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dc.contributor.authorNilsen, Tine
dc.contributor.authorTalento, Stefanie
dc.contributor.authorWerner, Johannes P
dc.date.accessioned2022-03-31T06:43:14Z
dc.date.available2022-03-31T06:43:14Z
dc.date.issued2021-07-06
dc.description.abstractThis study presents pseudo-proxy experiments to quantify the reconstruction skill of two climate field reconstruction methodologies for a marine proxy network subject to age uncertainties. The BARCAST methodology (Bayesian Algorithm for Reconstructing Climate Anomalies in Space and Time) is tested for sea surface temperature (SST) reconstruction for the first time over the northern North Atlantic region, and compared with a classic analogue reconstruction methodology. The reconstruction experiments are performed at annual and decadal resolution. We implement chronological uncertainties inherent to marine proxies as a novelty, using a simulated age-model ensemble covering the past millennium. Our experiments comprise different scenarios for the input data network, with the noise levels added to the target variable extending from ideal to realistic. Results show that both methodologies are able to reconstruct the Summer mean SST skillfully when the proxy network is considered absolutely dated, but the skill of the analogue method is superior to BARCAST. Only the analogue method provides skillful correlations with the true target variable in the case of a realistic noisy and age-uncertain proxy network. The spatiotemporal properties of the input target data are partly contrasting with the BARCAST model formulations, resulting in an inferior reconstruction ensemble that is similar to a white-noise stochastic process in time. The analogue method is also successful in reconstructing decadal temperatures, while BARCAST fails. The results contribute to constraining uncertainties in CFR for ocean dynamics which are highly important for climate across the globe.en_US
dc.identifier.citationNilsen T, Talento S, Werner JP. Constraining two climate field reconstruction methodologies over the North Atlantic realm using pseudo-proxy experiments. Quaternary Science Reviews. 2021;265:107009-107009en_US
dc.identifier.cristinIDFRIDAID 2012363
dc.identifier.doi10.1016/j.quascirev.2021.107009
dc.identifier.issn0277-3791
dc.identifier.issn1873-457X
dc.identifier.urihttps://hdl.handle.net/10037/24662
dc.language.isoengen_US
dc.publisherElsevieren_US
dc.relation.journalQuaternary Science Reviews
dc.rights.accessRightsopenAccessen_US
dc.rights.holderCopyright 2021 The Author(s)en_US
dc.subjectVDP::Matematikk og naturvitenskap: 400::Geofag: 450en_US
dc.subjectVDP::Mathematics and natural scienses: 400::Geosciences: 450en_US
dc.subjectVDP::Matematikk og naturvitenskap: 400en_US
dc.subjectVDP::Mathematics and natural scienses: 400en_US
dc.subjectKlimadynamikk / Climate dynamicsen_US
dc.subjectPaleoklima / Paleoclimateen_US
dc.subjectStatistikk / Statisticsen_US
dc.titleConstraining two climate field reconstruction methodologies over the North Atlantic realm using pseudo-proxy experimentsen_US
dc.type.versionpublishedVersionen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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