Footprint-weighted tile approach for a spruce forest and a nearby patchy clearing using the ACASA model

dc.bibliographicCitation.firstPage2945
dc.bibliographicCitation.issue9
dc.bibliographicCitation.journalTitleBiogeosciences : BGeng
dc.bibliographicCitation.lastPage2960
dc.bibliographicCitation.volume15
dc.contributor.authorGatzsche, Kathrin
dc.contributor.authorBabel, Wolfgang
dc.contributor.authorFalge, Eva
dc.contributor.authorPyles, Rex David
dc.contributor.authorPaw U., Kyaw Tha
dc.contributor.authorRaabe, Armin
dc.contributor.authorFoken, Thomas
dc.date.accessioned2023-02-27T08:51:29Z
dc.date.available2023-02-27T08:51:29Z
dc.date.issued2018
dc.description.abstractThe ACASA (Advanced Canopy-Atmosphere-Soil Algorithm) model, with a higher-order closure for tall vegetation, has already been successfully tested and validated for homogeneous spruce forests. The aim of this paper is to test the model using a footprint-weighted tile approach for a clearing with a heterogeneous structure of the underlying surface. The comparison with flux data shows a good agreement with a footprint-aggregated tile approach of the model. However, the results of a comparison with a tile approach on the basis of the mean land use classification of the clearing is not significantly different. It is assumed that the footprint model is not accurate enough to separate small-scale heterogeneities. All measured fluxes are corrected by forcing the energy balance closure of the test data either by maintaining the measured Bowen ratio or by the attribution of the residual depending on the fractions of sensible and latent heat flux to the buoyancy flux. The comparison with the model, in which the energy balance is closed, shows that the buoyancy correction for Bowen ratios > 1.5 better fits the measured data. For lower Bowen ratios, the correction probably lies between the two methods, but the amount of available data was too small to make a conclusion. With an assumption of similarity between water and carbon dioxide fluxes, no correction of the net ecosystem exchange is necessary for Bowen ratios > 1.5.eng
dc.description.versionpublishedVersioneng
dc.identifier.urihttps://oa.tib.eu/renate/handle/123456789/11532
dc.identifier.urihttp://dx.doi.org/10.34657/10566
dc.language.isoeng
dc.publisherKatlenburg-Lindau [u.a.] : Copernicus
dc.relation.doihttps://doi.org/10.5194/bg-15-2945-2018
dc.relation.essn1726-4189
dc.rights.licenseCC BY 4.0 Unported
dc.rights.urihttps://creativecommons.org/licenses/by/4.0
dc.subject.ddc550
dc.subject.ddc570
dc.subject.otherBowen ratioeng
dc.subject.otherbuoyancyeng
dc.subject.othercarbon dioxideeng
dc.subject.otherclearcuttingeng
dc.subject.otherconiferous foresteng
dc.subject.otherenergy balanceeng
dc.subject.otherheterogeneityeng
dc.subject.otherland useeng
dc.subject.otherlatent heat fluxeng
dc.subject.othernet ecosystem exchangeeng
dc.subject.othervegetation dynamicseng
dc.subject.otherPiceaeng
dc.titleFootprint-weighted tile approach for a spruce forest and a nearby patchy clearing using the ACASA modeleng
dc.typeArticleeng
dc.typeTexteng
tib.accessRightsopenAccess
wgl.contributorTROPOS
wgl.subjectBiowissenschaften/Biologieger
wgl.subjectGeowissenschaftenger
wgl.typeZeitschriftenartikelger
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