Case study of a Chinese dust plume reaching the French Alps

Details Case study of a Chinese dust plume reaching the French Alps Case study of a Chinese dust plume reaching the French Alps

Mar 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003georl..30f..10g&link_type=abstract

Geophysical Research Letters, Volume 30, Issue 6, pp. 10-1, CiteID 1277, DOI 10.1029/2002GL016833

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21

Atmospheric Composition And Structure: Aerosols And Particles (0345, 4801), Atmospheric Composition And Structure: Constituent Sources And Sinks, Atmospheric Composition And Structure: Pollution-Urban And Regional (0305), Atmospheric Composition And Structure: Middle Atmosphere-Constituent Transport And Chemistry (3334), Atmospheric Composition And Structure: Troposphere-Constituent Transport And Chemistry

Scientific paper

By combining reconstruction of airmass back-trajectories from dust deposition sites in Europe and measurements of the (Nd) isotopic composition of deposited dust particles, potential sources of different Saharan dust events can be identified. The study of ``red dust'' events collected in France allowed us to identify distinct North African source areas (e.g. Lybia vs. Mauritania). Surprisingly, the airmass trajectory of one dust event (March 6, 1990) was distinct from the others, and revealed a Chinese origin. The Nd isotopic composition of this dust was consistent with the range of isotopic compositions of Chinese loess. Moreover, an atmospheric global model simulation reveals that a dust plume left China before February 25, 1990, flew over North America around the February/March transition and reached the French Alps by March 6, 1990, revealing that intercontinental dust and pollutant transport may occur across the Pacific Ocean and the North Atlantic at the Westerlies latitudes.

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