Global Age Mapping Integration (GAMI)

Cite as:

Besnard, Simon; Santoro, Maurizio; Herold, Martin; Cartus, Oliver; Gütter, Jonas; Heinrich, Viola H.A.; Herault, Bruno; Kassi, Justin; Koirala, Sujan; N'Guessan, Anny; Neigh, Christopher; Nelson, Jacob A.; Poulter, Benjamin; Weber, Ulrich; Zhang, Tao; Carvalhais, Nuno (2024): Global Age Mapping Integration (GAMI). V. 2.1. GFZ Data Services. https://doi.org/10.5880/GFZ.1.4.2023.006

Status

I N R E V I E W : Besnard, Simon; Santoro, Maurizio; Herold, Martin; Cartus, Oliver; Gütter, Jonas; Heinrich, Viola H.A.; Herault, Bruno; Kassi, Justin; Koirala, Sujan; N'Guessan, Anny; Neigh, Christopher; Nelson, Jacob A.; Poulter, Benjamin; Weber, Ulrich; Zhang, Tao; Carvalhais, Nuno (2024): Global Age Mapping Integration (GAMI). V. 2.1. GFZ Data Services. https://doi.org/10.5880/GFZ.1.4.2023.006

Abstract

GAMI is an updated dataset providing global forest age distributions for 2010 and 2020 with 100-meter resolution, improving upon the MPI-BGC forest age product. Utilizing machine learning, specifically XGBoost, the estimates are based on over 40,000 forest inventory plots, biomass/height data, remote sensing, and climate data. The dataset incorporates Landsat-based disturbance history and uses multiple XGBoost models with varied hyperparameters to address aleatoric and epistemic uncertainties. Twenty realizations of biomass data with controlled perturbations simulate natural variability, offering robust statistical measures and confidence intervals. Additionally, GAMI provides age class fraction products at different spatial resolutions for custom analyses.

The full description of the data and the updates to version 1.0 (Besnard, 2021, https://doi.org/10.17871/ForestAgeBGI.2021) is provided in the associated data description file.

Version history:

28 August 2024: Publication of Version 2.0
7 January 2025: publication of Version 2.1. The files of Version 2.0 are available in the "previous-versions" in the data download folder. The GAMI version 2.1 use the ESA-CCI biomass maps version 5 during the model forward runs.

Authors

Besnard, Simon;GFZ German Research Centre of Geosciences, Potsdam, Germany
Santoro, Maurizio;Gamma Remote Sensing, Bern, Switzerland
Herold, Martin;GFZ German Research Centre of Geosciences, Potsdam, Germany
Cartus, Oliver;Gamma Remote Sensing, Bern, Switzerland
Gütter, Jonas
Heinrich, Viola H.A.;GFZ German Research Centre of Geosciences, Potsdam, Germany
Herault, Bruno;Research Unit Forests and Societies, CIRAD, University of Montpellier, Montpellier, France
Kassi, Justin;Laboratoire de Botanique, UFR Biosciences, Université Félix Houphouët-Boigny, Abidjan, Côte d'Ivoire
Koirala, Sujan;Department of Biogeochemical Integration, Max Planck Institute for Biogeochemistry, Jena, Germany
N'Guessan, Anny;Laboratoire de Botanique, UFR Biosciences, Université Félix Houphouët-Boigny, Abidjan, Côte d'Ivoire
Neigh, Christopher;Biospheric Sciences Laboratory, NASA Goddard Space Flight Center, Greenbelt, Maryland, USA
Nelson, Jacob A.;Department of Biogeochemical Integration, Max Planck Institute for Biogeochemistry, Jena, Germany
Poulter, Benjamin;Biospheric Sciences Laboratory, NASA Goddard Space Flight Center, Greenbelt, Maryland, USA
Weber, Ulrich;Department of Biogeochemical Integration, Max Planck Institute for Biogeochemistry, Jena, Germany
Zhang, Tao;Department of Biology, University of Florida, Gainesville, Florida, USA
Carvalhais, Nuno;Department of Biogeochemical Integration, Max Planck Institute for Biogeochemistry, Jena, Germany

Contact

Besnard, Simon (Researcher); Helmholtz GFZ German Research Centre of Geosciences, Section 1.4 Remote Sensing and Geoinformatics, Telegrafenberg, Potsdam, Germany;
Carvalhais, Nuno (Group leader); Department of Biogeochemical Integration, Max Planck Institute for Biogeochemistry, Jena, Germany;

Funders

Europen Space Agency: BIOMASCAT
European Union: VERIFY (776810)
European Union: ForestNavigator (101056875)
European Commission

Keywords

forest age, carbon cycle, disturbance history, machine learning

GCMD Science Keywords

EARTH SCIENCE > BIOSPHERE > TERRESTRIAL ECOSYSTEMS > FORESTS
Maps/Charts/Photographs

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        RS_Identifier
        code
        CharacterString: 10.1126/science.1244693
        codeSpace
        CharacterString: DOI
        associationType
        DS_AssociationTypeCode (codeList=http://datacite.org/schema/kernel-4 codeListValue=Cites): Cites
      - aggregationInfo
        MD_AggregateInformation
        aggregateDataSetIdentifier
        RS_Identifier
        code
        CharacterString: 10.1016/j.rse.2020.112165
        codeSpace
        CharacterString: DOI
        associationType
        DS_AssociationTypeCode (codeList=http://datacite.org/schema/kernel-4 codeListValue=Cites): Cites
      - language
        CharacterString: eng
      - characterSet
        MD_CharacterSetCode (codeListValue=utf8 codeList=http://www.isotc211.org/2005/resources/codeList.xml#MD_CharacterSetCode):
      - topicCategory
        MD_TopicCategoryCode: geoscientificInformation
      - extent
        EX_Extent
        description
        CharacterString: Global and for the years 2010 and 2020
        geographicElement
        EX_GeographicBoundingBox
        westBoundLongitude
        Decimal: -180
        eastBoundLongitude
        Decimal: 180
        southBoundLatitude
        Decimal: -90
        northBoundLatitude
        Decimal: 90
        temporalElement
        EX_TemporalExtent
        extent
        TimePeriod (xsi:type=gml:TimePeriodType gml:id=T677e4b271935e)
        beginPosition: 2010-01-01
        endPosition: 2020-01-01
  - distributionInfo
    - MD_Distribution
      - transferOptions
        MD_DigitalTransferOptions
        onLine
        CI_OnlineResource
        linkage
        URL: http://doi.org/10.5880/GFZ.1.4.2023.006
        protocol
        CharacterString: WWW:LINK-1.0-http--link
        name
        CharacterString: Data Access - DOI
        description
        CharacterString: Data Access - DOI
        function
        CI_OnLineFunctionCode (codeList=http://www.isotc211.org/2005/resources/Codelist/gmxCodelists.xml#CI_OnLineFunctionCode codeListValue=http://www.isotc211.org/2005/resources/Codelist/gmxCodelists.xml#CI_OnLineFunctionCode_information): information
  - dataQualityInfo
    - DQ_DataQuality
      - scope
        DQ_Scope
        level
        MD_ScopeCode (codeListValue=dataset codeList=http://www.isotc211.org/2005/resources/codeList.xml#MD_ScopeCode):
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