A constructed PDO history for the past three centuries derived from an ice core isotope record on the central Tibetan Plateau

A constructed PDO history for the past three centuries derived from an ice core isotope record on the central Tibetan Plateau | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Article A constructed PDO history for the past three centuries derived from an ice core isotope record on the central Tibetan Plateau Lide Tian, Shijie Li, Zhongyin Cai, Di Wang, Lili Shao, Xiaoyi Yang, and 3 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-4460340/v1 This work is licensed under a CC BY 4.0 License Status: Published Journal Publication published 02 Nov, 2024 Read the published version in npj Climate and Atmospheric Science → Version 1 posted 9 You are reading this latest preprint version Abstract Ice core oxygen isotope (δ 18 O) records from low-latitude regions preserve high-resolution climate records in the past, yet the interpretation of these ice core δ 18 O records is still facing difficulty due to the uncertainty of ice core dating. Here we present a new established δ 18 O time series from Qiangtang (QT) No. 1 ice core retrieved from the central Tibetan Plateau. Given the vagueness of the seasonal signals in the QT ice core, we investigated the spectral properties of δ 18 O record with respect to depth and discussed the implications of significant spectral power peaks in the QT ice core. We employed a variational mode decomposition (VMD) analysis for the upper part of the QT ice core to decompose the δ 18 O depth series in order to separate the El Niño Southern Oscillation (ENSO) mode, a signal strongly preserved in the QT ice core δ 18 O record. With this approach, we established a time series of 335 years (1677–2011 CE) for the upper 50 m of the QT ice core. Subsequently, we examined the frequency of the new established δ 18 O time series and detected strong signals of the bidecadal and multidecadal modes of Pacific Decadal Oscillation (PDO). The PDO consists of two modes with periods of approximately 25–35 years and 50–70 years, and we found that the 50–70 years periodicity has persisted since 1700 CE, succeeded by dominance of the 25–75 years periodicity after 1900 CE. Additionally, we analyzed the δ 18 O series of the QT ice core during the past century and determined that the increasing frequency of El Niño events is an important factor contributing to the increase in ice core δ 18 O. Earth and environmental sciences/Climate sciences/Cryospheric science Earth and environmental sciences/Climate sciences/Climate change Oxygen isotope records Ice core dating Variational mode decomposition El Niño Southern Oscillation Pacific climate variability Full Text Additional Declarations (Not answered) Supplementary Files Supplementrayinformation.docx Cite Share Download PDF Status: Published Journal Publication published 02 Nov, 2024 Read the published version in npj Climate and Atmospheric Science → Version 1 posted Editorial decision: revise 05 Jul, 2024 Review # 1 received at journal 29 Jun, 2024 Review # 2 received at journal 24 Jun, 2024 Reviewer # 2 agreed at journal 28 May, 2024 Reviewer # 1 agreed at journal 27 May, 2024 Reviewers invited by journal 27 May, 2024 Editor assigned by journal 26 May, 2024 Submission checks completed at journal 23 May, 2024 First submitted to journal 22 May, 2024 You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. 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Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-4460340","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Article","associatedPublications":[],"authors":[{"id":307171420,"identity":"fe15c2c8-7a7a-4b8b-a3db-b576afc2f593","order_by":0,"name":"Lide 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