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0604号强热带风暴碧利斯对云南的影响及维持机制 被引量:23
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作者 鲁亚斌 普贵明 +1 位作者 解明恩 张腾飞 《气象》 CSCD 北大核心 2007年第11期49-57,共9页
应用MICAPS资料及FY-2C卫星云图,通过天气分析与诊断分析,探讨了0604号强热带风暴碧利斯路径西偏南的原因,对造成云南的暴雨过程进行了分析并研究了这次登陆强热带风暴长久维持不消的物理机制。结果表明:黄海副高南落加强西伸与大陆高... 应用MICAPS资料及FY-2C卫星云图,通过天气分析与诊断分析,探讨了0604号强热带风暴碧利斯路径西偏南的原因,对造成云南的暴雨过程进行了分析并研究了这次登陆强热带风暴长久维持不消的物理机制。结果表明:黄海副高南落加强西伸与大陆高压合并加强,高压南侧东北风的牵引作用,是"碧利斯"路径西偏南的主要原因;"碧利斯"造成的云南强降水落区分布在热带低压倒槽前东北风急流区内水汽辐合中心区域,并且与700hPa湿Q矢量辐合区对应较好,热带低压影响期间,大气曾具有湿中性垂直运动结构,具备有利于暴雨系统发展的环境条件;"碧利斯"登陆后长时间和一支深厚的西南急流保持联结,是其长久维持不消的主要因素。西南季风云系卷入热带低压,增强了热带低压的水汽和能量输入,是热带低压得以长久维持并造成云南强降水的另一重要原因。南亚高压在热带低压活动期间增强,高层辐散场的增强,低层辐合、高层辐散的结构,与西南急流相联系的垂直正涡度的维持,有利于热带低压的维持,登陆后的热带低压有向高空强辐散区方向移动的趋势。 展开更多
关键词 强热带风暴 路径 强降水 西南急 流物理机制
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Characteristic Analysis of One Heavy Precipitation Synoptic Process in the South-west of Shandong Province 被引量:1
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作者 黄玉芳 王玮 张翠英 《Agricultural Science & Technology》 CAS 2012年第2期393-396,共4页
[Objective] This paper aimed to explore the formulation mechanism of one heavy precipitation synoptic process in the south-west of Shandong Province from June 16th to June 17th in 2010. [Method] Based on information o... [Objective] This paper aimed to explore the formulation mechanism of one heavy precipitation synoptic process in the south-west of Shandong Province from June 16th to June 17th in 2010. [Method] Based on information of circulation forms and physical quantity field, data of radar echo evolution and numerical prediction test, a heavy precipitation synoptic process in southwest Shandong during June 16th to June 17th in 2010 was analyzed to explore the formation mechanism of this synoptic process. [Result] The results showed that under the condition of relatively large circulation radial degree in eastern China, high-altitude cold vortex in Mongolia split, moved towards the south and impacted southwest air current at the edge of subtropical high from the west side. Cold vortex and shear line at the edge of subtropical high were the major impact system for the formulation of heavy precipitation synoptic process. The transportation of the southwest jest stream to the warm moist airflow provided water vapor conditions for the heavy precipitation, the high and low level jet stream and low level shear line provided strong dynamic lifting for this precipitation. [Conclusion] This study provided reference for heavy precipitation forecast. 展开更多
关键词 Heavy precipitation Shear line Southwest jet stream
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Recent Change of the South Asian High
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作者 YANG Kai-Qing JIANG Da-Bang 《Atmospheric and Oceanic Science Letters》 CSCD 2014年第4期330-333,共4页
This paper investigates the variability of the summer (May-September) South Asian Iligh (SAIl) for the period 1979-2012. Results show that the intensity and the area of the summer SAH decreased around 2002 at the ... This paper investigates the variability of the summer (May-September) South Asian Iligh (SAIl) for the period 1979-2012. Results show that the intensity and the area of the summer SAH decreased around 2002 at the decadal scale; and the East Asian westerly jet suppressed at the north edge of the SAH, which is consistent with the SAH variation. The precipitation pattern over eastern China also shifted during the same periods, with increased rainfall in the Huang-Huai River region and South China and decreased rainfall in the Yangtze River region. The relationship between the two variations is evidently strengthened via changes in moisture flux. 展开更多
关键词 South Asian High decadal variation
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