Not logged in
PANGAEA.
Data Publisher for Earth & Environmental Science

Friese, Carmen A; van Hateren, Johannes A; Vogt, Christoph; Fischer, Gerhard; Stuut, Jan-Berend W (2017): Supplementary data to: Seasonal provenance changes of present-day Saharan dust collected on- and offshore Mauritania. PANGAEA, https://doi.org/10.1594/PANGAEA.877807, Supplement to: Friese, CA et al. (2017): Seasonal provenance changes in present-day Saharan dust collected in and off Mauritania. Atmospheric Chemistry and Physics, 17(16), 10163-10193, https://doi.org/10.5194/acp-2017-131

Always quote above citation when using data! You can download the citation in several formats below.

RIS CitationBibTeX CitationShow MapGoogle Earth

Abstract:
Saharan dust has a crucial influence on the earth climate system and its emission, transport and deposition are intimately related to, e.g., wind speed, precipitation, temperature and vegetation cover. The alteration in the physical and chemical properties of Saharan dust due to environmental changes is often used to reconstruct the climate of the past. However, to better interpret possible climate changes the dust source regions need to be known. By analysing the mineralogical composition of transported or deposited dust, potential dust source areas can be inferred. Summer dust transport off northwest Africa occurs in the Saharan air layer (SAL). In continental dust source areas, dust is also transported in the SAL; however, the predominant dust input occurs from nearby dust sources with the low-level trade winds. Hence, the source regions and related mineralogical tracers differ with season and sampling location. To test this, dust collected in traps onshore and in oceanic sediment traps off Mauritania during 2013 to 2015 was analysed. Meteorological data, particle-size distributions, back-trajectory and mineralogical analyses were compared to derive the dust provenance and dispersal. For the onshore dust samples, the source regions varied according to the seasonal changes in trade-wind direction. Gibbsite and dolomite indicated a Western Saharan and local source during summer, while chlorite, serpentine and rutile indicated a source in Mauritania and Mali during winter. In contrast, for the samples that were collected offshore, dust sources varied according to the seasonal change in the dust transporting air layer. In summer, dust was transported in the SAL from Mauritania, Mali and Libya as indicated by ferroglaucophane and zeolite. In winter, dust was transported with the trades from Western Sahara as indicated by, e.g., fluellite.
Coverage:
Median Latitude: 20.461870 * Median Longitude: -18.005877 * South-bound Latitude: 19.885000 * West-bound Longitude: -20.933333 * North-bound Latitude: 21.281660 * East-bound Longitude: -16.250000
Date/Time Start: 2013-01-05T17:15:00 * Date/Time End: 2015-09-21T11:41:23
Size:
13 datasets

Download Data

Download ZIP file containing all datasets as tab-delimited text (use the following character encoding: )

Datasets listed in this publication series

  1. Friese, CA; van Hateren, H; Vogt, C et al. (2017): Bulk mass of sediment trap CB-24. https://doi.org/10.1594/PANGAEA.877803
  2. Friese, CA; van Hateren, H; Vogt, C et al. (2017): Bulk mass of sediment trap CBi-11. https://doi.org/10.1594/PANGAEA.877804
  3. Friese, CA; van Hateren, H; Vogt, C et al. (2017): Bulk mass of sediment trap CBi-12. https://doi.org/10.1594/PANGAEA.877805
  4. Friese, CA; van Hateren, H; Vogt, C et al. (2017): Concentration and horizontal flux of dust sampler Iwik-13. https://doi.org/10.1594/PANGAEA.877815
  5. Friese, CA; van Hateren, H; Vogt, C et al. (2017): Concentration and horizontal flux of dust sampler Iwik-14. https://doi.org/10.1594/PANGAEA.877816
  6. Friese, CA; van Hateren, H; Vogt, C et al. (2017): Grain-size analysis of dust collector station Iwik-13. https://doi.org/10.1594/PANGAEA.877890
  7. Friese, CA; van Hateren, H; Vogt, C et al. (2017): Grain-size analysis of dust collector station Iwik-14. https://doi.org/10.1594/PANGAEA.877891
  8. Friese, CA; van Hateren, H; Vogt, C et al. (2017): Grain-size analysis of sediment trap CB-24. https://doi.org/10.1594/PANGAEA.877878
  9. Friese, CA; van Hateren, H; Vogt, C et al. (2017): Grain-size analysis of sediment trap CBi-11. https://doi.org/10.1594/PANGAEA.877879
  10. Friese, CA; van Hateren, H; Vogt, C et al. (2017): Mineralogical composition of sediment trap CBi-11, CBi-12 (upper) and dust sampler Iwik-13, Iwik-14. https://doi.org/10.1594/PANGAEA.877819
  11. Friese, CA; van Hateren, H; Vogt, C et al. (2017): Rain from time series station Arkeiss in 2014. https://doi.org/10.1594/PANGAEA.877854
  12. Friese, CA; van Hateren, H; Vogt, C et al. (2017): Wind direction and wind speed from time series station Iwik. https://doi.org/10.1594/PANGAEA.877841
  13. Friese, CA; van Hateren, H; Vogt, C et al. (2017): Wind direction, wind speed, and rain from time series station Carmen (2013 - 2015). https://doi.org/10.1594/PANGAEA.877853