noaa-lake-38499 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 2023-09-15 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) NOAA/WDS Paleoclimatology - Ngamring Co Hydrogen Isotopic Composition of Long-Chain Fatty Acids and brGDGTs based Mean Annual Temperature over the last 18ka 2023-09-12 publication doi:10.25921/e3rg-vc84 noaa-lake-38499 NCEI DSI 1200_02 NCEI DSI 1200_01 Sun, Z. originator Sun, Z. author Hou, X. originator Hou, X. author Ji, K. originator Ji, K. author Yuan, K. originator Yuan, K. author Li, C.-G. originator Li, C.-G. author Wang, M. originator Wang, M. author Hou, J. originator Hou, 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 climate reconstructions|paleolimnology with a geographic location of China, Eastern Asia. The time period coverage is from 18056 to -62 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 > climate reconstructions|paleolimnology earth science > paleoclimate > climate reconstructions|paleolimnology earth science > paleoclimate > paleolimnology earth science > paleoclimate > paleolimnology earth science > paleoclimate > paleolimnology earth science > paleoclimate > climate reconstructions|paleolimnology earth science > paleoclimate > paleolimnology earth science > paleoclimate > paleolimnology earth science > paleoclimate > paleolimnology earth science > paleoclimate > paleolimnology earth science > paleoclimate > paleolimnology > hydrogen isotopes earth science > paleoclimate > paleolimnology > reconstruction earth science > paleoclimate > paleolimnology > age control 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 Air Temperature Reconstruction Monsoon Other Hydroclimate Reconstruction westerlies theme What: depth; Material: null What: age; Material: null What: C26 n-alkanoic acid; Material: null What: delta 2H; Material: C28 n-alkanoic acid What: delta 2H; Material: n-alkanoic acid What: air temperature; Material: glycerol dialkyl glycerol tetraether What: delta 2H; Material: C26 n-alkanoic acid What: delta 2H; Material: C26 n-alkanoic acid What: C28 n-alkanoic acid; Material: null What: delta 2H; Material: C28 n-alkanoic acid 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 > Asia > Eastern Asia > China > Ngamring Co > LATITUDE 29.31 > LONGITUDE 87.18 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: Sun, Z.; Hou, X.; Ji, K.; Yuan, K.; Li, C.-G.; Wang, M.; Hou, J. (2023-09-12): NOAA/WDS Paleoclimatology - Ngamring Co Hydrogen Isotopic Composition of Long-Chain Fatty Acids and brGDGTs based Mean Annual Temperature over the last 18ka. [indicate subset used]. NOAA National Centers for Environmental Information. https://doi.org/10.25921/e3rg-vc84. 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. 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Changes in atmospheric circulation and glacier melting since the last deglaciation revealed by a lacustrine dD record at Ngamring Co, the upper-middle Yarlung Tsangpo watershed 2022 publication Sun, Zhe, Kejia Ji, Xiaohuan Hou, Kan Yuan, Can-Ge Li, Juzhi Hou author Palaeogeography, Palaeoclimatology, Palaeoecology publisher https://doi.org/10.1016/j.palaeo.2022.111027 HTTPS Web Browser Associated Reference published 2022 Sun, Zhe, Kejia Ji, Xiaohuan Hou, Kan Yuan, Can-Ge Li, Juzhi Hou, 2022: Changes in atmospheric circulation and glacier melting since the last deglaciation revealed by a lacustrine dD record at Ngamring Co, the upper-middle Yarlung Tsangpo watershed. Palaeogeography, Palaeoclimatology, Palaeoecology, 598, , 10.1016/j.palaeo.2022.111027 information crossReference sciencePaper eng; USA geoscientificInformation Date Range: 18056 cal yr BP to -62 cal yr BP; 87.152384 87.223252 29.283079 29.339558 -16106 2012 STUDY NOTES: The hydrogen isotope data was published in the Palaeogeography, Palaeoclimatology, Palaeoecology paper (doi: 10.1016/j.palaeo.2022.111027) and the mean annual temperature was published in Quaternary Science Reviews (doi: 10.1016/j.quascirev.2022.107690) ABSTRACT SUPPLIED BY ORIGINATOR: Both the Indian Summer Monsoon (ISM) and glacier meltwater are suggested to significantly influence the modern discharge of the Yarlung Tsangpo River, which is the longest river of Tibet and is an important freshwater source for the local population as well as for the large populations in India and Bangladesh in the lower reaches. Understanding past hydroclimatic variations of the region is therefore important for predicting future changes under global warming scenarios. Here we present a continuous compound-specific hydrogen isotope record of sedimentary leaf waxes covering the past 18 ka (ka = 1000 yr) from Ngamring Co, located in the upper-middle Yarlung Tsangpo range, a typical monsoonal region, with the aim of documenting hydroclimatic changes since the last deglaciation. Compared with measurements of continuous scanning XRF and magnetic susceptibility, the dD at Ngamring Co is believed to reflect atmospheric circulation and glacial meltwater input rather than direct local humidity. In detail, the record indicates relatively enriched dD values during the Late Pleistocene, suggesting the predominance of the Westerlies and limited moisture delivery by the ISM, which was associated with cooling at high northern latitudes. The fast dD depletion indicates that ISM penetrated into TP since ~10.5 ka BP (before present, the present is 1950 CE), then the gradually increased dD values suggested the ISM attenuated in phase with summer insolation during early to middle Holocene. The negative deviation of dD (>80‰, abrupt depleted at 3 ka BP) since ~6 ka BP suggested glacier melting in the catchment and ended at ~0.2 ka BP, which emphasizes the glacial contribution to the hydroclimatic change in Yarlung Tsangpo watershed. Such depletion was also observed at Aweng Co in the western TP, which suggests that a glacier meltwater contribution to lakes and rivers may be a large-scale phenomenon on the TP. Comparison of the dD record from Ngamring Co with independent paleotemperature records indicates the control of summer temperature/insolation on glacier melting may not be the most important factor during the late Holocene, and instead we propose that the mean annual air temperature and glacier volume were more crucial to the melting process. If our inference is correct, the disappearance of a glacier from the Ngamring Co basin at ~0.2 ka BP is likely to be indicative of the fate of other glaciers on the TP under ongoing global warming. However, independent reconstructions of temperature and direct glacier dynamics from the same site are needed to validate our hypothesis. 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/e3rg-vc84 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/38499 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/asia/china/sun2022/sun2022-ngamring-co.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