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McGee, David; deMenocal, Peter B; Winckler, Gisela; Stuut, Jan-Berend W; Bradtmiller, Louisa I (2013): Reconstructions of eolian dust accumulation in northwest African margin sediments [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.836112, Supplement to: McGee, D et al. (2013): The magnitude, timing and abruptness of changes in North African dust deposition over the last 20,000yr. Earth and Planetary Science Letters, 371-372, 163-176, https://doi.org/10.1016/j.epsl.2013.03.054

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Abstract:
Reconstructions of eolian dust accumulation in northwest African margin sediments provide important continuous records of past changes in atmospheric circulation and aridity in the region. Existing records indicate dramatic changes in North African dust emissions over the last 20 ka, but the limited spatial extent of these records and the lack of high-resolution flux data do not allow us to determine whether changes in dust deposition occurred with similar timing, magnitude and abruptness throughout northwest Africa. Here we present new records from a meridional transect of cores stretching from 31°N to 19°N along the northwest African margin. By combining grain size endmember modeling with 230Th-normalized fluxes for the first time, we are able to document spatial and temporal changes in dust deposition under the North African dust plume throughout the last 20 ka. Our results provide quantitative estimates of the magnitude of dust flux changes associated with Heinrich Stadial 1, the Younger Dryas, and the African Humid Period (AHP; ~11.7-5 ka), offering robust targets for model-based estimates of the climatic and biogeochemical impacts of past changes in North African dust emissions. Our data suggest that dust fluxes between 8 and 6 ka were a factor of ~5 lower than average fluxes during the last 2 ka. Using a simple model to estimate the effects of bioturbation on dust input signals, we find that our data are consistent with abrupt, synchronous changes in dust fluxes in all cores at the beginning and end of the AHP. The mean ages of these transitions are 11.8±0.2 ka (1Sigma) and 4.9±0.2 ka, respectively.
Other version:
McGee, David; deMenocal, Peter B; Winckler, Gisela; Stuut, Jan-Berend W; Bradtmiller, Louisa I (2014): NOAA/WDS Paleoclimatology - North African Dust Deposition Fluxes Over the last 20,000 years. NOAA National Centers for Environmental Information, https://doi.org/10.25921/TK84-B677
Coverage:
Median Latitude: 24.060213 * Median Longitude: -15.727272 * South-bound Latitude: 18.647000 * West-bound Longitude: -18.590000 * North-bound Latitude: 30.880000 * East-bound Longitude: -10.630000
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
46 datasets

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Datasets listed in this publication series

  1. McGee, D; deMenocal, PB; Winckler, G et al. (2013): Age model of sediment core OC437-07_GC27. https://doi.org/10.1594/PANGAEA.835981
  2. McGee, D; deMenocal, PB; Winckler, G et al. (2013): Calcium carbonatel of sediment core OC437-07_GC27. https://doi.org/10.1594/PANGAEA.835995
  3. McGee, D; deMenocal, PB; Winckler, G et al. (2013): Dust fluxes of sediment core OC437-07_GC27. https://doi.org/10.1594/PANGAEA.836079
  4. McGee, D; deMenocal, PB; Winckler, G et al. (2013): Grain size endmember modeling of sediment core OC437-07_GC27. https://doi.org/10.1594/PANGAEA.836035
  5. McGee, D; deMenocal, PB; Winckler, G et al. (2013): Grain size measurements of sediment core OC437-07_GC27. https://doi.org/10.1594/PANGAEA.836054
  6. McGee, D; deMenocal, PB; Winckler, G et al. (2013): Radiocarbon measurements of sediment core OC437-07_GC27. https://doi.org/10.1594/PANGAEA.836028
  7. McGee, D; deMenocal, PB; Winckler, G et al. (2013): Raw 14C data of sediment core OC437-07_GC27. https://doi.org/10.1594/PANGAEA.836016
  8. McGee, D; deMenocal, PB; Winckler, G et al. (2013): Uranium and Thorium isotope measurements of sediment core OC437-07_GC27. https://doi.org/10.1594/PANGAEA.836008
  9. McGee, D; deMenocal, PB; Winckler, G et al. (2013): Best-fit Weibull distributions of sediment core OC437-07_GC27. https://doi.org/10.1594/PANGAEA.836045
  10. McGee, D; deMenocal, PB; Winckler, G et al. (2013): Age model of sediment core OC437-07_GC37. https://doi.org/10.1594/PANGAEA.835994
  11. McGee, D; deMenocal, PB; Winckler, G et al. (2013): Calcium carbonatel of sediment core OC437-07_GC37. https://doi.org/10.1594/PANGAEA.835996
  12. McGee, D; deMenocal, PB; Winckler, G et al. (2013): Dust fluxes of sediment core OC437-07_GC37. https://doi.org/10.1594/PANGAEA.836080
  13. McGee, D; deMenocal, PB; Winckler, G et al. (2013): Grain size endmember modeling of sediment core OC437-07_GC37. https://doi.org/10.1594/PANGAEA.836036
  14. McGee, D; deMenocal, PB; Winckler, G et al. (2013): Grain size measurements of sediment core OC437-07_GC37. https://doi.org/10.1594/PANGAEA.836055
  15. McGee, D; deMenocal, PB; Winckler, G et al. (2014): Radiocarbon measurements of sediment core OC437-07_GC37. https://doi.org/10.1594/PANGAEA.836029
  16. McGee, D; deMenocal, PB; Winckler, G et al. (2013): Raw 14C data of sediment core OC437-07_GC37. https://doi.org/10.1594/PANGAEA.836017
  17. McGee, D; deMenocal, PB; Winckler, G et al. (2013): Uranium and Thorium isotope measurements of sediment core OC437-07_GC37. https://doi.org/10.1594/PANGAEA.836009
  18. McGee, D; deMenocal, PB; Winckler, G et al. (2013): Best-fit Weibull distributions of sediment core OC437-07_GC37. https://doi.org/10.1594/PANGAEA.836046
  19. McGee, D; deMenocal, PB; Winckler, G et al. (2013): Age model of sediment core OC437-07_GC49. https://doi.org/10.1594/PANGAEA.835983
  20. McGee, D; deMenocal, PB; Winckler, G et al. (2013): Calcium carbonatel of sediment core OC437-07_GC49. https://doi.org/10.1594/PANGAEA.835997
  21. McGee, D; deMenocal, PB; Winckler, G et al. (2013): Dust fluxes of sediment core OC437-07_GC49. https://doi.org/10.1594/PANGAEA.836081
  22. McGee, D; deMenocal, PB; Winckler, G et al. (2013): Grain size endmember modeling of sediment core OC437-07_GC49. https://doi.org/10.1594/PANGAEA.836037
  23. McGee, D; deMenocal, PB; Winckler, G et al. (2013): Grain size measurements of sediment core OC437-07_GC49. https://doi.org/10.1594/PANGAEA.836056
  24. McGee, D; deMenocal, PB; Winckler, G et al. (2014): Radiocarbon measurements of sediment core OC437-07_GC49. https://doi.org/10.1594/PANGAEA.836030
  25. McGee, D; deMenocal, PB; Winckler, G et al. (2013): Raw 14C data of sediment core OC437-07_GC49. https://doi.org/10.1594/PANGAEA.836018
  26. McGee, D; deMenocal, PB; Winckler, G et al. (2013): Uranium and Thorium isotope measurements of sediment core OC437-07_GC49. https://doi.org/10.1594/PANGAEA.836010
  27. McGee, D; deMenocal, PB; Winckler, G et al. (2013): Best-fit Weibull distributions of sediment core OC437-07_GC49. https://doi.org/10.1594/PANGAEA.836047
  28. McGee, D; deMenocal, PB; Winckler, G et al. (2013): Age model of sediment core OC437-07_GC66. https://doi.org/10.1594/PANGAEA.835984
  29. McGee, D; deMenocal, PB; Winckler, G et al. (2013): Calcium carbonatel of sediment core OC437-07_GC66. https://doi.org/10.1594/PANGAEA.835998
  30. McGee, D; deMenocal, PB; Winckler, G et al. (2013): Dust fluxes of sediment core OC437-07_GC66. https://doi.org/10.1594/PANGAEA.836082
  31. McGee, D; deMenocal, PB; Winckler, G et al. (2013): Grain size endmember modeling of sediment core OC437-07_GC66. https://doi.org/10.1594/PANGAEA.836038
  32. McGee, D; deMenocal, PB; Winckler, G et al. (2013): Grain size measurements of sediment core OC437-07_GC66. https://doi.org/10.1594/PANGAEA.836057
  33. McGee, D; deMenocal, PB; Winckler, G et al. (2013): Radiocarbon measurements of sediment core OC437-07_GC66. https://doi.org/10.1594/PANGAEA.836031
  34. McGee, D; deMenocal, PB; Winckler, G et al. (2013): Raw 14C data of sediment core OC437-07_GC66. https://doi.org/10.1594/PANGAEA.836019
  35. McGee, D; deMenocal, PB; Winckler, G et al. (2013): Uranium and Thorium isotope measurements of sediment core OC437-07_GC66. https://doi.org/10.1594/PANGAEA.836011
  36. McGee, D; deMenocal, PB; Winckler, G et al. (2013): Best-fit Weibull distributions of sediment core OC437-07_GC66. https://doi.org/10.1594/PANGAEA.836048
  37. McGee, D; deMenocal, PB; Winckler, G et al. (2013): Age model of sediment core OC437-07_GC68. https://doi.org/10.1594/PANGAEA.836001
  38. McGee, D; deMenocal, PB; Winckler, G et al. (2013): Calcium carbonatel of sediment core OC437-07_GC68. https://doi.org/10.1594/PANGAEA.836003
  39. McGee, D; deMenocal, PB; Winckler, G et al. (2013): Dust fluxes of sediment core OC437-07_GC68. https://doi.org/10.1594/PANGAEA.836083
  40. McGee, D; deMenocal, PB; Winckler, G et al. (2013): Grain size endmember modeling of sediment core OC437-07_GC68. https://doi.org/10.1594/PANGAEA.836039
  41. McGee, D; deMenocal, PB; Winckler, G et al. (2013): Grain size measurements of sediment core OC437-07_GC68. https://doi.org/10.1594/PANGAEA.836053
  42. McGee, D; deMenocal, PB; Winckler, G et al. (2014): Radiocarbon measurements of sediment core OC437-07_GC68. https://doi.org/10.1594/PANGAEA.836032
  43. McGee, D; deMenocal, PB; Winckler, G et al. (2013): Raw 14C data of sediment core OC437-07_GC68. https://doi.org/10.1594/PANGAEA.836020
  44. McGee, D; deMenocal, PB; Winckler, G et al. (2013): Uranium and Thorium isotope measurements of sediment core OC437-07_GC68. https://doi.org/10.1594/PANGAEA.836012
  45. McGee, D; deMenocal, PB; Winckler, G et al. (2013): Best-fit Weibull distributions of sediment core OC437-07_GC68. https://doi.org/10.1594/PANGAEA.836049
  46. McGee, D; deMenocal, PB; Winckler, G et al. (2013): (Table 1) Core locations, depths and distances from modern and LGM shorelines. https://doi.org/10.1594/PANGAEA.835971