noaa-lakelevel-17677 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 2025-01-10 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) NOAA/WDS Paleoclimatology - The seismic-stratigraphic record of lake-level fluctuations in Lake Challa: hydrological stability and change in equatorial East-Africa over the last 140 kyr 2014-12-19 publication doi:10.25921/dvyn-a925 noaa-lakelevel-17677 NCEI DSI 1200_02 NCEI DSI 1200_01 Moernaut, J. originator Moernaut, J. author Verschuren, D. originator Verschuren, D. author Charlet, F originator Charlet, F author Kristen, I. originator Kristen, I. author Fagot, M. originator Fagot, M. author De Batist, M. originator De Batist, 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 Lake Level Reconstruction. The data include parameters of lake levels|paleolimnology with a geographic location of Kenya, Eastern Africa. The time period coverage is from 127710 to -60 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 lake levels, mostly related to changes in moisture balance (evaporation-precipitation). 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-lakelevel.png Paleoclimatology - Lake Level Reconstruction PNG Earth Science > Climate Indicators > Paleoclimate Indicators > Ocean/Lake Records > Lake Levels 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 > lake levels|paleolimnology earth science > paleoclimate > lake levels|paleolimnology earth science > paleoclimate > lake levels|paleolimnology earth science > paleoclimate > lake levels|paleolimnology earth science > paleoclimate > lake levels|paleolimnology earth science > paleoclimate > lake levels|paleolimnology earth science > paleoclimate > lake levels|paleolimnology earth science > paleoclimate > lake levels|paleolimnology earth science > paleoclimate > lake levels|paleolimnology earth science > paleoclimate > lake levels 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 Monsoon theme What: lake level; Material: null What: age at sample end; Material: null What: age at sample end; Material: null What: age at sample start; Material: null What: age at sample start; Material: null What: age at sample start; Material: null What: notes; Material: null What: lake level; Material: null What: age at sample end; 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 > Lake Challa > LATITUDE -3.3167 > LONGITUDE 37.7 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: Moernaut, J.; Verschuren, D.; Charlet, F; Kristen, I.; Fagot, M.; De Batist, M. (2014-12-19): NOAA/WDS Paleoclimatology - The seismic-stratigraphic record of lake-level fluctuations in Lake Challa: hydrological stability and change in equatorial East-Africa over the last 140 kyr. [indicate subset used]. NOAA National Centers for Environmental Information. https://doi.org/10.25921/dvyn-a925. 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. The seismic-stratigraphic record of lake-level fluctuations in Lake Challa: hydrological stability and change in equatorial East-Africa over the last 140 kyr 2010 publication Moernaut, J.; Verschuren, D.; Charlet, F.; Kristen, I.;Fagot, M.; De Batist, M. author Earth and Planetary Science Letters publisher https://doi.org/10.1016/j.epsl.2009.12.023 HTTPS Web Browser Associated Reference published 2010 Moernaut, J.; Verschuren, D.; Charlet, F.; Kristen, I.;Fagot, M.; De Batist, M., 2010: The seismic-stratigraphic record of lake-level fluctuations in Lake Challa: hydrological stability and change in equatorial East-Africa over the last 140 kyr. Earth and Planetary Science Letters, 290, 214-223, 10.1016/j.epsl.2009.12.023 information crossReference sciencePaper eng; USA geoscientificInformation Date Range: 127710 cal yr BP to -60 cal yr BP; 37.7 37.7 -3.3167 -3.3167 Study Coordinates -3.3167 37.7 -125760 2010 STUDY NOTES: Lake Challa 130kyr lake-level reconstruction. Reconstruction based on the succession of draped (highstand) and focused (lowstand) units in seismic stratigraphy, and landslide deposits (lowstands); see Moernaut et al. (2010), Earth and Planetary Science Letters 290, 214-223. Contact: Dirk Verschuren, dirk.verschuren@UGent.be ABSTRACT SUPPLIED BY ORIGINATOR: Seismic-reflection data from crater lake Challa(Mt. Kilimanjaro, equatorial East Africa) reveal a ~210-m thick sedimentary infill containing distinct seismic-stratigraphic signatures of late-Quaternary lake-level fluctuations. Extrapolation of a well-constrained age model on the cored upper part of the sequence suggests that these lake-level fluctuations represent a detailed and continuous record of moisture-balance variation in equatorial East Africa over the last 140 kyr. This record indicates that the most severe aridity occurred during peak Penultimate glaciation immediately before ~128 kyr BP (coeval with Heinrich event 11) and during a Last Interglacial ‘megadrought’ period between ~114 and ~97 kyr BP; in comparison, Last Glacial Maximum (LGM) aridity was modest. It was preceded by ~75 000 years of relatively stable and moist climate conditions interrupted by eleven short-lived dry spells, five of which match the timing of Heinrich events 2 to 6. Climate history near the East African equator reflects variation in the precessional forcing of monsoon rainfall modulated by orbital eccentricity, but precession-driven moisture fluctuations were less extreme than those observed in northern and southern tropical Africa. The near-continuous moist climate from ~97 to 20.5 kyr BP recorded in the Lake Challa record contrasts with the trend towards greater aridity after ~70 kyr BP documented in equatorial West Africa. This long period of moist glacial climate and a short, relatively modest LGM drought can be attributed to greater independence of western Indian Ocean monsoon dynamics from northern high-latitude glaciation than those in the tropical Atlantic Ocean. This rather persistent moist glacial climate regime may have helped maintain high biodiversity in the tropical forest ecosystems of the Eastern Arc mountains in Tanzania. 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/dvyn-a925 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/17677 HTTPS Web Browser NOAA Study Page Study page with data access information. search https://www.ncei.noaa.gov/products/paleoclimatology/lake-level-reconstruction HTTPS Information NCEI Lake Level Reconstruction Page General information for this data type. information https://www.ncei.noaa.gov/pub/data/paleo/paleolimnology/lakelevels/africa/eastafrica/moernaut2010-lakechalla.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