AQUA
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TERRA
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type: Concept
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EARTH SCIENCE>AGRICULTURE>SOILS>PERMAFROST
type: Concept
in scheme: https://gcmd.earthdata.nasa.gov/kms/concepts/concept_scheme/sciencekeywords

Sentinel-2
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in scheme: https://gcmd.earthdata.nasa.gov/kms/concepts/concept_scheme/platforms

ESA Permafrost Climate Change Initiative (Permafrost_cci): Permafrost active layer thickness for the Northern Hemisphere, v5.0
type: Dataset
access rights: Public data: access to these data is available to both registered and non-registered users. http://inspire.ec.europa.eu/metadata-codelist/LimitationsOnPublicAccess/noLimitations
description: This dataset contains 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 second version of their Climate Research Data Package (CRDP v4). It is derived from a thermal model driven and constrained by satellite data. Grid products of CDRP v4 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 30Â°N) for the period 2003-2023 based on MODIS Land Surface temperature merged with downscaled ERA5 reanalysis near-surface air temperature data.e.g. ESACCI-PERMAFROST-L4-ALT-MODISLST_CRYOGRID-AREA4_PP-****-fv05.0.ncCase B: It covers the Northern Hemisphere (north of 30Â°N) 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 2003-2023 using a pixel-specific statistics for each day of the year.e.g. ESACCI-PERMAFROST-L4-ALT-ERA5_MODISLST_BIASCORRECTED-AREA4_PP-****-fv05.0.nc
language: EN
license: LicenseDocument
  label: Under the following licence https://artefacts.ceda.ac.uk/licences/specific_licences/esacci_permafrost_terms_and_conditions.pdf, appropriate use of these data may fall under any use. This message is intended as guidance, always read the full licence. When using these data you must cite them correctly using the citation given on the CEDA Data Catalogue record.
modified: 1997-01-01T00:00:00Z
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  end date: 2023-12-31T23:59:59Z
  start date: 1997-01-01T00:00:00Z
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access URL: http://data.ceda.ac.uk/neodc/esacci/permafrost/data/active_layer_thickness/L4/area4/pp/v05.0/northern_hemisphere/
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    postal-code: OX11 0QX
    street-address: RAL Space, STFC Rutherford Appleton Laboratory, Harwell Campus
  has name: CEDA
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keyword: orthoimagery
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was generated by: Activity
  ended at time: 2023-12-31T23:59:59Z
  started at time: 1997-01-01T00:00:00Z
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  ended at time: 2023-12-31T23:59:59Z
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  started at time: 1997-01-01T00:00:00Z

CatalogRecord
conforms to: https://joinup.ec.europa.eu/release/geodcat-ap/20
modified: 2026-08-05T00:51:48Z

Aqua
type: Concept
in scheme: https://gcmd.earthdata.nasa.gov/kms/concepts/concept_scheme/platforms

EARTH SCIENCE>AGRICULTURE>SOILS
type: Concept
in scheme: https://gcmd.earthdata.nasa.gov/kms/concepts/concept_scheme/sciencekeywords

PROBA-V
type: Entity
type: Concept
in scheme: https://earth.esa.int/concepts/concept_scheme/platforms

Sentinel-1A
type: Concept
in scheme: https://gcmd.earthdata.nasa.gov/kms/concepts/concept_scheme/platforms

Envisat
type: Entity
type: Concept
in scheme: https://earth.esa.int/concepts/concept_scheme/platforms

ENVISAT
type: Concept
in scheme: https://gcmd.earthdata.nasa.gov/kms/concepts/concept_scheme/platforms

C-SAR
type: Concept
in scheme: https://gcmd.earthdata.nasa.gov/kms/concepts/concept_scheme/instruments

https://fedeo.ceos.org/collections/series/items/a6fbedd8ee5b472c8e84e55f746c1704
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EARTH SCIENCE>LAND SURFACE>FROZEN GROUND>PERMAFROST
type: Concept
in scheme: https://gcmd.earthdata.nasa.gov/kms/concepts/concept_scheme/sciencekeywords

Terra
type: Concept
in scheme: https://gcmd.earthdata.nasa.gov/kms/concepts/concept_scheme/platforms

Algorithm Theoretical Basis Document
type: Document
description: No further details.

Technical documentation for the Permafrost CCI project
type: Document
description: No further details.

Sentinel-2 MSI
type: Concept
in scheme: https://gcmd.earthdata.nasa.gov/kms/concepts/concept_scheme/instruments

Product User Guide (CRDPv4)
type: Document
description: No further details.

C-SAR
type: Entity
type: Concept
in scheme: https://earth.esa.int/concepts/concept_scheme/instruments

MSI
type: Entity
type: Concept
in scheme: https://earth.esa.int/concepts/concept_scheme/instruments

ESA CCI Permafrost project website
type: Document
description: No further details.

Sentinel-2
type: Entity
type: Concept
in scheme: https://earth.esa.int/concepts/concept_scheme/platforms

Sentinel-1A
type: Entity
type: Concept
in scheme: https://earth.esa.int/concepts/concept_scheme/platforms

MODIS
type: Concept
in scheme: https://gcmd.earthdata.nasa.gov/kms/concepts/concept_scheme/instruments

MERIS
type: Concept
in scheme: https://gcmd.earthdata.nasa.gov/kms/concepts/concept_scheme/instruments

MODIS
type: Entity
type: Concept
in scheme: https://earth.esa.int/concepts/concept_scheme/instruments

EARTH SCIENCE>BIOSPHERE>VEGETATION
type: Concept
in scheme: https://gcmd.earthdata.nasa.gov/kms/concepts/concept_scheme/sciencekeywords

CEDA Data Catalogue Page
type: Document
description: Detail and access information for the resource

MERIS
type: Entity
type: Concept
in scheme: https://earth.esa.int/concepts/concept_scheme/instruments