利用常规观测资料对1991〜1996年江淮地区梅雨大暴雨期的高、低层流场进行合成诊断分析.结果表明,梅雨期暴雨时,在对流层上部,由于青藏高压向东扩,在高压东侧出现偏北大风轴,由此构成的高空辐散区随着高压的东移而东移,它常常位于低空急流前端的上空,形成上层东北风,下层西南风的特殊耦合关系.
ZHAIGuo-qing(翟国庆), GAOKun(高坤)
doaj +2 more sources
分析了 2013年高考期间(6月7日~8日)的一次暴雨过程,对其预报技巧进行探讨.此次暴雨过程是江淮气旋东移所致,高空冷槽前的正涡度平流、低层横向切变使地面气旋发展,槽上冷平流使槽发展加深.强降水主要出现在低压的东南象限、700 hPa切变线南侧、低空急流轴的左前侧,强降水区还与低层暖湿舌北侧假相当位温密集区和水汽通量散度辐合区相吻合.做高考决策预报服务过程中,当数值预报出现严重分岐时,可通过分析上游的天气系统来确定数值预报初始场的可靠性,从而得出预报结论.
HECaifen(何彩芬) +3 more
doaj +2 more sources
应用自动站和NCEP 1°×1°再分析资料,对2010年7月24日发生在东南沿海的一次大暴雨过程的湿位涡场进行了诊断分析.结果表明:鞍形场低层东南风低空急流输送的暖湿气流和对流层中低层来自东北方向的冷空气相互交汇是此次大暴雨发生的触发因子,大暴雨期间暴雨区上空对流层中低层等θse线较稀疏且陡立,大气对流稳定度较低,有利于湿斜压涡度发展,大暴雨发生在600 hPa上MPV、MPV1和MPV2正负过渡带附近,MPV1下负上正垂直叠加配置是暴雨发生发展的有利形势,湿位涡在900 hPa以下具有MPV1为负 ...
ZHANGLingjie(张灵杰)
doaj +2 more sources
Study on the long sustaining mechanism after typhoon “Haikui” landfall(1211号台风“海葵”登陆后长久维持机理探讨)
利用2.5 °×2.5°的NCEP再分析资料、实况监测资料、卫星云图等资料,从大尺度环流背景、下垫面、冷空气作用和物理量场诊断等方面对典型个例1211号台风进行了分析,寻找登陆台风(TC)强度变化的预报着眼点.结果表明,中低空急流既是“海葵”主要的湿能源,也是动能来源之一,中纬度强锋区向“海葵”靠近使TC的动能机制得到持续加强,加强了对流,从而加强了降水的潜热释放,为变性后TC的维持和发展提供了能量,“海葵”登陆后最大的垂直风切变一直分布在TC南北两侧,这样的对称结构对TC垂直环流的维持更加有利 ...
HUANGLinglin(黄玲琳) +4 more
doaj +2 more sources
Analysis of environmental conditions and characteristics of convective system evolution of a Mei-Yu Front heavy rainstorm in southern Jiangsu [PDF]
Affected by the Mei-Yu Front and the mesoscale vortex on the Mei-Yu Front, a heavy rain event occurred in Suzhou on 6 July, 2020, and caused disasters such as urban waterlogging.
Lanjun ZOU +4 more
core +1 more source
The role and characteristics of low-level jet during a persistent rainstorm in Guangxi [PDF]
In 2022, Guangxi experienced the strongest Dragon Boat Precipitation since the founding of the People's Republic of China. The persistent rainstorm process from 17 June to 22 June 2022 had large accumulations and overlapping falling areas, leading to ...
Hao QIN +4 more
core +1 more source
Structural evolution characteristics and cause analysis of heavy rain of transition typhoon "Maysak" [PDF]
Typhoon "Maysak" (2009) was formed of the East ocean in the Philippines, then moved north along the coastal waters of China and continued to strengthen, reaching a super typhoon at its strongest.
Li REN
core +1 more source
Synoptic conditions and radar characteristics for elevated thunderstorm during a snowstorm event in Henan Province [PDF]
A snowstorm event followed by the elevated thunderstorm occurred in Henan Province from February 24 to 25 in 2021. The operational forecast of all meteorological stations failed to capture the thunderstorm of this event, with the snowfall being ...
Guoan WANG +3 more
core +1 more source
Quantitative analysis of water vapor budget of a persistent rainstrom event in Tongren of Guizhou Province [PDF]
This paper focus on revealing the features of the water vapor transport, water vapor budget and the contribution percentage of water vapor source regions of the persistent rainstorm in Tongren from July 13th to 16th, 2014 based on precipitation ...
Chunyan LV +5 more
core +1 more source
Assessment of multi-source observation merged 1 km-grid precipitation product during the disastrous rainstorms in Guangdong [PDF]
This paper aims to assess the latest 1 km-grid Analysis Real Time (ART_1 km) precipitation product developed by the National Meteorological Information Center of China Meteorological Administration (CMA), which can provide great support for disaster ...
Chunyan ZHANG +6 more
core +1 more source

