摘要
利用石河子C波段多普勒天气雷达资料,对2010年6月28日下午发生在准噶尔盆地南缘石河子垦区北部沙漠边缘地带的强冰雹超级单体风暴的雷达回波演变特征进行了详细分析。结果表明,该超级单体风暴前进方向的右侧出现了弓形回波,左前侧和右后侧分别出现了"V"字型缺口;沿入流方向穿过最强回波位置的反射率因子垂直剖面呈现出典型的有界弱回波区、回波悬垂和有界弱回波区左侧的强大回波墙,最大回波强度出现在沿回波墙狭长区域的下部,其值达到70dBz;相应的径向速度上出现了中气旋,该中气旋的发展和维持使得超级单体弓形回波发展并维持;强冰雹发生在有界弱回波区、垂直累积液态水含量大值区和中气旋重合的区域内;可用中气旋提前30min预警短时冰雹,其反射率因子垂直剖面上的宽大有界弱回波及其回波悬垂和回波墙下部的强回波中心强度(70dBz)可作为预警大冰雹的预警指标。
Using C-band Doppler weather radar data in Shihezi,radar echo evolution characteristic of sever hail storm supercell in the southern edge of Junggar basin,the northern edge of the desert area Shihezi on 28 June 2010 is analyzed.The results showed that the right side of supercell storm forward appeared bow echo,and its rear left and right side respectively appeared ＇V＇ notch;the vertical profile of reflectivity along the inflow direction of the strongest echoes through the location showed the typical bounded weak echo area,the strong echo wall on the left of echo overhang and bounded weak echo area,the maximum echo intensity appeared in the narrow area along the lower part of echo wall,and its value is 70 dBz;the radial velocity presented mesocyclone,the development and maintenance of mesocyclone made the supercell bow echo development and maintenance;severe hail occurred in weak wave zone,large value of the vertically integrated liquid water content and the overlap region in the cyclone area;mesocyclone can warn the hail ahead 30 min,the bounded weak echo of vertical profile for reflectivity and its echo hanging and strong echo center intensity（70 dBz） under echo wall take as an early warning indicator.
出处
《高原气象》
CSCD
北大核心
2011年第6期1681-1689,共9页
Plateau Meteorology
基金
公益性行业(气象)科研专项(GYHY201006012)
中国沙漠气象科学研究基金项目(sqj2010013)共同资助
