Threshold Friction Velocities of Saltation Sand Particles for Different Soil Moisture Conditions in the Taklimakan Desert

• Ishizuka Masahide

  Kagawa University

• Mikami Masao

  Meteorological Research Institute

• Yamada Yutaka

  RIKEN

• Zeng FanJiang

  Chinese Academy of Sciences

Abstract

Using an objective method to calculate the saltation threshold friction velocity u_*t based on measurements using a sand particle counter, the values of u_*t were determined to be 0.48 and 0.56 m s^-1 under dry (θ_v = 0.002 m³ m^-3) and wet (θ_v = 0.009 m³ m^-3) conditions, respectively, at a gobi site in the Taklimakan Desert. This result shows that u_*t increased when soil moisture increased resulting from snowfall in March 2003. A simple relationship was found between the saltation flux q(z) at a reference height z and friction velocity u_* and u_*t.

Journal

• SOLA

  SOLA 5 184-187, 2009

  Meteorological Society of Japan

Keywords

• Atmospheric Science

Details

• CRID: 1390282680198785152
• NII Article ID: 130004448501
• DOI: 10.2151/sola.2009-047
• ISSN: 13496476
• Web Site: http://www.jstage.jst.go.jp/article/sola/5/0/5_0_184/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed