noaa-recon-11928 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 2024-03-11 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) NOAA/WDS Paleoclimatology - Sahara-Sahel Holocene Paleohydrological Database 2011-08-23 publication doi:10.25921/qg69-f575 noaa-recon-11928 NCEI DSI 1200_02 NCEI DSI 1200_01 Lézine, A.-M. originator Lézine, A.-M. author Hély, C. originator Hély, C. author Grenier, C. originator Grenier, C. author Braconnot, P. originator Braconnot, P. author Krinner, G. originator Krinner, G. 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|lake levels|other collections|paleolimnology with a geographic location of Niger, Western Africa. The time period coverage is from 10200 to 1500 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|lake levels|other collections|paleolimnology earth science > paleoclimate > climate reconstructions|lake levels|other collections|paleolimnology earth science > paleoclimate > climate reconstructions|lake levels|other collections|paleolimnology earth science > paleoclimate > climate reconstructions|lake levels|other collections|paleolimnology earth science > paleoclimate > lake levels|paleolimnology earth science > paleoclimate > climate reconstructions|lake levels|other collections|paleolimnology earth science > paleoclimate > climate reconstructions|lake levels|other collections|paleolimnology earth science > paleoclimate > climate reconstructions|lake levels|other collections|paleolimnology earth science > paleoclimate > climate reconstructions|lake levels|other collections|paleolimnology earth science > paleoclimate > climate reconstructions|lake levels|other collections|paleolimnology earth science > paleoclimate > climate reconstructions|lake levels|other collections|paleolimnology earth science > paleoclimate > climate reconstructions|lake levels|other collections|paleolimnology earth science > paleoclimate > climate reconstructions|lake levels|other collections|paleolimnology earth science > paleoclimate > climate reconstructions|lake levels|other collections|paleolimnology earth science > paleoclimate > reconstructions > lake level 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 hydrology theme What: sample identification; Material: null What: age; Material: null What: age; Material: null What: notes; Material: null What: lake level; Material: null What: notes; Material: null What: latitude; Material: null What: sample identification; Material: null What: notes; Material: null What: longitude; Material: null What: notes; Material: null What: notes; Material: null What: age; Material: null What: age; 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 > Western Africa > Niger > Adrar Bous > LATITUDE 20.3 > LONGITUDE 9.03 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: Lézine, A.-M.; Hély, C.; Grenier, C.; Braconnot, P.; Krinner, G. (2011-08-23): NOAA/WDS Paleoclimatology - Sahara-Sahel Holocene Paleohydrological Database. [indicate subset used]. NOAA National Centers for Environmental Information. https://doi.org/10.25921/qg69-f575. 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. Sahara and Sahel vulnerability to climate changes, lessons from Holocene hydrological data 2011 publication Lézine, A.-M., C. Hély, C. Grenier, P. Braconnot, and G. Krinner author Quaternary Science Reviews publisher https://doi.org/10.1016/j.quascirev.2011.07.006 HTTPS Web Browser Associated Reference published 2011 Lézine, A.-M., C. Hély, C. Grenier, P. Braconnot, and G. Krinner, 2011: Sahara and Sahel vulnerability to climate changes, lessons from Holocene hydrological data. Quaternary Science Reviews, 30, 3001-3012, 10.1016/j.quascirev.2011.07.006 information crossReference sciencePaper eng; USA geoscientificInformation Date Range: 10200 cal yr BP to 1500 cal yr BP; 9.03 9.03 20.3 20.3 Study Coordinates 20.3 9.03 -8250 450 STUDY NOTES: Database of Holocene paleohydrological reconstructions derived from published sources for the Sahara and Sahel, 10°N to 28°N. The former extent of lakes, wetlands and rivers can be reconstructed by a variety of paleolimnological evidence including abandoned shorelines, sediment outcrops, aquatic pollen types from sediment cores, remains of aquatic faunas such as hippos, fishes and shells, and former fluvial terraces. Paleohydrological variations can also be inferred from paleosalinity reconstructions from micro-faunal assemblages (diatoms, chironomids, ostracods) and stable isotope ratios in carbonates. This data set is composed of 1688 dated samples from about 415 localities in the present day Sahara and Sahel, extracted from original published studies. The file has been slightly modified from the original version used for the paper: new references have been included, and unpublished data have been removed. ABSTRACT SUPPLIED BY ORIGINATOR: The examination of more than 1500 paleohydrological dated records collected between 10 and 28°N during the last 50 years have been used to improve our knowledge and understanding of the Sahara and Sahel vulnerability to the Atlantic monsoon changes in the long-term. We have analyzed the distribution of water bodies (mainly lakes and wetlands) over time and space: the central Saharan massifs played a major role in favoring water supply to the lowlands throughout the whole African Humid Period. In addition, distinct East-West dynamics is recorded with humidity starting - and stopping - several millennia earlier to the east than to the west of the Sahara. A series of time lags are discussed: (1) between the maximum of deep (fresh water) lake formation during the early Holocene and the maximum of water body extensions during the mid-Holocene which highlight the primary role of aquifer water level in lake response to climate change (2) between the hydrological history of the Sahara and the Sahel and the forcings - mainly insolation changes - during the early and mid-Holocene which involves complex interactions between remnant ice sheet in the Northern Hemisphere, open water bodies in the Sahara and Sahel and the Atlantic monsoon system. 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/qg69-f575 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/11928 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/africa/sahara-sahel2011hydro.xls HTTPS Download NCEI Direct Download Direct download links for dataset files. download https://www.ncei.noaa.gov/pub/data/paleo/paleolimnology/africa/sahara-sahel2011hydro.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