noaa-recon-28632 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 2024-03-19 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) NOAA/WDS Paleoclimatology - Lake Naivasha, Kenya 1,650 Year Salinity and Lake Level Reconstructions 2019-12-27 publication doi:10.25921/4p53-4775 noaa-recon-28632 NCEI DSI 1200_02 NCEI DSI 1200_01 Van der Meeren, T. originator Van der Meeren, T. author Ito, E. originator Ito, E. author Laird, K.R. originator Laird, K.R. author Cumming, B.F. originator Cumming, B.F. author Verschuren, D. originator Verschuren, 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 Climate Reconstruction. The data include parameters of climate reconstructions|paleolimnology with a geographic location of Kenya, Eastern Africa. The time period coverage is from 1611 to -44 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 temperature, precipitation, and other climate variables derived from paleoclimate proxies. Parameter keywords describe what was measured in this data set. Additional summary information can be found in the abstracts of papers listed in the data set 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-recon.png Paleoclimatology - Climate Reconstruction 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 > climate reconstructions|paleolimnology earth science > paleoclimate > climate reconstructions|lake levels|paleolimnology earth science > paleoclimate > climate reconstructions|lake levels|paleolimnology earth science > paleoclimate > climate reconstructions|lake levels|paleolimnology earth science > paleoclimate > reconstructions > lake level earth science > paleoclimate > reconstructions > lake salinity 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 Other Hydroclimate Reconstruction theme What: salinity; Material: diatom assemblage|lake water What: lake level; Material: null What: age; Material: null What: depth; 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 Continent > Africa > Eastern Africa > Kenya > Crescent Island Crater, Lake Naivasha > LATITUDE -.7635 > LONGITUDE 36.408 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: Van der Meeren, T.; Ito, E.; Laird, K.R.; Cumming, B.F.; Verschuren, D. (2019-12-27): NOAA/WDS Paleoclimatology - Lake Naivasha, Kenya 1,650 Year Salinity and Lake Level Reconstructions. [indicate subset used]. NOAA National Centers for Environmental Information. https://doi.org/10.25921/4p53-4775. 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. Ecohydrological evolution of Lake Naivasha (central Rift Valley, Kenya) during the past 1650 years, as recorded by ostracod assemblages and stable-isotope geochemistry 2019 publication Thijs Van der Meeren, Emi Ito, Kathleen R. Laird, Brian F. Cumming, Dirk Verschuren author Quaternary Science Reviews publisher https://doi.org/10.1016/j.quascirev.2019.105906 HTTPS Web Browser Associated Reference published 2019 Thijs Van der Meeren, Emi Ito, Kathleen R. Laird, Brian F. Cumming, Dirk Verschuren, 2019: Ecohydrological evolution of Lake Naivasha (central Rift Valley, Kenya) during the past 1650 years, as recorded by ostracod assemblages and stable-isotope geochemistry. Quaternary Science Reviews, 223, , 10.1016/j.quascirev.2019.105906 information crossReference sciencePaper eng; USA geoscientificInformation Date Range: 339 CE to 1994 CE; Date Range: 1611 cal yr BP to -44 cal yr BP; 36.408 36.408 -.7635 -.7635 Study Coordinates -.7635 36.408 339 1994 STUDY NOTES: Chironomid-based salinity and lake level reconstructions for Lake Naivasha, Kenya for the past 1,650 years. Update of the previously archived paleolimnological reconstruction from Verschuren et al. 2000 Nature, https://www.ncdc.noaa.gov/paleo/study/6070. ABSTRACT SUPPLIED BY ORIGINATOR: Lake Naivasha (central Rift Valley, Kenya) is regionally unique in having accumulated a continuous sediment record of climate-driven palaeohydrological change over the past 1650 years, attesting to dramatic shifts between freshwater high-stands and either fresh or saline low-stands. This study employs fossil ostracod assemblages and stable-isotope (d18O and d13C) signatures to disclose the lake's ecohydrological history and explain the evolving non-linearity between lake level and salinity. The original age model and lithology-based lake-level reconstruction are revised, and the diatom-inferred salinity reconstruction is expanded to the lower (pre-770 CE) part of the record. The stable-isotope time series showed limited coherence with the other proxies, probably due to complexities related to hydrological connections between different surface- and groundwater components shifting through time. Ostracod palaeoecological data indicate that between ca 350 and 1200 CE the system often veered towards hydrological closure, with frequent and high-amplitude shifts in lake level and salinity preventing long-term establishment of wetland vegetation. Low lake-level and saline conditions dominated between ca 900 and 1200 CE. After that time and particularly since the onset of more permanent Malewa River inflow ca 1430 CE, hydrologically open conditions prevailed. Salinity shifts exhibited lower amplitude and frequency, promoting the expansion of wetland vegetation and associated biota including benthivorous fish. With lake water balance strongly influenced by variation in river inflow, high-amplitude lake-level fluctuations continued throughout the freshwater phase of the past 600 years, notably creating a pronounced high-stand dated to ca 1600-1780 CE and the well-documented extreme low-stand of the early 1800s. 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Native Format(s) https://doi.org/10.25921/4p53-4775 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/28632 HTTPS Web Browser NOAA Study Page Study page with data access information. search https://www.ncei.noaa.gov/products/paleoclimatology/climate-reconstruction HTTPS Information NCEI Climate Reconstruction Page General information for this data type. information https://www.ncei.noaa.gov/pub/data/paleo/paleolimnology/eastafrica/naivasha2019salinity.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