noaa-model-16276 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 2025-04-24 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) NOAA/WDS Paleoclimatology - North Atlantic Freshwater Forcing Model Data at 8.2ka 2014-03-24 publication doi:10.25921/613t-gr84 noaa-model-16276 NCEI DSI 1200_02 NCEI DSI 1200_01 Morrill, C. originator Morrill, C. author LeGrande, A.N. originator LeGrande, A.N. author Renssen, H. originator Renssen, H. author Bakker, P. originator Bakker, P. author Otto-Bliesner, B.L. originator Otto-Bliesner, B.L. 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 Unavailable begin date to Unavailable end date 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 > model > atmosphere model earth science > paleoclimate > model > ocean 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 abrupt climate change theme What: meridional overturning streamfunction; Material: null What: surface air temperature; Material: null What: sea surface temperature; Material: null What: precipitation; Material: null What: surface air temperature; Material: null What: sea surface salinity; Material: null What: sea ice cover; Material: null What: precipitation; Material: null What: latitude; Material: null What: longitude; 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: Morrill, C.; LeGrande, A.N.; Renssen, H.; Bakker, P.; Otto-Bliesner, B.L. (2014-03-24): NOAA/WDS Paleoclimatology - North Atlantic Freshwater Forcing Model Data at 8.2ka. [indicate subset used]. NOAA National Centers for Environmental Information. https://doi.org/10.25921/613t-gr84. 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. Model sensitivity to North Atlantic freshwater forcing at 8.2ka 2013 publication Morrill, C., A.N. LeGrande, H. Renssen, P. Bakker, and B.L. Otto-Bliesner author Climate of the Past publisher https://doi.org/10.5194/cp-9-955-2013 HTTPS Web Browser Associated Reference published 2013 Morrill, C., A.N. LeGrande, H. Renssen, P. Bakker, and B.L. Otto-Bliesner, 2013: Model sensitivity to North Atlantic freshwater forcing at 8.2ka. Climate of the Past, 9, 955-968, 10.5194/cp-9-955-2013 information crossReference sciencePaper eng; USA geoscientificInformation Paleo date information not available. -180 180 -90 90 1950 STUDY NOTES: File names generally follow CMIP5/PMIP3 conventions, using the following abbreviations: Omon = ocean variables at monthly resolution (sea surface temperature, sea surface salinity, sea ice area percent) Oyr = ocean variables at annual resolution (meridional overturning streamfunction) Amon = atmosphere variables at monthly resolution (near surface air temperature, precipitation) Ayr = atmosphere variables at annual resolution (near surface air temperature, precipitation) ehControl = Early Holocene (8.5 ka) control simulation ehMWP = Early Holocene meltwater pulse experiment piControl = PreIndustrial control simulation piMWP = PreIndustrial meltwater pulse experiment r<N>i<M>p<L> = Ensemble member designation, with N representing realization number, M representing initial condition method, and L representing "perturbed physics" number Note that GISS Model-E-R output are provided as multi-decadal or decadal averages of either monthly (Omon, Amon) or annual (Oyr) means. Multi-decadal (30-year) averages are provided for the control simulation and decadal (10-year) averages for the meltwater pulse experiment. Also, please note that anomalies for the GISS Model-E-R must be calculated as the 10-yr mean of the MWP experiment less the 30-yr mean of the closest control years. See provided ncl scripts (fig1_Morrill_etal_2013.ncl, etc) for more details on how to calculate GISS Model-E-R anomalies. DATA FILE LIST (sizes in MB and names) 0.1 8ka-precip-ensemble.nc 0.1 8ka-temp-ensemble.nc 68.9 CCSM_Amon_ehControl_r1i1p1.nc 69.0 CCSM_Amon_ehControl_r1i2p1.nc 34.5 CCSM_Amon_ehMWP_r1i1p1.nc 69.0 CCSM_Amon_ehMWP_r1i2p1.nc 851.5 CCSM_Omon_ehControl_r1i1p1.nc 853.7 CCSM_Omon_ehControl_r1i2p1.nc 426.7 CCSM_Omon_ehMWP_r1i1p1.nc 427.4 CCSM_Omon_ehMWP_r1i2p1.nc 15.0 CCSM_Oyr_ehControl_r1i1p1.nc 20.0 CCSM_Oyr_ehControl_r1i2p1.nc 5.0 CCSM_Oyr_ehMWP_r1i1p1.nc 10.0 CCSM_Oyr_ehMWP_r1i2p1.nc 6.1 GISS-E-R_Amon_piControl_r1i1p1.nc 5.5 GISS-E-R_Amon_piMWP_r1i1p1.nc 4.4 GISS-E-R_Omon_piControl_r1i1p1.nc 4.0 GISS-E-R_Omon_piMWP_r1i1p1.nc 0.3 GISS-E-R_Oyr_piControl_r1i1p1.nc 0.3 GISS-E-R_Oyr_piMWP_r1i1p1.nc 8.3 LOVECLIM_Ayr_ehControl_r1i1p1.nc 8.3 LOVECLIM_Ayr_ehMWP_r1i1p1.nc 350.5 LOVECLIM_Omon_ehControl_r1i1p1.nc 350.9 LOVECLIM_Omon_ehMWP_r1i1p1.nc 1.4 LOVECLIM_Oyr_ehControl_r1i1p1.nc 1.4 LOVECLIM_Oyr_ehMWP_r1i1p1.nc ABSTRACT SUPPLIED BY ORIGINATOR: We compared four simulations of the 8.2 ka event to assess climate model sensitivity and skill in responding to North Atlantic freshwater perturbations. All of the simulations used the same freshwater forcing, 2.5 Sv for one year, applied to either the Hudson Bay (northeastern Canada) or Labrador Sea (between Canada's Labrador coast and Greenland). This freshwater pulse induced a decadal-mean slowdown of 10–25% in the Atlantic Meridional Overturning Circulation (AMOC) of the models and caused a large-scale pattern of climate anomalies that matched proxy evidence for cooling in the Northern Hemisphere and a southward shift of the Intertropical Convergence Zone. The multi-model ensemble generated temperature anomalies that were just half as large as those from quantitative proxy reconstructions, however. Also, the duration of AMOC and climate anomalies in three of the simulations was only several decades, significantly shorter than the duration of ~150 yr in the paleoclimate record. Possible reasons for these discrepancies include incorrect representation of the early Holocene climate and ocean state in the North Atlantic and uncertainties in the freshwater forcing estimates. 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/10.25921/613t-gr84 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/16276 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/morrill2013/ncl-scripts/ HTTPS Download /gcmoutput/morrill2013/ncl-scripts/ Data Folder download https://www.ncei.noaa.gov/pub/data/paleo/gcmoutput/morrill2013/morrill2013-readme.txt HTTPS Download /gcmoutput/morrill2013/morrill2013-readme.txt Readme download https://www.ncei.noaa.gov/pub/data/paleo/gcmoutput/morrill2013/ HTTPS Download /gcmoutput/morrill2013/ Data Folder download asNeeded This ISO metadata record was translated from DIF metadata using dif-9x-to-iso-19115-2.xsl Version: 2022-06-21