Trans-Pacific yellow sand transport observed in April 1998: A numerical simulation

Itsushi Uno, Hiroyasu Amano, Seita Emori, Kisei Kinoshita, Ichiro Matsui, Nobuo Sugimoto

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Abstract

A yellow sand transport episode from the Asian continent to Japan and North America which occurred in April 1998 is simulated. A new on-line dust tracer model coupled with a regional-scale meteorological model is developed and applied to this dust storm episode. The results for two large dust events that started during April 14-15 and 19-20, 1998, have been analyzed and discussed. The first dust storm was trapped in a cutoff vortex developed over the China plain. A modeled 3-D structure of dust associated with this cutoff vortex agreed with an observed time-height cross section of dust concentration. Results show that the strong subsidence at the backside of the vortex restricted the dust layer below 3 km level. Model analysis revealed that the second dust event that started during April 19-20 over inland China was the origin of a dust episode reported over North America. The trans-Pacific dust transport simulation successfully showed the dust onset near the West Coast of North America. Elevation of the dust layer during the long-range transport was below 3 km. The model is extended to include the transport of an Asian origin anthropogenic tracer over the North Pacific Rim. Both the natural-origin mineral dust and the Asian-origin anthropogenic tracer are simultaneously transported even if their emission regions are different.

Original languageEnglish
Article number2000JD900748
Pages (from-to)18331-18344
Number of pages14
JournalJournal of Geophysical Research Atmospheres
Volume106
Issue numberD16
DOIs
Publication statusPublished - Aug 27 2001

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Forestry
  • Oceanography
  • Aquatic Science
  • Ecology
  • Water Science and Technology
  • Soil Science
  • Geochemistry and Petrology
  • Earth-Surface Processes
  • Atmospheric Science
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science
  • Palaeontology

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    Uno, I., Amano, H., Emori, S., Kinoshita, K., Matsui, I., & Sugimoto, N. (2001). Trans-Pacific yellow sand transport observed in April 1998: A numerical simulation. Journal of Geophysical Research Atmospheres, 106(D16), 18331-18344. [2000JD900748]. https://doi.org/10.1029/2000JD900748