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Thunderstorms without tropopause penetration in Central Africa produce cloud-top jet events 认领 引用
1
作者 Alice Nambalirwa Gaopeng Lu +4 位作者 Tao Xian Feifan Liu Yucheng Zi Mao Zhang Xin Huang 《Atmospheric and Oceanic Science Letters》 CAS CSCD 2026年第3期43-51,共9页
Using multi-satellite observations, the authors examined 20 upward discharge events from thunderstorms (15blue jets (BJs)/blue starters (BSs) and 5 gigantic jets (GJs)) observed by ISUAL (Imager of Sprites and Upper A... Using multi-satellite observations, the authors examined 20 upward discharge events from thunderstorms (15blue jets (BJs)/blue starters (BSs) and 5 gigantic jets (GJs)) observed by ISUAL (Imager of Sprites and Upper Atmospheric Lightning) between 2009 and 2015. The analyses reveal that these BJ/BS and GJ discharges consistently originated from thunderstorms with vigorous convection, strong mixed-phase microphysics, and high CAPE (convective available potential energy) of greater than 1000 J kg-1 in most cases, yet cloud tops remained 13 km below the 1617 km tropical tropopause. Notably, one GJ emerged from a shallow thunderstorm with exceptionally low CAPE (~140 J kg−1) and cloud tops of only ~6 km, exposing previously unrecognized initiation pathways. It is concluded that thunderstorms in Central Africa can produce BJ/BSs and GJs without penetrating the tropopause, challenging the prevailing overshooting-top paradigm that has dominated jet initiation theory.The results demonstrate that tropopause penetration is probably not a prerequisite for jet production and identify Central Africa as a critical natural laboratory for advancing our understanding of troposphere-ionosphere coupling and the dynamics of transient luminous events. 展开更多
关键词 Central Africa Upward jets Convective thunderstorms Tropopause penetration
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Structural Characteristics of Thunderstorms Associated with Negative Triggered Lightning Flashes 认领 引用
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作者 Xiaojie LIU Dong ZHENG +4 位作者 Yijun ZHANG Yang ZHANG Yanfeng FAN Weitao LYU Hai YU 《Advances in Atmospheric Sciences》 SCIE CAS CSCD 2025年第10期2053-2066,共14页
This study utilizes data from a 3D lightning location system,polarimetric radar,and current measurements from channels of triggered lightning flashes(TLFs)to analyze the structural characteristics of the parent thunde... This study utilizes data from a 3D lightning location system,polarimetric radar,and current measurements from channels of triggered lightning flashes(TLFs)to analyze the structural characteristics of the parent thunderstorms associated with negative TLFs in South China.The triggered-flash region(TFR)displays distinct stratiform cloud characteristics,including lower radar reflectivity heights and a predominance of ice crystals and dry snow above the 0℃ layer.In contrast,the thunderstorm convection core region(CCR)tends to have more graupel particles in the mixed-phase layers and exhibits an ice-water content peak approximately 3.4 times that of the TFR.The charge regions involved in discharges in TFRs exhibit a dipolar charge structure,with the-5℃ layer roughly dividing the upper positive and lower negative charge regions.Conversely,the CCRs feature a typical tripolar charge structure.The dominant dipole charge structure in the TFR results in an increase in the negative charge field below the negative charge region with height,providing a necessary condition for successfully triggering negative TLFs.Furthermore,the horizontal extent of TLFs is positively correlated with their duration and charge transfer.Regions where TLF channels with larger charge transfers propagate tend to have greater maximum radar reflectivity but lower average radar reflectivity compared to regions with TLFs with smaller charge transfer. 展开更多
关键词 thunderstorms structure triggered lightning flash charge region lightning location
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Case Studies of Sprite-producing and Non-sprite-producing Summer Thunderstorms 认领 引用 被引量：7
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作者 杨静 杨美荣 +1 位作者 刘超 冯桂力 《Advances in Atmospheric Sciences》 SCIE CAS CSCD 2013年第6期1786-1808,共23页
Three summer thunderstorms in the eastern region of China were analyzed in detail using multiple data, including Doppler radar, lightning location network, TRMM （Tropical Rainfall Measuring Mission）, MT- SAT （Multi... Three summer thunderstorms in the eastern region of China were analyzed in detail using multiple data, including Doppler radar, lightning location network, TRMM （Tropical Rainfall Measuring Mission）, MT- SAT （Multi-Function Transport Satellite） images, NCEP （National Centers for Environmental Prediction） Reanalysis, and radiosonde. Two of the three storms were sprite-producing and the other was non-sprite- producing. The two sprite-producing storms occurred on 1 2 August and 2~28 July 2007, producing 16 and one sprite, respectively. The non-sprite-producing storm occurred on 29-30 July 2007. The major ob- jective of the study was to try to find possible differences between sprite-producing and non-sprite producing storms using the multiple datasets. The results showed that the convection in the 1-2 August storm was the strongest compared with the other storms, and it produced the largest number of sprites. Precipitation ice, cloud ice and cloud water content in the convective regions in the 1-2 August storm were larger than in the other two storms, but the opposite was true in the weak convective regions. The storm microphysical prop- erties along lines through parent CG （cloud-to-ground lightning） locations showed no special characteristics related to sprites. The flash rate evolution in the 1-2 August storm provided additional confirmation that major sprite activity coincides with a rapid decrease in the negative CG flash rate. However, the evolution curve of the CG flash rate was erratic in the sprite-producing storm on 27-28 July, which was significantly different from that in the 1 2 August storm. The average positive CG peak current in sprite-producing storms was larger than that in the non-sprite-producing one. 展开更多
关键词 sprite Doppler radar TRMM lightning thunderstorm
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Statistical Analysis of Thunderstorms on the Eastern Tibetan Plateau Based on Modified Thunderstorm Indices 认领 引用 被引量：3
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作者 YOU Wei ZANG Zengliang +2 位作者 PAN Xiaobin ZHANG Lifeng LI Yi 《Advances in Atmospheric Sciences》 SCIE CAS CSCD 2015年第4期515-527,共13页
The Tibetan Plateau, with an average altitude above 4000 m, is the highest and largest plateau in the world. The frequency of thunderstorms in this region is extremely high. Many indices are used in operational foreca... The Tibetan Plateau, with an average altitude above 4000 m, is the highest and largest plateau in the world. The frequency of thunderstorms in this region is extremely high. Many indices are used in operational forecasting to assess the stability of the atmosphere and predict the probability of severe thunderstorm development. One of the disadvantages of many of these indices is that they are mainly based on observations from plains. However, considering the Plateau＇s high elevation, most convective parameters cannot be applied directly, or their application is ineffective. The pre-convective environment on thunderstorm days in this region is investigated based on sounding data obtained throughout a five-year period（2006–10）.Thunderstorms occur over the Tibetan Plateau under conditions that differ strikingly from those in plains. On this basis,stability indices, such as the Showalter index（including SI and SICCL）, and the K index are improved to better assess the thunderstorm environments on the Plateau. Verification parameters, such as the true-skill statistic（TSS） and Heidke skill score（HSS）, are adopted to evaluate the optimal thresholds and relative forecast skill for each modified index. Lastly, the modified indices are verified with a two-year independent dataset（2011–12）, showing satisfactory results for the modified indices. For determining whether or not a thunderstorm day is likely to occur, we recommend the modified SICCLindex. 展开更多
关键词 thunderstorm Tibetan Plateau modified parameters skill score
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Three-Dimensional Numerical Simulations of the Effects of a Cold Water Surface on the Evolution and Propagation of Thunderstorms 认领 引用 被引量：1
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作者 孔凡铀 黄美元 徐华英 《Advances in Atmospheric Sciences》 SCIE CAS 1993年第3期261-272,共12页
The influences of large areas of semi-unbounded cold water surface on the evolution, propagation and precipitation production of thunderstorms are simulated by using a fully elastic three-dimensional numerical hailsto... The influences of large areas of semi-unbounded cold water surface on the evolution, propagation and precipitation production of thunderstorms are simulated by using a fully elastic three-dimensional numerical hailstorm model. Real sounding profiles for temperature, humidity and wind are employed. The model has successfully simulated the significant modification of the propagation path of thunderstorms near the cold water area. The path change can be either' along-bank' or' toward-bank', depending on the position of the storm system relative to convergence zone of the water-land circulation. The simulations also show that thunderstorms developing or propagating within the convergence zone of local circulation will be intensified and produce much heavier hail, whereas those over cold water surface or the air that has been cooled by the water will be strongly inhibited.The influence of the cold water surface on thunderstorm characters is largely dependent upon the direction and intensity of the low-level wind. 展开更多
关键词 Thunderstorm Numerical simulation Water-land circulation Thunderstorm propagation
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Characteristics of thunderstorms and lightning flashes in the Chinese inland plateau 认领 引用 被引量：1
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作者 TingLong Zhang Tong Zhang +2 位作者 Yang Zhao XiangZhen Kong YanHui Wang 《Research in Cold and Arid Regions》 2010年第3期271-277,共7页
The electrical characteristics of thunderstorms in three different altitude regions of the Chinese inland plateau have been analyzed in this paper.The results show,according to the polarity of the surface electric(E)f... The electrical characteristics of thunderstorms in three different altitude regions of the Chinese inland plateau have been analyzed in this paper.The results show,according to the polarity of the surface electric(E)field,that the thunderstorms can be divided into two categories in the study regions:one showing the normal tripole electrical charge structure(normal-type),and the other showing the special tripole charge structure with a larger-than-usual lower positive charge center(LPCC)at the base of thunderstorm(special-type),where the induced surface E field is controlled by the LPCC when a thunderstorm is overhead.We find that the two types of thunderstorms have different occurrences in different regions,and the percentage of special-type thunderstorms increases with the altitude.On the whole,the flash rate of thunderstorms is quite low,and the mean value is about 1-3 fl/min,while the flash rate of special-type is slightly greater than that of the normal-type thunderstorm.The statistical results of cloud-to-ground flash(CG)numbers indicate that the ratio of+CG flash increases with the altitude,with the value about 14.7 percent through 25.4 percent. 展开更多
关键词 thunderstorm flash rate cloud-to-ground flash
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ANALYSIS OF THE TRENDS OF THUNDERSTORMS IN 1951-2007 IN JIANGSU PROVINCE 认领 引用 被引量：1
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作者 魏建苏 刘梅 +1 位作者 张备 俞剑蔚 《Journal of Tropical Meteorology》 SCIE 2011年第1期58-63,共6页
Based on the 1951-2007 thunderstorms in Jiangsu,a study is conducted for their climate trends,periodicity,spatiotemporal patterns,and the distributions of the first and last days of the thunderstorms at different guar... Based on the 1951-2007 thunderstorms in Jiangsu,a study is conducted for their climate trends,periodicity,spatiotemporal patterns,and the distributions of the first and last days of the thunderstorms at different guarantee rates (GRs) using climate tendency rate,wavelet analysis,and GR for diagnosis.Results suggest that the inter-annual number of thunderstorm days (TSDs) exhibits a decreasing trend in this province.The trend is displayed mainly in the decreasing TSD number in summer and autumn except in spring,when the variation is not significant in the study period.In this province,the TSD number declines by ～2 days per 10 years.On an inter-annual basis,the pronounced positive departures of the number take place chiefly in the early 1960s,the late 1960s to the early-mid-1970s,the late 1980s,and the late 1990s compared with the negative anomalies dominant in the late 1970s to the mid-1980s,the mid-to-late-1990s,and the late 1990s to 2007.There are vast differences in the initial and ending days at diverse GRs in different areas of the province.At 50% GR,the earliest (last) days occur from mid-March to early April (early to late September) while at 80% GR,the initial (last) days are from late March to early May (early to late October).For the distribution of periods,the periods >8-10 years are relatively stable for the entire province.Based on 1951-2007 period analysis,the region north (south) of the Huaihe River experiences TSDs less (more) than normal days in recent years. 展开更多
关键词 thunderstorm climate tendency,wavelet analysis,guarantee rate,initial and ending days
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A Probe for Consistency in CAPE and CINE During the Prevalence of Severe Thunderstorms:Statistical – Fuzzy Coupled Approach 认领 引用 被引量：1
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作者 Sutapa Chaudhuri 《Atmospheric and Climate Sciences》 2011年第4期197-205,共9页
Thunderstorms of pre-monsoon season (April – May) over Kolkata (22° 32’N, 88° 20’E), India are invariably accompanied with lightning flashes, high wind gusts, torrential rainfall, occasional hail and torn... Thunderstorms of pre-monsoon season (April – May) over Kolkata (22° 32’N, 88° 20’E), India are invariably accompanied with lightning flashes, high wind gusts, torrential rainfall, occasional hail and tornadoes which significantly affect the life and property on the ground and aviation aloft. The societal and economic impact due to such storms made accurate prediction of the weather phenomenon a serious concern for the meteorologists of India. The initiation of such storms requires sufficient moisture in lower troposphere, high surface temperature, conditional instability and a source of lift to initiate the convection. Convective available potential energy (CAPE) is a measure of the energy realized when conditional instability is released. It plays an important role in meso-scale convective systems. Convective inhibition energy (CINE) on the other hand acts as a possible barrier to the release of convection even in the presence of high value of CAPE. The main idea of the present study is to see whether a consistent quantitative range of CAPE and CINE can be identified for the prevalence of such thunderstorms that may aid in operational forecast. A statistical – fuzzy coupled method is implemented for the purpose. The result reveals that a definite range of CINE within 0 – 150 Jkg-1 is reasonably pertinent whereas no such range of CAPE depicts any consistency for the occurrence of severe thunderstorms over Kolkata. The measure of CINE mainly depends upon the altitude of the level of free convection (LFC), surface temperature (T) and surface mixing ratio (q). The box-and-whisker plot of LFC, T and q are drawn to select the most dependable parameter for the consistency of CINE in the prevalence of such thunderstorms. The skills of the parameters are evaluated through skill score analyses. The percentage error during validation with the observation of 2010 is estimated to be 0% for the range of CINE and 3.9% for CAPE. 展开更多
关键词 Severe Thunderstorms Forecast CAPE CINE Statistics Fuzzy Logic
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Temporal and Spatial Distribution and Influence Systems of Spring Thunderstorms in 2013 in Sichuan Province 认领 引用
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作者 徐娓 《Agricultural Science & Technology》 CAS 2014年第12期2192-2196,2203,共5页
Based on the lightning monitoring data, automatic and routine weather station observation data in spring （March-May） of 2013 of Sichuan Province, the corresponding relationship between the spatial distribution and t... Based on the lightning monitoring data, automatic and routine weather station observation data in spring （March-May） of 2013 of Sichuan Province, the corresponding relationship between the spatial distribution and the different regions, and the characteristics of atmospheric circulation and evolution of influence the sys- tem were analyzed and summarized. The results show that： the lightning and thunderstorm showed great regional differences in the spring of 2013 in Sichuan Province and the thunderstorm activity period was not the same in different areas. Because of the change of atmospheric circulation, the influence system from March to May corresponding to the thunderstorms in Sichuan tended to be volatile, also. 展开更多
关键词 Spring Thunderstorm Regional differences The circulation situation In- fluence system
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Radio-Acoustic Study of Thunderstorms 认领 引用
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作者 Giancarlo T. Tomezzoli 《Journal of Sensor Technology》 2023年第3期51-58,共8页
The observation, in the past, that a thunderstorm perturbed the transmissions of an old vacuum tubes radio with noise discharges in correspondence with lightnings, suggested the possibility of radio-acoustic study of ... The observation, in the past, that a thunderstorm perturbed the transmissions of an old vacuum tubes radio with noise discharges in correspondence with lightnings, suggested the possibility of radio-acoustic study of thunderstorms. The noise discharges appeared to convey not only information about lightnings, but also about any other thunderstorm electromagnetic phenomena generating noise discharges. The low-cost instrumentation involved in the radio-acoustic study, comprised a radio Telefunken mod. T33B, a 15 m long indoor wire antenna, a mobile telephone Samsung Galaxy S20 FE 5G provided with the recorder App Enregistreur vocal, a computer HP Pavillion dv5-1254eg and the s/w audio analyser Audacity. A first thunderstorm on 20 June 2023 and a second thunderstorm on 22 June 2023, both above Munich, were radio-acoustic studied. The second thunderstorm was more active than the first and released much more energy. 展开更多
关键词 Thunderstorms Radio-Acoustics Vacuum Tube Radio Noise Discharges
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Temporal and Spatial Analysis of Thunderstorms in 46 Years in Henan Province 认领 引用 被引量：3
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作者 韦丹 肖稳安 陈红兵 《Meteorological and Environmental Research》 2010年第9期42-45,共4页
By dint of natural orthogonal function(EOF) decomposition,correlation and trend analysis methods,the temporal and spatial variation characteristics of thunderstorms in recent 46 years in Henan Province were analyzed.T... By dint of natural orthogonal function(EOF) decomposition,correlation and trend analysis methods,the temporal and spatial variation characteristics of thunderstorms in recent 46 years in Henan Province were analyzed.The result showed that the thunderstorms in Henan Province decreased gradually from the northwest region to the southeast region and the frequency of thunderstorms in the southeast area was relatively high.The thunderstorm intensity area was in its horizontal distribution.Thunderstorms acted relative actively in 60s and tended to dwindle in the end of 80s.While in recent years,the thunderstorms tended to increase and started act frequently.Since March to August in every year,thunderstorms multiplied in each region and decreased after September.The period between 16:00 to 20:00 was the high peak hours of thunderstorms every year.Thunderstorms distribution in Henan Province had pretty good consistence,increasing and decreasing at the same time.The annual variation of thunderstorms showed an unobvious decreasing tendency. 展开更多
关键词 Thunderstorm Temporal-spatial variation Henan Province China
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Study on the Distribution Characteristics of Thunderstorms in Xuzhou City 认领 引用
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作者 Zhaokun Wang Guangdong Sun +2 位作者 Wuguang Yan Dongliang Wei Daoqun Zhang 《Meteorological and Environmental Research》 2013年第11期32-34,43,共3页
[Objective] The study aimed to discuss the distribution characteristics of thunderstorms in Xuzhou City. [Method] Based on thunder- storm observation data during 1978 -2008 provided by Jiuli Mountain station, beginnin... [Objective] The study aimed to discuss the distribution characteristics of thunderstorms in Xuzhou City. [Method] Based on thunder- storm observation data during 1978 -2008 provided by Jiuli Mountain station, beginning and ending months, days, duration, frequency, hours and direction of thunderstorms in Xuzhou were analyzed. [ Result] From 1978 to 2008, there were obvious annual variations in thunderstorm days in Xuzhou City. Thunderstorm days were more in July and August compared with other months, while there were no thunderstorms in January and De- comber. Thunderstorms began earliest in February and ended latest in November, with a long span. The longest duration of thunderstorms reached 259 d, accounting for 71% of total days of a year. The maximum frequency of thunderstorms （64） appeared in 1995, and the maximum hours of thunderstorms （4 048 h） appeared in 2003. Thunderstorms occurred most frequently in the southwest, followed by SE and NW. [ Conclusion] The research could provide scientific references for the prevention and control of lightning strokes in Xuzhou in future. 展开更多
关键词 Thunderstorm Distribution characteristic Xuzhou China
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Analysis on Climatic Characteristics of Thunderstorms in Doumen District of Zhuhai City during Recent 46 Years 认领 引用
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作者 Shao Yingquan Li Xiaohong 《Meteorological and Environmental Research》 2014年第1期9-11,共3页
Based on daily data of thunderstorms during 1967 -2012 from the national meteorological station in Doumen District of Zhuhai City, the climatic characteristics of thunderstorms in Doumen District were analyzed using c... Based on daily data of thunderstorms during 1967 -2012 from the national meteorological station in Doumen District of Zhuhai City, the climatic characteristics of thunderstorms in Doumen District were analyzed using climate tendency rate, sliding t test, trend analysis and experience frequency, The results showed that annual thunderstorm days in Doumen District showed a decreasing trend in recent 46 years; thunderstorms appeared in the whole year; monthly thunderstorm days had two peaks; thunderstorms occurred frequently in summer, especially in August, while thunderstorm days were the least in winter; annual thunderstorm days in Doumen District declined sharply in 1984; most thunderstorms began from middle February to late March and ended from late September to middle November; thunderstorms in Doumen District lasted for a long term, and there was a great change in thunderstorm duration in different years. 展开更多
关键词 Thunderstorm days Climatic characteristics Doumen China
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Detection,Mechanism,and Forecasting of Lightning and Thunderstorms 认领 引用 被引量：1
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作者 Xiushu QIE Dongxia LIU +3 位作者 Rubin JIANG Dong ZHENG Shaoxuan DI Zhixiong CHEN 《Journal of Meteorological Research》 SCIE CSCD 2025年第3期741-761,共21页
Thunderstorms are severe convective weather systems generating lightning,which can lead to various catastrophic weather when a large amount of lightning is produced.In the past decade,high spatiotemporal resolution li... Thunderstorms are severe convective weather systems generating lightning,which can lead to various catastrophic weather when a large amount of lightning is produced.In the past decade,high spatiotemporal resolution lightning detection technology has been developed,which has laid a solid foundation for investigating the propagation and development mechanism of lightning as well as associated physical effects.Based on the Doppler dual polarization weather radar and high-resolution numerical models,thunderstorm dynamics,microphysics,electrical processes,and their interactions have been well investigated,and some new insights into the thunderstorm charge distribution and its relation to the thunderstorm structure have been obtained.All these have promoted the lightning forecasting and lightning data assimilation.This paper reviews the recent research progress in detection,mechanism,and forecasting of thunderstorms and lightning in China in the last decade from four aspects:1)high-resolution three-dimensional(3D)lightning mapping technology and application,2)lightning in different thunderstorms and its relationship with cloud dynamics and microphysics,3)observation and simulation of lightning charge structure in thunderstorms,and 4)lightning prediction and lightning data assimilation for thunderstorm forecasting.Major challenges and the cuttingedge research directions in lightning and thunderstorms studies are also highlighted. 展开更多
关键词 high-precision lightning mapping technology lightning physics and mechanism thunderstorm charge structure lightning forecasting lightning data assimilation for thunderstorm forecasting
Infrared brightness temperature-based indicators for identifying thunderstorm clouds:Insights from FY-4A satellite observations 认领 引用
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作者 Chaoying Wang Rubin Jiang +4 位作者 Jiangjiang Xia Yunfei Wu Hongrong Shi Fengquan Li Xiang'ao Xia 《Atmospheric and Oceanic Science Letters》 CAS CSCD 2026年第3期15-20,共6页
Accurate monitoring and timely identification of early indicators of thunderstorms are of paramount importance in preventing and mitigating the potential disasters associated with such meteorological events.This study... Accurate monitoring and timely identification of early indicators of thunderstorms are of paramount importance in preventing and mitigating the potential disasters associated with such meteorological events.This study utilizes the TOBAC(Tracking and Object-Based Analysis of Clouds)automated tracking algorithm,integrated with FY-4A geostationary satellite infrared data,to investigate the spatiotemporal characteristics and evolutionary patterns of cloud-top brightness temperature(BT),areal extent,and phase transitions of thunderstorm and non-thunderstorm clouds across the North China region.The analysis reveals that thunderstorm clouds demonstrate significantly enhanced convective intensity compared to non-thunderstorm clouds,with the following distinctive features:(1)a substantially faster drop rate in 10.8µm BT,reaching values nearly 2.3 times greater;(2)positive BT differences between the 10.8 and 8.5µm channels,exceeding 0 K;and(3)a dramatically increased areal expansion rate,approximately 4.5-fold higher than that observed in non-thunderstorm clouds.These findings provide significant scientific insights and practical implications for advancing thunderstorm identification techniques and optimizing early warning systems,which are critical to improving disaster prevention and mitigation capacity across the North China region. 展开更多
关键词 Thunderstorm TOBAC FY-4A Lightning North China
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Interannual variability of thunderstorm days over the Tibetan Plateau:Synergistic effects of the Indian Ocean basin-wide mode modulation and CAPE forcing 认领 引用
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作者 Kexin Zhu Rubin Jiang +2 位作者 Zhuling Sun Shanfeng Yuan Jing Yang 《Atmospheric and Oceanic Science Letters》 CAS CSCD 2026年第3期21-27,共7页
This study investigates the interannual and decadal variability of dominant summer thunderstorm day anomaly modes over the Tibetan Plateau(TP)using observational data from 39 stations during 1979-2013,focusing on thei... This study investigates the interannual and decadal variability of dominant summer thunderstorm day anomaly modes over the Tibetan Plateau(TP)using observational data from 39 stations during 1979-2013,focusing on their linkages to TP thermodynamics and oceanatmosphere interactions.Empirical orthogonal function and wavelet analyses reveal two primary spatiotemporal modes:The first mode exhibits a northeastsouthwest meridionally inclining dipole pattern with widespread positive anomalies over the northeastern TP,showing significant interannual variability of 35 years and 8 years.The second mode presents a southwest-northeast zonally inclining dipole pattern with prominent positive anomalies over the southwestern TP,displaying 3-year and 5-year interannual oscillations.The TP exhibits significant interannual variability in thunderstorm days,with an evident amplification after 200o.Convective available potential energy(CAPE),as a key indicator of the lightning and severe thunderstorm environment,dominates the interannual variability of TP thunderstorm days.The Indian Ocean Basin-Wide mode(IOBW)modulates thunderstorm days by influencing the large-scale divergence-convergence dynamics and moisture environment.Specifically,the IOBW strengthens the Bay of Bengal anticyclone,enhancing moisture transport to the southeastern TP,and amplifies uppertropospheric divergence.Combined with enhanced CAPE,these processes collectively lead to an increase in thunderstorm days.Multiple-variable regression analyses indicate that IOBW and CAPE collectively explain 52.1%of the interannual thunderstorm day variability.These findings advance the understanding of the mechanisms underlying TP interannual thunderstorm activity and provide crucial insights for improving regional climate projections. 展开更多
关键词 Tibetan Plateau Thunderstorm day Large interannual variability Indian ocean basin-wide mode CAPE
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Urban effects and summer thunderstorms in a tropical cyclone affected situation over Guangzhou city 认领 引用 被引量：9
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作者 MENG WeiGuang YAN JingHua HU HaiBo 《Science China Earth Sciences》 CAS 2007年第12期1867-1876,共10页
With data mainly from Guangzhou mesonet Automatic Weather Stations(AWS),Guangzhou Doppler Radar and satellite TBB data,characteristics and evolution of the urban heat island(UHI)over Guang-zhou City were analyzed in a... With data mainly from Guangzhou mesonet Automatic Weather Stations(AWS),Guangzhou Doppler Radar and satellite TBB data,characteristics and evolution of the urban heat island(UHI)over Guang-zhou City were analyzed in a tropical cyclone affected situation for early August 2005.In particular,two thunderstorms occurring during this period respectively at the night of 4 August and in the afternoon of 7 August were investigated to study the relationships between the development of thunderstorms and the UHI.Results showed that two thunderstorms were associated with the UHI effects.UHI induced local air convergence and initiated the thunderstorm convections.Both cases showed a general agreement in time and space for the locations of maximum UHI,convergence,convection,and pre-cipitation.Convection was found to be more favorable to developing in time periods and locations with stronger intensity of UHI.Analysis also showed that,due to the urban effects,both thunderstorms got strengthened when moving over Guangzhou City,with maximum radar echoes observed right over the urban area and precipitation located within the city.All these features reveal that two thunderstorms were urban-induced storms. 展开更多
关键词 summer thunderstorms urban heat islands(UHI) urban effects tropical cyclone
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On the possible meteorological factors contributing to lightning-ignited wildfires in West Sichuan:A case study of MuLi wildfire in March 2019 认领 引用
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作者 Zhengyang Qu Gaopeng Lu +3 位作者 Yong Xue Hailiang Huang Feifan Liu Jinchang Deng 《Atmospheric and Oceanic Science Letters》 CAS CSCD 2026年第3期36-42,共7页
Lightning-ignited wildfires (LIWs) are a significant type of natural disaster in forest ecosystems. However, due to their high randomness and complexity, they remain difficult to detect and precisely locate in time. T... Lightning-ignited wildfires (LIWs) are a significant type of natural disaster in forest ecosystems. However, due to their high randomness and complexity, they remain difficult to detect and precisely locate in time. This study analyzes a typical LIW case to examine lightning characteristics and the associated meteorological conditions during thunderstorm development. In this case, the wildfire occurred during the early stage of thundercloud development, when lightning frequency and intensity were relatively low. Nevertheless, local conditions-low humidity, strong winds, and lack of precipitation-were favorable for ignition. Notably, the parent lightning was pre dominantly negative, whose discharge properties may increase the risk of ignition. A comparative analysis of another LIW case in the same region also showed a predominance of negative lightning. These findings suggest that, under the specific environmental conditions of this region, negative lightning may have a higher potential to ignite wildfires. Based on individual case studies, this research provides preliminary insights into the mechanisms of LIWs. 展开更多
关键词 Lightning Thunderstorm Meteorological parameters Forest fire West Sichuan
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Understanding the dynamical-microphysical-electrical processes associated with severe thunderstorms over the Beijing metropolitan region 认领 引用 被引量：13
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作者 Xiushu QIE Shanfeng YUAN +24 位作者 Zhixiong CHEN Dongfeng WANG Dongxia LIU Mengyu SUN Zhuling SUN Abhay SRIVASTAVA Hongbo ZHANG Jingyu LU Hui XIAO Yongheng BI Liang FENG Ye TIAN Yan XU Rubin JIANG Mingyuan LIU Xian XIAO Shu DUAN Debin SU Chengyun SUN Wenjing XU Yijun ZHANG Gaopeng LU Da-Lin ZHANG Yan YIN Ye YU 《Science China Earth Sciences》 SCIE EI CAS CSCD 2021年第1期10-26,共17页
The Dynamical-microphysical-electrical Processes in Severe Thunderstorms and Lightning Hazards(STORM973)project conducted coordinated comprehensive field observations of thunderstorms in the Beijing metropolitan regio... The Dynamical-microphysical-electrical Processes in Severe Thunderstorms and Lightning Hazards(STORM973)project conducted coordinated comprehensive field observations of thunderstorms in the Beijing metropolitan region(BMR)during the warm season from 2014 to 2018.The aim of the project was to understand how dynamical,microphysical and electrical processes interact in severe thunderstorms in the BMR,and how to assimilate lightning data in numerical weather prediction models to improve severe thunderstorm forecasts.The platforms used in the field campaign included the Beijing Lightning Network(BLNET,consisting of 16 stations),2 X-band dual linear polarimetric Doppler radars,and 4 laser raindrop spectrometers.The collaboration also made use of the China Meteorological Administration’s mesoscale meteorological observation network in the Beijing-Tianjin-Hebei region.Although diverse thunderstorm types were documented,it was found that squall lines and multicell storms were the two major categories of severe thunderstorms with frequent lightning activity and extreme rainfall or unexpected local short-duration heavy rainfall resulting in inundations in the central urban area,influenced by the terrain and environmental conditions.The flash density maximums were found in eastern Changping District,central and eastern Shunyi District,and the central urban area of Beijing,suggesting that the urban heat island effect has a crucial role in the intensification of thunderstorms over Beijing.In addition,the flash rate associated with super thunderstorms can reach hundreds of flashes per minute in the central city regions.The super(5%of the total),strong(35%),and weak(60%)thunderstorms contributed about 37%,56%,and 7%to the total flashes in the BMR,respectively.Owing to the close connection between lightning activity and the thermodynamic and microphysical characteristics of the thunderstorms,the lightning flash rate can be used as an indicator of severe weather events,such as hail and short-duration heavy rainfall.Lightning data can also be assimilated into numerical weather prediction models to help improve the forecasting of severe convection and precipitation at the cloud-resolved scale,through adjusting or correcting the thermodynamic and microphysical parameters of the model. 展开更多
关键词 Lightning 3D location Dual linear polarimetric Doppler radar Severe thunderstorm Lightning data assimilation Hail Short-term heavy precipitation
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Artificially triggered lightning and its characteristic discharge parameters in two severe thunderstorms 认领 引用 被引量：18
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作者 QIE XiuShu ZHANG QiLin +6 位作者 ZHOU YunJun FENG GuiLi ZHANG TingLong YANG Jing KONG XiangZhen XIAO QingFu WU ShuJun 《Science China Earth Sciences》 CAS 2007年第8期1241-1250,共10页
The lightning-induced-damages in the mid-latitude regions are usually caused during severe thunderstorms. But the discharge parameters of natural lightning are difficult to be measured. Five lightning flashes have bee... The lightning-induced-damages in the mid-latitude regions are usually caused during severe thunderstorms. But the discharge parameters of natural lightning are difficult to be measured. Five lightning flashes have been artificially triggered with the rocket-wire technique during the passage of two severe thunderstorms. The discharge current and close electric field of return stroke in artificially triggered lightning have been obtained in microsecond time resolution by using current measuring systems and electric field change sensors. The results show that the five triggered lightning flashes include 1 to 10 return strokes, and the average return stroke current is 11.9 kA with a maximum of 21.0 kA and a minimum of 6.6 kA, similar to the subsequent return strokes in natural lightning. The half peak width of the current waveform is 39 us, which is much larger than the usual result. The peak current of stroke I_p(kA) and the neutralized charge Q(C) has a relationship of I_p = 18.5Q0.65. The radiation field of return stroke is 5.9 kV ? m-1 and 0.39 kV ? m-1 at 60 m and 550 m, respectively. The radiation field decreases as r-1.119 with increase of horizontal distance r from the discharge channel. Based on the well-accepted transmission line model, the speed of return stroke is estimated to be about 1.4 × 10~8m·s-1, with a variation range of (1.1-1.6)×10~8m·s-1. Because of the similarities of the triggered lightning and natural lightning, the results in this article can be used in the protection design of natural lightning. 展开更多
关键词 artificially triggered lightning characteristic discharge parameters current waveform electric field change in close distance severe thunderstorm
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