干旱区生态环境知识资源中心(Arid): 毛乌素沙漠东部边缘一次雹暴三维结构的观测分析

Arid

	毛乌素沙漠东部边缘一次雹暴三维结构的观测分析
其他题名	Observational Analysis on the of a Hailstorm in the Eastern 3-Dimensional Structure Part of Maowusu Desert
	井喜 1; 井宇 2; 李明娟 3; 屠妮妮 4; 贺文彬 1; 杜继稳 3; 张人禾 5
ISSN	1000-0534
出版年	2008
卷号	27 期号:5 页码:1119-1130
中文摘要	利用新一代天气雷达和M1CAPS提供的实况资料（包括用实况资料计算的其它物理量），对2006年7月27日发生在榆林市西北部部分乡镇的一次雹暴天气过程进行了连续的监测和分析。诊断分析表明：当日08：00，大气层结是稳定的，但925hPa湿正压场上生成从东南方向伸入雹区的窄的强对流不稳定舌；雹暴发生前2h，雹区地面邻近上游生成中beta尺度能量比高值中心和反映弱冷空气活动的中口尺度能量比低值舌；雹暴的发生也伴随雹区对流层低层大气湿斜压性的增强、边界层温度出现跃升等现象；中尺度纬向次级环流圈的形成，为雹暴的发生、发展和维持提供了动力条件。雷达反射率因子分析表明，强冰雹狂风是由超级单体风暴引发的，超级单体风暴是由中beta尺度小钩状回波和由干侵入引发的新生中gamma尺度强对流单体在钩状区合并而形成。超级单体风暴具有独特的动力学特征：除了伴随一个持久深厚的中气旋外，对流层低层人流急流持续时间长达50min，钩状区近地层出现未曾见过或罕见的（由强下沉气流产生）中beta尺度环形辐散区和环形辐散区向外扩展的特征。在0．5°仰角速度场，雹暴区气流经历了由径向辐合、气旋性辐合、气旋性旋转、再到径向辐合的演变过程。
英文摘要	A hail storm weather event occurred in northwestern Yulin on July 27, 2006, was continuously monitored and analyzed by using real time data provided by the new generation weather radar and MICAPS observed data including other physical quantity calculated upon them. The diagnostic analysis shows that the atmospheric stratification was stable at 08：00 that day, but a narrow strong convectivelyinstable tongue generated in the moist barotropic field at 925 hPa level extending from southeast to hail zone. In 2 hours before the hail storm near the up neighbor of the hail zone, there emerged a beta mesoscale high energy ratio center and a beta meso-scale low energy ratio tongue reflecting the weak cold air movement. The hailstorm also developed with the strengthening of moist atmospheric baroclinicity in lower troposphere and temperature leap in boundary layer. Dynamic situation for generating and maintaining hail storm derived from formation of the mesoscale secondary circulation along latitude. Radar reflectivity analysis indicates that strong hail and high wind were induced by the super cell storm which was a combination of the beta mesoscale hook echo and a new gamma mesoscale evere convective cell generated in the hook area by dry invasion. The super cell storm has unique dynamical features, except which accompanied by a long-lasting deep mesoscale vortex, in lower troposphere, the inflowing jet stream maintained full 50 minutes, the rare beta mesoscale ring divergence emerged in hook area near surface level and represented features of outward expansion. In 0.5°velocity field, stream in hailstorm zone experienced a evolution of longitudinal convergence, eyclonical convergence, cyclonical twist and longitudinal convergence till the end.
中文关键词	毛乌素沙漠 ; 雹暴 ; 雷达回波
英文关键词	Maowusu desert Hailstorm Radar echo
语种	中文
国家	中国
收录类别	CSCD
WOS类目	METEOROLOGY ATMOSPHERIC SCIENCES
WOS研究方向	Meteorology & Atmospheric Sciences
CSCD记录号	CSCD:3453207
来源机构	兰州大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/222475
作者单位	1.陕西省榆林市气象局, 榆林, 陕西 719000, 中国; 2.兰州大学大气科学学院, 兰州, 甘肃 730000, 中国; 3.陕西省气象局, 西安, 陕西 710015, 中国; 4.中国气象局成都高原气象研究所, 成都, 四川 610071, 中国; 5.中国气象局中国气象科学研究院, 北京 100081, 中国
推荐引用方式 GB/T 7714	井喜,井宇,李明娟,等. 毛乌素沙漠东部边缘一次雹暴三维结构的观测分析[J]. 兰州大学,2008,27(5):1119-1130.
APA	井喜.,井宇.,李明娟.,屠妮妮.,贺文彬.,...&张人禾.(2008).毛乌素沙漠东部边缘一次雹暴三维结构的观测分析.,27(5),1119-1130.
MLA	井喜,et al."毛乌素沙漠东部边缘一次雹暴三维结构的观测分析".27.5(2008):1119-1130.