Size-resolved adjoint inversion of Asian dust

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

We expanded the variational assimilation system of a regional dust model by using size-resolved inversion. Dust emissions and particle-size distributions of a severe dust and sandstorm (DSS) in April 2005 were inversely optimized with optical measurements by the National Institute for Environmental Studies lidar network. The inversion results successfully compensated underestimates by the original model and increased the ngstrm exponent around the DSS core by 13-17%, shifting the particle-size distribution to finer. The a posteriori size distribution was distinctly different between eastern and western source regions. In the western regions, dust emissions in the 3.19 and 5.06 m size bins increased considerably, and the peak size shifted from 5.06 to 3.19 m, whereas in the eastern regions, emissions of finer particles (bins 0.82-2.01 m) increased. Differences in vegetation and soil type and moisture between eastern and western regions might explain the characteristics of the inverted size distribution.

Original languageEnglish
Article numberL24807
JournalGeophysical Research Letters
Volume39
Issue number24
DOIs
Publication statusPublished - Dec 28 2012

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dust
inversions
particle size distribution
particle size
assimilation
vegetation
optical measurement
optical radar
moisture
lidar
vegetation type
soil type
soils
soil moisture
inversion
exponents

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Earth and Planetary Sciences(all)

Cite this

Size-resolved adjoint inversion of Asian dust. / Yumimoto, Keiya; Uno, Itsushi; Sugimoto, N.; Shimizu, A.; Hara, Yukari; Takemura, Toshihiko.

In: Geophysical Research Letters, Vol. 39, No. 24, L24807, 28.12.2012.

Research output: Contribution to journalArticle

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