• Login
    View Item 
    •   Home
    • UA Faculty Research
    • UA Faculty Publications
    • View Item
    •   Home
    • UA Faculty Research
    • UA Faculty Publications
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Browse

    All of UA Campus RepositoryCommunitiesTitleAuthorsIssue DateSubmit DateSubjectsPublisherJournalThis CollectionTitleAuthorsIssue DateSubmit DateSubjectsPublisherJournal

    My Account

    LoginRegister

    About

    AboutUA Faculty PublicationsUA DissertationsUA Master's ThesesUA Honors ThesesUA PressUA YearbooksUA Catalogs

    Statistics

    Display statistics

    Simulation of Eocene extreme warmth and high climate sensitivity through cloud feedbacks

    • CSV
    • RefMan
    • EndNote
    • BibTex
    • RefWorks
    Thumbnail
    Name:
    eaax1874.full.pdf
    Size:
    773.5Kb
    Format:
    PDF
    Description:
    Final Published Version
    Download
    Author
    Zhu, Jiang
    Poulsen, Christopher J
    Tierney, Jessica E
    Affiliation
    Univ Arizona, Dept Geosci
    Issue Date
    2019-09-18
    
    Metadata
    Show full item record
    Publisher
    AMER ASSOC ADVANCEMENT SCIENCE
    Citation
    J. Zhu, C. J. Poulsen, J. E. Tierney, Simulation of Eocene extreme warmth and high climate sensitivity through cloud feed backs. Sci. Adv. 5, eaax1874 (2019).
    Journal
    SCIENCE ADVANCES
    Rights
    Copyright © 2019 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).
    Collection Information
    This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.
    Abstract
    The Early Eocene, a period of elevated atmospheric CO2 (>1000 ppmv), is considered an analog for future climate. Previous modeling attempts have been unable to reproduce major features of Eocene climate indicated by proxy data without substantial modification to the model physics. Here, we present simulations using a state-of-the-art climate model forced by proxy-estimated CO2 levels that capture the extreme surface warmth and reduced latitudinal temperature gradient of the Early Eocene and the warming of the Paleocene-Eocene Thermal Maximum. Our simulations exhibit increasing equilibrium climate sensitivity with warming and suggest an Eocene sensitivity of more than 6.6°C, much greater than the present-day value (4.2°C). This higher climate sensitivity is mainly attributable to the shortwave cloud feedback, which is linked primarily to cloud microphysical processes. Our findings highlight the role of small-scale cloud processes in determining large-scale climate changes and suggest a potential increase in climate sensitivity with future warming.
    Note
    Open access journal
    ISSN
    2375-2548
    PubMed ID
    31555736
    DOI
    10.1126/sciadv.aax1874
    Version
    Final published version
    Sponsors
    Heising-Simons Foundation [2016-015]
    ae974a485f413a2113503eed53cd6c53
    10.1126/sciadv.aax1874
    Scopus Count
    Collections
    UA Faculty Publications

    entitlement

    Related articles

    • Sensitivity of the Palaeocene-Eocene Thermal Maximum climate to cloud properties.
    • Authors: Kiehl JT, Shields CA
    • Issue date: 2013 Oct 28
    • The Early Eocene equable climate problem: can perturbations of climate model parameters identify possible solutions?
    • Authors: Sagoo N, Valdes P, Flecker R, Gregoire LJ
    • Issue date: 2013 Oct 28
    • Changing atmospheric CO2 concentration was the primary driver of early Cenozoic climate.
    • Authors: Anagnostou E, John EH, Edgar KM, Foster GL, Ridgwell A, Inglis GN, Pancost RD, Lunt DJ, Pearson PN
    • Issue date: 2016 May 19
    • Time-dependent climate sensitivity and the legacy of anthropogenic greenhouse gas emissions.
    • Authors: Zeebe RE
    • Issue date: 2013 Aug 20
    • Synchronous tropical and polar temperature evolution in the Eocene.
    • Authors: Cramwinckel MJ, Huber M, Kocken IJ, Agnini C, Bijl PK, Bohaty SM, Frieling J, Goldner A, Hilgen FJ, Kip EL, Peterse F, van der Ploeg R, Röhl U, Schouten S, Sluijs A
    • Issue date: 2018 Jul
    The University of Arizona Libraries | 1510 E. University Blvd. | Tucson, AZ 85721-0055
    Tel 520-621-6442 | repository@u.library.arizona.edu
    DSpace software copyright © 2002-2017  DuraSpace
    Quick Guide | Contact Us | Send Feedback
    Open Repository is a service operated by 
    Atmire NV
     

    Export search results

    The export option will allow you to export the current search results of the entered query to a file. Different formats are available for download. To export the items, click on the button corresponding with the preferred download format.

    By default, clicking on the export buttons will result in a download of the allowed maximum amount of items.

    To select a subset of the search results, click "Selective Export" button and make a selection of the items you want to export. The amount of items that can be exported at once is similarly restricted as the full export.

    After making a selection, click one of the export format buttons. The amount of items that will be exported is indicated in the bubble next to export format.