Observation of dust and anthropogenic aerosol plumes in the Northwest Pacific with a two-wavelength polarization lidar on board the research vessel Mirai

Nobuo Sugimoto, Ichiro Matsui, Atsushi Shimizu, Itsushi Uno, Kazuhiro Asai, Tatsuo Endoh, Teruyuki Nakajima

Research output: Contribution to journalArticle

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Abstract

Dust and anthropogenic aerosol plumes from the Asian continent were observed in the Northwest Pacific (32.0° to 38.0°N, 146.5°E) with a two-wavelength polarization lidar on board the research vessel Mirai during the MR01-K02 cruise (May 14 to 28, 2001). Dust aerosols were identified from the aerosol depolarization ratio at 532 nm and the ratio of the backscattering coefficient at 1064 nm and 532 nm. High aerosol density air masses with a low depolarization ratio and a small wavelength ratio (indicating small particle size) were also detected in the plume. The distribution patterns of the dust and the spherical aerosols were conceptionally explained by the model prediction for dust and sulfate with the Chemical Weather Forecast System (CFORS). Aerosols with large particle size but with low depolarization ratio were also observed in between the layers of dust and sulfate. This indicates that the aerosols were possibly an internal mixture of dust and sulfate.

Original languageEnglish
Pages (from-to)7-1
Number of pages7
JournalGeophysical Research Letters
Volume29
Issue number19
Publication statusPublished - Oct 1 2002

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Pacific Northwest (US)
research vessel
optical radar
lidar
plumes
vessels
aerosols
polarization
plume
dust
aerosol
wavelength
wavelengths
depolarization
sulfates
sulfate
particle size
distribution (property)
air masses
continents

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Earth and Planetary Sciences(all)

Cite this

Observation of dust and anthropogenic aerosol plumes in the Northwest Pacific with a two-wavelength polarization lidar on board the research vessel Mirai. / Sugimoto, Nobuo; Matsui, Ichiro; Shimizu, Atsushi; Uno, Itsushi; Asai, Kazuhiro; Endoh, Tatsuo; Nakajima, Teruyuki.

In: Geophysical Research Letters, Vol. 29, No. 19, 01.10.2002, p. 7-1.

Research output: Contribution to journalArticle

Sugimoto, Nobuo ; Matsui, Ichiro ; Shimizu, Atsushi ; Uno, Itsushi ; Asai, Kazuhiro ; Endoh, Tatsuo ; Nakajima, Teruyuki. / Observation of dust and anthropogenic aerosol plumes in the Northwest Pacific with a two-wavelength polarization lidar on board the research vessel Mirai. In: Geophysical Research Letters. 2002 ; Vol. 29, No. 19. pp. 7-1.
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