|
|
|
Abstract The use of conventional weather maps, NCEP 1 × 1 ° reanalysis data, aiming at two large rain storm processes in Jiangxi on May 13 and May 21, 2010, the weather situation fields, influential systems and physics fields were compared, The results showed that: 1. there are similar basic characteristics and differences in the two processes, common ground is that the cold air in high latitude frequently moved toward south by way of short-wave trough, which provided heavy rain occurred with the environmental background conditions. 2. What move eastward of vortex and shear and the continued existence of convergence area provided a favorable dynamic lifting conditions; 3. What a southwest jet and the strong water vapor flux in low-level and the establishment of water vapor flux convergence center provided a favorable moisture conditions; 4. The difference is the location of affect systems such as vortex, shear and others, intensity of helicity and other physical quantities in process of the rainstorm development, determined the intensity of heavy rainfall; 5. the physical indices of “5 .13”heavy rain are more strong and typical than that of “5.21” heavy rain, but rainfall is less than that of “5.21”, which indicated that the strong convective precipitation in frontal warm sector is an important condition to produce heavy rain.
|
|
Received: 12 October 2010
Published: 03 June 2014
|
|
|
|
|
|
|
|
2011, Vol. 28 
