ceos.org/collections/d34330ce3f604e368c06d76de1987ce5?parentIdentifier=EOP:STFC:CEDA-CCI&httpAccept=text/html",
      "title": "HTML",
      "type": "text/html"
    },
    "metadata_iso_191115_3": {
      "roles": ["metadata"],
      "href": "https://fedeo.ceos.org/collections/d34330ce3f604e368c06d76de1987ce5?parentIdentifier=EOP:STFC:CEDA-CCI&httpAccept=application/vnd.iso.19115-3%2Bxml",
      "title": "ISO 19115-3 metadata",
      "type": "application/vnd.iso.19115-3+xml"
    }
  },
  "links": [
    {
      "rel": "self",
      "href": "https://fedeo.ceos.org/collections/series/items/d34330ce3f604e368c06d76de1987ce5?httpAccept=application/json",
      "type": "application/json"
    },
    {
      "rel": "parent",
      "href": "https://fedeo.ceos.org/collections/series",
      "title": "EO Series",
      "type": "application/json"
    },
    {
      "rel": "collection",
      "href": "https://fedeo.ceos.org/collections/series",
      "title": "EO Series",
      "type": "application/json"
    },
    {
      "rel": "license",
      "href": "https://artefacts.ceda.ac.uk/licences/specific_licences/esacci_permafrost_terms_and_conditions.pdf",
      "type": "application/pdf",
      "title": "Other Constraints"
    },
    {
      "rel": "search",
      "href": "https://fedeo.ceos.org/collections/series/items/d34330ce3f604e368c06d76de1987ce5/api",
      "type": "application/opensearchdescription+xml",
      "title": "OpenSearch Description Document"
    },
    {
      "rel": "describedby",
      "href": "https://catalogue.ceda.ac.uk/uuid/d34330ce3f604e368c06d76de1987ce5",
      "title": "CEDA Data Catalogue Page - Detail and access information for the resource"
    },
    {
      "rel": "describedby",
      "href": "https://climate.esa.int/projects/permafrost/",
      "title": "ESA CCI Permafrost project website - No further details."
    },
    {
      "rel": "describedby",
      "href": "https://climate.esa.int/en/projects/permafrost/key-documents/",
      "title": "Technical documentation for the Permafrost CCI project - No further details."
    },
    {
      "rel": "describedby",
      "href": "https://dap.ceda.ac.uk/neodc/esacci/permafrost/docs/v4.0/CCI_PERMA_PUG_v4.1.pdf",
      "type": "application/pdf",
      "title": "Product User Guide - No further details."
    },
    {
      "rel": "describedby",
      "href": "https://climate.esa.int/media/documents/CCI_PERMA_D2.2_ATBD_v4.0.pdf",
      "type": "application/pdf",
      "title": "Algorithm Theoretical Basis Document - No further details."
    },
    {
      "rel": "alternate",
      "href": "https://fedeo.ceos.org/collections/d34330ce3f604e368c06d76de1987ce5?parentIdentifier=EOP:STFC:CEDA-CCI&httpAccept=application/atom%2Bxml",
      "type": "application/atom+xml",
      "title": "Atom format"
    },
    {
      "rel": "alternate",
      "href": "https://fedeo.ceos.org/collections/d34330ce3f604e368c06d76de1987ce5?parentIdentifier=EOP:STFC:CEDA-CCI&httpAccept=application/xml",
      "type": "application/xml",
      "title": "Dublin Core metadata"
    },
    {
      "rel": "alternate",
      "href": "https://fedeo.ceos.org/collections/d34330ce3f604e368c06d76de1987ce5?parentIdentifier=EOP:STFC:CEDA-CCI&httpAccept=application/ld%2Bjson",
      "type": "application/ld+json",
      "title": "JSON-LD metadata"
    },
    {
      "rel": "alternate",
      "href": "https://fedeo.ceos.org/collections/d34330ce3f604e368c06d76de1987ce5?parentIdentifier=EOP:STFC:CEDA-CCI&httpAccept=application/ld%2Bjson;profile=https://schema.org",
      "type": "application/ld+json;profile=\"https://schema.org\"",
      "title": "JSON-LD (schema.org) metadata"
    },
    {
      "rel": "alternate",
      "href": "https://fedeo.ceos.org/collections/d34330ce3f604e368c06d76de1987ce5?parentIdentifier=EOP:STFC:CEDA-CCI&httpAccept=application/ld%2Bjson;profile=http://data.europa.eu/930/",
      "type": "application/ld+json;profile=\"http://data.europa.eu/930/\"",
      "title": "JSON-LD (GeoDCAT-AP) metadata"
    },
    {
      "rel": "alternate",
      "href": "https://fedeo.ceos.org/collections/d34330ce3f604e368c06d76de1987ce5?parentIdentifier=EOP:STFC:CEDA-CCI&httpAccept=application/rdf%2Bxml",
      "type": "application/rdf+xml",
      "title": "RDF/XML metadata"
    },
    {
      "rel": "alternate",
      "href": "https://fedeo.ceos.org/collections/d34330ce3f604e368c06d76de1987ce5?parentIdentifier=EOP:STFC:CEDA-CCI&httpAccept=application/rdf%2Bxml;profile=https://schema.org",
      "type": "application/rdf+xml;profile=\"https://schema.org\"",
      "title": "RDF/XML (schema.org) metadata"
    },
    {
      "rel": "alternate",
      "href": "https://fedeo.ceos.org/collections/d34330ce3f604e368c06d76de1987ce5?parentIdentifier=EOP:STFC:CEDA-CCI&httpAccept=application/rdf%2Bxml;profile=http://data.europa.eu/930/",
      "type": "application/rdf+xml;profile=\"http://data.europa.eu/930/\"",
      "title": "RDF/XML (GeoDCAT-AP) metadata"
    },
    {
      "rel": "alternate",
      "href": "https://fedeo.ceos.org/collections/d34330ce3f604e368c06d76de1987ce5?parentIdentifier=EOP:STFC:CEDA-CCI&httpAccept=text/turtle",
      "type": "text/turtle",
      "title": "Turtle metadata"
    },
    {
      "rel": "alternate",
      "href": "https://fedeo.ceos.org/collections/d34330ce3f604e368c06d76de1987ce5?parentIdentifier=EOP:STFC:CEDA-CCI&httpAccept=text/turtle;profile=https://schema.org",
      "type": "text/turtle;profile=\"https://schema.org\"",
      "title": "Turtle (schema.org) metadata"
    },
    {
      "rel": "alternate",
      "href": "https://fedeo.ceos.org/collections/d34330ce3f604e368c06d76de1987ce5?parentIdentifier=EOP:STFC:CEDA-CCI&httpAccept=text/turtle;profile=http://data.europa.eu/930/",
      "type": "text/turtle;profile=\"http://data.europa.eu/930/\"",
      "title": "Turtle (GeoDCAT-AP) metadata"
    },
    {
      "rel": "related",
      "href": "https://fedeo.ceos.org/series/eo:organisationName/CEDA",
      "title": "More collections for CEDA"
    },
    {
      "rel": "related",
      "href": "https://fedeo.ceos.org/series/eo:platform/AQUA",
      "title": "More collections for AQUA platform"
    },
    {
      "rel": "related",
      "href": "https://fedeo.ceos.org/series/eo:platform/Envisat",
      "title": "More collections for Envisat platform"
    },
    {
      "rel": "related",
      "href": "https://fedeo.ceos.org/series/eo:platform/TERRA",
      "title": "More collections for TERRA platform"
    },
    {
      "rel": "related",
      "href": "https://fedeo.ceos.org/series/eo:platform/NOAA-16",
      "title": "More collections for NOAA-16 platform"
    },
    {
      "rel": "related",
      "href": "https://fedeo.ceos.org/series/eo:platform/NOAA-15",
      "title": "More collections for NOAA-15 platform"
    },
    {
      "rel": "related",
      "href": "https://fedeo.ceos.org/series/eo:platform/NOAA-17",
      "title": "More collections for NOAA-17 platform"
    },
    {
      "rel": "related",
      "href": "https://fedeo.ceos.org/series/eo:platform/PROBA-V",
      "title": "More collections for PROBA-V platform"
    },
    {
      "rel": "related",
      "href": "https://fedeo.ceos.org/concepts/instruments/003ed1d0-9f6c-59cb-a427-1fa4c4a92107",
      "title": "More collections for MERIS instrument"
    },
    {
      "rel": "related",
      "href": "https://fedeo.ceos.org/concepts/instruments/450624e5-a0b1-5f27-ac6b-74a1aea8cb9e",
      "title": "More collections for AVHRR-3 instrument"
    },
    {
      "rel": "related",
      "href": "https://fedeo.ceos.org/concepts/instruments/ada8f84c-48ef-50a6-b2ba-635a1bdb7d14",
      "title": "More collections for MODIS instrument"
    }
  ],
  "id": "d34330ce3f604e368c06d76de1987ce5",
  "updated": "2026-04-09T01:05:50Z",
  "providers": [
    {
      "roles": ["producer"],
      "name": "CEDA"
    },
    {
      "roles": ["host"],
      "name": "FedEO",
      "url": "https://fedeo.ceos.org/readme.html"
    }
  ],
  "summaries": {
    "instruments": [
      "MODIS",
      "MERIS",
      "MODIS",
      "AVHRR-3",
      "AVHRR-3",
      "AVHRR-3"
    ],
    "platform": [
      "AQUA",
      "Envisat",
      "TERRA",
      "NOAA-16",
      "NOAA-15",
      "NOAA-17",
      "PROBA-V"
    ]
  }
}