noaa-model-20990 eng; USA utf8 dataset Bauer, Bruce DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce +1 303-497-6280 +1 303-497-6513 325 Broadway, E/CC23 Boulder CO 80305-3328 USA paleo@noaa.gov pointOfContact 2018-12-11 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) NOAA/WDS Paleoclimatology - Mesoproterozoic Global Climate Model Simulations 2017-01-09 publication noaa-model-20990 NCEI DSI 1200_01 Fiorella, R.P. originator Fiorella, R.P. author Sheldon, N.D. originator Sheldon, N.D. author NOAA National Centers for Environmental Information publisher tableDigital 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. 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. completed Bauer, Bruce DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce +1 303-497-6280 +1 303-497-6513 325 Broadway, E/CC23 Boulder CO 80305-3328 USA paleo@noaa.gov pointOfContact https://www.ncdc.noaa.gov/c/images/pc-default-model.png Paleoclimatology - Modeling PNG Earth Science > Climate Indicators > Paleoclimate Indicators > Paleoclimate Reconstructions theme Global Change Master Directory (GCMD) Science Keywords 2018 revision Version 8.6 Global Change Data Center, Science and Exploration Directorate, Goddard Space Flight Center (GSFC) National Aeronautics and Space Administration (NASA) https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords HTTPS Web Browser Global Change Master Directory (GCMD) Keywords The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords. information publisher earth science > paleoclimate > paleoclimatic modeling earth science > paleoclimate > paleoclimatic modeling earth science > paleoclimate > paleoclimatic modeling earth science > paleoclimate > paleoclimatic modeling earth science > paleoclimate > paleoclimatic modeling earth science > paleoclimate > paleoclimatic modeling earth science > paleoclimate > paleoclimatic modeling earth science > paleoclimate > paleoclimatic modeling earth science > paleoclimate > paleoclimatic modeling earth science > paleoclimate > paleoclimatic modeling earth science > paleoclimate > paleoclimatic modeling earth science > paleoclimate > paleoclimatic modeling earth science > paleoclimate > paleoclimatic modeling earth science > paleoclimate > paleoclimatic modeling earth science > paleoclimate > paleoclimatic modeling earth science > paleoclimate > paleoclimatic modeling earth science > paleoclimate > paleoclimatic modeling earth science > paleoclimate > paleoclimatic modeling earth science > paleoclimate > paleoclimatic modeling earth science > paleoclimate > paleoclimatic modeling earth science > paleoclimate > paleoclimatic modeling earth science > paleoclimate > paleoclimatic modeling earth science > paleoclimate > paleoclimatic modeling earth science > paleoclimate > paleoclimatic modeling earth science > paleoclimate > paleoclimatic modeling earth science > paleoclimate > paleoclimatic modeling earth science > paleoclimate > paleoclimatic modeling earth science > paleoclimate > paleoclimatic modeling earth science > paleoclimate > paleoclimatic modeling earth science > paleoclimate > paleoclimatic modeling earth science > paleoclimate > paleoclimatic modeling earth science > paleoclimate > paleoclimatic modeling earth science > paleoclimate > paleoclimatic modeling earth science > paleoclimate > paleoclimatic modeling earth science > paleoclimate > paleoclimatic modeling earth science > paleoclimate > paleoclimatic modeling earth science > paleoclimate > paleoclimatic modeling earth science > paleoclimate > paleoclimatic modeling earth science > paleoclimate > paleoclimatic modeling earth science > paleoclimate > paleoclimatic modeling earth science > paleoclimate > paleoclimatic modeling earth science > paleoclimate > paleoclimatic modeling earth science > paleoclimate > paleoclimatic modeling earth science > paleoclimate > paleoclimatic modeling earth science > paleoclimate > paleoclimatic modeling earth science > paleoclimate > paleoclimatic modeling earth science > paleoclimate > paleoclimatic modeling earth science > paleoclimate > paleoclimatic modeling earth science > paleoclimate > paleoclimatic modeling earth science > paleoclimate > paleoclimatic modeling earth science > paleoclimate > paleoclimatic modeling earth science > paleoclimate > paleoclimatic modeling earth science > paleoclimate > paleoclimatic modeling earth science > paleoclimate > paleoclimatic modeling earth science > paleoclimate > paleoclimatic modeling earth science > paleoclimate > paleoclimatic modeling earth science > paleoclimate > paleoclimatic modeling earth science > paleoclimate > paleoclimatic modeling earth science > paleoclimate > paleoclimatic modeling earth science > paleoclimate > paleoclimatic modeling earth science > paleoclimate > paleoclimatic modeling earth science > paleoclimate > paleoclimatic modeling earth science > paleoclimate > paleoclimatic modeling earth science > paleoclimate > paleoclimatic modeling earth science > paleoclimate > paleoclimatic modeling earth science > paleoclimate > paleoclimatic modeling earth science > paleoclimate > paleoclimatic modeling earth science > paleoclimate > paleoclimatic modeling earth science > paleoclimate > paleoclimatic modeling earth science > paleoclimate > paleoclimatic modeling earth science > paleoclimate > paleoclimatic modeling earth science > paleoclimate > paleoclimatic modeling earth science > paleoclimate > paleoclimatic modeling earth science > paleoclimate > paleoclimatic modeling earth science > paleoclimate > model > atmosphere model theme Global Change Master Directory (GCMD) Science Keywords 2018 revision Version 8.6 Global Change Data Center, Science and Exploration Directorate, Goddard Space Flight Center (GSFC) National Aeronautics and Space Administration (NASA) https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords HTTPS Web Browser Global Change Master Directory (GCMD) Keywords The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords. information publisher Geographic Region > Global> Global > LATITUDE > LONGITUDE place otherRestrictions 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://www.ncdc.noaa.gov/paleo/study/20990. Accessed [date]. otherRestrictions 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. otherRestrictions 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. otherRestrictions None otherRestrictions 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. Equable end Mesoproterozoic climate in the absence of high CO2 2017 publication Richard P. Fiorella and Nathan D. Sheldon author Geology publisher https://doi.org/10.1130/G38682.1 HTTPS Web Browser Associated Reference published 2017 Richard P. Fiorella and Nathan D. Sheldon, 2017: Equable end Mesoproterozoic climate in the absence of high CO2. Geology, , , 10.1130/G38682.1 information crossReference sciencePaper eng; USA geoscientificInformation Date Range: 1600000000 cal yr BP to 1000000000 cal yr BP; -180 180 -90 90 -1599998050 -999998050 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. ABSTRACT 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. 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Native Format(s) https://data.nodc.noaa.gov/cgi-bin/iso?id=noaa-model-20990 HTTPS Landing Page NCEI landing page for this dataset Dataset landing page with general information and links to access the data. information https://www.ncdc.noaa.gov/paleo/study/20990 HTTPS Web Browser NCEI Study Page Study page with dataset access information. search https://www.ncdc.noaa.gov/data-access/paleoclimatology-data/datasets/paleoclimatology-modeling HTTPS Information NCEI Paleoclimatology Modeling Page General information for this data type. information https://www1.ncdc.noaa.gov/pub/data/paleo/gcmoutput/fiorella2017/ HTTPS Download /gcmoutput/fiorella2017/ Data Folder download https://www1.ncdc.noaa.gov/pub/data/paleo/gcmoutput/fiorella2017/readme-fiorella2017.txt HTTPS Download /gcmoutput/fiorella2017/readme-fiorella2017.txt Readme download asNeeded This metadata record was translated from DIF using dif-9x-to-iso-19115-2.xsl Version: 2018-10-25