Relationship of High-altitude Situation and the Cold-air Blizzard on the Shandong Peninsula
Abstract：Several typical cold-air blizzard processes on the Shandong Peninsula in 2005, 2008, 2010 have been analyzed by conventional observational data and NCEP 1°× 1° data. The results show that： the high-altitude situation .of cold-air blizzard is divided into cold eddy and cross-slot. The snowfall and blizzard points of high-altitude cold eddy are more than those of cross-slot. PV of cold eddy above 500 hPa layer is greater than that of cross-slot. Top vorticity is conducive to strengthen positive vorticity on low-level, and produces low voltage circulation on low level, which can produce the convergence rising motion strengthening the sea water vapor vertical transfer. Therefore, rising velocity of cold eddy is stronger than that of cross-slot, humidity layer is thicker, and cold eddy is easier to produce the blizzard , process.
Keywords：cold-air blizzardpotential vorticityShandong peninsulacold eddycross-slot
Publication Date：2012-03-14
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：5( 44-48 )