• Environmental Science
  • Published 2004

Applying of Helicity in Analysis of a Severe Sandstorm

  title={Applying of Helicity in Analysis of a Severe Sandstorm},
  author={Tao Jian-hong and Wang Jin-song and Feng Jian-ying},
The helicity of a severe sandstorm happened in Northwest China was analyzed by using global reanalysis grid data of NCEP/NCAR for 4 times a day. As an important physical parameter in analyzing and predicting strong convective weather, the helicity also has good indication in the forecasting of sandstorm. The distribution of helicity over the sandstorm area was negative at higher levels and positive at lower levels. There was definite relationship between the evolvement of helicity's negative… CONTINUE READING


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