ISSN 1000-0526
CN 11-2282/P
CN 11-2282/P
Contrast Analysis of Three Squall Lines in Middle and Lower Reaches of the Huaihe River in June 2009
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Abstract:
The three squall lines happened in the middle and lower reaches of the Huaihe River in June 2009. The conventional and nonconventional data， radar and satellite observations， NCEP/NCAR 1°×1° reanalysis and NCEP/GFS analysis data are used in the paper, to contrast and explore the genesis conditions and mechanisms for these squall lines. The results show that the three squall lines have similar circulation pattern at 500 hPa, the stronger accumulating unstable energy， the suitable transfer of water vapor in the low level, and thus forming the similar unstable atmospheric stratification. In the above situations the convergence rising occurred in low levels, the dry and cold air intruding in high levels and the stronger wind vertical shear made the cold and warm air writhing upper and down， the unstable energy was released, thus organized squall line systems were formed. The influence of the squall lines can be monitored and forecasted by the satellites and radars.
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