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2022-04-26Zeitschriftenartikel DOI: 10.18452/24860
Critical Zone Response Times and Water Age Relationships Under Variable Catchment Wetness States: Insights Using a Tracer‐Aided Ecohydrological Model
dc.contributor.authorSmith, Aaron
dc.contributor.authorTetzlaff, Doerthe
dc.contributor.authorManeta, Marco
dc.contributor.authorSoulsby, Chris
dc.date.accessioned2022-06-28T13:17:17Z
dc.date.available2022-06-28T13:17:17Z
dc.date.issued2022-04-26none
dc.date.updated2022-06-14T21:41:19Z
dc.identifier.urihttp://edoc.hu-berlin.de/18452/25535
dc.description.abstractThe dynamic relationships between water flux and storage, together with the associated water ages and speed of hydrological responses (as proxies for velocity and celerity respectively) are fundamental to understanding how catchments react to hydroclimate perturbations, such as floods and droughts. Using results from a calibrated, tracer-aided ecohydrological model (EcH2O-iso) we analyzed the dynamics of storage-flux-age-response time (RT) interactions at scales that resolve the internal heterogeneity of these non-stationary relationships. EcH2O-iso has previously shown an adequate representation of ecohydrological flux partitioning and storage dynamics (celerity), and water ages (velocity) over 11-year at Demnitzer Millcreek catchment (DMC, 66 km2), a drought-sensitive, lowland catchment in Germany. The 11-year period had marked hydroclimatic contrasts facilitating the evaluation of flux-storage-age-RT dynamics under different wetness anomalies. Our results show that the spatio–temporal variability of soil moisture and ecohydrological partitioning dynamics reflect both land use (especially forest cover) and distinct soil units (i.e., brown earth vs. podzolic soils). Spatial differences in RTs of storage were driven by rapid soil evaporation and transpiration responses to rainfall, which revealed a divergence of transpiration ages from RTs. RTs of groundwater and streamflow were fast (days), but mediation by soil water storage dynamics caused marked separation from water ages (years-decades) of deeper flow paths. Analysis of RTs and ages revealed a degradation of process representation with coarsening model spatial resolution. This study uses novel analysis of the spatio-temporal interactions of flux-storage-age-RT from a model to understand the sensitivity and resilience of catchment functionality to hydroclimatic perturbations.eng
dc.description.sponsorshipFP7 Ideas: European Research Council (FP7 Ideas) http://dx.doi.org/10.13039/100011199
dc.description.sponsorshipLeverhulme Trust http://dx.doi.org/10.13039/501100000275
dc.language.isoengnone
dc.publisherHumboldt-Universität zu Berlin
dc.rights(CC BY 4.0) Attribution 4.0 Internationalger
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectecohydrological modellingeng
dc.subjectwater ageeng
dc.subjecthydrologic response timeseng
dc.subjectmodel scalingeng
dc.subject.ddc550 Geowissenschaftennone
dc.titleCritical Zone Response Times and Water Age Relationships Under Variable Catchment Wetness States: Insights Using a Tracer‐Aided Ecohydrological Modelnone
dc.typearticle
dc.identifier.urnurn:nbn:de:kobv:11-110-18452/25535-2
dc.identifier.doihttp://dx.doi.org/10.18452/24860
dc.type.versionpublishedVersionnone
local.edoc.pages21none
local.edoc.type-nameZeitschriftenartikel
local.edoc.container-typeperiodical
local.edoc.container-type-nameZeitschrift
dc.description.versionPeer Reviewednone
dc.identifier.eissn1944-7973
dcterms.bibliographicCitation.doi10.1029/2021WR030584none
dcterms.bibliographicCitation.journaltitleWater resources researchnone
dcterms.bibliographicCitation.volume58none
dcterms.bibliographicCitation.issue4none
dcterms.bibliographicCitation.articlenumbere2021WR030584none
dcterms.bibliographicCitation.originalpublishernameWileynone
dcterms.bibliographicCitation.originalpublisherplaceNew Yorknone
bua.departmentMathematisch-Naturwissenschaftliche Fakultätnone

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