An expert system model for mapping tropical wetlands and peatlands reveals South America as the largest contributor

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cg.contributor.affiliationCenter for International Forestry Researchen
cg.contributor.affiliationKarttur ABen
cg.contributor.affiliationWageningen University & Researchen
cg.contributor.affiliationInternational Center for Tropical Agricultureen
cg.contributor.affiliationColumbia Universityen
cg.contributor.affiliationKarlsruhe Institute of Technologyen
cg.contributor.affiliationBogor Agricultural Universityen
cg.coverage.countryBrazil
cg.coverage.countryIndonesia
cg.coverage.iso3166-alpha2BR
cg.coverage.iso3166-alpha2ID
cg.coverage.regionSouth America
cg.coverage.regionSouth-eastern Asia
cg.creator.identifierRosa Maria Roman-Cuesta: 0000-0002-6945-8402
cg.creator.identifierLouis Verchot: 0000-0001-8309-6754
cg.identifier.doihttps://doi.org/10.1111/gcb.13689en
cg.isijournalISI Journalen
cg.issn1354-1013en
cg.issue9en
cg.journalGlobal Change Biologyen
cg.reviewStatusPeer Reviewen
cg.subject.ciatCLIMATE CHANGE ADAPTATIONen
cg.subject.ciatLAND USEen
cg.volume23en
dc.contributor.authorGumbricht, Thomasen
dc.contributor.authorRomán Cuesta, Rosa Maríaen
dc.contributor.authorVerchot, Louis V.en
dc.contributor.authorHerold, Martinen
dc.contributor.authorWittmann, Florianen
dc.contributor.authorHouseholder, Ethanen
dc.contributor.authorHerold, Nadineen
dc.contributor.authorMurdiyarso, Danielen
dc.date.accessioned2017-06-08T21:08:09Zen
dc.date.available2017-06-08T21:08:09Zen
dc.identifier.urihttps://hdl.handle.net/10568/81497
dc.titleAn expert system model for mapping tropical wetlands and peatlands reveals South America as the largest contributoren
dcterms.abstractWetlands are important providers of ecosystem services and key regulators of climate change. They positively contribute to global warming through their greenhouse gas emissions, and negatively through the accumulation of organic material in histosols, particularly in peatlands. Our understanding of wetlands’ services is currently constrained by limited knowledge on their distribution, extent, volume, interannual flood variability and disturbance levels. We present an expert system approach to estimate wetland and peatland areas, depths and volumes, which relies on three biophysical indices related to wetland and peat formation: (1) long-term water supply exceeding atmospheric water demand; (2) annually or seasonally water-logged soils; and (3) a geomorphological position where water is supplied and retained. Tropical and subtropical wetlands estimates reach 4.7 million km2 (Mkm2). In line with current understanding, the American continent is the major contributor (45%), and Brazil, with its Amazonian interfluvial region, contains the largest tropical wetland area (800,720 km2). Our model suggests, however, unprecedented extents and volumes of peatland in the tropics (1.7 Mkm2 and 7,268 (6,076–7,368) km3), which more than threefold current estimates. Unlike current understanding, our estimates suggest that South America and not Asia contributes the most to tropical peatland area and volume (ca. 44% for both) partly related to some yet unaccounted extended deep deposits but mainly to extended but shallow peat in the Amazon Basin. Brazil leads the peatland area and volume contribution. Asia hosts 38% of both tropical peat area and volume with Indonesia as the main regional contributor and still the holder of the deepest and most extended peat areas in the tropics. Africa hosts more peat than previously reported but climatic and topographic contexts leave it as the least peat-forming continent. Our results suggest large biases in our current understanding of the distribution, area and volumes of tropical peat and their continental contributions.en
dcterms.accessRightsOpen Access
dcterms.available2017-05-09
dcterms.bibliographicCitationGumbricht, Thomas; Roman-Cuesta, Rosa Maria; Verchot, Louis; Herold, Martin; Wittmann, Florian; Householder, Ethan; Herold, Nadine; Murdiyarso, Daniel. 2017. An expert system model for mapping tropical wetlands and peatlands reveals South America as the largest contributor . Global Change Biology 23(9): 3581-3599. .en
dcterms.extentp. 3581-3599en
dcterms.issued2017-09
dcterms.languageen
dcterms.licenseCC-BY-4.0
dcterms.publisherWileyen
dcterms.subjectclimate changeen
dcterms.subjectland useen
dcterms.subjectpeatlandsen
dcterms.subjecttropical zonesen
dcterms.subjectwetlandsen
dcterms.subjectcambio climáticoen
dcterms.subjectutilización de la tierraen
dcterms.subjectturberasen
dcterms.subjectzona tropicalen
dcterms.subjecttierras húmedasen
dcterms.typeJournal Article

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