noaa-lake-38209 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 2023-09-01 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) NOAA/WDS Paleoclimatology - Lake Gus, Greenland Holocene brGDGT and Alkenone Data 2023-06-13 publication doi:10.25921/r0nh-vb71 noaa-lake-38209 NCEI DSI 1200_02 NCEI DSI 1200_01 Cluett, A.A. originator Cluett, A.A. author Thomas, E.K. originator Thomas, E.K. author McKay, N.P. originator McKay, N.P. author Castañeda, I.S. originator Castañeda, I.S. author Morrill, C. originator Morrill, C. 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 Greenland. The time period coverage is from 9214 to -67 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 > 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 > 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 Arctic theme What: delta 15N; Material: sediment What: nitrogen; Material: sediment What: branched glycerol dialkyl glycerol tetraether; Material: null What: branched glycerol dialkyl glycerol tetraether; Material: null What: methylation index of branched tetraethers; Material: null What: sample thickness; Material: sediment What: isoprenoid glycerol dialkyl glycerol tetraether; Material: null What: branched glycerol dialkyl glycerol tetraether; Material: null What: branched glycerol dialkyl glycerol tetraether; Material: null What: C37:3 alkenone; Material: null What: mass; Material: dry sediment What: carbon/nitrogen; Material: sediment What: isoprenoid glycerol dialkyl glycerol tetraether; Material: null What: branched glycerol dialkyl glycerol tetraether; Material: null What: branched glycerol dialkyl glycerol tetraether; Material: null What: branched glycerol dialkyl glycerol tetraether; Material: null What: methylation index of branched tetraethers; Material: null What: age; Material: null What: isoprenoid glycerol dialkyl glycerol tetraether; Material: null What: isoprenoid glycerol dialkyl glycerol tetraether; Material: null What: branched glycerol dialkyl glycerol tetraether; Material: null What: methylation index of branched tetraethers; Material: null What: branched glycerol dialkyl glycerol tetraether; Material: null What: branched glycerol dialkyl glycerol tetraether; Material: null What: C37:4 alkenone; Material: null What: branched glycerol dialkyl glycerol tetraether; Material: null What: branched glycerol dialkyl glycerol tetraether; Material: null What: branched glycerol dialkyl glycerol tetraether; Material: null What: sample identification; Material: null What: sample identification; Material: null What: carbon; Material: sediment What: C37:2 alkenone; Material: null What: delta 13C; Material: sediment What: depth; Material: null What: depth at sample end; Material: null What: isoprenoid glycerol dialkyl glycerol tetraether; Material: null What: isoprenoid glycerol dialkyl glycerol tetraether; Material: null What: branched glycerol dialkyl glycerol tetraether; Material: null What: branched glycerol dialkyl glycerol tetraether; Material: null What: C37:3 alkenone; 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 > North America > Greenland > Gus Lake > LATITUDE 67.032 > LONGITUDE -52.43 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: Cluett, A.A.; Thomas, E.K.; McKay, N.P.; Castañeda, I.S.; Morrill, C. (2023-06-13): NOAA/WDS Paleoclimatology - Lake Gus, Greenland Holocene brGDGT and Alkenone Data. [indicate subset used]. NOAA National Centers for Environmental Information. https://doi.org/10.25921/r0nh-vb71. 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. Lake dynamics modulate the air temperature variability recorded by sedimentary aquatic biomarkers: a Holocene case study from western Greenland 2023 publication Cluett, A.A., Thomas, E.K., McKay, N.P., Cowling, O.C., Castañeda, I.S., and Morrill, C. author Journal of Geophysical Research: Biogeosciences publisher https://doi.org/10.1029/2022JG007106 HTTPS Web Browser Associated Reference published 2023 Cluett, A.A., Thomas, E.K., McKay, N.P., Cowling, O.C., Castañeda, I.S., and Morrill, C., 2023: Lake dynamics modulate the air temperature variability recorded by sedimentary aquatic biomarkers: a Holocene case study from western Greenland. Journal of Geophysical Research: Biogeosciences, 128, , 10.1029/2022JG007106 information crossReference sciencePaper eng; USA geoscientificInformation Date Range: 9214 cal yr BP to -67 cal yr BP; -52.43 -52.43 67.032 67.032 Study Coordinates 67.032 -52.43 -7264 2017 STUDY NOTES: Scripts for analysis can be found at https://github.com/ACluett/Lake-Gus-Biomarkers ABSTRACT SUPPLIED BY ORIGINATOR: Quantitative temperature reconstructions from lacustrine organic geochemical proxies including branched glycerol dialkyl glycerol tetraethers (brGDGTs) and alkenones provide key constraints on past continental climates. However, estimation of air temperatures from proxies can be impacted by non-stationarity in the relationships between seasonal air and water temperatures, a factor not yet examined in strongly seasonal high-latitude settings. We pair downcore analyses of brGDGTs and alkenones measured on the same samples through the Holocene with forward-modeled proxy values based on thermodynamic lake model simulations for a western Greenland lake. The measured brGDGT distributions suggest that stable autochthonous (aquatic) production overpowers allochthonous inputs for most samples, justifying the use of the lake model to interpret temperature-driven changes. Conventional calibration of alkenones (detected only after 5.5 thousand years BP) suggests substantially larger temperature variations than conventional calibration of brGDGTs. Comparison of proxy measurements to forward-modeled values suggests variations in brGDGT distributions monotonically reflect multi-decadal summer air temperatures changes, although the length of the ice-free season dampens the influence of air temperatures on water temperatures. Drivers of alkenone variability remain less clear; potential influences include small changes in the seasonality of proxy production or biases toward specific years, both underlain by non-linearity in water-air temperature sensitivity during relevant seasonal windows. We demonstrate that implied temperature variability can differ substantially between proxies because of differences in air-water temperature sensitivity during windows of proxy synthesis without necessitating threshold behavior in the lake or local climate, and recommend that future studies incorporate lake modeling to constrain this uncertainty. 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/r0nh-vb71 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/38209 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/greenland/cluett2023/cluett2023-alk-gdgt.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