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Analysis on "96. 8" heavy rainstorm Process in Handan

Meteorological and Environmental Research 2012年第8期3卷 18-23页

作者： ZHANG Yan-li YANG Xue-chuan WANG Ga SONG Xiao-hui TIAN Xiu-xia Shexian Meteorological Bureau in Hebei Province Shexian 056400China Handan Meteorological Bureau in Hebei Province Handan 056001China

[ ObjEtive] The research aimed to analyze ＂96.8＂ heavy rainstorm process causing flood disaster in Handan. [ Method] Based on ac- tual situation data, satellite cloud data and NCEP reanalysis data in the first dekad of August in 1996, ＂96.8＂ heavy rainstorm process causing flood disaster in Handan was analyzed to understand occurrence reason of the flood disaster. [ Result] Two meso-scale convective cloud clusters which developed and went north in turn caused ＂96.8＂ heavy rainstorm in Handan. Typhoon and inverted trough were main weather systems induced flood disaster in Handan. In going north process of the low-level jet, due to blocking of the subtropical high, water vapor and energy accumulated in Handan, providing material basis for formation of the heavy rainstorm. Development and eastward movement of the short-wave trough at middle lati- tude and continuous invasion of the reflux weak cold air at the low layer were direct reason for triggering generation and development of the convec- tive cloud cluster, and further causing continuous rainstorm. Wet layer over the rainstorm zone was deep and thick. Meridional distribution of the wet zone was wider than latitudinal distribution. South China Sea and Bay of Bengal were water vapor sources for the rainstorm zone. In the whole rain- storm period, it was convergence at low layer and divergence at high layer in the rainstorm zone. It was positive vorticity at low layer and negative vorticity at high layer. Precipitation intensity changed as convergence and divergence. rainstorm zone had strong ascending motion. As strengthe- ning and uplifting of the ascending motion strong center, strong precipitation also strengthened. rainstorm center was near the biggest vertical ve- locity center. Strong precipitation changed as vertical ascending motion. [ Conclmion] The research provided scientific basis for disaster prevention and reduction and decision-making service.

关键词： heavy rainstorm No. 9608 strong typhoon Process analysis Handan China

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Genetic Analysis of a heavy rainstorm on June 29,2006 in Henan Province

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Meteorological and Environmental Research 2012年第12期3卷 37-41页

作者： CHEN Jing Henan Provincial Meteorological Information Network and Technology Support Center

Based on conventional radiosonde data, surface encrypted observation data and so forth, the diagnostic analysis of a heavy rainstorm in the central and east of Henan Province on June 29, 2006 was carried out from the aspects of its large-scale background, environmental field and physical characteristics. The results showed that under the effect of a favorable large-scale environmental field, the rainstorm was caused by a mesoscale system. The high-east and low-west circulation pattern, the eastward movement of high-level low trough, low-level shear lines and strengthening of low-level jet streams directly resulted in the occurrence of the heavy rainstorm.

关键词： heavy rainstorm High-east and low-west circulation pattern Low-level shear line Jet streams at high and low altitude China

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Analysis on the Reason of Local heavy rainstorm Forecast Error in the Subtropical High Control

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Meteorological and Environmental Research 2011年第2期2卷 13-17页

作者： LV Xiao-hua DAI Jin WU Jin-hua LI Wen-ming Shaoyang Meteorological Bureau in Hunan Province Shaoyang 422000China Changde Meteorological Bureau in Hunan Changde 415000China

[Objective] The research aimed to study the reason of local heavy rainstorm forecast error in the subtropical high control. [Method] Started from summarizing the reason of forecast error, by using the conventional ground observation data, the upper air sounding data, T639, T213 and European Center (ECMWF) numerical prediction product data, GFS precipitation forecast product of U.S. National Center for Environmental Prediction, the weather situation, physical quantity field in a heavy rainstorm process which happened in the north of Shaoyang at night on August 5, 2010 were fully analyzed. Based on the numerical analysis forecast product data, the reason of heavy rainstorm forecast error in the subtropical high was comprehensively analyzed by using the comparison and analysis method of forecast and actual situation. [Result] The forecasters didn’t deeply and carefully analyze the weather situation. On the surface, 500 hPa was controlled by the subtropical high, but there was the weak shear line in 700 and 850 hPa. Moreover, they neglected the influences of weak cold air and easterlies wave. The subtropical high quickly weakened, and the system adjustment was too quick. The wind field variations in 850, 700 and 500 hPa which were forecasted by ECMWF had the big error with the actual situation. It was by east about 2 longitudes than the actual situation. In summer forecast, they only considered the intensity and position variations of 500 hPa subtropical high, and neglected the situation variations in the middle, low levels and on the ground. It was the most key element which caused the rainstorm forecast error in the subtropical high. The forecast error of numerical forecast products on the height field situation variation was big. The precipitation forecasts of Japan FSAS, U.S. National Center for Environmental Prediction GFS, T639 and T213 were all small. The humidity field forecast value of T639 was small. In the rainstorm forecast, the local rainstorm forecast inde

关键词： heavy rainstorm Subtropical high Forecast error Reason analysis China

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Analysis of a heavy rainstorm in Jincheng in August of 2010

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Meteorological and Environmental Research 2011年第9期2卷 28-31,34页

作者： CHENG Hai-xia ZHANG Hong-xia ZHANG Yan WANG Jian-ming Jincheng Meteorology Bureau of Shanxi Province Jincheng 048026China Qinshui Meteorological Bureau of Shanxi Province Qinshui 048200China

[Objective] A heavy rainstorm in Jincheng in August in 2010 was expounded. [Method] By dint of the conventional meteorological data, and automatic weather station data, and Doppler radar data, one severe torrential rainstorm was analyzed from the aspect of circulation background, physical quantity field, satellite cloud image, and radar echo, etc. [Result] The rainstorm was in the circulation field of low-west-east-obstruction, and was formed under the middle and low layer shear line and low air torrent situation. The low layer shear and convergence of wind favorable to the lift of unsteady air around Jincheng. The intrusion of cold air in the low layer of convective layer and above the ground trigered such convective weather. The torrent of the low air in the southwest sent abundant water vapor to the rainstorm area. The high temperature and the moisture accumulated much unsteady energy for the generation of rainstorm. The main precipitation system of this process was the singular of convective echo which was stimulated by the ground mesoscale shear line. Under the guidance of southwest airstream of the low and middle air, the convective echo singular formed train effect by moving towards Jincheng and formed large rainstorm. Doppler radar data suggested that the characteristics of the generation, development and movement of this mesoscale rainstorm system. The strong precipitation center was in the large value area of the gradient in the back of the TBB center. [Conclusion] The study provided references for the forecast and pre-warning of temporary rainstorm of such kind.

关键词： heavy rainstorm Weather process Mesoscale shear Convective echo cell Train effect China

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Study on Mesoscale Circulation Characteristics of heavy rainstorm in Wangmo County in Qianxinan on June 6,2011

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Meteorological and Environmental Research 2011年第11期2卷 13-16,22页

作者： CUI Ting1,2,WU Gu-hui3,ZHAO Yu-jin2,YANG Ling2,ZHANG Qiang-yi2 1.College of Atmospheric Sciences,Lanzhou University,Lanzhou 730000,China 2.Qianxinan Meteorological Bureau,Xingyi 562400,China 3.Guizhou Meteorological Observatory,Guiyang 550002,China

[Objective] The aim was to analyze the causes of '6.06' heavy rainstorm in Wangmo County in Qianxinan.[Method] By dint of NCEP/NCAR 1°×1° reanalysis data,FY-2E TBB data,seven ground elements and two elements from automatic station data,the main influential system and all kinds of physical quantity field features of heavy rainstorm in upper reaches of Wangmo County in Qianxinan from the evening on 5 June to 08:00 on 6 June in 2011 were studied.[Result] The rainstorm was the result of cold air,which was provided by 850 hPa cold shear line and ground radiation line,and warm and wet airstream on the northwest edge of subtropical *** was the main reason for such heavy *** warm and wet airstream in middle lower part provided sufficient water vapor for the *** 850 hPa water vapor flux divergence center moved from north to south along ground convergence line to *** location and water vapor flux as well as convergence center were *** rainfall intensity also was consistent with the amount of water vapor flux and water vapor convergence.[Conclusion] The study provided reference for the report of heavy rainstorm.

关键词： Wangmo County heavy rainstorm Shear line Subtropical high pressure Ground convergence line China

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一次冷式切变线引发区域性大暴雨过程分析(英文)

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Meteorological and Environmental Research 2010年第2期1卷 13-15,23页

作者：张洪英王英山东省淄博市气象局山东淄博255000 山东省菏泽市气象局山东菏泽274000

By using the conventional data,the rainfall data in the automatic weather station and so on,a regional heavy rainstorm which happened in the northwest and north central region of Shandong Province during May 9-10,2009 was *** results showed that the cooling shear line in low altitude was the main system which caused the heavy *** rainstorm mainly happened on the left front of jet stream in low altitude,the right of cooling shear line in low altitude and the northeast quadrant of *** southwest jet stream in the west of subtropical high established a water vapor passage from the South China Sea to the center of North *** not only provided warm and wet air and energy for the development of heavy rainstorm,but also was the necessary condition which shear line in low altitude stagnated for a long *** frontal cyclone was the trigger mechanism of *** northeast wet and cold air joined with the southwest warm and wet air in Shandong after the front,which prompted the development of convection and the release of instable energy to form the rainstorm.

关键词： Shear line Southwest vortex Cold air heavy rainstorm China

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“海高斯”减弱环流引发的大暴雨天气诊断分析(英文)

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Meteorological and Environmental Research 2010年第10期1卷 1-4,7页

作者：林两位黄建忠王莉萍洪晓湘福建省漳州市气象局福建漳州363000

The large-range heavy precipitation occurred in the central-southern coast of Fujian on October 6,*** using the conventional meteorological data and NCEP 1°×1° 6 h one time analysis data,we analyzed,diagnosed and discussed the reasons of this heavy rainstorm occurrence and *** results showed that this heavy rainstorm weather process was mainly formed by the low-pressure system which was remained after ' Higos' *** low-pressure system was excited by the weak cold air in the low layer which was brought by 500 hPa westerly *** common effect of southwest jet stream in the low altitude in the southeast of low pressure and the northerly airflow in the northwest made that the low-pressure circulation strengthened and *** calculation gained the physical quantity field configuration which was favorable for the appearance of heavy *** analysis on the relative helicity of windstorm showed that the distribution and the time evolution of helicity had the good corresponding relationship with the distribution and the time evolution of heavy *** intensity variation of helicity had the certain instruction significance on the rainstorm evolution.

关键词： heavy rainstorm Physical quantity field Diagnosis and analysis Helicity China

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Meteorological and Environmental Research 2021年第1期12卷 1-5页

作者： Qixue PAN Yaling XIE Yidong MO Yang CHEN Qiannan Meteorological Bureau Duyun 558000China Pingtang Meteorological Bureau Pingtang 558300China

Based on routine data of MICAPS system and data of regional automatic station,characteristics of similar environmental field for 4 heavy rainstorms of regional station in Luodian County near FAST in summer were *** was found that 4 heavy rainstorms of regional station had internal similarity:it maintained high-altitude situation of"high in west and low in east"from Lake Baikal to North China;the Western Pacific subtropical high was zonal;ridge line of subtropical high was near 15°N;θse at 850 hPa reached certain index value,showing that air mass had extremely strong warm and humid *** common influence of high-altitude trough,low-value system at low layer and weak cold air,heavy rainstorm occurred.

关键词： FAST Regional automatic station heavy rainstorm

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