NOAA/WDS Paleoclimatology - Northern Morocco Holocene Speleothem d18O Data and Rainfall Index

browse graphicPaleoclimatology - Speleothem
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 Cave. The data include parameters of reconstructions (precipitation) with a geographic location of Morocco, Northern Africa. The time period coverage is from 11787 to -58 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: Ait Brahim, Y.; Wassenburg, J.A.; Sha, L.; Cruz, F.W.; Deininger, M.; Sifeddine, A.; Bouchaou, L.; Spötl, C.; Edwards, R.L.; Cheng, H. (2019-07-04): NOAA/WDS Paleoclimatology - Northern Morocco Holocene Speleothem d18O Data and Rainfall Index. [indicate subset used]. NOAA National Centers for Environmental Information. https://www.ncdc.noaa.gov/paleo/study/27150. Accessed [date].
  • Please refer to Credit tab for full citation information.
  • noaa-cave-27150
  • NCEI DSI 1200_01
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Distributor Customer Engagement Branch
DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
1-828-271-4800
ncei.orders@noaa.gov
Dataset Point of Contact Bauer, Bruce
DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
+1 303-497-6280
paleo@noaa.gov
Coverage Description Date Range: 11787 cal yr BP to -58 cal yr BP;
Time Period -9837 to 2008
Spatial Bounding Box Coordinates
N: 33.95
S: 33.84
E: -4.09
W: -4.246
Spatial Coverage Map
General Documentation
Associated Resources
  • North Atlantic Ice-Rafting, Ocean and Atmospheric Circulation During the Holocene: Insights From Western Mediterranean Speleothems
    • Associated Reference published 2019
      Y. Ait Brahim, J.A. Wassenburg, L. Sha, F.W. Cruz, M. Deininger, A. Sifeddine, L. Bouchaou, Christoph Spotl, R.L. Edwards, H. Cheng, 2019: North Atlantic Ice-Rafting, Ocean and Atmospheric Circulation During the Holocene: Insights From Western Mediterranean Speleothems. Geophysical Research Letters, , , 10.1029/2019GL082405
Publication Dates
  • publication: 2019-07-04
Data Presentation Form Digital table - digital representation of facts or figures systematically displayed, especially in columns
Dataset Progress Status Complete - production of the data has been completed
Data Update Frequency Data update frequency not available
Supplemental Information
STUDY NOTES: Speleothem oxygen isotope (d18O) data and derived rainfall index for 3 speleothems from Northern Morrocco over the Holocene.
ABSTRACT SUPPLIED BY ORIGINATOR: The North Atlantic Oscillation is the dominant atmospheric pressure mode in the North Atlantic region and affects winter temperature and precipitation in the Mediterranean, northwest Europe, Greenland, and Asia. The index that describes the sea-level pressure difference between Iceland and the Azores is correlated with a dipole precipitation pattern over northwest Europe and northwest Africa. How the North Atlantic Oscillation will develop as the Greenland ice sheet melts is unclear. A potential past analogue is the early Holocene, during which melting ice sheets around the North Atlantic freshened surface waters, affecting the strength of the meridional overturning circulation. Here we present a Holocene rainfall record from northwest Africa based on speleothem d18O and compare it against a speleothem-based rainfall record from Europe. The two records are positively correlated during the early Holocene, followed by a shift to an anti-correlation, similar to the modern record, during the mid-Holocene. On the basis of our simulations with an Earth system model, we suggest the shift to the anti-correlation reflects a large-scale atmospheric and oceanic reorganization in response to the demise of the Laurentide ice sheet and a strong reduction of meltwater flux to the North Atlantic, pointing to a potential sensitivity of the North Atlantic Oscillation to the melting of ice sheets.
Purpose Records of past temperature, precipitation, and other aspects of climate derived from mineral deposits found in caves. 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: Ait Brahim, Y.; Wassenburg, J.A.; Sha, L.; Cruz, F.W.; Deininger, M.; Sifeddine, A.; Bouchaou, L.; Spötl, C.; Edwards, R.L.; Cheng, H. (2019-07-04): NOAA/WDS Paleoclimatology - Northern Morocco Holocene Speleothem d18O Data and Rainfall Index. [indicate subset used]. NOAA National Centers for Environmental Information. https://www.ncdc.noaa.gov/paleo/study/27150. 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
  • Ait Brahim, Y.
  • Wassenburg, J.A.
  • Sha, L.
  • Cruz, F.W.
  • Deininger, M.
  • Sifeddine, A.
  • Bouchaou, L.
  • Spötl, C.
  • Edwards, R.L.
  • Cheng, H.
Originators
  • Ait Brahim, Y.
  • Wassenburg, J.A.
  • Sha, L.
  • Cruz, F.W.
  • Deininger, M.
  • Sifeddine, A.
  • Bouchaou, L.
  • Spötl, C.
  • Edwards, R.L.
  • Cheng, H.
Publishers
  • NOAA National Centers for Environmental Information
Theme keywords Global Change Master Directory (GCMD) Science Keywords
  • Earth Science > Climate Indicators > Paleoclimate Indicators > Land Records > Cave Deposits
  • Earth Science > Climate Indicators > Paleoclimate Indicators > Speleothems
  • Earth Science > Paleoclimate > Land Records > Cave Deposits
Global Change Master Directory (GCMD) Science Keywords
  • earth science > paleoclimate > reconstructions > precipitation
  • earth science > paleoclimate > speleothems > oxygen isotopes
  • Precipitation Reconstruction
Place keywords
  • Continent > Africa > Northern Africa > Morocco> Grotte de Piste > LATITUDE 33.84 > LONGITUDE -4.09
  • Continent > Africa > Northern Africa > Morocco> Chaara Cave > LATITUDE 33.95 > LONGITUDE -4.246
Use Constraints
  • Cite as: Ait Brahim, Y.; Wassenburg, J.A.; Sha, L.; Cruz, F.W.; Deininger, M.; Sifeddine, A.; Bouchaou, L.; Spötl, C.; Edwards, R.L.; Cheng, H. (2019-07-04): NOAA/WDS Paleoclimatology - Northern Morocco Holocene Speleothem d18O Data and Rainfall Index. [indicate subset used]. NOAA National Centers for Environmental Information. https://www.ncdc.noaa.gov/paleo/study/27150. 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: 2019-07-05
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