Summertime taklimakan dust structure

Y. Hara, I. Uno, K. Yumimoto, M. Tanaka, A. Shimizu, N. Sugimoto, Z. Liu

研究成果: ジャーナルへの寄稿記事

9 引用 (Scopus)

抄録

Vertical dust structures and meteorological conditions over the Taklimakan Desert during the summertime periods (July-September) in 2006 and 2007 were investigated using satellite data including the CALIPSO lidar (CALIOP) measurements and the Weather Research and Forecasting (WRF) model simulation. Summertime convective velocity simulated by WRF was greater than 3 m/s, and the convective time scale was about 1000 s (ca. 15 min). We examined 42 CALIPSO paths (24 daytime and 18 nighttime paths) of data acquired under convective dusty conditions. The dust layer thickness derived from the CALIOP measurements reaches 3000-4000 m, which is approximately equal to the Tarim Basin depth. This thickness shows a good correlation with the WRF simulated depth of the convective boundary layer (BL). The dust remains suspended during both daytime and nighttime; the CALIOP average dust extinction coefficients in the BL are respectively 0.151 ± 0.102 km -1 and 0.128 ± 0.079 km -1 for daytime and nighttime. Finally, we estimated the dust amount transported from the BL to the free atmosphere. Typically, 10-20 Gg/day of dust (assuming area of 600 km × 300 km as a main part of the Taklimakan Desert) is transported from the Taklimakan Desert by vertical mixing. The daily horizontal dust flux above the BL was estimated to be 40-50 Gg/day over the Taklimakan Desert.

元の言語英語
記事番号L23801
ジャーナルGeophysical Research Letters
35
発行部数23
DOI
出版物ステータス出版済み - 12 16 2008

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dust
deserts
boundary layers
daytime
desert
CALIPSO (Pathfinder satellite)
weather
forecasting
CALIPSO
boundary layer
free atmosphere
convective boundary layer
extinction coefficient
vertical mixing
optical radar
lidar
satellite data
extinction
timescale
atmosphere

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Earth and Planetary Sciences(all)

これを引用

Summertime taklimakan dust structure. / Hara, Y.; Uno, I.; Yumimoto, K.; Tanaka, M.; Shimizu, A.; Sugimoto, N.; Liu, Z.

:: Geophysical Research Letters, 巻 35, 番号 23, L23801, 16.12.2008.

研究成果: ジャーナルへの寄稿記事

Hara, Y, Uno, I, Yumimoto, K, Tanaka, M, Shimizu, A, Sugimoto, N & Liu, Z 2008, 'Summertime taklimakan dust structure', Geophysical Research Letters, 巻. 35, 番号 23, L23801. https://doi.org/10.1029/2008GL035630
Hara, Y. ; Uno, I. ; Yumimoto, K. ; Tanaka, M. ; Shimizu, A. ; Sugimoto, N. ; Liu, Z. / Summertime taklimakan dust structure. :: Geophysical Research Letters. 2008 ; 巻 35, 番号 23.
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