Grotte de Piste, Morocco 11.5 - 2.5 ka Speleothem Isotope and Geochemical Data Wassenburg, J.A.; Dietrich, D.; Fietzke, J.; Fohlmeister, J.; Jochum, K.P.; Scholz, D.; Richter, D.K.; Sabaoui, A.; Spötl, C.; Lohmann, G.; Andreae, M.O.; Immenhauser, A. Wassenburg, J.A. Dietrich, D. Fietzke, J. Fohlmeister, J. Jochum, K.P. Scholz, D. Richter, D.K. Sabaoui, A. Spötl, C. Lohmann, G. Andreae, M.O. Immenhauser, A. North Atlantic Oscillation earth science/paleoclimate/instrumental (collection date,null,null,null,null,instrumental,null,null,C,null) earth science/paleoclimate/speleothems (depth,null,null,millimeter,null,speleothems,null,null,N,null) earth science/paleoclimate/speleothems (delta 13C,calcium carbonate,null,per mil VPDB,null,speleothems,detrended,isotope ratio mass spectrometry,N,null) earth science/paleoclimate/speleothems (uranium,calcium carbonate,null,parts per million,null,speleothems,raw,inductively-coupled plasma mass spectrometry|laser ablation,N,null) earth science/paleoclimate/speleothems (delta 18O,calcium carbonate,null,per mil VPDB,null,speleothems,detrended,isotope ratio mass spectrometry,N,null) earth science/paleoclimate/speleothems (magnesium/calcium,calcium carbonate,null,mole per mole,null,speleothems,raw,inductively-coupled plasma mass spectrometry|laser ablation,N,null) earth science/paleoclimate/speleothems (strontium,calcium carbonate,null,parts per million,null,speleothems,raw,inductively-coupled plasma mass spectrometry|laser ablation,N,null) earth science/paleoclimate/speleothems (yttrium,calcium carbonate,null,parts per million,null,speleothems,raw,inductively-coupled plasma mass spectrometry|laser ablation,N,null) earth science/paleoclimate/speleothems (phosphorus,calcium carbonate,null,parts per million,null,speleothems,raw,inductively-coupled plasma mass spectrometry|laser ablation,N,null) earth science/paleoclimate/speleothems (age,null,null,calendar kiloyear before present,null,speleothems,null,null,N,null) earth science/paleoclimate/instrumental (air temperature,null,null,degree Celsius,null,instrumental,raw,null,N,outside air temperature) earth science/paleoclimate/speleothems earth science/paleoclimate/speleothems earth science/paleoclimate/speleothems earth science/paleoclimate/speleothems (Grotte de Piste>LATITUDE 33.84>LONGITUDE -4.09) 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. STUDY NOTES: Stable isotope, geochemical, and trace metals data from speleothems collected in Grotte de Piste, Morocco for 11,500 - 2,500 years before present. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Wassenburg, J.A. Investigator : Dietrich, D. Investigator : Fietzke, J. Investigator : Fohlmeister, J. Investigator : Jochum, K.P. Investigator : Scholz, D. Investigator : Richter, D.K. Investigator : Sabaoui, A. Investigator : Spötl, C. Investigator : Lohmann, G. Investigator : Andreae, M.O. Investigator : Immenhauser, A. 2016-07-18 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/20266 https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/africa/grottedepiste2016bu4mg-ca.txt https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/africa/grottedepiste2016iso.txt https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/africa/grottedepiste2016elem.txt https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/africa/grottedepiste2016temp.txt https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/africa/grottedepiste2016bu2mg-ca.txt https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/africa/grottedepiste2016bu4mg-ca.txt https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/africa/grottedepiste2016iso.txt https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/africa/grottedepiste2016elem.txt https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/africa/grottedepiste2016temp.txt https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/africa/grottedepiste2016bu2mg-ca.txt English https://www.ncdc.noaa.gov/paleo/study/20266 https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/africa/grottedepiste2016bu4mg-ca.txt https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/africa/grottedepiste2016iso.txt https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/africa/grottedepiste2016elem.txt https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/africa/grottedepiste2016temp.txt https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/africa/grottedepiste2016bu2mg-ca.txt Jasper A. Wassenburg, Stephan Dietrich, Jan Fietzke, Jens Fohlmeister, Klaus Peter Jochum, Denis Scholz, Detlev K. Richter, Abdellah Sabaoui, Christoph Spotl, Gerrit Lohmann, Meinrat O. Andreae, Adrian Immenhauser2016Reorganization of the North Atlantic Oscillation during Early Holocene deglaciationNature Geoscience10.1038/ngeo2767http://www.nature.com/ngeo/journal/vaop/ncurrent/full/ngeo2767.html START YEAR: 11416 cal yr BP * END YEAR: -62 cal yr BP -4.09 33.84 -4.09 33.84