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| 1 | Impacts of Diurnal Variation of Mountain-plain Solenoid Circulations on Precipitation and Vortices East of the Tibetan Plateau during the Mei-yu Season显示文摘Diurnal variations of two mountain-plain solenoid(MPS) circulations associated with 'first-step' terrain [Tibetan Plateau(TP)] and 'second-step' terrain(high mountains between the TP and 'east plains') in China and their influence on the southwest vortex(SWV) and the mei-yu front vortex(MYFV) were investigated via a semi-idealized mesoscale numerical model [Weather Research and Forecasting(WRF)] simulation integrated with ten-day average fields(mei-yu period of 1–10 July 2007). The simulations successfully reproduced two MPS circulations related to first- and second-step terrain, diurnal variations from the eastern edge of the TP to the Yangtze River–Huaihe River valleys(YHRV), and two precipitation maximum centers related to the SWV, MYFV. Analyses of the averaged final seven-day simulation showed the different diurnal peaks of precipitation at different regions: from the afternoon to early evening at the eastern edge of the TP; in the early evening to the next early morning in the Sichuan Basin(SCB); and in the late evening to the next early morning over the mei-yu front(MYF). Analyses of individual two-day cases confirmed that the upward branches of the nighttime MPS circulations enhanced the precipitation over the SWV and the MYFV and revealed that the eastward extension of the SWV and its convection were conducive to triggering the MYFVs. The eastward propagation of a rainfall streak from the eastern edge of the TP to the eastern coastal region was primarily due to a series of convective activities of several systems from west to east, including the MPS between the TP and SCB, the SWV, the MPS between second-step terrain and the east plains, and the MYFV. | ZHANG Yuanchun SUN Jianhua FU Shenming | 2014 | Advances in Atmospheric Sciences2014，31，1： | 20 |
| 2 | Pm21 from Haynaldia villosa Encodes a CC-NBS- LRR Protein Conferring Powdery Mildew Resistance in Wheat显示文摘 | Liping Xing Ping Hu Jiaqian Liu Kamil Witek Shuang Zhou Jiefei Xu Weihao Zhou Li Gao Zhenpu Huang Ruiqi Zhang Xiue Wang Peidu Chen Haiyan Wang Jonathan D.G. Jones Miroslava Karafiatova Jan Vrana Jan Baros Jaroslav Dolezel Yuanchun Tian Yufeng Wu Aizhong Cao | 2018 | Molecular Plant2018，11，6： | 16 |
| 3 | 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 |
| 4 | 主要人参皂甙的分布和比例及人参产品的质量控制显示文摘采用反相高效液相色谱法,对150多种西洋参、人参及三七的根、叶及其产品进行了分析。以8种主要的人参皂甙Rg,Re,Rf,Rb1,Rc,Rb2,Rg2和Rd作为对照品,来评价人参及其产品的质量,这8种人参皂甙的分布及其比例在对人参及其商品的定性、定量分析方面具有显著的意义。本文首次提出了单体皂甙的含量比率这一有价值的数据在人参品种及不同用药部位鉴定方面的有效性。 | Ma Yuanchun Luo Mai Lynn Malley Monique Doucet(Celex Laboratories Inc., Atholville Industrial Park, 77 Comeau St.,P. O. Box 428,Atholville,New Brunswick CANADA EOK 1A0) | 1996 | 中国药物化学杂志1996，6，1： | 12 |
| 5 | 颈动脉破损斑块的高分辨MR成像研究显示文摘目的评价破损颈动脉粥样硬化斑块的成分及其分布的特点。方法回顾性分析43例经超声诊断颈动脉狭窄50%~99%患者斑块高分辨MR图像,根据斑块表面纤维帽的完整性判定斑块破损情况,同时定量测量管腔、管壁、斑块成分的面积比例、纵向长度,并计算总管腔面积、血管负荷指数、偏心指数。采用SPSS12.0统计学软件对患者一般临床资料进行卡方检验,并且对定量测量所得到的计量资料采用Mann-Whitney秩和检验。结果MRI共发现17例破损斑块(破损斑块组)。破损斑块组和未破损斑块组在血管纵向分布上大面积脂质核心长度差异有统计学意义,中位脂质核心长度分别为6mm、0mm(U=126.5,P〈0.05)。血管负荷指数中位数分别为0.67、0.59,斑块内出血的发生率分别为82.4%和42.3%,差异均有统计学意义(U值分别为105、132,P值均〈0.05)。破损斑块组偏心分布更明显,狭窄范围更长。偏心指数分别为3.68、2.79,平均管腔面积为23.97、30.18mm^2,差异均有统计学意义(U值分别为126、138,P值均〈0.05)。结论破损斑块在血管横断面及纵向分布上具有明显的特点,高分辨MR多方向成像可提供更多易损斑块的信息。 | 于薇 张兆琪 Hunter Underhill ThomasS.Hatsukami YuanChun | 2008 | 中华放射学杂志2008，42，8： | 11 |
| 6 | Science and Prediction of Heavy Rainfall over China:Research Progress since the Reform and Opening-Up of New China显示文摘This paper reviews the major progress on development of the science and prediction of heavy rainfall over China since the beginning of the reform and opening-up of new China(roughly between 1980 and 2019).The progress of research on the physical mechanisms of heavy rainfall over China is summarized from three perspectives:1)the relevant synoptic weather systems,2)heavy rainfall in major sub-regions of China,and 3)heavy rainfall induced by typhoons.The development and application of forecasting techniques for heavy rainfall are summarized in terms of numerical weather prediction techniques and objective forecasting methods.Greatly aided by the rapid progress in meteorological observing technology and substantial improvement in electronic computing,studies of heavy rainfall in China have advanced to investigating the evolution of heavy-rain-producing storms and observational analysis of the cloud microphysical features.A deeper and more systematic understanding of the synoptic systems of importance to the production of heavy rainfall has also been developed.Operational forecast of heavy rainfall in China has changed from subjective weather event forecasts to a combination of both subjective and objective quantitative precipitation forecasts,and is now advancing toward probabilistic quantitative precipitation forecasts with the provision of forecast uncertainty information. | Yali LUO Jisong SUN Ying LI Rudi XIA Yu DU Shuai YANG Yuanchun ZHANG Jing CHEN Kan DAI Xueshun SHEN Haoming CHEN Feifan ZHOU Yimin LIU Shenming FU Mengwen WU Tiangui XIAO Yangruixue CHEN Huiqi LI Mingxin LI | 2020 | Journal of Meteorological Research2020，34，3： | 10 |
| 7 | Incidence of Extended-Spectrum β-Lactamases and Characterization of Integrons in Extended-Spectrum β-Lactamase-producing Klebsiella pneumoniae Isolated in Shantou, China显示文摘这研究涉及生产 Klebsiella pneumoniae 的抗菌素抵抗 ofextended 光谱 beta-lactamase (ESBL ) 的水平,在 Shantou,中国,和它的机制孤立。74 非重复临床 K 孤立。生产在 2 年的一个时期上孤立的 ESBLswere 的 pneumoniae。抗菌素危险性,由 Epsilometer 测试执行了,证明大多数 isolates 是多抵抗的。聚合酶链反应证明在 beta-lactamases 的几种类型之中, SHV 是最流行的, TEM 是第二个大多数流行,并且 CTX-M 是最不流行的。69 孤立为 integrase 基因 IntI1 是积极的,但是没有 IntI2 或 IntI3 基因被发现。班 1 integrons 的可变区域被定序放大并且进一步识别了。13 个不同基因盒子和 11 不同盒子联合被检测。Dfr 和 aadA 盒子是占优势的,盒子 combinationsdfrA12, orfF 和 aadA2 最经常被发现。编码 ESBL 的基因盒子都不是 found.Integrons 是流行的并且起了一个重要作用在多在生产 ESBL K.pneumoniae 的药抵抗。 | Fen YAO Yuanshu QIAN Shuzhen CHEN Peifen WANG Yuanchun HUANG | 2007 | Acta Biochimica et Biophysica Sinica2007，39，7： | 9 |
| 8 | Transfer and Transformation of Soil Iron and Implications for Hydrogeomorpholocial Changes in Naoli River Catchment, Sanjiang Plain, Northeast China显示文摘Wetland soils are characterized by alternating redox process due to the fluctuation of waterlogged conditions. Iron is an important redox substance, and its transfer and transformation in the wetland ecosystem could be an effective indicator for the environment changes. In this paper, we selected the Naoli River catchment in the Sanjiang Plain, Northeast China as the study area to analyze the dynamics of transfer and transformation of soil iron, and the relationship between iron content change and environmental factors. The results show that the total and crystalline iron contents reach the peak in the depth of 60 cm in soil profile, while the amorphous iron content is higher in the topsoil. In the upper reaches, from the low to high landscape positions, the total and crystalline iron contents decrease from 62.98 g/kg to 41.61 g/kg, 22.82 g/kg to 10.53 g/kg respectively, while the amorphous iron content increases from 2.42 g/kg to 8.88 g/kg. Amorphous iron content has positive correlation with organic matter and soil water contents, while negative correlation with pH. Moreover, both the crystalline and amorphous iron contents present no correlation with total iron content, indicating that environmental factors play a more important role in the transfer and transformation of iron other than the content of the total iron. Different redoximorphic features were found along the soil profile due to the transfer and transformation of iron. E and B horizons of wetland soil in the study area have a matrix Chroma 2 or less, and all the soil types can meet the criteria of American hydric soil indicators except albic soil. | JIANG Ming LU Xianguo WANG Hongqing ZOU Yuanchun WU Haitao | 2011 | Chinese Geographical Science2011，21，2： | 7 |
| 9 | Meta-analysis of the effects of 1-methylcyclopropene(1-MCP)treatment on climacteric fruit ripening显示文摘1-Methylcyclopropene(1-MCP)is an inhibitor of ethylene perception that is widely used to maintain the quality of several climacteric fruits during storage.A large body of literature now exists on the effects of 1-MCP on climacteric fruit ripening for different species and environmental conditions,presenting an opportunity to use meta-analysis to systematically dissect these effects.We classified 44 ripening indicators of climacteric fruits into five categories:physiology and biochemistry,quality,enzyme activity,color,and volatiles.Meta-analysis showed that 1-MCP treatment reduced 20 of the 44 indicators by a minimum of 22%and increased 6 indicators by at least 20%.These effects were associated with positive effects on delaying ripening and maintaining quality.Of the seven moderating variables,species,1-MCP concentration,storage temperature and time had substantial impacts on the responses of fruit to 1-MCP treatment.Fruits from different species varied in their responses to 1-MCP,with the most pronounced responses observed in rosaceous fruits,especially apple,European pear fruits,and tropical fruits.The effect of gaseous 1-MCP was optimal at 1μl/l,with a treatment time of 12–24 h,when the storage temperature was 0℃for temperate fruits or 20℃for tropical fruits,and when the shelf temperature was 20℃,reflecting the majority of experimental approaches.These findings will help improve the efficacy of 1-MCP application during the storage of climacteric fruits,reduce fruit quality losses and increase commercial value. | Jing Zhang Yuanchun Ma Chao Dong Leon A.Terry Christopher B.Watkins Zhifang Yu Zong-Ming(Max)Cheng | 2020 | Horticulture Research2020，7，1： | 7 |
| 10 | Adaptive Spectral Clustering Ensemble Selection via Resampling and Population-Based Incremental Learning Algorithm显示文摘In this paper,we explore a novel ensemble method for spectral clustering.In contrast to the traditional clustering ensemble methods that combine all the obtained clustering results,we propose the adaptive spectral clustering ensemble method to achieve a better clustering solution.This method can adaptively assess the number of the component members,which is not owned by many other algorithms.The component clusterings of the ensemble system are generated by spectral clustering(SC) which bears some good characteristics to engender the diverse committees.The selection process works by evaluating the generated component spectral clustering through resampling technique and population-based incremental learning algorithm(PBIL).Experimental results on UCI datasets demonstrate that the proposed algorithm can achieve better results compared with traditional clustering ensemble methods,especially when the number of component clusterings is large. | XU Yuanchun JIA Jianhua | 2011 | Wuhan University Journal of Natural Sciences2011，16，3： | 5 |
| 11 | Determination of Total Flavonoids in Leaves of Paliurus ramosissimus and Orthogonal Experiment Optimization Process显示文摘[Objectives] To screen the optimal extraction conditions of flavonoids from leaves of Paliurus ramosissimus( Lour.) Poir.,measure the content of flavonoids in leaves of P. ramosissimus. using the Microplate Reader,and provide experimental basis for the development of medicinal resources of P. ramosissimus. [Methods] The ultrasonic extraction method was adopted and orthogonal design was carried out to study the effects of ethanol concentration( A),ultrasonic time( B),the solid-to-liquid ratio( C) on the extraction of flavonoids from leaves of P. ramosissimus. The Microplate Reader was used to measure the content of flavonoids in leaves of P. ramosissimus. in different extraction conditions,P. ramosissimus. and the optimal extraction conditions were used to measure the content of flavonoids from leaves of P. ramosissimus.[Results]Effects of the ultrasonic extraction method on the extraction rate of flavonoids from leaves of P. ramosissimus: extraction times >ethanol concentration > Ultrasound time > solid-liquid ratio. The screened optimal extraction process was: ethanol concentration of 65%,the solid-to-liquid ratio of 1∶ 25,ultrasonic time of 2 h and extraction times Under this condition,the extraction rate of total flavonoids in leaves of P. ramosissimus. was 2. 56%. [Conclusions] This method is simple and feasibility,reliable,and suitable for rapid measurement with large samples. | Yuanchun ZHUANG Chun ZHANG Lilan OU Pixian SHUI | 2018 | Medicinal Plant2018，9，2： | 5 |
| 12 | Accumulation Mechanisms and Evolution History of the Giant Puguang Gas Field,Sichuan Basin,China显示文摘稳固的沥青在 Puguang 煤气的地里在整个碳酸盐水库被发现,最大的煤气的地到目前为止在中国在海洋的碳酸盐发现了,证实 Puguang 煤气的地从一座 paleo 油水库演变。液体水管系统在这域里的集中的油累积的时候被重建,并且石油移植小径用一个 3-D 模型被建模并且由 geochemical 参数跟踪了。向前建模并且倒置跟踪与对方一起与一致,两个显示油在 Puguang-Dongyuezhai 结构积累了从一个生产厨房发源到 Puguang 气体地的西北。生存于富有腐殖质的有机物在东北四川盆,是垂直地近来源的岩石和旁边地在生产附近的厨房的液体水管系统的发展,并且集中油统治的器官富人的上面的二叠的来源岩石的免职从生产厨房的一个大区域发源,是为巨大的 Puguang 煤气的地从演变的巨大的paleo油水库的形成的三个要求。Puguang 煤气的地经历了三阶段的进化。累积以后的进程,特别在 hydrocarbon-water-rock 系统的器官无机的相互作用,深刻地不仅改变了石油液体的作文和特征,而且显然在水库改变了物理化学的条件并且导致了碳酸盐矿物质的复杂降水和答案。 | HAO Fang GUO Tonglou DU Chunguo ZOU Huayao CAI Xunyu ZHU Yangming LI Pingping WANG Chunwu ZHANG Yuanchun | 2009 | Acta Geologica Sinica(English Edition)2009，83，1： | 4 |
| 13 | Based on the Theory of Five Yun Six Qi to Study the Clinical Effect of Chaigui Decoction on Jueyin Type Hypertension显示文摘[Objectives]To study the clinical effect of Chaigui decoction(CGD)on Jueyin type hypertension based on the theory of Five Yun Six Qi.[Methods]52 patients with Jueyin type hypertension in Wuxi Hospital Affiliated to Nanjing University of Chinese Medicine from January,2020 to March,2021 were randomly divided into Western medicine control group(18 cases)and CGD group(34 cases).CGD group was treated with CGD,while the control group was treated with irbesartan or amlodipine.[Results]After treatment,the systolic blood pressure(SBP)of the two groups decreased significantly,the difference was statistically significant(P<0.05).After treatment,the diastolic blood pressure(DBP)of CGD group was significantly lower than that of the control group(P<0.05).[Conclusions]Based on the theory of Five Yun Six Qi,CGD has significant effect on Jueyin type hypertension,and the effect of reducing DBP is better than that of Western medicine control group. | Jingru GAO Hongjun ZHU Han YAN Xiaohai HU Yuanchun YAO | 2021 | Medicinal Plant2021，12，3： | 4 |
| 14 | A grid-based clustering algorithm for wild bird distribution显示文摘 | Yuwei WANG Yuanchun ZHOU Ying LIU Ze LUO Danhuai GUO Jing SHAO Fei TAN Liang WU Jianhui LI Baoping YAN | 2013 | Frontiers of Computer Science2013，7，4： | 4 |
| 15 | Cloud Storage Security Assessment Through Equilibrium Analysis显示文摘With ever greater amounts of data stored in cloud servers, data security and privacy issues have become increasingly important. Public cloud storage providers are semi-trustworthy because they may not have adequate security mechanisms to protect user data from being stolen or misused. Therefore, it is crucial for cloud users to evaluate the security of cloud storage providers. However, existing security assessment methods mainly focus on external security risks without considering the trustworthiness of cloud providers. In addition, the widely used thirdparty mediators are assumed to be trusted and we are not aware of any work that considers the security of these mediators. This study fills these gaps by assessing the security of public cloud storage providers and third-party mediators through equilibrium analysis. More specifically, we conduct evaluations on a series of game models between public cloud storage providers and users to thoroughly analyze the security of different service scenarios.Using our proposed security assessment, users can determine the risk of whether their privacy data is likely to be hacked by the cloud service providers;the cloud service providers can also decide on strategies to make their services more trustworthy. An experimental study of 32 users verified our method and indicated its potential for real service improvement. | Yuzhao Wu Yongqiang Lyu Yuanchun Shi | 2019 | Tsinghua Science and Technology2019，24，6： | 4 |
| 16 | Dual relations in physical and cyber space显示文摘With the rapid development of computer, communication, and sensing technology, our living space has been transformed from physical space into a space shared by physical space and cyberspace. In the light of this fact and based on analyzing the char- acteristics of physical and cyberspace, respectively, this paper proposed that there are dual relations be- tween physical space and cyberspace. Establishing dual relations is realized in the following two processes: the process of information extraction, analysis and structurization from physical space to cyberspace and the process of providing the information services from cyberspace to physical space by means of inferring the intention, state and demand of users, as well. HCI (Human Cyberspace Interaction) in dual space means to establish the dual relations, which embodied the human centered HCI, i.e. the interaction is carried out in the way accustomed to users and without distract- ing their attention. | XU Guangyou TAO Linmi ZHANG David SHI Yuanchun | 2006 | Chinese Science Bulletin2006，51，1： | 4 |
| 17 | Main Energy Paths and Energy Cascade Processes of the Two Types of Persistent Heavy Rainfall Events over the Yangtze River–Huaihe River Basin显示文摘Two types of persistent heavy rainfall events(PHREs) over the Yangtze River–Huaihe River Basin were determined in a recent statistical study: type A, whose precipitation is mainly located to the south of the Yangtze River; and type B, whose precipitation is mainly located to the north of the river. The present study investigated these two PHRE types using a newly derived set of energy equations to show the scale interaction and main energy paths contributing to the persistence of the precipitation. The main results were as follows. The available potential energy(APE) and kinetic energy(KE) associated with both PHRE types generally increased upward in the troposphere, with the energy of the type-A PHREs stronger than that of the type-B PHREs(except for in the middle troposphere). There were two main common and universal energy paths of the two PHRE types:(1) the baroclinic energy conversion from APE to KE was the dominant energy source for the evolution of large-scale background circulations; and(2) the downscaled energy cascade processes of KE and APE were vital for sustaining the eddy flow, which directly caused the PHREs. The significant differences between the two PHRE types mainly appeared in the lower troposphere, where the baroclinic energy conversion associated with the eddy flow in type-A PHREs was from KE to APE, which reduced the intensity of the precipitation-related eddy flow; whereas, the conversion in type-B PHREs was from APE to KE, which enhanced the eddy flow. | Yuanchun ZHANG Jianhua SUN Shenming FU | 2017 | Advances in Atmospheric Sciences2017，34，2： | 4 |
| 18 | N-doped residual carbon from coal gasification fine slag decorated with Fe_(3)O_(4)nanoparticles for electromagnetic wave absorption显示文摘The electromagnetic wave absorption(EMWA)performance of materials is affected by their dielectric and magnetic properties.Here,ferroferric oxide@N-doped residual carbon(Fe_(3)O_(4)@NRC)composites were successfully fabricated by decorating NRC with Fe_(3)O_(4)nanoparticles via a facile chemical co-precipitation method.The RC was obtained through acid treatment to remove the inorganic minerals in coal gasification fine slag.The structure,composition,thermal stability,morphology,and related EM parameters of the as-fabricated Fe_(3)O_(4)@NRC composites were thoroughly tested via analytical techniques.Notably,both the Fe_(3)O_(4)@NRC-2 and Fe_(3)O_(4)@NRC-3 composites exhibited superior EMWA capacity.When 40%mass was added,the value of minimal reflection loss(RL_(min))for Fe_(3)O_(4)@NRC-2 was-37.4 dB,and the effective absorption bandwidth(EAB,RL≤-10 dB)reached 4.16 GHz(13.84-18.00 GHz)at a thickness of 1.5 mm.Besides,the value of impedance matching was 1.00 as the RL_(min)was achieved.The results demonstrated that the EMWA performance of the composites could be adjusted by controlling the content of Fe_(3)O_(4)nanoparticles.The magnetic/carbon composites exhibited superior EMWA performance,thus promoting the resource utilization of residual carbon in coal gasification fine slag from coal gasification. | Jun He Shengtao Gao Yuanchun Zhang Xingzhao Zhang Hanxu Li | 2022 | Journal of Materials Science & Technology2022，，9： | 3 |
| 19 | Progress in Severe Convective Weather Forecasting in China since the 1950s显示文摘Located in the Asian monsoon region, China frequently experiences severe convective weather(SCW), such as short-duration heavy rainfall(SDHR), thunderstorm high winds, hails, and occasional tornadoes. Progress in SCW forecasting in China is closely related to the construction and development of meteorological observation networks,especially weather radar and meteorological satellite networks. In the late 1950 s, some county-level meteorological bureaus began to conduct empirical hail forecasting based on observations of clouds and surface meteorological variables. It took over half a century to develop a modern comprehensive operational monitoring and warning system for SCW forecast nationwide since the setup of the first weather radar in 1959. The operational SCW forecasting, including real-time monitoring, warnings valid for tens of minutes, watches valid for several hours, and outlooks covering lead times of up to three days, was established in 2009. Operational monitoring and forecasting of thunderstorms,SDHR, thunderstorm high winds, and hails have been carried out. The performance of operational SCW forecasting will be continually improved in the future with the development of convection-resolving numerical models(CRNMs), the upgrade of weather radar networks, the launch of new-generation meteorological satellites, better understanding of meso-γ and microscale SCW systems, and further application of artificial intelligence technology and CRNM predictions. | Xiaoling ZHANG Jianhua SUN Yongguang ZHENG Yuanchun ZHANG Ruoyun MA Xinlin YANG Kanghui ZHOU Xuqing HAN | 2020 | Journal of Meteorological Research2020，34，4： | 3 |
| 20 | The comparison of statistical features and synoptic circulations between the eastward-propagating and quasi-stationary MCSs during the warm season around the second-step terrain along the middle reaches of the Yangtze River显示文摘Mesoscale convective systems(MCSs) around the second-step terrain(106°–113°E, 28°–35°N), along the middle reaches of the Yangtze River, were detected, tracked and classified using a black body temperature(TBB) dataset during May to August 2000–2016(except 2005). The MCSs were divided into eastward-propagating(EP) and quasi-stationary(QS) types, to compare their spatial and temporal distributions and convective intensities, and to identify the favorable synoptic conditions for the formation and evolution of EP MCSs. The results showed that both MCS types occurred most often in July. The EP MCSs were mainly initiated over the eastern regions of the study area, while the QS type mainly originated in the western regions of the study area. Both MCS types mainly formed in the afternoon, but a second peak occurred in the early morning for QS MCSs. The EP MCSs had a larger cloud area at their mature stage and a lower cloud brightness temperature, indicating more intense convection. Additionally, the longer lifetime and further eastward propagation of the EP MCSs meant that they had a great influence on the precipitation over the middle and lower reaches of the Yangtze River. Synoptic circulation analysis demonstrated that the combination of the mid-level low trough east of the Tibetan Plateau(TP), and the western pacific subtropical high(WPSH), favored the formation and eastward propagation of EP MCSs. The positive vertical relative vorticity and stronger vertical wind shear provided dynamic conditions favorable for convective organization and development. Furthermore, a stronger low level jet imported warm and moist air to the eastern edge of, and the regions east of, the second-step terrain. The substantial convergence of water vapor promoted the development and long-lived maintenance of the EP MCSs. | Ruyi YANG Yuanchun ZHANG Jianhua SUN Jun LI | 2020 | Science China Earth Sciences2020，63，8： | 3 |
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