CAJ | 학술논문

文章根据西藏山南地区近30年(1981～2014年)6个有人气象观测站的大风资料,对山南地区的大风日数时空分布特征进行分析,并运用线性回归方法对大风日数和年代变化进行建模,得出其拟合关系.探讨了大风天气的季节变化特征和年际变化特征,并对山南地区大风天气的成因进行了分析.结论为:①山南地区的大风日数空间分布不均匀,其中位于西部的浪卡子站和和南部的隆子站大风日数最多,平均每年出现52d,而位于沿江一线的站点大风日数偏少,平均每年出现10～20d;②浪卡子和隆子两个代表站的大风分布具有明显的季节变化特征,其中冬季和春季是两个站点最容易出现大风天气的时段,而夏、秋两季大风天气较为少见;③两个代表站点的大风日数随着年代的推进均呈现减小趋势,其中隆子站比浪卡子站大风日数减小得更快,减少率分别为1.7d/a和0.8d/a;④西藏山南地区大风天气的成因主要包括:低空急流、温度平流和地形因素.由于山南地区冬、夏两季正处在500hPa天气图上的两支急流之间,动量的下传有利于大风天气的维持,而高纬冷空气和南支槽前的暖湿气流活动频繁,又加强了该区域气压梯度和温度梯度,使风力加大.
문장근거서장산남지구근30년(1981～2014년)6개유인기상관측참적대풍자료,대산남지구적대풍일수시공분포특정진행분석,병운용선성회귀방법대대풍일수화년대변화진행건모,득출기의합관계.탐토료대풍천기적계절변화특정화년제변화특정,병대산남지구대풍천기적성인진행료분석.결론위:①산남지구적대풍일수공간분포불균균,기중위우서부적랑잡자참화화남부적륭자참대풍일수최다,평균매년출현52d,이위우연강일선적참점대풍일수편소,평균매년출현10～20d;②랑잡자화륭자량개대표참적대풍분포구유명현적계절변화특정,기중동계화춘계시량개참점최용역출현대풍천기적시단,이하、추량계대풍천기교위소견;③량개대표참점적대풍일수수착년대적추진균정현감소추세,기중륭자참비랑잡자참대풍일수감소득경쾌,감소솔분별위1.7d/a화0.8d/a;④서장산남지구대풍천기적성인주요포괄:저공급류、온도평류화지형인소.유우산남지구동、하량계정처재500hPa천기도상적량지급류지간,동량적하전유리우대풍천기적유지,이고위랭공기화남지조전적난습기류활동빈번,우가강료해구역기압제도화온도제도,사풍력가대.
The spatial and temporal distribution characteristics of windy days were analyzed based on the 30 years data collected from 6 meteorological stations located in the Shannan Prefecture. The seasonal and interan-nual variation of windy weather were discussed based on the numbers of strong windy days and its changes in year to year with linear regression model, and the causes of the windy weather in Shannan Prefecture was ana-lyzed as well. The results showed that①an uneven special distribution of gale days in Shannan Prefecture and the maximum number of gale days appeared in the Langkazi station and the Longzi station with an average of 52d in a year, and a less number of gale days appeared in the stations located in along the river with an average of 10-20d in a year;②there was significant seasonal variation in gale distribution at Langkazi station and Longzi sta-tion and the windy weather appeared in spring and winter but it rare in summer and autumn;③the number of windy days in the two stations mentioned above showed a decreasing trend with the deducing rates 0.8d/a and 1.7d/a in different years respectively; ④ low-level jet, thermaladvection and topography would be The main causes of the windy weather in Shannan Prefecture.