noaa-ocean-23431 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 2024-01-30 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) NOAA/WDS Paleoclimatology - Labrador Sea Oxygen Isotope, Geochemistry and Lithology Data Covering the Last 40,000 Years 2018-02-21 publication doi:10.25921/b51r-7515 noaa-ocean-23431 NCEI DSI 1200_02 NCEI DSI 1200_01 Hoffman, J.S. originator Hoffman, J.S. author Clark, P.U. originator Clark, P.U. author Mix, A.C. originator Mix, A.C. author Haley, B.A. originator Haley, B.A. 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 Paleoceanography. The data include parameters of paleoceanography with a geographic location of North Atlantic Ocean. The time period coverage is from 40615 to 1338 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 ocean circulation derived from marine sediments. 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-ocean.png Paleoclimatology - Paleoceanography PNG Earth Science > Paleoclimate > Ocean/Lake Records 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 > paleoceanography earth science > paleoclimate > paleoceanography earth science > paleoclimate > climate reconstructions|paleoceanography earth science > paleoclimate > paleoceanography earth science > paleoclimate > paleoceanography earth science > paleoclimate > paleoceanography earth science > paleoclimate > paleoceanography earth science > paleoclimate > paleoceanography earth science > paleoclimate > paleoceanography earth science > paleoclimate > paleoceanography earth science > paleoclimate > paleoceanography earth science > paleoclimate > paleoceanography earth science > paleoclimate > paleoceanography earth science > paleoclimate > paleoceanography earth science > paleoclimate > paleoceanography earth science > paleoclimate > paleoceanography earth science > paleoclimate > paleoceanography earth science > paleoclimate > paleoceanography earth science > paleoclimate > paleoceanography earth science > paleoclimate > paleoceanography earth science > paleoclimate > climate reconstructions|paleoceanography earth science > paleoclimate > paleoceanography earth science > paleoclimate > paleoceanography earth science > paleoclimate > paleoceanography earth science > paleoclimate > paleoceanography earth science > paleoclimate > paleocean > lithology earth science > paleoclimate > paleocean > reconstruction earth science > paleoclimate > paleocean > oxygen isotopes earth science > paleoclimate > paleocean > geochemistry earth science > paleoclimate > paleocean > trace metals in carbonates earth science > paleoclimate > paleocean > carbon isotopes 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 Reconstruction theme What: calcite; Material: sediment What: delta 18O; Material: benthic foraminifer What: sea water temperature; Material: magnesium/calcium What: notes; Material: null What: age; Material: null What: delta 18O; Material: Neogloboquadrina pachyderma sinistral What: strontium/calcium; Material: Melonis affinis What: uranium/calcium; Material: Melonis affinis What: sample identification; Material: null What: magnesium/calcium; Material: carbonate What: strontium/calcium; Material: carbonate What: manganese/calcium; Material: Melonis affinis What: barium/calcium; Material: Melonis affinis What: delta 18O; Material: Neogloboquadrina pachyderma sinistral What: calcium/strontium; Material: sediment What: delta 13C; Material: Neogloboquadrina pachyderma sinistral What: delta 18O; Material: benthic foraminifer What: age; Material: null What: delta 13C; Material: benthic foraminifer What: magnesium/calcium; Material: Melonis affinis What: sea water temperature; Material: magnesium/calcium What: depth; Material: null What: dolomite; Material: sediment What: kaolinite; Material: sediment What: mineral index; Material: sediment 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 Ocean > Atlantic Ocean > North Atlantic Ocean > HU2006040-006 > LATITUDE 54.7 > LONGITUDE -52.9 Ocean > Atlantic Ocean > North Atlantic Ocean > HU2001043-008 > LATITUDE 48.2 > LONGITUDE -45.9 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: Hoffman, J.S.; Clark, P.U.; Mix, A.C.; Haley, B.A. (2018-02-21): NOAA/WDS Paleoclimatology - Labrador Sea Oxygen Isotope, Geochemistry and Lithology Data Covering the Last 40,000 Years. [indicate subset used]. NOAA National Centers for Environmental Information. https://doi.org/10.25921/b51r-7515. 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. Ocean Temperature Variability during the Late Pleistocene 2018 publication Hoffman, Jeremy S. author PhD dissertation publisher crossReference sciencePaper eng; USA geoscientificInformation Date Range: 40615 cal yr BP to 1338 cal yr BP; -52.9 -45.9 48.2 54.7 -38665 612 STUDY NOTES: XRF measurements performed at the Bedford Institute of Oceanography. XRD performed by John Andrews at INSTAAR. See dissertation chapter for details. Detailed metadata available from the Oregon State University Stable Isotope Lab. Provided Keywords: Glacial, last deglacial ABSTRACT SUPPLIED BY ORIGINATOR: This dissertation explores one overarching question relevant to the paleoclimate of the latest Pleistocene glacial cycle (approximately the last 130,000 years): “How did spatial and temporal evolution of ocean temperature, both at the surface and interior, relate to other parts of the climate system in the late Pleistocene?” Results from three studies are presented that seek to address longstanding questions in paleoceanography and paleoclimatology for the late Pleistocene using a combination of novel and accepted statistical and geochemical analysis techniques and leveraging comparisons with available global climate model data. The last interglaciation (LIG; ~129-116 ka) was the most recent period in Earth’s history with higher-than-present global sea level (≥6-9 m) under similar-to-preindustrial concentrations of atmospheric CO₂. This suggests that additional feedbacks related to albedo, insolation, and ocean overturning circulation may have resulted in the apparent warming required to cause the higher sea level. Our understanding of how much warmer the LIG was relative to the present interglaciation remains uncertain, however, with current estimates suggesting that sea-surface temperatures (SSTs) were 0-2°C warmer than late-20th century average global temperatures. We present a global compilation of proxy-based annual SST spanning the LIG. Using Monte Carlo and Bayesian techniques to propagate uncertainties in age-model and proxy-based SST reconstructions, our results quantify the spatial timing, amplitude, and uncertainty in global and regional SST change during the LIG. Our conclusions suggest that the LIG surface ocean was indistinguishable from the average surface ocean temperatures observed for the last two decades (1995-2014). This may ultimately imply that the Earth is currently committed to ≥6-9m of equilibrium sea-level rise. Although the LIG is not an analogue for present and future climate change due to the large differences in seasonal orbital insolation and absence of anthropogenic greenhouse gas radiative forcing, it provides an opportunity to test the ability of global climate models to simulate the mechanisms and climate feedbacks responsible for the warmer climate and higher global mean sea level during the LIG. However, when forced only by LIG greenhouse gas concentrations and insolation changes, climate models suggest that the annual mean temperature response was not significantly different from preindustrial control simulations. We present the first multi-model and multiscenario ensemble of transient and equilibrium global climate modeling results spanning the LIG. We show, using a novel model-data comparison framework, that these scenario-specific model results exhibit regionally independent agreement with ocean basin-specific proxy-based SST stacks. This result ultimately implies structural uncertainties and/or misrepresentations of climate feedbacks in the existing suite of climate model simulations, or underestimations of additional proxy-based SST uncertainties. Our conclusions suggest a new target LIG time period for future model-data comparisons and highlight the need for higher resolution transient climate modeling of the LIG and its dependence on meltwater input to the high latitude oceans during the preceding deglaciation. Few discoveries have stimulated the paleoclimate community more so than Heinrich events. Nevertheless, the cause of Heinrich events, characterized by a large flux of icebergs sourced from the Hudson Strait Ice Stream into the North Atlantic, remains debated. Commonly attributed to internal ice-sheet instability, the occurrence of Heinrich events during the coldest intervals of the last glacial cycle instead suggests an external climate control. We expand on recent studies that have shown that incursions of warm subsurface waters into the intermediate depth North Atlantic Ocean destabilized an ice shelf fronting the Hudson Strait Ice Stream, causing a Heinrich event. We present new surface- and bottom-water stable isotope, trace metal, and sedimentary records from two cores taken along the Labrador margin that further support subsurface warming as a trigger of Hudson Strait Heinrich events. We further relate these changes to other sediment core records from the North Atlantic and transient deglacial climate modeling results to show that subsurface warming was ubiquitous across the intermediate North Atlantic during the early part of the last deglaciation and was most likely caused by a preceding reduction in the Atlantic Meridional Overturning Circulation. 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/b51r-7515 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/23431 HTTPS Web Browser NOAA Study Page Study page with data access information. search https://www.ncei.noaa.gov/products/paleoclimatology/paleoceanography HTTPS Information NCEI Paleoceanography Page General information for this data type. information https://www.ncei.noaa.gov/pub/data/paleo/contributions_by_author/hoffman2018/hoffman2016-008twc-xrf.txt HTTPS Download /contributions_by_author/hoffman2018/hoffman2016-008twc-xrf.txt Original Data and Full Metadata download https://www.ncei.noaa.gov/pub/data/paleo/contributions_by_author/hoffman2018/hoffman2016-008twc-xrd.txt HTTPS Download /contributions_by_author/hoffman2018/hoffman2016-008twc-xrd.txt Original Data and Full Metadata download https://www.ncei.noaa.gov/pub/data/paleo/contributions_by_author/hoffman2018/hoffman2016-008twc-mg-sr-ca.txt HTTPS Download /contributions_by_author/hoffman2018/hoffman2016-008twc-mg-sr-ca.txt Original Data and Full Metadata download https://www.ncei.noaa.gov/pub/data/paleo/contributions_by_author/hoffman2018/hoffman2016-008twc-isotope.txt HTTPS Download /contributions_by_author/hoffman2018/hoffman2016-008twc-isotope.txt Original Data and Full Metadata download https://www.ncei.noaa.gov/pub/data/paleo/contributions_by_author/hoffman2018/hoffman2016-008twc-bwt.txt HTTPS Download /contributions_by_author/hoffman2018/hoffman2016-008twc-bwt.txt Original Data and Full Metadata download https://www.ncei.noaa.gov/pub/data/paleo/contributions_by_author/hoffman2018/hoffman2016-008pc-xrf.txt HTTPS Download /contributions_by_author/hoffman2018/hoffman2016-008pc-xrf.txt Original Data and Full Metadata download https://www.ncei.noaa.gov/pub/data/paleo/contributions_by_author/hoffman2018/hoffman2016-008pc-xrd.txt HTTPS Download /contributions_by_author/hoffman2018/hoffman2016-008pc-xrd.txt Original Data and Full Metadata download https://www.ncei.noaa.gov/pub/data/paleo/contributions_by_author/hoffman2018/hoffman2016-008pc-isotope.txt HTTPS Download /contributions_by_author/hoffman2018/hoffman2016-008pc-isotope.txt Original Data and Full Metadata download https://www.ncei.noaa.gov/pub/data/paleo/contributions_by_author/hoffman2018/hoffman2016-006pc-xrf.txt HTTPS Download /contributions_by_author/hoffman2018/hoffman2016-006pc-xrf.txt Original Data and Full Metadata download https://www.ncei.noaa.gov/pub/data/paleo/contributions_by_author/hoffman2018/hoffman2016-006pc-xrd.txt HTTPS Download /contributions_by_author/hoffman2018/hoffman2016-006pc-xrd.txt Original Data and Full Metadata download https://www.ncei.noaa.gov/pub/data/paleo/contributions_by_author/hoffman2018/hoffman2016-006pc-isotope.txt HTTPS Download /contributions_by_author/hoffman2018/hoffman2016-006pc-isotope.txt Original Data and Full Metadata download asNeeded This ISO metadata record was translated from DIF metadata using dif-9x-to-iso-19115-2.xsl Version: 2022-06-21