CAJ | 학술논문

利用地面与高空实况观测资料，从高低空地面环流形势和部分物理量反映等方面对甘肃省中部2013年2月17—18日暴雪天气进行综合分析。结果表明：此次暴雪发生在新疆北部冷空气东移南下、高原上有强盛西南暖湿气流配合的有利环流形势下，主要降雪区与500 hPa辐合线相一致；水汽输送主要集中在500 hPa附近，700 hPa偏南气流的水汽输送只是有益的补充；对流层中层500 hPa有较深厚的上升运动，且上升运动极值出现和维持的时间与主要降雪时段一致；暴雪发生前在甘肃中部有较长时间的能量积聚，而冷空气的突然加速南压触发了本次暴雪。
이용지면여고공실황관측자료，종고저공지면배류형세화부분물리량반영등방면대감숙성중부2013년2월17—18일폭설천기진행종합분석。결과표명：차차폭설발생재신강북부랭공기동이남하、고원상유강성서남난습기류배합적유리배류형세하，주요강설구여500 hPa복합선상일치；수기수송주요집중재500 hPa부근，700 hPa편남기류적수기수송지시유익적보충；대류층중층500 hPa유교심후적상승운동，차상승운동겁치출현화유지적시간여주요강설시단일치；폭설발생전재감숙중부유교장시간적능량적취，이랭공기적돌연가속남압촉발료본차폭설。
By using the ground and high altitude data, and based on the reaction of high and low altitude circulation situation and some physical quantities, this study analyzed the blizzard occurring in central Gansu Province from February 17th to February 18th, 2013. The result showed that this blizzard occurred in this circulation situation:The cold air was eastward and moving down from north Xinjiang, running up against the strong southwest warm current from plateau?The major snow area was consistent with the 500 hPa convergence line, the vapor transportation focused on 500 hPa, and supplied on 700 hPa? A strong ascending motion appeared in the mid tropospheric near 500 hPa, and the appearance over time of extreme value was consistent with the snowfall time?There was a longer period of energy accumulation before the blizzard occurred, and the sudden acceleration of cold air triggered the blizzard.