|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | A Review of Research on Warm-Sector Heavy Rainfall in China显示文摘Warm-sector heavy rainfall (WSHR) events in China have been investigated for many years. Studies have investigated the synoptic weather conditions during WSHR formation, the categories and general features, the triggering mechanism, and structural features of mesoscale convective systems during these rainfall events. The main results of WSHR studies in recent years are summarized in this paper. However, WSHR caused by micro- to mesoscale systems often occurs abruptly and locally, making both numerical model predictions and objective forecasts difficult. Further research is needed in three areas:(1) The mechanisms controlling WSHR events need to be understood to clarify the specific effects of various factors and indicate the influences of these factors under different synoptic background circulations. This would enable an understanding of the mechanisms of formation, maintenance, and organization of the convections in WSHR events.(2) In addition to South China, WSHR events also occur during the concentrated summer precipitation in the Yangtze River-Huaihe River Valley and North China. A high spatial and temporal resolution dataset should be used to analyze the distribution and environmental conditions, and to further compare the differences and similarities of the triggering and maintenance mechanisms of WSHR events in different regions.(3) More studies of the mechanisms are required, as well as improvements to the model initial conditions and physical processes based on multi-source observations, especially the description of the triggering process and the microphysical parameterization. This will improve the numerical prediction of WSHR events. | Jianhua SUN Yuanchun ZHANG Ruixin LIU Shenming FU Fuyou TIAN | 2019 | Advances in Atmospheric Sciences2019，36，12： | 13 |
| 2 | Case studies on mesoscale structures of heavy rainfall system in the Yangtze River generated by Meiyu front显示文摘A heavy rainfall system was observed over the Yangtze River during Meiyu season by using dual-Doppler radar systems in the field experiment conducted by the project of National Fundamental Research Planning “Research on formation mechanism and the prediction theory of hazardous weather over China”. The three-dimensional mesoscale kinematic structure and process of a heavy rain on 22 and 23 July, 2002 are investigated by using the radial velocity and dual-Doppler radar technique. The results show that a southwest-northeast oriented rain band with the length of about 1000 km involves numbers of meso-β or meso-γ-scale convective cells with the size of 20―50 km. The heavy rain band in the middle reaches of the Yangtze River ex-ists in a low-level wind shear. The interaction between southwest low-level jet on the southern side of wind shear and east wind on the northern side formed the updraft. The wind disturbance, wind shear and convergence generate the convective action. The new cell developed in right rear flank of rain band and moved to the southwest wind area, where the vapor is abundant. This kind of echo can last a long time and developed well. The strong convective echoes are often ac-companied by the meso-γ-scale vortex and convergence. | LIU Liping1, RUAN Zheng1 & QIN Danyu2 1. Chinese Academy of Meteorological Sciences, Beijing 100081, China 2. Nanjing Institute of Meteorology, Nanjing 210044, China | 2005 | Science China Earth Sciences2005，48，8： | 11 |
| 3 | SIMULATION OF HEAVY RAINFALL IN THE SUMMER OF 1998 OVER CHINA WITH REGIONAL CLIMATE MODEL显示文摘The heavy rainfall in the summer of 1998 over China has been simulated with the NCCRegional Climate Model(RegCM_NCC).It was successful for RegCM_NCC to reproduce thelocation and seasonal shift of the seasonal rain belt in the summer of 1998 over China.The rainyseason in the summer of 1998 over China can be divided into 7 episodes,including the pre-summerrainy season in South China.the Meiyu onset over the Yangtze-Huaihe River Basin,shortappearance of North China rain season and the retreat of seasonal rain belt,the second Meiyuseason over the Yangtze River Valley,the rainy period over the Yellow and Huaihe River Valleyand the seasonal retreat of rain belt over North China.The shortcoming of the RegCM_NCC isover-estimation of precipitation amounts.The regions with large latent heat flux,upper soilmoisture and total runoff are located in the rainy area and move with the simulated rain belt duringthe different episodes.On the contrary,the regions with small sensible heat flux are located in thesimulated rainy area and move with the simulated rain belt during the different episodes. | 刘一鸣 丁一汇 | 2002 | Acta meteorologica Sinica2002，16，3： | 11 |
| 4 | NUMERICAL SIMULATION OF A MESOSCALE CONVECTIVE SYSTEM(MCS)DURING THE FIRST RAINY SEASON OVER SOUTH CHINA显示文摘Based on the NCEP/NCAR reanalysis data and observations collected during the SCSMEX,amesoscale convective system (MCS) occurring over South China during 23-24 May 1998 has beenstudied with a numerical simulation using the Fifth Generation Penn-State/NCAR MesosealeModeling System (MMS).The successful simulations present us some interesting findings.Thesimulated MCS was a kind of meso-β scale system with a life cycle of about 11 hours.It generatedwithin a small vortex along a cold front shear line.The MCS was characterized by severeconvection.The simulated maximum vertical velocity was greater than 90 cm s-1,and themaximum divergence at about 400 hPa.The rainfall rate of MCS exceeded 20 mm h-1.To theright of the simulated MCS,a mesoscale low-level jet (mLLJ) was found.A strong southwesterlycurrent could also be seen to the right of MCS above the mLLJ.This strong southwesterly currentmight extend up to 400 hPa.A column of cyclonic vorticity extended through most part of theMCS in the vertical direction.Additionally,the simulated MCS was compared favorably with theobservational data in terms of location,precipitation intensity and evolution. | 蒙伟光 王安宇 李江南 冯瑞权 古志明 | 2003 | Acta meteorologica Sinica2003，17，1： | 5 |
| 5 | A COMPARATIVE STUDY ON CHARACTERISTICS AND THERMODYNAMIC DEVELOPMENT MECHANISMS OF TWO TYPES OF WARMSECTOR HEAVY RAINFALL ALONG THE SOUTH CHINA COAST显示文摘Warm-sector heavy rainfalls along the south China coast from April to June during 2009-2014 can be divided into two main types based on their low-level circulations. Type I is the southerly pattern with meridional convergence line at the west of the Pearl River estuary, which is formed by the convergence of southeasterly, southerly, and southwesterly flows. Type II is the southwesterly pattern with a latitudinal convergence line at the east of the Pearl River estuary, which is formed by the convergence of westerly and southwesterly flows. Statistics on 6-hourly heavy rainfall events indicates that, during the afore-mentioned 6 years, there were on average 73.2 occurrences of the southerly pattern and 50.3 occurrences of the southwesterly pattern per year. After the onset of summer monsoon in the South China Sea, the occurrence frequencies of both patterns increase remarkably. The synthetic diagnosis of pattern circulation shows that, at 500 h Pa, for the southerly pattern, there is a broad warm high ridge, and a temperature ridge is behind the high ridge, which causes an obvious warm advection at the high ridge area. There is no frontal region. For the southwesterly pattern, the circulation is a weak trough with a temperature trough behind it. The position of the frontal region is near Yangzi River, and the south China coast is in the warm-sector of the frontal region. At the vertical cross-section of each of the two categories of heavy rainfall, there is a strong vertical motion center stretching to 400 hPa, where the convergence layer in the rainfall region is deep and with several vertical convergence centers overlapping one another. Both types of heavy rainfalls are with abundant water vapor, accompanied with deep convective instability energy layers, and with strong release of latent heat caused by condensation of water vapor. The release of latent heat leads to the warming-up and stretching of the air column, thus strengthens deep convergence and vertical velocity upward. There is a stronger latent heat-release in the southwesterly pattern than in the southerly pattern,while in the southerly pattern, the warm advection at middle and upper levels is stronger than the latent head release.To study the thermo-dynamic development mechanisms, weather research and forecasting model(WRF) numerical simulations are made and the results show that, in the two rainstorm regions, latent heat release warms up the air column, hence significantly increase the depth and strength of the vertical velocity. Moreover, the release of latent heat strengthens convergent circulation at lower levels and weakens divergent circulation at middle levels, whose influence can be as strong as 30%-50% of the wind circulation strength of the two types of the warm-sector heavy rainfall over the south China coast, and further enhances deep convection, promoting warm-sector storm development. | 苗春生 杨艺亚 王坚红 李萍 | 2018 | Journal of Tropical Meteorology2018，24，4： | 5 |
| 6 | NUMERICAL SIMULATION OF CLOUD MICROPHYSICAL CHARACTERISTICS OF LANDFALL TYPHOON KROSA显示文摘In this study,the super typhoon KROSA(2007)was simulated using a mesoscale numerical model Global and Regional Assimilation and Prediction System(GRAPES)with a two-moment mixed-phase microphysics scheme.Local rainfall observations,radar and satellite data were also used to analyze the precipitation structure and microphysical features.It was shown that low-level jets and unstable temperature stratification provided this precipitation process with favorable weather condition.Heavy rainfall centers were located in the north and east part of KROSA with the maxima of 6-hourly total rainfall during the simulation more than 100 mm.The quantities of column solid water and column liquid water were generally equivalent,indicating the important role of ice phase in precipitation formation.Results of CloudSat showed that strong convection occurred in the eyewall around the cyclonic center.According to the simulation results,heavy precipitation in the northeast part of the typhoon was mainly triggered by convective clouds,accompanied by the strongest updraft under the melting level.In the southwest part of KROSA,precipitation intensity was rather homogeneous.The ascending center occurred in high-level cold clouds,favoring the formation and growth of ice particles. | 花丛 刘奇俊 | 2013 | Journal of Tropical Meteorology2013，19，3： | 3 |
| 7 | A Study of Heavy Rainfall of 8-10 June, 1991 over Maharashtra, India显示文摘AStudyofHeavyRainfallof8-10June,1991overMaharashtra,IndiaA.K.Kulkarni,B.N.MandalandR.B.SangamAStudyofHeavyRainfallof8-10June,... | A.K.Kulkarni, B.N.Mandal and R.B.Sangam(Indian institute of Tropical Meteorology, Pune-411008, | 1994 | Advances in Atmospheric Sciences1994，11，3： | 2 |
| 8 | Mesoscale analysis and simulation of heavy rainfall in Shanghai urban area by using non-conventional data显示文摘In this paper, a local record severe rainfall since1949 occurring in the Shanghai urban area on 5-6 August,2001 is investigated by using non-conventional observationaldata provided by the '973' basic research project of China,including automatic meteorological stations data, wind pro-filer data, Doppler radar echoes and GMS5 satellite data andNCEP data. By analyzing, it is revealed: (1) the heavy rain-fall, caused by a serious of mesoscale βconvective cloudclusters developing inside the landing tropical depression(TD), occurred suddenly with the typical characteristics ofurban heavy rainfall disaster; (2) the landing tropical de-pression, moved eastward to Shanghai and re-intensifiedbefore entering the sea, was very favorable for the occur-rence of the heavy rainfall in Shanghai; (3) there may existsthe interaction of different scale systems between the tropicaldepression and mesoscale convective cloud clusters; and (4)the various advanced intensive data contribute importantlyto detect earlier and predict successfully the urban meteoro-logical disasters. | QI Linlin ZHAO Sixiong Institute of Atmospherie Physies. Chinese Academy of Sciences. Beijing 100029, China | 2003 | Chinese Science Bulletin2003，48，S2： | 2 |
| 9 | Numerical study on structure of meso-β scale rainstorm system during IOP523 of HUAMEX显示文摘One of the scientific goals of HUAMEX (Torrential Rainfall Experiment over Both Sides of the Taiwan Strait and Adjacent Area), a special project in the National '863' Scientific Project, is to reveal meso-β scale structure of heavy rainfall. However, limited by the observational instruments, the resolution of the data attained from the outfield scientific observation network cannot reveal the meso-β scale structure. A 36-h numerical simulation of heavy rainfall case from May 23 to May 24, 1998 during IOP523 of HUAMEX was performed by the mesoscale numerical model of PSU/NCAR MM5, and the meso-p scale structure of con-vective system was examined based on the model output in this note. The results point out that the meso-β scale features of the heavy rainfall are clear considerably at low, middle and upper levels, respectively. There is a strong ageostrophic feature between the geopotential height field and the wind field on the upper level. The vertical cross sections of 54 km coarse grid and 18 km | Qingli Wu Min Chen Hongqing Wang Zuyu Tao | 2002 | Chinese Science Bulletin2002，47，20： | 1 |
| 10 | INTEGRATED FRACTIONS SKILL SCORE FOR THE ASSESSMENT OF PRECIPITATION显示文摘Traditional skill scores(e.g., the threat score) used in the high-resolution verification of precipitation are affected by a 'double penalty' caused by slight spatial or temporal displacements, which can lead to misleading evaluations. The fractions skill score(FSS) is a popular spatial verificaiton measure that can be used to solve these problems. It can determine useful and skillful scores by neighborhood analysis, which can be used to monitor the performance of operational forecasts. However, the FSS provides different scores at each spatial scale and it is difficult to obtain a definite score for the assessment of precipitation to analyze the temporal variabilities of daily forecasts. We previously reported a modified FSS assessment method and showed that a particular analysis scale had a significant advantage in the verification of operational forecasts of precipitation. To compensate for the lack of artificial definition in the analysis scale, we report here a new integrated score that satisfies a Gaussian weight function to average the FSS over all scales. We describe the advantages of the new score in the verification of forecasts of daily and hourly precipitation, taking forecast products from the GRAPES regional model and quantitative precipitation estimation products from the National Meteorological Information Center during June and July 2017 and investigating the differences between these results and those obtained with the traditional category score. We found that a value of 0.5 can be used as a standard for the skillful FSS in the forecast of heavy rainfall. The integrated score can maintain all the advantages seen in previous studies in the verification of daily and hourly precipitation and show excellent application prospects. The long-term verification including different seasons also find that the score can effectively improve the identification characteristics of the assessment. | 张博 赵滨 | 2019 | Journal of Tropical Meteorology2019，25，3： | 1 |
| 11 | ANALYSIS OF THE EFFECT OF 3DVAR AND ENSRF DIRECT ASSIMILATION OF RADAR DATA ON THE FORECAST OF A HEAVY RAINFALL EVENT显示文摘The present study designs experiments on the direct assimilation of radial velocity and reflectivity data collected by an S-band Doppler weather radar(CINRAD WSR-98D) at the Hefei Station and the reanalysis data produced by the United States National Centers for Environmental Prediction using the Weather Research and Forecasting(WRF) model,the WRF model with a three-dimensional variational(3DVAR) data assimilation system and the WRF model with an ensemble square root filter(EnSRF) data assimilation system.In addition,the present study analyzes a Meiyu front heavy rainfall process that occurred in the Yangtze-Huaihe River Basin from July 4 to July 5,2003,through numerical simulation.The results show the following.(1) The assimilation of the radar radial velocity data can increase the perturbations in the low-altitude atmosphere over the heavy rainfall region,enhance the convective activities and reduce excessive simulated precipitation.(2) The 3DVAR assimilation method significantly adjusts the horizontal wind field.The assimilation of the reflectivity data improves the microphysical quantities and dynamic fields in the model.In addition,the assimilation of the radial velocity and reflectivity data can better adjust the wind fields and improve the intensity and location of the simulated radar echo bands.(3) The EnSRF assimilation method can assimilate more small-scale wind field information into the model.The assimilation of the reflectivity data alone can relatively accurately forecast the rainfall centers.In addition,the assimilation of the radial velocity and reflectivity data can improve the location of the simulated radar echo bands.(4) The use of the 3DVAR and EnSRF assimilation methods to assimilate the radar radial velocity and reflectivity data can improve the forecast of precipitation,rain-band areal coverage and the center location and intensity of precipitation. | 刘寅 何光鑫 刘佳伟 赵虹 燕成玉 | 2016 | Journal of Tropical Meteorology2016，22，3： | 1 |
| 12 | A Heavy Rainfall Event in Autumn over Beijing--Atmospheric Circulation Background and Hindcast Simulation Using WRF显示文摘Heavy rainfall events often occur in Beijing during summer but rarely in autumn. However,during 3-5 September2015, an exceptionally heavy rainfall event occurred in Beijing. Based on the reanalysis data and the Weather Research and Forecasting(WRF) model simulations, the main contributing factors and the predictability of this heavy rainfall event were examined through comprehensive analyses of vorticity advection and water vapor transport/budget. The results indicate that a 'high-in-the-east-low-in-the-west' pattern of 500-hPa geopotential height over the Beijing area played an important role. The 850-hPa low-level jet(LLJ) provided a mechanism for rising motion and transported abundant water vapor into the Beijing area. Two-way nested hindcast experiments using WRF well reproduced the atmospheric circulation and LLJ. Quantitative analysis indicates that the WRF model with the rapid update cycle(RUC) land surface scheme and the single-moment 6-class(WSM6) microphysics scheme exhibited the best skill, and the model performance improved with a higher resolution. Further analysis indicates that the bias in the precipitation forecast was caused by the bias in water vapor transport. | Xiangrui LI Ke FAN Entao YU | 2018 | Journal of Meteorological Research2018，32，3： | 1 |
| 13 | Variation Diagnosis and Regional Comparison of Different Intensity of Rainfalls and Their Contribution to Total Rainfall in China in the Context of Global Warming显示文摘Using the data of 545 meteorological stations in 1961-2015,according to the rainfall intensity classification standard issued by the China Meteorological Administration,the rainfall events were divided into six intensities: light rain,moderate rain,heavy rain,torrential rain,downpour and heavy downpour. The latter three were recorded as total torrential rain,and all the six were recorded as the total rainfall. In terms of the interannual rainfall and rainy days,the whole China was regarded as an object. Firstly,the annual rainfall and rainy day of different intensity of rainfalls of 545 stations in 1961-2015 were calculated. Then,the variation trend of rainfall and rainy days was calculated. Finally,the variation trend of contribution of different intensity of rainfalls and rainy days to total rainfall and rainy days were diagnosed. It obtained the following results.( i) The light rain in China was declining from 1961 to 2015,and the trend values of light rain and rainy days were-411. 44 mm/yr and-136. 99 d/yr,respectively. Heavy rain and total heavy rainfall showed an increasing trend,with rainfall and rainy day trends of 127. 02 and 463. 94 mm/yr and 7. 93 and 4. 24 d/yr,respectively. The total rainfall showed a ' hockey' phenomenon of ' first rise,then decline',and the trend values of rainfall and rainy days were 204. 29 mm/yr and-95. 81 d/yr,respectively. Except the northern region,the rainfall in most parts of China was dominated by increasing trends and was moving towards extremes.( ii) In terms of rainfall contribution rate,the contribution of light rain to total rainfall showed a declining trend,and the trend values of rainfall and rainy day contribution were both-0. 11%/yr. The contribution of other intensity rainfalls to total rainfall showed an increasing trend. The contribution of torrential rain to the total torrential rain showed a declining trend. The contribution trends of rainfall and rainy days were-0. 06% and-0. 03%/yr,respectively. The contribution of downpour and heavy downpour to total torrential rain showed an increasing trend,indicating the intensity of torrential rain in China is increasing. Although the contribution rate of different intensity of rainfalls to total rainfall was different in different areas of China,the contribution rate of heavy rainfall to total rainfall in most areas showed an increasing trend.( iii) Through comparing the rainfall and rainy days of six different intensity of rainfalls,it can be found that China’s heavy rainfall events are increasing and the rainfall intensity is developing towards extremes. | Feng KONG | 2019 | Asian Agricultural Research2019，11，8： | 1 |
| 14 | A NUMERICAL STUDY ON THE INFLUENCE OF WIND FIELDS AT UPPER LEVELS IN THE MEIYU PERIOD ON THE DEVELOPMENT OF LOW LEVEL JET AND MESOSCALE SYSTEMS显示文摘Using a mesoscale model,a numerical study on a heavy rainfall case occurring in theChangjiang-Huaihe River Basin is made in this paper.The influence of the intensity ofnortheasterly wind in front of the Qinghai-Xizang high at upper level on the low level wind fieldand development of mesoscale systems as well as heavy rainfall is investigated.The model wellreproduced the heavy rainfall process and the weather systems associated.And it indicates that thestrong northeasterly flow around the high at upper troposphere will bring about not only thestrengthening of low level southeasterly wind,but also the appearance of shear-line and mesoscalevortex at low level.The coupling of northerly wind at upper level and southerly wind at lowerlevel constructs a vertical indirect circulation which is most favourable for the development ofconvective motions.Its ascending branch in the shear-line area is very strong and shows apronounced mesoscale characteristic. | 翟国庆 高坤 孙淑清 | 1998 | Acta meteorologica Sinica1998，12，1： | 1 |
| 15 | Spatial Pattern Difference of Contribution between Short and Long-duration Heavy Rainfall to Total Heavy Rainfall in China from 1961 to 2015显示文摘Many regions are pounded with heavy rainfall, causing flood, casualties, property damage and severe destruction to ecosystem in multiple urban areas. Frequent occurrence of extremely heavy precipitation event under the background of global climate change has caused terrible harm on economic and social development, life security, ecosystem, etc.;brought profound impact on sustainable development of disaster area;become a key factor of global and regional disasters and environmental risk;and been widely concerned by academic circle and all sectors of the society. So severe disasters caused by extreme precipitation events have attracted more and more attention, while the relationship between heavy rainfall with different duration and total heavy rainfall has become the hottest scientific frontier issue. Contribution of heavy rainfall with different duration to the total heavy rainfall has significant spatial differences. Here we used daily rainfall data from 1961 to 2015 of 659 meteorological stations in China. When the rainfall is greater than 50 mm in 24 hours, that is a heavy rainfall event. Heavy rainfall only lasting one day is defined as short- duration heavy rainfall, while heavy rainfall lasting more than two days is defined as long-duration heavy rainfall. Results indicated that: on the basis of duration days defined long-duration heavy rainfall, on the spatial distribution, total rainfall, total heavy rainfall and short-duration heavy rainfall showed 'increasing-decreasing-increasing' from the southeast coast to northwest inland in China from 1961 to 2015, and on the whole meteorological station with increasing trend predominant. In the meantime, long-duration heavy rainfall showed 'increasing-decreasing' spatial pattern, and on the whole meteorological station with decreasing trend predominant. We detected that there was a belt of becoming drought from northeast to southwest. The contribution of total heavy rainfall to total rainfall as well as long-duration heavy rainfall to total heavy rainfall showed 'high in southeast-low in northwest' spatial distribution pattern. On the contrary, the contribution of short-duration heavy rainfall to total heavy rainfall showed 'low in southeast-high in northwest' spatial distribution pattern. The contribution trend of total heavy rainfall to total rainfall and short-duration heavy rainfall to total heavy rainfall showed 'increasing-mosaic with increasing and decreasing-increasing' spatial distribution pattern from northeast to southwest, and on the whole meteorological station with increasing trend predominant. On the contrary, the contribution trend of long-duration heavy rainfall to total heavy rainfall showed mosaic with increasing and increasing in the northeast, slightly decreasing in the southwest, and on the whole meteorological station with decreasing trend predominant. There was a climate transition zone from northeast to southwest, which was essentially coincident with the arid zone. The results suggested that the precipitation in China was changing to extremely accompanied by short-duration storm increased significantly. Chinese heavy rainfall especially the increase of short-duration heavy rainfall suggests that human activity is likely to be triggered an increasing in extreme precipitation. | Kong Feng | 2019 | Meteorological and Environmental Research2019，10，4： | 0 |
| 16 | HEAVY PRECIPITATION IN HONG KONG,1951-2000显示文摘Daily precipitation amounts greater than 50 mm from 1951 to 2000 in Hong Kong wereanalyzed to determine their seasonal and annual frequencies.A total of 627 extreme rainfall dayshappened and 334 (53.27%) days occurred in summer.Non significant increasing trends forannual precipitation and number of heavy rain days were detected.Daily surface weather mapswere used to identify the synoptic weather types producing the heavy rainfall.It was discoveredthat tropical cyclone and low pressure induced most of the heavy precipitation.Seven out of twelveyears with counts of heavy rain days over fifteen coincided with E1 Nino events. | 甄欲瑜 | 2003 | Acta meteorologica Sinica2003，17，1： | 0 |
| 17 | Satellite image analysis and study of Taklimakan Desert rain trails显示文摘The Taklimakan Desert nephsystem and rain trails after heavy precipitation have been moni-tored continuously for 3 years by using TIROS-N/NOAA meteorological satellite of the United States.Observational facts and its statistical characteristics of the desert rain trails are mainly revealed.Main weathersystems which form the deset rain trails are expounded.The significance and some other problems of desertrain trails are also discussed. | 徐希慧 | 1995 | Science China Chemistry1995，38，9： | 0 |
| 18 | The Meso-Scale Analysis of “6.18” Severe Rainfall Event in Hunan Province显示文摘[Objective]The aim was to analyze the mesoscale and small scale system that influenced the strong rainfall in Hunan from June 18 to 20 in 2010. [Method] By dint of regular observation material and rainfall in regional automatic station, TBB of FY-2C geostationary meteorological satellite, characteristics and causes of one heavy rainfall event in Hunan Province on 18-20 June 2010 were studied. [Result] The rainstorm happened under the southwest warm and wet torrent at the edge of subtropical high when the ground cold air intruded, which triggered the release of unstable energy. The water vapor from Bay of Bengal and South China Sea sent abundant water vapor to south China. The water vapor strengthened, which synchronized with the rainstorm. The ground mesoscale convergence line and the mesoscale low pressure intensified the rainstorm. Changes of pressure field reflected the changes of rainfall and indicated the location and movement of heavy rainfall. [Conclusion] The study provided theoretical basis to understand the rainstorm formation mechanism and improve disaster prevention capacity. | ZHANG Hai YIN Zhong-hai DENG Zhao-ping ZHOU Jiang-zhong TANG Ming-hui | 2012 | Meteorological and Environmental Research2012，3，11： | 0 |
| 19 | TRAJECTORY DIAGNOSIS OF AIR PARCELS IN HIGH-AND LOW-LEVEL JETS FOR A HEAVY RAINFALL CASE DURING MEIYU SEASON OF 1991显示文摘Trajectory diagnostic methods were used to analyze air parcels of high- and low-level jets during the heavy rainfallof 4-6 July 1991.It is found that air parcels above rainfall area travelled from the entrance of the high-level jet,passingthrough the jet center and reached the exit region.Upper tropospheric divergence over rainfall area resulted fromdecelerative motion of the jet flow.Warm and moist southwest flow converged and ascended ahead of the low-level jet.The decreasing of low-level pressure as a result of high-level divergence that caused the low-level jet becameunexpectedly strong. | 陶祖钰 黄伟 | 1993 | Acta meteorologica Sinica1993，7，4： | 0 |
| 20 | Numerical Simulation on a Heavy Rainfall Event over Jiangxi Province显示文摘[Objective]The aim was to discuss the heavy rainfall formation mechanism and to reveal the causes of rainstorm. [Method] Based on the conventional observational data, a numerical simulation and diagnosis analyses have been carried on heavy rainfall event over Jiangxi province from 16 June to 20 June 2010, with a meso-scale REM model. The results showed that this rare rainstorm was a typical heavy rainfall over Meiyu front. The cold air flow behind the 500 hPa East Asia trough and 700 hPa North China vortex joined up the southwestern flow located in the northwest part of the strong and stable subtropical high, thus the cold air and warm air converged and maintained over the northern part of Hunan and Jiangxi province. Since the area that cold air and warm air joined up was stable and the southwestern warm and wet flow was abnormally strong, the vapor, dynamical, and thermodynamic conditions was leading to the trigger development of meso-scale convection systems. The extraordinary rainstorm was caused by the interaction of many factors such as strong vapor and convergence ascending motion, weak cold air activities in middle-levels, the strengthening of southwestern low-level jet, the formation and maintenance of southwestern vortexes, etc. The simulated precipitation of the high resolution model was very similar with the observational rainfall. The model had a good predictive skill for the location, intensity and center of heavy rainfall. By diagnosing the physical variables, it found that the distribution characteristic of the physical variables had an obvious indication for precipitation forecast. [Conclusion] The study provided reference to improve rainstorm forecast. | ZHOU Zu-gang JIANG Yong-qiang ZHANG Gao-ying ZHANG Wen-jun WANG Cheng-lin | 2012 | Meteorological and Environmental Research2012，3，12： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员