Precession Affects the Timing and Duration of Summer and Rainy Season in East Asia

Precession Affects the Timing and Duration of Summer and Rainy Season in East Asia | 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 Research Article Precession Affects the Timing and Duration of Summer and Rainy Season in East Asia Tingting Liu, Hu Yang, Xiaoxu Shi, Hang Wang, Haiwei Zhang, Dake Chen This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-6642080/v1 This work is licensed under a CC BY 4.0 License Status: Posted Version 1 posted You are reading this latest preprint version Abstract East Asia, a densely populated economic center, is profoundly influenced by the seasonality of temperature and precipitation, which is vital for its agriculture and ecosystem. Geological records, such as speleothems and lake sediments, reveal that precession influences orbital climate variabilities in this region. However, they often fail to capture seasonal-scale variations. Here, by reconstructing a full precession cycle using the Alfred Wegener Institute Earth System Model (AWI-ESM), we examine how precession impacts the seasonality of temperature and precipitation in the East Asia. Our simulations illustrate that precession changes the timing and duration of summer and rainy season in this region. Specifically, under high eccentricity, the summer can vary in duration by up to 57 days, with the onset and termination varies by up to 48 and 52 days, respectively. Similarly, the duration of the rainy season can vary by up to 21 days, with the onset and termination date shift by up to 31 days and 35 days separately. Further analysis reveals that precession controls these changes by reshaping the timing of perihelion, which modulates surface temperature and the position of the subtropical high system. These findings emphasize the critical role of changing seasonality of temperature and precipitation in refining paleoclimate interpretations, offering insights into precession-driven climate dynamics in subtropical regions and providing a theoretical basis for future climate projections. Atmospheric Sciences Precession Monsoon Seasonality Summer Rainy Season Full Text Additional Declarations The authors declare no competing interests. Supplementary Files Supplementary.pdf Precession Affects the Timing and Duration of Summer and Rainy Season in East Asia Cite Share Download PDF Status: Posted Version 1 posted 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. As a division of Research Square Company, we’re committed to making research communication faster, fairer, and more useful. We do this by developing innovative software and high quality services for the global research community. Our growing team is made up of researchers and industry professionals working together to solve the most critical problems facing scientific publishing. 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-6642080","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":455026183,"identity":"4fedb282-fabe-46a5-973b-f7d5908ab159","order_by":0,"name":"Tingting Liu","email":"","orcid":"","institution":"School of Marine Sciences, Sun Yat-Sen University,Zhuhai, China","correspondingAuthor":false,"prefix":"","firstName":"Tingting","middleName":"","lastName":"Liu","suffix":""},{"id":455026184,"identity":"641b700c-b977-4f7e-b973-e3b3eff9ef4b","order_by":1,"name":"Hu Yang","email":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAZAAAAAyAQMAAABI0h/eAAAABlBMVEX///8AAABVwtN+AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAA3ElEQVRIiWNgGAWjYJACZgYGGwYGdjDjAAMbkVrSwCRJWg4jtBAEBsfPHn5d2HbeXreZgflzYdsdeT4G5mcP8Go5k5dmPbPtduI2oEXGM9ueGbYxsJkb4NVyIMfMmLftdoLZYf4PybxthxnbGHjYJPBqOf8GpOWcvRnQlsNALfaEtdzIMX7M23aAEegwxmaglkSCWiRvvDFj5jmXDPILM5BxOLmNmc0Mrxa+8znGn3nK7OzNjjcwAxmHbee3Nz/Dq0UBGHdoCpjxqQcC+QYG5g8E1IyCUTAKRsFIBwASvETLB8dJMwAAAABJRU5ErkJggg==","orcid":"","institution":"Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai, China","correspondingAuthor":true,"prefix":"","firstName":"Hu","middleName":"","lastName":"Yang","suffix":""},{"id":455026185,"identity":"b3b30166-dac5-461d-b9f0-0d151084f8e7","order_by":2,"name":"Xiaoxu Shi","email":"","orcid":"","institution":"Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai, China","correspondingAuthor":false,"prefix":"","firstName":"Xiaoxu","middleName":"","lastName":"Shi","suffix":""},{"id":455026186,"identity":"5be237f1-6d45-47b9-b27d-c6f87abf814b","order_by":3,"name":"Hang Wang","email":"","orcid":"","institution":"School of Atmospheric Sciences, Sun Yat-Sen University,Zhuhai, China","correspondingAuthor":false,"prefix":"","firstName":"Hang","middleName":"","lastName":"Wang","suffix":""},{"id":455026187,"identity":"95834f7d-16c2-4631-8a2f-fb4ad2011022","order_by":4,"name":"Haiwei Zhang","email":"","orcid":"","institution":"Institute of Global Environmental Change, Xi'an Jiaotong University, Xi'an, China","correspondingAuthor":false,"prefix":"","firstName":"Haiwei","middleName":"","lastName":"Zhang","suffix":""},{"id":455026188,"identity":"5a14e1a5-e2ba-4130-a72a-e2c8087cdd9e","order_by":5,"name":"Dake Chen","email":"","orcid":"","institution":"Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai, China","correspondingAuthor":false,"prefix":"","firstName":"Dake","middleName":"","lastName":"Chen","suffix":""}],"badges":[],"createdAt":"2025-05-12 02:04:34","currentVersionCode":1,"declarations":{"humanSubjects":false,"vertebrateSubjects":false,"conflictsOfInterestStatement":false,"humanSubjectEthicalGuidelines":false,"humanSubjectConsent":false,"humanSubjectClinicalTrial":false,"humanSubjectCaseReport":false,"vertebrateSubjectEthicalGuidelines":false},"doi":"10.21203/rs.3.rs-6642080/v1","doiUrl":"https://doi.org/10.21203/rs.3.rs-6642080/v1","draftVersion":[],"editorialEvents":[],"editorialNote":"","failedWorkflow":false,"files":[{"id":82588824,"identity":"76f94488-74b8-4e4d-aeb6-da6c4026e07c","added_by":"auto","created_at":"2025-05-13 07:37:14","extension":"pdf","order_by":1,"title":"","display":"","copyAsset":false,"role":"manuscript-pdf","size":17762354,"visible":true,"origin":"","legend":"","description":"","filename":"v15.pdf","url":"https://assets-eu.researchsquare.com/files/rs-6642080/v1_covered_bad16158-fbfc-422a-88fd-d9a376e5df07.pdf"},{"id":82588259,"identity":"2a7623fe-4c28-4176-b563-a37ac166052c","added_by":"auto","created_at":"2025-05-13 07:28:57","extension":"pdf","order_by":1,"title":"","display":"","copyAsset":false,"role":"supplement","size":37460632,"visible":true,"origin":"","legend":"\u003cp\u003ePrecession Affects the Timing and Duration of Summer and Rainy Season in East Asia\u003c/p\u003e","description":"","filename":"Supplementary.pdf","url":"https://assets-eu.researchsquare.com/files/rs-6642080/v1/3a3efcd8092609143126fdb1.pdf"}],"financialInterests":"The authors declare no competing interests.","formattedTitle":"\u003cp\u003ePrecession Affects the Timing and Duration of Summer and Rainy Season in East Asia\u003c/p\u003e","fulltext":[],"fulltextSource":"","fullText":"","funders":[],"hasAdminPriorityOnWorkflow":false,"hasManuscriptDocX":false,"hasOptedInToPreprint":true,"hasPassedJournalQc":"","hasAnyPriority":true,"hideJournal":true,"highlight":"","institution":"","isAcceptedByJournal":false,"isAuthorSuppliedPdf":true,"isDeskRejected":"","isHiddenFromSearch":false,"isInQc":false,"isInWorkflow":false,"isPdf":true,"isPdfUpToDate":true,"isWithdrawnOrRetracted":false,"journal":{"display":true,"email":"[email protected]","identity":"researchsquare","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":true,"externalIdentity":"","sideBox":"","snPcode":"","submissionUrl":"/submission","title":"Research Square","twitterHandle":"researchsquare","acdcEnabled":true,"dfaEnabled":false,"editorialSystem":"","reportingPortfolio":"","inReviewEnabled":false,"inReviewRevisionsEnabled":true},"keywords":"Precession, Monsoon, Seasonality, Summer, Rainy Season","lastPublishedDoi":"10.21203/rs.3.rs-6642080/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-6642080/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"\u003cp\u003eEast Asia, a densely populated economic center, is profoundly influenced by the seasonality of temperature and precipitation, which is vital for its agriculture and ecosystem. Geological records, such as speleothems and lake sediments, reveal that precession influences orbital climate variabilities in this region. However, they often fail to capture seasonal-scale variations. Here, by reconstructing a full precession cycle using the Alfred Wegener Institute Earth System Model (AWI-ESM), we examine how precession impacts the seasonality of temperature and precipitation in the East Asia. Our simulations illustrate that precession changes the timing and duration of summer and rainy season in this region. Specifically, under high eccentricity, the summer can vary in duration by up to 57 days, with the onset and termination varies by up to 48 and 52 days, respectively. Similarly, the duration of the rainy season can vary by up to 21 days, with the onset and termination date shift by up to 31 days and 35 days separately. Further analysis reveals that precession controls these changes by reshaping the timing of perihelion, which modulates surface temperature and the position of the subtropical high system. These findings emphasize the critical role of changing seasonality of temperature and precipitation in refining paleoclimate interpretations, offering insights into precession-driven climate dynamics in subtropical regions and providing a theoretical basis for future climate projections.\u003c/p\u003e","manuscriptTitle":"Precession Affects the Timing and Duration of Summer and Rainy Season in East Asia","msid":"","msnumber":"","nonDraftVersions":[{"code":1,"date":"2025-05-13 07:28:51","doi":"10.21203/rs.3.rs-6642080/v1","editorialEvents":[{"type":"communityComments","content":0}],"status":"published","journal":{"display":true,"email":"[email protected]","identity":"researchsquare","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":true,"externalIdentity":"","sideBox":"","snPcode":"","submissionUrl":"/submission","title":"Research Square","twitterHandle":"researchsquare","acdcEnabled":true,"dfaEnabled":false,"editorialSystem":"","reportingPortfolio":"","inReviewEnabled":false,"inReviewRevisionsEnabled":true}}],"origin":"","ownerIdentity":"b4c386de-3970-49fa-b886-15d325523a96","owner":[],"postedDate":"May 13th, 2025","published":true,"recentEditorialEvents":[],"rejectedJournal":[],"revision":"","amendment":"","status":"posted","subjectAreas":[{"id":48446841,"name":"Atmospheric Sciences"}],"tags":[],"updatedAt":"2025-05-13T07:28:51+00:00","versionOfRecord":[],"versionCreatedAt":"2025-05-13 07:28:51","video":"","vorDoi":"","vorDoiUrl":"","workflowStages":[]},"version":"v1","identity":"rs-6642080","journalConfig":"researchsquare"},"__N_SSP":true},"page":"/article/[identity]/[[...version]]","query":{"redirect":"/article/rs-6642080","identity":"rs-6642080","version":["v1"]},"buildId":"8U1c8b4HqxoKbykW_rLl7","isFallback":false,"isExperimentalCompile":false,"dynamicIds":[84888],"gssp":true,"scriptLoader":[]}