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NOAA/WDS Paleoclimatology - Late glacial to Holocene sortable silt records from the southwestern Labrador Sea

browse graphicPaleoclimatology - Paleoceanography
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 21342 to 750 in calendar years before present (BP). See metadata information for parameter and study location details. Please cite this study when using the data.
  • Cite as: Hoffmann, S.S.; Dalsing, R.E.; Murphy, S.C. (2019-05-06): NOAA/WDS Paleoclimatology - Late glacial to Holocene sortable silt records from the southwestern Labrador Sea. [indicate subset used]. NOAA National Centers for Environmental Information. https://doi.org/10.25921/536j-qz31. Accessed [date].
  • Please refer to Credit tab for full citation information.
noaa-ocean-26730
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DistributorNOAA National Centers for Environmental Information
ncei.info@noaa.gov
Dataset Point of Contact NOAA National Centers for Environmental Information
ncei.info@noaa.gov
Dataset Point of Contact Data Center Contact
NOAA World Data Service for Paleoclimatology
828-271-4800
paleo@noaa.gov
Coverage DescriptionDate Range: 21342 cal yr BP to 750 cal yr BP;
Time Period-19392 to 1200
Spatial Bounding Box Coordinates
N: 49.244
S: 49
E: -45.017
W: -48.9877
Spatial Coverage Map
General Documentation
Associated Resources
  • Sortable silt records of intermediate-depth circulation and sedimentation in the Southwest Labrador Sea since the Last Glacial Maximum
    • Associated Reference published 2019
      Hoffmann, S.S., Dalsing, R.E., and Murphy, S.C., 2019: Sortable silt records of intermediate-depth circulation and sedimentation in the Southwest Labrador Sea since the Last Glacial Maximum. Quaternary Science Reviews, 206, 99-110, 10.1016/j.quascirev.2018.12.028
Publication Dates
  • publication: 2019-05-06
Data Presentation Form Digital table - digital representation of facts or figures systematically displayed, especially in columns
Dataset Progress StatusComplete - production of the data has been completed
Data Update Frequency Data update frequency not available
Supplemental Information
STUDY NOTES: Site metadata: KN158-4-27 (49.244 N, -48.9877 W, -1846 m, core length: 2.13); KN158-4-28 (49.2433 N, -48.9872 W, -1828 m, core length: 0.36); V23-18 (49 N, -45.017 W, -1593 m, core length: 4.05) Provided Keywords: sediment grain size, sediment geochemistry
ABSTRACT SUPPLIED BY ORIGINATOR: The Labrador Sea is a vital region for the Atlantic Meridional Overturning Circulation (AMOC), where overflow waters from the Nordic Seas mix with locally produced Labrador Sea Water, before exiting to the interior of the Atlantic Ocean. The dynamical sedimentary proxy of mean sortable silt size (SS) can give information on past changes in deep water circulation speed and the strength of AMOC. We have produced (SS) records from two core sites at depths between 1500 and 2000 m on the continental slope east of Newfoundland, to reconstruct changes in intermediate depth water circulation speed, including Glacial North Atlantic Intermediate Water and Labrador Sea Water over the past 22,000 years. Increases in (SS) appear to coincide with much of the deglaciation as well as the mid-late Holocene. End-member modeling suggests that ice-rafted debris (IRD) is an important factor in interpreting (SS) during the deglaciation. We find that a robust increase in (SS) is likely unrelated to IRD during the past 5 ka, and probably reflects increased flow at intermediate depths due to local production of LSW strengthening as Nordic Seas overflows weakened at this depth. Our results highlight both the complications of producing (SS) records in IRD-rich, slope environments and the promise that this proxy nevertheless has for reconstructing dynamical changes in deep ocean currents.
PurposeRecords 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.
Dataset Citation
  • Cite as: Hoffmann, S.S.; Dalsing, R.E.; Murphy, S.C. (2019-05-06): NOAA/WDS Paleoclimatology - Late glacial to Holocene sortable silt records from the southwestern Labrador Sea. [indicate subset used]. NOAA National Centers for Environmental Information. https://doi.org/10.25921/536j-qz31. Accessed [date].
  • 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.
Cited Authors
  • Hoffmann, S.S.
  • Dalsing, R.E.
  • Murphy, S.C.
Originators
  • Hoffmann, S.S.
  • Dalsing, R.E.
  • Murphy, S.C.
Publishers
  • NOAA National Centers for Environmental Information
Theme keywordsGlobal Change Master Directory (GCMD) Science Keywords
  • Earth Science > Paleoclimate > Ocean/Lake Records
  • Earth Science > Climate Indicators > Paleoclimate Indicators > Ocean/Lake Records
Global Change Master Directory (GCMD) Science Keywords
  • 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 > paleocean > physical properties
  • earth science > paleoclimate > paleocean > oxygen isotopes
  • earth science > paleoclimate > paleocean > geochemistry
Paleoenvironmental Standard Terms (PaST) Thesaurus
  • What: sortable silt mean grain size; Material: sediment
  • What: sortable silt mean grain size; Material: sediment
  • What: silt; Material: sediment
  • What: calcium/strontium; Material: sediment
  • What: grain size class; Material: sediment
  • What: grain size class; Material: sediment
  • What: grain size class; Material: sediment
  • What: sample identification; Material: null
  • What: age; Material: null
  • What: sortable silt mean grain size; Material: sediment
  • What: grain size class; Material: sediment
  • What: grain size class; Material: sediment
  • What: delta 18O; Material: Neogloboquadrina pachyderma sinistral
  • What: depth; Material: null
  • What: red intensity; Material: sediment
Data Center keywordsGlobal Change Master Directory (GCMD) Data Center Keywords
  • DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
Place keywords
  • Ocean > Atlantic Ocean > North Atlantic Ocean > V23-18, KN158-4-27 and 28 > LATITUDE > LONGITUDE
Use Constraints
  • Cite as: Hoffmann, S.S.; Dalsing, R.E.; Murphy, S.C. (2019-05-06): NOAA/WDS Paleoclimatology - Late glacial to Holocene sortable silt records from the southwestern Labrador Sea. [indicate subset used]. NOAA National Centers for Environmental Information. https://doi.org/10.25921/536j-qz31. Accessed [date].
  • 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.
  • 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.
Access Constraints
  • 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.
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Last Modified: 2023-09-01
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