noaa-model-13440 eng; USA utf8 dataset NOAA National Centers for Environmental Information ncei.info@noaa.gov https://www.ncei.noaa.gov/contact NCEI Contact Information Information for contacts at NCEI. information pointOfContact NOAA World Data Service for Paleoclimatology Data Center Contact 828-271-4800 303-497-6513 325 Broadway, E/NE31 Boulder CO 80305-3328 USA paleo@noaa.gov pointOfContact 2024-04-04 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) NOAA/WDS Paleoclimatology - Model Simulations of Orbital Sensitivity of North American Ice Sheets 2012-10-24 publication doi:10.25921/a91n-x654 noaa-model-13440 NCEI DSI 1200_02 NCEI DSI 1200_01 Pollard, D. originator Pollard, D. author DeConto, R.M. originator DeConto, R.M. 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 200000 to 0 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 NOAA National Centers for Environmental Information ncei.info@noaa.gov https://www.ncei.noaa.gov/contact NCEI Contact Information Information for contacts at NCEI. information pointOfContact NOAA World Data Service for Paleoclimatology Data Center Contact 828-271-4800 303-497-6513 325 Broadway, E/NE31 Boulder CO 80305-3328 USA paleo@noaa.gov pointOfContact https://www.ncei.noaa.gov/pub/data/paleo/webimages/pc-default-model.png Paleoclimatology - Modeling PNG Earth Science > Climate Indicators > Paleoclimate Indicators > Paleoclimate Reconstructions theme Global Change Master Directory (GCMD) Science Keywords 2025 revision 22 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 22. 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 information custodian 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 > other model theme Global Change Master Directory (GCMD) Science Keywords 2025 revision 22 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 22. 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 information custodian What: upward ice sheet velocity; Material: null What: ice calving; Material: null What: bedrock elevation; Material: null What: ice temperature; Material: null What: ice sheet elevation; Material: null What: ice sheet y velocity; Material: null What: snowfall; Material: null What: ice melt; Material: null What: ice temperature; Material: null What: age; Material: null What: ice sheet area; Material: null What: ice melt; Material: null What: ice sheet y velocity; Material: null What: ice sheet y velocity; Material: null What: ice sheet area; Material: null What: ice temperature; Material: null What: ice sheet x velocity; Material: null What: latitude; Material: null What: ice sheet volume; Material: null What: ice sheet volume; Material: null What: bedrock elevation; Material: null What: upward ice sheet velocity; Material: null What: ice melt; Material: null What: ice sheet volume; Material: null What: sea level; Material: null What: ice sheet area; Material: null What: bedrock elevation; Material: null What: surface type; Material: null What: ice sheet x velocity; Material: null What: longitude; Material: null What: ice sheet thickness; Material: null What: rainfall; Material: null What: ice sheet x velocity; Material: null What: notes; Material: null theme Paleoenvironmental Standard Terms (PaST) Thesaurus NOAA National Centers for Environmental Information https://www.ncei.noaa.gov/products/paleoclimatology/paleoenvironmental-standard-terms-thesaurus PaST Thesaurus information publisher Geographic Region > Global > Global > LATITUDE > LONGITUDE place DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce dataCentre Global Change Master Directory (GCMD) Data Center Keywords 2025 revision 22 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 22. 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 information custodian otherRestrictions Cite as: Pollard, D.; DeConto, R.M. (2012-10-24): NOAA/WDS Paleoclimatology - Model Simulations of Orbital Sensitivity of North American Ice Sheets. [indicate subset used]. NOAA National Centers for Environmental Information. https://doi.org/10.25921/a91n-x654. 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. Description of a hybrid ice sheet-shelf model, and application to Antarctica 2012 publication Pollard, D. and R.M. DeConto author Geoscientific Model Development publisher https://doi.org/10.5194/gmd-5-1273-2012 HTTPS Web Browser Associated Reference published 2012 Pollard, D. and R.M. DeConto, 2012: Description of a hybrid ice sheet-shelf model, and application to Antarctica. Geoscientific Model Development, 5, 1273-1295, 10.5194/gmd-5-1273-2012 information crossReference sciencePaper eng; USA geoscientificInformation Date Range: 200000 cal yr BP to 0 cal yr BP; -180 180 -90 90 -198050 1950 STUDY NOTES: Snapshots of a 3-D ice sheet model (Pollard and DeConto, 2012) applied over North America and Greenland, driven either by simply parameterized climate (similarly to Pollard and DeConto, 2009), or by a look-up table of previous Global Climate Model (GCM) solutions (similarly to DeConto and Pollard, 2003), with idealized 40,000-yr sinusoidal climate variations. Main model variables of interest are: h = ice sheet thickness (m) hs = surface elevation (m) hb = bedrock elevation (m) maskwater = 0 for land or grounded ice, 1 for ocean or floating ice. Latitudes of grid points: Every 0.5 degrees, from 20.5 N to 84.5 N (130 points). Longitudes of grid points: Every 1.0 degrees, from 179.5 W to -10.5 W (170 points). Time period: Model integrations of up to 200,000 years, representing idealized orbital forcing with 40,000 year periodicity. Variables are saved every 2000 years, from 0 up to 200000 yr (up to 101 saves). Each NetCDF file contains results for one model experiment, named as follows: fort.92_cyca to fort.92_cych.nc: Using parameterized climate forcing, each with slightly different climate parameters. fort.92_gcmcyc1.nc to fort.92_gcmcyc5.nc: Using GCM lookup-table forcing, each with slightly different look-up parameters, mainly albedo feedback strength. ADDITIONAL REFERENCE: DeConto, R.M. and D. Pollard. 2003. Rapid Cenozoic glaciation of Antarctica induced by declining atmospheric CO2. Nature, 421, 245-249. ADDITIONAL REFERENCE: Pollard, D. and R.M. DeConto. 2009. Modelling West Antarctic ice sheet growth and collapse through the past five million years. Nature, 458, 329-332 ABSTRACT SUPPLIED BY ORIGINATOR: The formulation of a 3-D ice sheet-shelf model is described. The model is designed for long-term continental-scale applications, and has been used mostly in paleoclimatic studies. It uses a hybrid combination of the scaled shallow ice and shallow shelf approximations for ice flow. Floating ice shelves and grounding-line migration are included, with parameterized ice fluxes at grounding lines that allows relatively coarse resolutions to be used. All significant components and parameterizations of the model are described in some detail. Basic results for modern Antarctica are compared with observations, and simulations over the last 5 million years are compared with previously published results. The sensitivity of ice volumes during the last deglaciation to basal sliding coefficients is discussed. NOAA National Centers for Environmental Information ncei.info@noaa.gov https://www.ncei.noaa.gov/contact NCEI Contact Information Information for contacts at NCEI. information distributor 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. Contact NCEI for other distribution options and instructions. Native Format(s) https://doi.org/10.25921/a91n-x654 HTTPS Landing Page Metadata Landing Page NCEI landing page with general information and links to access the data. information https://www.ncei.noaa.gov/access/paleo-search/study/13440 HTTPS Web Browser NOAA Study Page Study page with data access information. search https://www.ncei.noaa.gov/products/paleoclimatology/paleoclimatology-modeling HTTPS Information NCEI Paleoclimatology Modeling Page General information for this data type. information https://www.ncei.noaa.gov/pub/data/paleo/gcmoutput/pollard2012/pollard2012icesheets.txt HTTPS Download NCEI Direct Download Direct download links for dataset files. download https://www.ncei.noaa.gov/pub/data/paleo/gcmoutput/pollard2012/fort.92_gcmcyc5.nc HTTPS Download NCEI Direct Download Direct download links for dataset files. download https://www.ncei.noaa.gov/pub/data/paleo/gcmoutput/pollard2012/fort.92_gcmcyc4.nc HTTPS Download NCEI Direct Download Direct download links for dataset files. download https://www.ncei.noaa.gov/pub/data/paleo/gcmoutput/pollard2012/fort.92_gcmcyc3.nc HTTPS Download NCEI Direct Download Direct download links for dataset files. download https://www.ncei.noaa.gov/pub/data/paleo/gcmoutput/pollard2012/fort.92_gcmcyc2.nc HTTPS Download NCEI Direct Download Direct download links for dataset files. download https://www.ncei.noaa.gov/pub/data/paleo/gcmoutput/pollard2012/fort.92_gcmcyc1.nc HTTPS Download NCEI Direct Download Direct download links for dataset files. download https://www.ncei.noaa.gov/pub/data/paleo/gcmoutput/pollard2012/fort.92_cycj.nc HTTPS Download NCEI Direct Download Direct download links for dataset files. download https://www.ncei.noaa.gov/pub/data/paleo/gcmoutput/pollard2012/fort.92_cyci.nc HTTPS Download NCEI Direct Download Direct download links for dataset files. download https://www.ncei.noaa.gov/pub/data/paleo/gcmoutput/pollard2012/fort.92_cych.nc HTTPS Download NCEI Direct Download Direct download links for dataset files. download https://www.ncei.noaa.gov/pub/data/paleo/gcmoutput/pollard2012/fort.92_cycg.nc HTTPS Download NCEI Direct Download Direct download links for dataset files. download https://www.ncei.noaa.gov/pub/data/paleo/gcmoutput/pollard2012/fort.92_cycf.nc HTTPS Download NCEI Direct Download Direct download links for dataset files. download https://www.ncei.noaa.gov/pub/data/paleo/gcmoutput/pollard2012/fort.92_cyce.nc HTTPS Download NCEI Direct Download Direct download links for dataset files. download https://www.ncei.noaa.gov/pub/data/paleo/gcmoutput/pollard2012/fort.92_cycd.nc HTTPS Download NCEI Direct Download Direct download links for dataset files. download https://www.ncei.noaa.gov/pub/data/paleo/gcmoutput/pollard2012/fort.92_cycc.nc HTTPS Download NCEI Direct Download Direct download links for dataset files. download https://www.ncei.noaa.gov/pub/data/paleo/gcmoutput/pollard2012/fort.92_cycb.nc HTTPS Download NCEI Direct Download Direct download links for dataset files. download https://www.ncei.noaa.gov/pub/data/paleo/gcmoutput/pollard2012/fort.92_cyca.nc HTTPS Download NCEI Direct Download Direct download links for dataset files. download asNeeded This ISO metadata record was translated from DIF metadata using dif-9x-to-iso-19115-2.xsl Version: 2022-06-21