noaa-loess-5603 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 2024-11-27 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) NOAA/WDS Paleoclimatology - Kohfeld and Harrison 2001 Mid-continental USA Gridded Maps of Loess Thickness 2001-06-18 publication doi:10.25921/v12k-k977 noaa-loess-5603 NCEI DSI 1200_02 NCEI DSI 1200_01 Kohfeld, K.E. originator Kohfeld, K.E. author Harrison, S.P. originator Harrison, S.P. author Muhs, D.R. originator Muhs, D.R. 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 Loess and Eolian Dust. The data include parameters of loess and paleosol with a geographic location of North America. The time period coverage is from 34000 to 10000 in calendar years before present (BP). See metadata information for parameter and study location details. Please cite this study when using the data. Records of past environment derived from Loess and Eolian dust (silt-sized material deposited on the Earth surface by the surface winds. Parameter keywords describe what was measured in this dataset. 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-loess.png Paleoclimatology - Loess and Eolian Dust PNG Earth Science > Climate Indicators > Paleoclimate Indicators > Land Records > Loess Earth Science > Paleoclimate > Land Records > Loess 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 > loess and paleosol earth science > paleoclimate > loess and paleosol earth science > paleoclimate > loess and paleosol earth science > paleoclimate > loess and paleosol earth science > paleoclimate > loess 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: longitude; Material: null What: notes; Material: null What: latitude; Material: null What: layer thickness; Material: loess 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 Continent > North America > Peoria Loess > 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: Kohfeld, K.E.; Harrison, S.P.; Muhs, D.R. (2001-06-18): NOAA/WDS Paleoclimatology - Kohfeld and Harrison 2001 Mid-continental USA Gridded Maps of Loess Thickness. [indicate subset used]. NOAA National Centers for Environmental Information. https://doi.org/10.25921/v12k-k977. 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. DIRTMAP: The geologic record of dust 2001 publication Kohfeld, K.E., and S.P. Harrison author Earth-Science Reviews publisher https://doi.org/10.1016/S0012-8252(01)00042-3 HTTPS Web Browser Associated Reference published 2001 Kohfeld, K.E., and S.P. Harrison, 2001: DIRTMAP: The geologic record of dust. Earth-Science Reviews, 54, 81-114, 10.1016/S0012-8252(01)00042-3 information crossReference sciencePaper eng; USA geoscientificInformation Date Range: 34000 cal yr BP to 10000 cal yr BP; -102 -84 28 48 -32050 -8050 STUDY NOTES: Late Wisconsin (Peoria) Loess of the mid-continental USA represents the thickest deposition of last glacial loess, ranging from trace amounts (< 1 m) to accumulations as thick as 40-50 m in parts of western Nebraska and western Iowa. Accumulation of Peoria Loess coincides primarily with the last glacial period, although accumulation was not synchronous across the entire mid-continental region. The maximum-limiting of Peoria Loess range from approximately 30-34 ka (organic matter from the uppermost Roxana Silt and Gilman Canyon Formation) to 20-22 ka in other regions. The actual time period of deposition varies from region to region (see e.g. Muhs and Bettis, 2000; Bettis et al., submitted). Although a map of loess thickness across the mid-continental USA has been made (Thorp and Smith, 1952; republished in generalized form by Ruhe, 1983), this compilation is now more than 50 years old and has never been assembled as a digital data set, allowing for a representation of loess as a geomorphological feature that can be directly compared with regional model simulations over North America. The purpose of digitizing loess thickness is to provide this information as part of the DIRTMAP data base (Kohfeld and Harrison, 2001), to demonstrate spatial changes in accumulation across the mid-continental USA, and to make it available to the geomorphology, Quaternary and earth system modeling communities. ABSTRACT SUPPLIED BY ORIGINATOR: Atmospheric dust is an important feedback in the climate system, potentially affecting the radiative balance and chemical composition of the atmosphere and providing nutrients to terrestrial and marine ecosystems. Yet the potential impact of dust on the climate system, both in the anthropogenically disturbed future and the naturally varying past, remains to be quantified. The geologic record of dust provides the opportunity to test earth system models designed to simulate dust. Records of dust can be obtained from ice cores, marine sediments, and terrestrial (loess) deposits. Although rarely unequivocal, these records document a variety of processes (source, transport and deposition) in the dust cycle, stored in each archive as changes in clay mineralogy, isotopes, grain size, and concentration of terrigenous materials. Although the extraction of information from each type of archive is slightly different, the basic controls on these dust indicators are the same. Changes in the dust flux and particle size might be controlled by a combination of (a) source area extent, (b) dust emission efficiency (wind speed) and atmospheric transport, (c) atmospheric residence time of dust, and/or (d) relative contributions of dry settling and rainout of dust. Similarly, changes in mineralogy reflect (a) source area mineralogy and weathering and (b) shifts in atmospheric transport. The combination of these geological data with process-based, forward-modelling schemes in global earth system models provides an excellent means of achieving a comprehensive picture of the global pattern of dust accumulation rates, their controlling mechanisms, and how those mechanisms may vary regionally. The Dust Indicators and Records of Terrestrial and MArine Palaeoenvironments (DIRTMAP) data base has been established to provide a global palaeoenvironmental data set that can be used to validate earth system model simulations of the dust cycle over the past 150,000 years. 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Native Format(s) https://doi.org/10.25921/v12k-k977 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/5603 HTTPS Web Browser NOAA Study Page Study page with data access information. search https://www.ncei.noaa.gov/products/paleoclimatology/loess-eolian-dust HTTPS Information NCEI Loess and Eolian Dust Page General information for this data type. information https://www.ncei.noaa.gov/pub/data/paleo/loess/peoria/table2_data.xls HTTPS Download NCEI Direct Download Direct download links for dataset files. download https://www.ncei.noaa.gov/pub/data/paleo/loess/peoria/table2_data.txt HTTPS Download NCEI Direct Download Direct download links for dataset files. download https://www.ncei.noaa.gov/pub/data/paleo/loess/peoria/table1_codes.xls HTTPS Download NCEI Direct Download Direct download links for dataset files. download https://www.ncei.noaa.gov/pub/data/paleo/loess/peoria/table1_codes.txt HTTPS Download NCEI Direct Download Direct download links for dataset files. download https://www.ncei.noaa.gov/pub/data/paleo/loess/peoria/readme_kohfeld2001.txt HTTPS Download /loess/peoria/readme_kohfeld2001.txt Readme download asNeeded This ISO metadata record was translated from DIF metadata using dif-9x-to-iso-19115-2.xsl Version: 2022-06-21