CAJ | 학술논문

2008年1月10日—2月2日我国中南部地区发生了严重的低温雨雪冰冻灾害。该文分析此次过程的冷空气活动和水汽输送，比较两者在降水形成中的相对重要性。利用文中定义的两个参量，可以直接比较水汽和温度这两个量在降水中所起的作用，并比较两者作用的相对重要性。结果表明：在低层（850 hPa 及以下），我国中南部地区温度偏低、水汽偏少，但温度偏低对降水偏多的正贡献大于水汽偏少的负贡献，两者的净贡献为正，因此，冷空气活动主导降水。在较高层（600 hPa 及以上），中南部地区水汽偏多、温度偏高，但水汽偏多对降水的正贡献大于温度偏高的负贡献，因此，水汽输送主导降水。在中层（700 hPa），干冷空气和暖湿空气混合导致，中南部地区水汽偏多、温度偏低，两者均有利于空气饱和，对降水均起正作用；计算结果显示，水汽的贡献略强于温度的贡献。
2008년1월10일—2월2일아국중남부지구발생료엄중적저온우설빙동재해。해문분석차차과정적랭공기활동화수기수송，비교량자재강수형성중적상대중요성。이용문중정의적량개삼량，가이직접비교수기화온도저량개량재강수중소기적작용，병비교량자작용적상대중요성。결과표명：재저층（850 hPa 급이하），아국중남부지구온도편저、수기편소，단온도편저대강수편다적정공헌대우수기편소적부공헌，량자적정공헌위정，인차，랭공기활동주도강수。재교고층（600 hPa 급이상），중남부지구수기편다、온도편고，단수기편다대강수적정공헌대우온도편고적부공헌，인차，수기수송주도강수。재중층（700 hPa），간랭공기화난습공기혼합도치，중남부지구수기편다、온도편저，량자균유리우공기포화，대강수균기정작용；계산결과현시，수기적공헌략강우온도적공헌。
The severe cryogenic freezing rain and snow disastrous weather occurrs in central-southern China from 10 Jan to 2 Feb in 2008,which lasts for nearly a month,causes huge social and economic impacts.The wa-ter vapor supply and the cold air surges of this disaster are investigated,and their effects on the formation of the heavy snowstorm are performed.The abnormality of the atmospheric circulation is that the blocking high remains stable in high latitudes of the Northern Hemisphere,the western Pacific subtropical high is more north than normal and the south branch trough is active.In this process,cold air continuously trans-ports from north to central-southern China,forming a high isentropic potential vorticity center.At the same time,there is also strong water vapor continuously transports to north,the integrated water vapor is more than normal in the central-southern China,but at 850 hPa and levels below,the moisture is less.At different levels,anomalous temperature and moisture are different.From low layer to high layer,the air temperature change from abnormally low to abnormally high.The moisture increases and turns into more than normal at 700 hPa.Some methods are defined to examine whether moisture and temperature both play positive roles in this event.Results indicate that at 850 hPa and levels below,although warm and moist air transport from the south,dry and cold air transport from the north is very strong,so the abnormally low air temperature caused by the cold air surges dominates the abnormally high relative humility,and the pre-cipitation is more than normal,resulting in less moisture is less than normal,but this negative effect is weaker than the positive effect of abnormally lower air temperature.On the contrary,at 600 hPa and lev-els above,although the dry cold air transport from north,the warm and wet air from south is very strong, the abnormally more water vapor dominates the heavy precipitation,the air temperature is warmer than normal,and it has a negative effect at 700 hPa,the result of the blend of the warm and moist air from the south with the dry and cold air from the north is that the air over the central-southern China is moister while colder than normal.They both have positive contributions to the heavy snowstorm.It shows from calculation that at this level,the moistness of the air contributes more than the coldness of the air.