{"action":"create","ckan_id":null,"date_created":"Wed, 23 Jul 2025 04:17:22 GMT","date_finished":null,"harvest_job_id":"527daac2-533c-4e2c-bc94-523b955975d9","harvest_source_id":"c9b25d3a-f997-484c-92d5-c9348dca1f2f","id":"1ee4bc3b-478a-4220-8a06-567fb396427d","identifier":"https://data.noaa.gov/waf/NOAA/NESDIS/ncei/paleo/iso/xml/noaa-model-20990.xml","parent_identifier":null,"source_hash":"42730bc22d06652bdf42af13add2187965ad16ffe45ded129334448e00cf7b56","source_raw":"\r\n \r\n noaa-model-20990\r\n \r\n \r\n eng; USA\r\n \r\n \r\n utf8\r\n \r\n \r\n dataset\r\n \r\n \r\n \r\n \r\n NOAA National Centers for Environmental Information\r\n \r\n \r\n \r\n \r\n \r\n \r\n ncei.info@noaa.gov\r\n \r\n \r\n \r\n \r\n \r\n \r\n https://www.ncei.noaa.gov/contact\r\n \r\n \r\n NCEI Contact Information\r\n \r\n \r\n Information for contacts at NCEI.\r\n \r\n \r\n information\r\n \r\n \r\n \r\n \r\n \r\n \r\n pointOfContact\r\n \r\n \r\n \r\n \r\n \r\n \r\n NOAA World Data Service for Paleoclimatology\r\n \r\n \r\n Data Center Contact\r\n \r\n \r\n \r\n \r\n \r\n \r\n 828-271-4800\r\n \r\n \r\n 303-497-6513\r\n \r\n \r\n \r\n \r\n \r\n \r\n 325 Broadway, E/NE31\r\n \r\n \r\n Boulder\r\n \r\n \r\n CO\r\n \r\n \r\n 80305-3328\r\n \r\n \r\n USA\r\n \r\n \r\n paleo@noaa.gov\r\n \r\n \r\n \r\n \r\n \r\n \r\n pointOfContact\r\n \r\n \r\n \r\n \r\n 2024-02-24\r\n \r\n \r\n ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data\r\n \r\n \r\n ISO 19115-2:2009(E)\r\n \r\n \r\n \r\n \r\n \r\n \r\n NOAA/WDS Paleoclimatology - Mesoproterozoic Global Climate Model Simulations\r\n \r\n \r\n \r\n \r\n 2017-01-09\r\n \r\n \r\n publication\r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n doi:10.25921/hx02-rj03\r\n \r\n \r\n \r\n \r\n \r\n \r\n noaa-model-20990\r\n \r\n \r\n \r\n \r\n \r\n \r\n NCEI DSI 1200_02\r\n \r\n \r\n \r\n \r\n \r\n \r\n NCEI DSI 1200_01\r\n \r\n \r\n \r\n \r\n \r\n \r\n Fiorella, R.P.\r\n \r\n \r\n originator\r\n \r\n \r\n \r\n \r\n \r\n \r\n Fiorella, R.P.\r\n \r\n \r\n author\r\n \r\n \r\n \r\n \r\n \r\n \r\n Sheldon, N.D.\r\n \r\n \r\n originator\r\n \r\n \r\n \r\n \r\n \r\n \r\n Sheldon, N.D.\r\n \r\n \r\n author\r\n \r\n \r\n \r\n \r\n \r\n \r\n NOAA National Centers for Environmental Information\r\n \r\n \r\n publisher\r\n \r\n \r\n \r\n \r\n tableDigital\r\n \r\n \r\n \r\n \r\n This archived Paleoclimatology Study is available from the NOAA National Centers for Environmental Information (NCEI), under the World Data Service (WDS) for Paleoclimatology. The associated NCEI study type is Paleoclimatology Modeling. The data include parameters of paleoclimatic modeling with a geographic location of Global. The time period coverage is from 1600000000 to 1000000000 in calendar years before present (BP). See metadata information for parameter and study location details. Please cite this study when using the data.\r\n \r\n \r\n Computer simulations of past climate. Variables provided as model output are described by parameter keyword. In some cases the parameter keywords are a subset of all archived model output, and additional output is available upon request. Additional summary information can be found in the abstracts of papers listed in the dataset citations.\r\n \r\n \r\n completed\r\n \r\n \r\n \r\n \r\n NOAA National Centers for Environmental Information\r\n \r\n \r\n \r\n \r\n \r\n \r\n ncei.info@noaa.gov\r\n \r\n \r\n \r\n \r\n \r\n \r\n https://www.ncei.noaa.gov/contact\r\n \r\n \r\n NCEI Contact Information\r\n \r\n \r\n Information for contacts at NCEI.\r\n \r\n \r\n information\r\n \r\n \r\n \r\n \r\n \r\n \r\n pointOfContact\r\n \r\n \r\n \r\n \r\n \r\n \r\n NOAA World Data Service for Paleoclimatology\r\n \r\n \r\n Data Center Contact\r\n \r\n \r\n \r\n \r\n \r\n \r\n 828-271-4800\r\n \r\n \r\n 303-497-6513\r\n \r\n \r\n \r\n \r\n \r\n \r\n 325 Broadway, E/NE31\r\n \r\n \r\n Boulder\r\n \r\n \r\n CO\r\n \r\n \r\n 80305-3328\r\n \r\n \r\n USA\r\n \r\n \r\n paleo@noaa.gov\r\n \r\n \r\n \r\n \r\n \r\n \r\n pointOfContact\r\n \r\n \r\n \r\n \r\n \r\n \r\n https://www.ncei.noaa.gov/pub/data/paleo/webimages/pc-default-model.png\r\n \r\n \r\n Paleoclimatology - Modeling\r\n \r\n \r\n PNG\r\n \r\n \r\n \r\n \r\n \r\n \r\n Earth Science > Climate Indicators > Paleoclimate Indicators > Paleoclimate Reconstructions\r\n \r\n \r\n theme\r\n \r\n \r\n \r\n \r\n Global Change Master Directory (GCMD) Science Keywords\r\n \r\n \r\n \r\n \r\n 2024\r\n \r\n \r\n revision\r\n \r\n \r\n \r\n \r\n 19\r\n \r\n \r\n \r\n \r\n Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA)\r\n \r\n \r\n \r\n \r\n \r\n \r\n https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords\r\n \r\n \r\n GCMD Keyword Forum Page\r\n \r\n \r\n Global Change Master Directory (GCMD). 2024. GCMD Keywords, Version 19. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords\r\n \r\n \r\n information\r\n \r\n \r\n \r\n \r\n \r\n \r\n custodian\r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n earth science > paleoclimate > paleoclimatic modeling\r\n \r\n \r\n earth science > paleoclimate > paleoclimatic modeling\r\n \r\n \r\n earth science > paleoclimate > paleoclimatic modeling\r\n \r\n \r\n earth science > paleoclimate > paleoclimatic modeling\r\n \r\n \r\n earth science > paleoclimate > paleoclimatic modeling\r\n \r\n \r\n earth science > paleoclimate > paleoclimatic modeling\r\n \r\n \r\n earth science > paleoclimate > paleoclimatic modeling\r\n \r\n \r\n earth science > paleoclimate > paleoclimatic modeling\r\n \r\n \r\n earth science > paleoclimate > paleoclimatic modeling\r\n \r\n \r\n earth science > paleoclimate > paleoclimatic modeling\r\n \r\n \r\n earth science > paleoclimate > paleoclimatic modeling\r\n \r\n \r\n earth science > paleoclimate > paleoclimatic modeling\r\n \r\n \r\n earth science > paleoclimate > paleoclimatic modeling\r\n \r\n \r\n earth science > paleoclimate > paleoclimatic modeling\r\n \r\n \r\n earth science > paleoclimate > paleoclimatic modeling\r\n \r\n \r\n earth science > paleoclimate > paleoclimatic modeling\r\n \r\n \r\n earth science > paleoclimate > paleoclimatic modeling\r\n \r\n \r\n earth science > paleoclimate > paleoclimatic modeling\r\n \r\n \r\n earth science > paleoclimate > paleoclimatic modeling\r\n \r\n \r\n earth science > paleoclimate > paleoclimatic modeling\r\n \r\n \r\n earth science > paleoclimate > paleoclimatic modeling\r\n \r\n \r\n earth science > paleoclimate > paleoclimatic modeling\r\n \r\n \r\n earth science > paleoclimate > paleoclimatic modeling\r\n \r\n \r\n earth science > paleoclimate > paleoclimatic modeling\r\n \r\n \r\n earth science > paleoclimate > paleoclimatic modeling\r\n \r\n \r\n earth science > paleoclimate > paleoclimatic modeling\r\n \r\n \r\n earth science > paleoclimate > paleoclimatic modeling\r\n \r\n \r\n earth science > paleoclimate > paleoclimatic modeling\r\n \r\n \r\n earth science > paleoclimate > paleoclimatic modeling\r\n \r\n \r\n earth science > paleoclimate > paleoclimatic modeling\r\n \r\n \r\n earth science > paleoclimate > paleoclimatic modeling\r\n \r\n \r\n earth science > paleoclimate > paleoclimatic modeling\r\n \r\n \r\n earth science > paleoclimate > paleoclimatic modeling\r\n \r\n \r\n earth science > paleoclimate > paleoclimatic modeling\r\n \r\n \r\n earth science > paleoclimate > paleoclimatic modeling\r\n \r\n \r\n earth science > paleoclimate > paleoclimatic modeling\r\n \r\n \r\n earth science > paleoclimate > paleoclimatic modeling\r\n \r\n \r\n earth science > paleoclimate > paleoclimatic modeling\r\n \r\n \r\n earth science > paleoclimate > paleoclimatic modeling\r\n \r\n \r\n earth science > paleoclimate > paleoclimatic modeling\r\n \r\n \r\n earth science > paleoclimate > paleoclimatic modeling\r\n \r\n \r\n earth science > paleoclimate > paleoclimatic modeling\r\n \r\n \r\n earth science > paleoclimate > paleoclimatic modeling\r\n \r\n \r\n earth science > paleoclimate > paleoclimatic modeling\r\n \r\n \r\n earth science > paleoclimate > paleoclimatic modeling\r\n \r\n \r\n earth science > paleoclimate > paleoclimatic modeling\r\n \r\n \r\n earth science > paleoclimate > paleoclimatic modeling\r\n \r\n \r\n earth science > paleoclimate > paleoclimatic modeling\r\n \r\n \r\n earth science > paleoclimate > paleoclimatic modeling\r\n \r\n \r\n earth science > paleoclimate > paleoclimatic modeling\r\n \r\n \r\n earth science > paleoclimate > paleoclimatic modeling\r\n \r\n \r\n earth science > paleoclimate > paleoclimatic modeling\r\n \r\n \r\n earth science > paleoclimate > paleoclimatic modeling\r\n \r\n \r\n earth science > paleoclimate > paleoclimatic modeling\r\n \r\n \r\n earth science > paleoclimate > paleoclimatic modeling\r\n \r\n \r\n earth science > paleoclimate > paleoclimatic modeling\r\n \r\n \r\n earth science > paleoclimate > paleoclimatic modeling\r\n \r\n \r\n earth science > paleoclimate > paleoclimatic modeling\r\n \r\n \r\n earth science > paleoclimate > paleoclimatic modeling\r\n \r\n \r\n earth science > paleoclimate > paleoclimatic modeling\r\n \r\n \r\n earth science > paleoclimate > paleoclimatic modeling\r\n \r\n \r\n earth science > paleoclimate > paleoclimatic modeling\r\n \r\n \r\n earth science > paleoclimate > paleoclimatic modeling\r\n \r\n \r\n earth science > paleoclimate > paleoclimatic modeling\r\n \r\n \r\n earth science > paleoclimate > paleoclimatic modeling\r\n \r\n \r\n earth science > paleoclimate > paleoclimatic modeling\r\n \r\n \r\n earth science > paleoclimate > paleoclimatic modeling\r\n \r\n \r\n earth science > paleoclimate > paleoclimatic modeling\r\n \r\n \r\n earth science > paleoclimate > paleoclimatic modeling\r\n \r\n \r\n earth science > paleoclimate > paleoclimatic modeling\r\n \r\n \r\n earth science > paleoclimate > paleoclimatic modeling\r\n \r\n \r\n earth science > paleoclimate > paleoclimatic modeling\r\n \r\n \r\n earth science > paleoclimate > paleoclimatic modeling\r\n \r\n \r\n earth science > paleoclimate > paleoclimatic modeling\r\n \r\n \r\n earth science > paleoclimate > model > atmosphere model\r\n \r\n \r\n theme\r\n \r\n \r\n \r\n \r\n Global Change Master Directory (GCMD) Science Keywords\r\n \r\n \r\n \r\n \r\n 2024\r\n \r\n \r\n revision\r\n \r\n \r\n \r\n \r\n 19\r\n \r\n \r\n \r\n \r\n Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA)\r\n \r\n \r\n \r\n \r\n \r\n \r\n https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords\r\n \r\n \r\n GCMD Keyword Forum Page\r\n \r\n \r\n Global Change Master Directory (GCMD). 2024. GCMD Keywords, Version 19. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords\r\n \r\n \r\n information\r\n \r\n \r\n \r\n \r\n \r\n \r\n custodian\r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n What: cloud cover; Material: null\r\n \r\n \r\n What: temperature tendency; Material: null\r\n \r\n \r\n What: surface downwelling clear-sky longwave radiation; Material: null\r\n \r\n \r\n What: surface downwelling clear-sky shortwave radiation; Material: null\r\n \r\n \r\n What: insolation; Material: null\r\n \r\n \r\n What: cloud ice mixing ratio; Material: null\r\n \r\n \r\n What: insolation; Material: null\r\n \r\n \r\n What: maximum surface temperature; Material: null\r\n \r\n \r\n What: eastward wind speed; Material: null\r\n \r\n \r\n What: geopotential height; Material: null\r\n \r\n \r\n What: aerosol optical depth; Material: null\r\n \r\n \r\n What: cloud ice mixing ratio; Material: null\r\n \r\n \r\n What: top-of-atmosphere net downward clear-sky shortwave radiation; Material: null\r\n \r\n \r\n What: cloud liquid water mixing ratio; Material: null\r\n \r\n \r\n What: surface type; Material: null\r\n \r\n \r\n What: surface type; Material: null\r\n \r\n \r\n What: evaporation; Material: null\r\n \r\n \r\n What: relative humidity; Material: null\r\n \r\n \r\n What: surface downward x stress; Material: null\r\n \r\n \r\n What: cloud liquid water content; Material: null\r\n \r\n \r\n What: surface air temperature; Material: null\r\n \r\n \r\n What: top-of-atmosphere outgoing longwave radiation; Material: null\r\n \r\n \r\n What: sea ice cover; Material: null\r\n \r\n \r\n What: vertical pressure velocity; Material: null\r\n \r\n \r\n What: surface geopotential; Material: null\r\n \r\n \r\n What: cloud condensed water content; Material: null\r\n \r\n \r\n What: cloud ice content; Material: null\r\n \r\n \r\n What: cloud cover; Material: null\r\n \r\n \r\n What: cloud ice content; Material: null\r\n \r\n \r\n What: surface net upward longwave radiation; Material: null\r\n \r\n \r\n What: top-of-atmosphere net upward longwave radiation; Material: null\r\n \r\n \r\n What: surface net downward shortwave radiation; Material: null\r\n \r\n \r\n What: top-of-atmosphere net downward shortwave radiation; Material: null\r\n \r\n \r\n What: longwave cloud radiative effect; Material: null\r\n \r\n \r\n What: surface downwelling shortwave radiation; Material: null\r\n \r\n \r\n What: surface net downward clear-sky shortwave radiation; Material: null\r\n \r\n \r\n What: top-of-atmosphere net downward clear-sky shortwave radiation; Material: null\r\n \r\n \r\n What: top-of-atmosphere outgoing shortwave radiation; Material: null\r\n \r\n \r\n What: latent heat flux; Material: null\r\n \r\n \r\n What: large-scale precipitation; Material: null\r\n \r\n \r\n What: specific humidity; Material: null\r\n \r\n \r\n What: temperature tendency; Material: null\r\n \r\n \r\n What: temperature; Material: null\r\n \r\n \r\n What: precipitable water; Material: null\r\n \r\n \r\n What: northward ocean heat transport; Material: null\r\n \r\n \r\n What: minimum surface temperature; Material: null\r\n \r\n \r\n What: latitude; Material: null\r\n \r\n \r\n What: surface downwelling longwave radiation; Material: null\r\n \r\n \r\n What: top-of-atmosphere outgoing clear-sky longwave radiation; Material: null\r\n \r\n \r\n What: surface pressure; Material: null\r\n \r\n \r\n What: specific humidity; Material: null\r\n \r\n \r\n What: temperature tendency; Material: null\r\n \r\n \r\n What: snow water equivalent; Material: null\r\n \r\n \r\n What: surface temperature; Material: null\r\n \r\n \r\n What: wind speed; Material: null\r\n \r\n \r\n What: cloud cover; Material: null\r\n \r\n \r\n What: cloud cover; Material: null\r\n \r\n \r\n What: surface net upward clear-sky longwave radiation; Material: null\r\n \r\n \r\n What: top-of-atmosphere net downward shortwave radiation; Material: null\r\n \r\n \r\n What: large-scale snowfall; Material: null\r\n \r\n \r\n What: surface downward y stress; Material: null\r\n \r\n \r\n What: longitude; Material: null\r\n \r\n \r\n What: cloud liquid water mixing ratio; Material: null\r\n \r\n \r\n What: cloud cover; Material: null\r\n \r\n \r\n What: cloud cover; Material: null\r\n \r\n \r\n What: top-of-atmosphere net upward clear-sky longwave radiation; Material: null\r\n \r\n \r\n What: atmospheric boundary layer thickness; Material: null\r\n \r\n \r\n What: convective precipitation; Material: null\r\n \r\n \r\n What: convective snowfall; Material: null\r\n \r\n \r\n What: sea level pressure; Material: null\r\n \r\n \r\n What: sensible heat flux; Material: null\r\n \r\n \r\n What: snow depth; Material: null\r\n \r\n \r\n What: shortwave cloud radiative effect; Material: null\r\n \r\n \r\n What: northward wind speed; Material: null\r\n \r\n \r\n theme\r\n \r\n \r\n \r\n \r\n Paleoenvironmental Standard Terms (PaST) Thesaurus\r\n \r\n \r\n \r\n \r\n \r\n NOAA National Centers for Environmental Information\r\n \r\n \r\n \r\n \r\n \r\n \r\n https://www.ncei.noaa.gov/products/paleoclimatology/paleoenvironmental-standard-terms-thesaurus\r\n \r\n \r\n PaST Thesaurus\r\n \r\n \r\n information\r\n \r\n \r\n \r\n \r\n \r\n \r\n publisher\r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n Geographic Region > Global > Global > LATITUDE > LONGITUDE\r\n \r\n \r\n place\r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce\r\n \r\n \r\n dataCentre\r\n \r\n \r\n \r\n \r\n Global Change Master Directory (GCMD) Data Center Keywords\r\n \r\n \r\n \r\n \r\n 2020-01-09\r\n \r\n \r\n publication\r\n \r\n \r\n \r\n \r\n 9.1\r\n \r\n \r\n \r\n \r\n Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA)\r\n \r\n \r\n \r\n \r\n \r\n \r\n https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords\r\n \r\n \r\n GCMD Keyword Forum Page\r\n \r\n \r\n Global Change Master Directory (GCMD). 2024. GCMD Keywords, Version 19. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords\r\n \r\n \r\n information\r\n \r\n \r\n \r\n \r\n \r\n \r\n custodian\r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n otherRestrictions\r\n \r\n \r\n Cite as: Fiorella, R.P.; Sheldon, N.D. (2017-01-09): NOAA/WDS Paleoclimatology - Mesoproterozoic Global Climate Model Simulations. [indicate subset used]. NOAA National Centers for Environmental Information. https://doi.org/10.25921/hx02-rj03. Accessed [date].\r\n \r\n \r\n \r\n \r\n \r\n \r\n otherRestrictions\r\n \r\n \r\n Distribution liability: NOAA and NCEI make no warranty, expressed or implied, regarding these data, nor does the fact of distribution constitute such a warranty. NOAA and NCEI cannot assume liability for any damages caused by any errors or omissions in these data. If appropriate, NCEI can only certify that the data it distributes are an authentic copy of the records that were accepted for inclusion in the NCEI archives.\r\n \r\n \r\n \r\n \r\n \r\n \r\n otherRestrictions\r\n \r\n \r\n Use liability: NOAA and NCEI cannot provide any warranty as to the accuracy, reliability, or completeness of furnished data. Users assume responsibility to determine the usability of these data. The user is responsible for the results of any application of this data for other than its intended purpose.\r\n \r\n \r\n \r\n \r\n \r\n \r\n otherRestrictions\r\n \r\n \r\n None\r\n \r\n \r\n \r\n \r\n \r\n \r\n otherRestrictions\r\n \r\n \r\n Please cite original publication, online resource, dataset and publication DOIs (where available), and date accessed when using downloaded data. If there is no publication information, please cite investigator, title, online resource, and date accessed. The appearance of external links associated with a dataset does not constitute endorsement by the Department of Commerce/National Oceanic and Atmospheric Administration of external Web sites or the information, products or services contained therein. For other than authorized activities, the Department of Commerce/NOAA does not exercise any editorial control over the information you may find at these locations. These links are provided consistent with the stated purpose of this Department of Commerce/NOAA Web site.\r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n Equable end Mesoproterozoic climate in the absence of high CO2\r\n \r\n \r\n \r\n \r\n 2017\r\n \r\n \r\n publication\r\n \r\n \r\n \r\n \r\n \r\n \r\n Richard P. Fiorella and Nathan D. Sheldon\r\n \r\n \r\n author\r\n \r\n \r\n \r\n \r\n \r\n \r\n Geology\r\n \r\n \r\n publisher\r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n https://doi.org/10.1130/G38682.1\r\n \r\n \r\n HTTPS\r\n \r\n \r\n Web Browser\r\n \r\n \r\n Associated Reference published 2017\r\n \r\n \r\n Richard P. Fiorella and Nathan D. Sheldon, 2017: Equable end Mesoproterozoic climate in the absence of high CO2. Geology, 45, 231\u2013234, 10.1130/G38682.1\r\n \r\n \r\n information\r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n crossReference\r\n \r\n \r\n sciencePaper\r\n \r\n \r\n \r\n \r\n eng; USA\r\n \r\n \r\n geoscientificInformation\r\n \r\n \r\n \r\n \r\n Date Range: 1600000000 cal yr BP to 1000000000 cal yr BP;\r\n \r\n \r\n \r\n \r\n -180\r\n \r\n \r\n 180\r\n \r\n \r\n -90\r\n \r\n \r\n 90\r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n -1599998050\r\n -999998050\r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n STUDY NOTES: Climate model simulations for the Mesoproterozoic (1.6-1.0 billion years ago) using the NCAR CESM1.2 model (modified for Mesoproterozoic conditions). Model runs for atmospheric CO2 at ~1, 5, and 10 times pre-industrial levels, (pCO2 between 1400 and 2800 ppmv) and for pCH4 varying between 3.5 and 140 ppmv. Simulations suggest ice-free conditions could be maintained for 2800ppmv CO2 if CH4 was elevated to 140ppmv. \r\nABSTRACT SUPPLIED BY ORIGINATOR: The Proterozoic Eon (2500-542 Ma) appears to have been a warm period bookended by glaciations, despite a 5%-18% reduction in solar output compared to modern during this interval. Radiative-convective climate models suggest that glaciation could have been avoided if pCO2 were 30-300x preindustrial atmospheric levels (PIAL, 280 ppmv). Constraints from late Mesoproterozoic (ca. 1.2-1.0 Ga) microfossil calcification sheaths and paleosol mass balance, however, suggest that pCO2 may have been no higher than 10x PIAL. In the lower oxygen Mesoproterozoic atmosphere, an increased CH4 flux from methanogenic bacteria may have contributed additional greenhouse warming. We use a fully coupled atmosphere-ocean general circulation model (the U.S. National Center for Atmospheric Research Community Earth System Model, CESM) to test whether these pCO2 constraints are consistent with the absence of widespread glaciation inferred from the geologic record. We vary pCO2 and pCH4 between 1400 and 2800 ppmv and 3.5 and 140 ppmv, respectively, using a reconstructed 1.0 Ga paleogeography and solar output reduced by 9%. Our simulations suggest that ice-free conditions can be maintained at 10x PIAL CO2 when CH4 is 140 ppmv. When CH4 is lowered to 28 ppmv at 10x PIAL CO2, or if pCO2 is lowered to 5x PIAL, permanent land snow cover at high and middle latitudes suggests that glaciation would be more extensive than preindustrial conditions, but with warm tropical regions. Global glaciation occurs if pCO2 is reduced below 5x PIAL. Overall, our simulations suggest that an ice-free climate for the Mesoproterozoic (1.6-1.0 Ga) is consistent with the relatively low pCO2 implied from proxies if CH4 or other greenhouse gas concentrations were sufficiently elevated.\r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n NOAA National Centers for Environmental Information\r\n \r\n \r\n \r\n \r\n \r\n \r\n ncei.info@noaa.gov\r\n \r\n \r\n \r\n \r\n \r\n \r\n https://www.ncei.noaa.gov/contact\r\n \r\n \r\n NCEI Contact Information\r\n \r\n \r\n Information for contacts at NCEI.\r\n \r\n \r\n information\r\n \r\n \r\n \r\n \r\n \r\n \r\n distributor\r\n \r\n \r\n \r\n \r\n \r\n \r\n In most cases, electronic downloads of the data are free. However, fees may apply for custom orders, data certifications, copies of analog materials, and data distribution on physical media.\r\n \r\n \r\n Contact NCEI for other distribution options and instructions.\r\n \r\n \r\n \r\n \r\n \r\n \r\n Native Format(s)\r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n https://doi.org/10.25921/hx02-rj03\r\n \r\n \r\n HTTPS\r\n \r\n \r\n Landing Page\r\n \r\n \r\n Metadata Landing Page\r\n \r\n \r\n NCEI landing page with general information and links to access the data.\r\n \r\n \r\n information\r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n https://www.ncei.noaa.gov/access/paleo-search/study/20990\r\n \r\n \r\n HTTPS\r\n \r\n \r\n Web Browser\r\n \r\n \r\n NOAA Study Page\r\n \r\n \r\n Study page with data access information.\r\n \r\n \r\n search\r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n https://www.ncei.noaa.gov/products/paleoclimatology/paleoclimatology-modeling\r\n \r\n \r\n HTTPS\r\n \r\n \r\n Information\r\n \r\n \r\n NCEI Paleoclimatology Modeling Page\r\n \r\n \r\n General information for this data type.\r\n \r\n \r\n information\r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n https://www.ncei.noaa.gov/pub/data/paleo/gcmoutput/fiorella2017/readme-fiorella2017.txt\r\n \r\n \r\n HTTPS\r\n \r\n \r\n Download\r\n \r\n \r\n /gcmoutput/fiorella2017/readme-fiorella2017.txt\r\n \r\n \r\n Readme\r\n \r\n \r\n download\r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n https://www.ncei.noaa.gov/pub/data/paleo/gcmoutput/fiorella2017/\r\n \r\n \r\n HTTPS\r\n \r\n \r\n Download\r\n \r\n \r\n /gcmoutput/fiorella2017/\r\n \r\n \r\n Data Folder\r\n \r\n \r\n download\r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n asNeeded\r\n \r\n \r\n This ISO metadata record was translated from DIF metadata using dif-9x-to-iso-19115-2.xsl Version: 2022-06-21\r\n \r\n \r\n \r\n","source_transform":null,"status":"error"}