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dc.contributor.authorHartl-Meier, CTMen
dc.contributor.authorBuentgen, Ulfen
dc.contributor.authorSmerdon, JEen
dc.contributor.authorZorita, Een
dc.contributor.authorKrusic, Paulen
dc.contributor.authorLjungqvist, FCen
dc.contributor.authorSchneider, Len
dc.contributor.authorEsper, Jen
dc.date.accessioned2018-04-13T09:23:53Z
dc.date.available2018-04-13T09:23:53Z
dc.identifier.issn0094-8276
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/274835
dc.description.abstractSpatial covariance in the simulated temperature evolution over the past millennium has been reported to exceed that of multiproxy-based reconstructions. Here we use tree ring-based temperature reconstructions and state-of-the-art climate model simulations to assess temporal changes in Northern Hemisphere intercontinental temperature covariance during the last 1000 years. Tree ring-only approaches reveal stronger agreement with model simulations compared to multiproxy networks. Although simulated temperatures exhibit a substantial spread among individual models, intercontinental temperature coherency is mainly driven by the cooling of large volcanic eruptions in 1257, 1452, 1600, and 1815 Common Era. The coherence of these synchronizing events appears to be elevated in several climate simulations relative to their own unforced covariance baselines and in comparison to the proxy reconstructions. This suggests that some models likely overestimate the amplitude of abrupt summer cooling in response to volcanic eruptions, particularly at larger spatial scales.
dc.description.sponsorshipSupported by the German Science Foundation, grant 161/9-1 and the U.S. National Science Foundation grant AGS-1602920. U. Büntgen received funding from the Ministry of Education, Youth and Sports of Czech Republic within the National Sustainability Program I (NPU I; GN LO1415).
dc.publisherAGU Publications
dc.subjectpaleoclimateen
dc.subjectspatial temperature synchronyen
dc.subjectmillennial scaleen
dc.subjectradiative forcingen
dc.subjectproxy model comparisonen
dc.titleTemperature Covariance in Tree Ring Reconstructions and Model Simulations Over the Past Millenniumen
dc.typeArticle
prism.endingPage9469
prism.publicationNameGeophysical Research Lettersen
prism.startingPage9458
prism.volume44en
dc.identifier.doi10.17863/CAM.21982
dcterms.dateAccepted2017-09-01en
rioxxterms.versionofrecord10.1002/2017GL073239en
rioxxterms.versionVoR*
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserveden
rioxxterms.licenseref.startdate2017-09-01en
dc.contributor.orcidBuentgen, Ulf [0000-0002-3821-0818]
dc.contributor.orcidKrusic, Paul [0000-0001-5358-9697]
dc.identifier.eissn1944-8007
rioxxterms.typeJournal Article/Reviewen
cam.issuedOnline2017-09-07en


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