Show simple item record

dc.contributor.authorHeegaard, Einareng
dc.contributor.authorBirks, Harry John Betteleyeng
dc.contributor.authorTelford, Richard J.eng
dc.date.accessioned2007-12-11T10:27:35Z
dc.date.available2007-12-11T10:27:35Z
dc.date.issued2005eng
dc.identifier.citationThe Holocene 2005 15(4): 612-618en
dc.identifier.issn0959-6836eng
dc.identifier.urihttp://hdl.handle.net/1956/2489
dc.description.abstractWe present a procedure for estimating age-depth relationships in stratigraphical sequences by means of a generalized mixed-effect regression using an ancillary function for the partitioning of the fixed effect and the random effect corresponding to the degree of representativity of the individual calibrated dates for a particular section of the sedimentary sequence. The procedure uses mid-point estimates of the calibrated ages in combination with the central distributional range as the basis for estimating the fixed relationship between age and depth. Further, it combines the variability of the calibrated age at individual layers (within-object variance) with estimation of the variability of the calibrated age distribution as a whole between the layers standardized by the fixed effect (between-object variance). These components of random variability can be considered independent, and hence the uncertainty of the estimated fixed relationship between age and depth can be estimated by combining the two random variables. The procedure follows the logic of mixed-effects models, but with prior information about the expected variance within each dated object.en
dc.language.isoengeng
dc.publisherSAGEeng
dc.subjectSediment sequenceseng
dc.subjectAge-depth relationshipseng
dc.subjectGAMeng
dc.subjectMixed effectseng
dc.subjectCalibrated ageseng
dc.titleRelationships between calibrated ages and depth in stratigraphical sequences: an estimation procedure by mixed-effect regressioneng
dc.typePeer reviewedeng
dc.typeJournal articleeng
dc.subject.nsiVDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480nob
bora.peerreviewedPeer reviewedeng
bibo.doihttp://dx.doi.org/10.1191/0959683605hl836rreng
dc.identifier.doihttp://dx.doi.org/10.1191/0959683605hl836rr


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record