noaa-lake-31972 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 2024-04-03 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) NOAA/WDS Paleoclimatology - Searles Valley, California Latest Pleistocene Plant Wax and Salinity Data and Modern Plant Wax Data 2021-04-01 publication doi:10.25921/410y-ep42 noaa-lake-31972 NCEI DSI 1200_02 NCEI DSI 1200_01 Peaple, M.D. originator Peaple, M.D. author Tierney, J.E. originator Tierney, J.E. author McGee, D. originator McGee, D. author Lowenstein, T.K. originator Lowenstein, T.K. author Bhattacharya, T. originator Bhattacharya, T. author Feakins, S.J. originator Feakins, S.J. 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 Lake. The data include parameters of paleolimnology with a geographic location of California, United States Of America. The time period coverage is from 200000 to -65 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 climate and environment derived from lake sediment records. 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-lake.png Paleoclimatology - Lake PNG Earth Science > Climate Indicators > Paleoclimate Indicators > Ocean/Lake Records 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 > paleolimnology earth science > paleoclimate > paleolimnology earth science > paleoclimate > paleolimnology earth science > paleoclimate > paleolimnology earth science > paleoclimate > paleolimnology earth science > paleoclimate > paleolimnology earth science > paleoclimate > paleolimnology earth science > paleoclimate > paleolimnology earth science > paleoclimate > paleolimnology earth science > paleoclimate > paleolimnology earth science > paleoclimate > paleolimnology earth science > paleoclimate > paleolimnology earth science > paleoclimate > paleolimnology earth science > paleoclimate > paleolimnology earth science > paleoclimate > paleolimnology earth science > paleoclimate > paleolimnology earth science > paleoclimate > paleolimnology earth science > paleoclimate > paleolimnology earth science > paleoclimate > paleolimnology earth science 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earth science > paleoclimate > paleolimnology earth science > paleoclimate > paleolimnology earth science > paleoclimate > paleolimnology earth science > paleoclimate > paleolimnology earth science > paleoclimate > paleolimnology earth science > paleoclimate > paleolimnology earth science > paleoclimate > paleolimnology earth science > paleoclimate > paleolimnology earth science > paleoclimate > paleolimnology > geochemistry 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: notes; Material: null What: C33 n-alkane; Material: sediment What: C25 n-alkanoic acid; Material: sediment What: C28 n-alkanoic acid; Material: sediment What: C23 n-alkanoic acid; Material: sediment What: C27 n-alkanoic acid; Material: sediment What: carbon preference index; Material: n-alkane What: collection elevation; Material: null What: C29 n-alkane; Material: organic matter What: C34 n-alkane; Material: organic matter What: C27 n-alkanoic acid; Material: organic matter What: C29 n-alkanoic acid; Material: organic matter What: n-alkanoic acid; Material: organic matter What: n-alkane; Material: organic matter What: C25 n-alkane; Material: sediment What: C28 n-alkane; Material: sediment What: C31 n-alkane; Material: sediment What: C25 n-alkanoic acid; Material: sediment What: C30 n-alkane; Material: organic matter What: C28 n-alkane; Material: organic matter What: C28 n-alkanoic acid; Material: organic matter What: notes; Material: null What: C34 n-alkane; Material: sediment What: C23 n-alkane; Material: sediment What: C29 n-alkane; Material: sediment What: C32 n-alkane; Material: sediment What: C24 n-alkanoic acid; Material: sediment What: C26 n-alkanoic acid; Material: sediment What: C32 n-alkanoic acid; Material: sediment What: notes; Material: null What: longitude; Material: null What: C25 n-alkane; Material: organic matter What: C32 n-alkane; Material: organic matter What: C34 n-alkane; Material: organic matter What: C26 n-alkanoic acid; Material: organic matter What: C30 n-alkanoic acid; Material: organic matter What: C24 n-alkane; Material: organic matter What: C24 n-alkane; Material: sediment What: C25 n-alkane; Material: sediment What: C28 n-alkane; Material: sediment What: C29 n-alkane; Material: sediment What: C35 n-alkane; Material: sediment What: C22 n-alkanoic acid; Material: sediment What: C31 n-alkanoic acid; Material: sediment What: C22 n-alkanoic acid; Material: sediment What: C30 n-alkanoic acid; Material: sediment What: C31 n-alkanoic acid; Material: sediment What: n-alkane; Material: sediment What: latitude; Material: null What: C33 n-alkane; Material: organic matter What: C35 n-alkane; Material: organic matter What: C23 n-alkane; Material: organic matter What: C30 n-alkane; Material: organic matter What: C31 n-alkane; Material: organic matter What: C33 n-alkane; Material: organic matter What: C22 n-alkanoic acid; Material: organic matter What: C24 n-alkanoic acid; Material: organic matter What: C26 n-alkanoic acid; Material: organic matter What: C31 n-alkanoic acid; Material: organic matter What: notes; Material: null What: notes; Material: null What: C23 n-alkane; Material: sediment What: C35 n-alkane; Material: sediment What: C27 n-alkane; Material: sediment What: C30 n-alkane; Material: sediment What: C23 n-alkanoic acid; Material: sediment What: C29 n-alkanoic acid; Material: sediment What: n-alkanoic acid; Material: sediment What: archaeol caldarchaeol ecometric; Material: null What: C31 n-alkane; Material: organic matter What: C24 n-alkane; Material: organic matter What: C35 n-alkane; Material: organic matter What: C25 n-alkanoic acid; Material: organic matter What: C30 n-alkanoic acid; Material: organic matter What: C32 n-alkanoic acid; Material: organic matter What: C30 n-alkane; Material: sediment What: C32 n-alkane; Material: sediment What: C33 n-alkane; Material: sediment What: C34 n-alkane; Material: sediment What: C29 n-alkanoic acid; Material: sediment What: average chain length; Material: n-alkane What: C25 n-alkane; Material: organic matter What: C26 n-alkane; Material: organic matter What: C32 n-alkane; Material: organic matter What: C24 n-alkanoic acid; Material: organic matter What: C27 n-alkanoic acid; Material: organic matter What: C29 n-alkanoic acid; Material: organic matter What: C31 n-alkanoic acid; Material: organic matter What: depth; Material: null What: C27 n-alkane; Material: sediment What: C31 n-alkane; Material: sediment What: C30 n-alkanoic acid; Material: sediment What: C26 n-alkanoic acid; Material: sediment What: C28 n-alkanoic acid; Material: sediment What: carbon preference index; Material: n-alkane What: C23 n-alkane; Material: organic matter What: C26 n-alkane; Material: organic matter What: C28 n-alkane; Material: organic matter What: C29 n-alkane; Material: organic matter What: C28 n-alkanoic acid; Material: organic matter What: C22 n-alkanoic acid; Material: organic matter What: C26 n-alkane; Material: sediment What: C24 n-alkane; Material: sediment What: C26 n-alkane; Material: sediment What: C27 n-alkanoic acid; Material: sediment What: C32 n-alkanoic acid; Material: sediment What: C24 n-alkanoic acid; Material: sediment What: average chain length; Material: n-alkane What: C27 n-alkane; Material: organic matter What: C27 n-alkane; Material: organic matter What: C23 n-alkanoic acid; Material: organic matter What: C25 n-alkanoic acid; Material: organic matter What: C32 n-alkanoic acid; Material: organic matter What: C23 n-alkanoic acid; Material: organic matter 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 > United States Of America > California > Searles Valley > LATITUDE 35.707579 > LONGITUDE -117.312931 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: Peaple, M.D.; Tierney, J.E.; McGee, D.; Lowenstein, T.K.; Bhattacharya, T.; Feakins, S.J. (2021-04-01): NOAA/WDS Paleoclimatology - Searles Valley, California Latest Pleistocene Plant Wax and Salinity Data and Modern Plant Wax Data. [indicate subset used]. NOAA National Centers for Environmental Information. https://doi.org/10.25921/410y-ep42. 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. Identifying plant wax inputs in lake sediments using machine learning 2021 publication Mark D. Peaple, Jessica E. Tierney, David McGee, Tim K. Lowenstein, Tripti Bhattacharya, Sarah J. Feakins author Organic Geochemistry publisher https://doi.org/10.1016/j.orggeochem.2021.104222 HTTPS Web Browser Associated Reference published 2021 Mark D. Peaple, Jessica E. Tierney, David McGee, Tim K. Lowenstein, Tripti Bhattacharya, Sarah J. Feakins, 2021: Identifying plant wax inputs in lake sediments using machine learning. Organic Geochemistry, 156, , 10.1016/j.orggeochem.2021.104222 information crossReference sciencePaper eng; USA geoscientificInformation Date Range: 200000 cal yr BP to -65 cal yr BP; -117.312931 -117.312931 35.707579 35.707579 Study Coordinates 35.707579 -117.312931 -198050 2015 STUDY NOTES: Lake sediment and modern plant wax data (n-alkanes and n-alkanoic acids), and Archeol Caldarcheol Ecometric salinity indicator, from Searles Valley, California, USA, for the past 200,000 years. ABSTRACT SUPPLIED BY ORIGINATOR: This study aims to evaluate whether machine learning techniques can be successfully applied to process the complex information contained within the molecular abundance distributions of plant wax n-alkane and n-alkanoic acid homologous series. We trained five vegetation identification models using plant wax chain length distributions from modern plants in the Mojave Desert (hyperarid) and the San Bernardino Mountains (conifer forest) and previously published data for macrophytes from Blood Pond (USA) and Mt Kenya (Kenya). All vegetation identification models proved accurate (mean classification accuracy = 0.81) at classifying the modern plant wax chain length distributions into desert plants, conifer and macrophyte categories. We then applied the models to fossil waxes extracted from a 76 m lacustrine sediment core drilled in Searles Valley, CA with an approximate age range of 10 to 150 kyrs (SLAPP-SRLS17) to reconstruct the proportion of desert plants, conifer woodland and lake vegetation. We compared our machine learning models with a previously published linear mixing model and validated our modelled plant type distributions by comparing the results with the archaeol caldarchaeol ecometric (ACE), a proxy for lake salinity, measured in the same core. We found a moderate positive correlation (r = 0.40) between the modelled desert plant proportion and high lake salinity in our models as well as a negative correlation (r = -0.45) between modelled macrophyte plants and ACE, validating the ability of the machine learning techniques to detect both xeric and macrophyte plant communities. Our results suggest that machine learning of plant wax molecular abundance distributions has potential to reconstruct past plant communities, given information from two compound classes and highly differentiated vegetation types. 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Native Format(s) https://doi.org/10.25921/410y-ep42 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/31972 HTTPS Web Browser NOAA Study Page Study page with data access information. search https://www.ncei.noaa.gov/products/paleoclimatology/lake HTTPS Information NCEI Lake Page General information for this data type. information https://www.ncei.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/california/searles2021modern.txt HTTPS Download NCEI Direct Download Direct download links for dataset files. download https://www.ncei.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/california/searles2021.txt 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