CAJ | 학술논문

以雷达探测资料为主，结合探空资料、天气图和地面灾情，对2013年7月7日苏皖2省交界处的龙卷进行了分析。结果表明：⑴龙卷是在低层有明显的风切变的有利形势下产生的，环境场具有较强的对流不稳定性、大的低层垂直风切变和较低的对流凝结高度。⑵反射率因子在60 dBZ左右；速度图上有正负速度对，低仰角的转动速度＞13 m·s-1；近地面相邻像素间速度差＞11 m·s-1，满足TVS速度差的最低阈值要求；天长龙卷和高邮龙卷都是发生在风暴发展极为旺盛后的1～2个体扫内，也发生在VIL比较大而下降到40～45 kg·m-2左右之时；天长龙卷发生在连续多个TVS之后，高邮龙卷发生在中气旋下降和TVS出现之时。风暴参数和TVS参数表征的指标越强越有利于龙卷的发生，影响范围也越大。⑶这次龙卷验证了出现龙卷的各项雷达识别指标：最强回波在6 km以下；有气旋性辐合，低仰角旋转速度＞13 m·s-1；既探测到中气旋也探测到TVS。⑷对经典龙卷概念模型进行简化，建立的简易模型证实了传统的龙卷风暴概念模型，给出了龙卷发生在TVS靠近上升气流一侧的解释。
이뢰체탐측자료위주，결합탐공자료、천기도화지면재정，대2013년7월7일소환2성교계처적룡권진행료분석。결과표명：⑴룡권시재저층유명현적풍절변적유리형세하산생적，배경장구유교강적대류불은정성、대적저층수직풍절변화교저적대류응결고도。⑵반사솔인자재60 dBZ좌우；속도도상유정부속도대，저앙각적전동속도＞13 m·s-1；근지면상린상소간속도차＞11 m·s-1，만족TVS속도차적최저역치요구；천장룡권화고유룡권도시발생재풍폭발전겁위왕성후적1～2개체소내，야발생재VIL비교대이하강도40～45 kg·m-2좌우지시；천장룡권발생재련속다개TVS지후，고유룡권발생재중기선하강화TVS출현지시。풍폭삼수화TVS삼수표정적지표월강월유리우룡권적발생，영향범위야월대。⑶저차룡권험증료출현룡권적각항뢰체식별지표：최강회파재6 km이하；유기선성복합，저앙각선전속도＞13 m·s-1；기탐측도중기선야탐측도TVS。⑷대경전룡권개념모형진행간화，건립적간역모형증실료전통적룡권풍폭개념모형，급출료룡권발생재TVS고근상승기류일측적해석。
Based on radar data,sounding data,weather maps and ground damage inquiry,a tornado storm which occurred on 7 July 2013 in the junction of Jiangsu and Anhui Province was analyzed.The results are as follows:(1)The tornado occurred under the fa-vorable situation with obvious wind shear at the low layer,and there were higher convective instable energy,bigger vertical wind shear at the low layer and lower convective condensation level in the environment field.(2)The reflectivity facter was about 60 dBZ,and there were positive and negative velocity on the velocity map,and the rotational speed of low elevation was greater than 13 m/s.The tornado occurred within 1 -2 body scans after a storm developing mightily or when bigger VIL falled and reached about 40-45 kg· m-2 .Tianchang tornado occurred after continuous multiple TVS,and Gaoyou tornado occurred when mesoscale cyclone declined and TVS occurred.The stronger the storm and TVS parameters were,the more tornado ocuurred,and its influence area was bigger.(3) The radar indicators of distinguishing tornado occurrence were verified through the tornado,for instance,the strongest echo was under the height of 6 km,there were cyclonic convergence and rotation speed of low elevation was more than 13 m/s,the mesoscale cyclonic and TVS were detected.(4)The traditional conceptual model of tornado was simplified,and the simple model explained the phenome-non about tornado occurring in TVS near the side of ascending flow.