CAJ | 학술논문

提利用1981—2000年常规气象观测和NCEP／NCAR再分析资料，采用合成分析和动力诊断分析方法，对冷流强降雪与非冷流强降雪的空间分布、大气环流、水汽输送、稳定度和垂直运动进行对比分析。结果表明：冷流强降雪是发生在槽后西北气流里的中小尺度不稳定降雪，非冷流强降雪是发生在槽前西南气流中大尺度稳定性降雪。冷流强降雪具有明显的地方性特点，是强冷空气对下垫面物理状态强迫响应的结果。提出强冷空气与渤海暖水面相互作用产生的大气边界层不稳定是产生冷流降雪的本质，在这种边界层不稳定层结中发生的降雪是冷流降雪的概念。
제이용1981—2000년상규기상관측화NCEP／NCAR재분석자료，채용합성분석화동력진단분석방법，대랭류강강설여비랭류강강설적공간분포、대기배류、수기수송、은정도화수직운동진행대비분석。결과표명：랭류강강설시발생재조후서북기류리적중소척도불은정강설，비랭류강강설시발생재조전서남기류중대척도은정성강설。랭류강강설구유명현적지방성특점，시강랭공기대하점면물리상태강박향응적결과。제출강랭공기여발해난수면상호작용산생적대기변계층불은정시산생랭류강설적본질，재저충변계층불은정층결중발생적강설시랭류강설적개념。
According to the conventional meteorological observation over the period 1981-2000 and NCEP/NCAR reanalysis data,coupled with synthetic analysis and power diagnostic analysis method,the paper il-lustrates the spatial distribution of cold-air snowstorm and non-cold-air snowstorm,atmospheric circula-tion,vapor transportation,stability and vertical motion and does comparative analysis.The results indi-cate that cold-air snowstorms are meso- and micro-scale snowfalls which occur in the northwest air flow be-hind trough,while the non-cold-air snowstorms tend to occur in southwest air flow in front of trough,u-sually large-scale snowfalls.Cold-air snowstorms have distinct local characteristics,resulting from the re-sponse of strong cold air to the physical condition of underlying surface.In addition,this paper proposes that the unstability of atmospheric boundary caused by the strong interaction of cold and warm waters of the Bohai Sea is the nature of cold-air snowfalls,and the snowfalls occurring in such unstable stratification of boundary layer is the concept of cold-air snowfalls.