A heavy rainstorm named Beijing "7.21"heavy rainstorm hit Beijing on 21 to 22 July 2012, which is recorded as the most severe rainstorm since 1951. The daily precipitation amount in many stations in Beijing ...A heavy rainstorm named Beijing "7.21"heavy rainstorm hit Beijing on 21 to 22 July 2012, which is recorded as the most severe rainstorm since 1951. The daily precipitation amount in many stations in Beijing has broken the history record. Based on the NCAR/NCEP reanalysis data and precipitation observation,the large-scale conditions which caused the "7.21"heavy rainstorm are investigated, with the emphasis on the relationship between it and an equatorial convergence zone, Asian summer monsoon as well as the tropical cyclone over the ocean from the Philippines to the South China Sea(SCS). The results indicated that a great deal of southerly warm and wet moisture carried by northward migrating Asian summer monsoon provided plenty of moisture supplying for the "7.21"heavy rainstorm. When the warm and wet moisture met with the strong cold temperature advection induced by cold troughs or vortexes, an obviously unstable stratification formed, thus leading to the occurrence of heavy precipitation. Without this kind of intense moisture transport, the rainstorm only relying on the role of the cold air from mid-and higher-latitudes could not reach the record-breaking intensity. Further research suggested that the northward movement of an Asian monsoonal warm and wet moisture transport conveyor(MWWTC) was closely related with the active phase of a 30-60 day intra-seasonal oscillation of the Asian summer monsoon. During this time, the monsoon surge triggered and maintained the northward movement of the MWWTC. In addition, compared with another heavy rainstorm named"63.8"heavy rainstorm, which occurred over the Huaihe River Basin in the mid-August 1963 and seriously affected North China, a similar MWWTC was also observed. It was just the intense interaction of the MWWTC with strong cold air from the north that caused this severe rainstorm.展开更多
Objective:To identify topics attracting growing research attention as well as frontier trends of acupuncture-neuroimaging research over the past two decades.Methods:This paper reviewed data in the published literature...Objective:To identify topics attracting growing research attention as well as frontier trends of acupuncture-neuroimaging research over the past two decades.Methods:This paper reviewed data in the published literature on acupuncture neuroimaging from 2000 to 2020,which was retrieved from the Web of Science database.Cite Space was used to analyze the publication years,countries,institutions,authors,keywords,co-citation of authors,journals,and references.Results:A total of 981 publications were included in the final review.The number of publications has increased in the recent 20 years accompanied by some fluctuations.Notably,the most productive country was China,while Harvard University ranked first among institutions in this field.The most productive author was Tian J with the highest number of articles(50),whereas the most co-cited author was Hui KKS(325).Evidence-Based Complementary and Alternative Medicine(92)was the most prolific journal,while Neuroimage was the most co-cited journal(538).An article written by Hui KKS(2005)exhibited the highest co-citation number(112).The keywords"acupuncture"(475)and"electroacupuncture"(0.10)had the highest frequency and centrality,respectively.Functional magnetic resonance imaging(fMRI)ranked first with the highest citation burst(6.76).Conclusion:The most active research topics in the field of acupuncture-neuroimaging over the past two decades included research type,acupoint specificity,neuroimaging methods,brain regions,acupuncture modality,acupoint specificity,diseases and symptoms treated,and research type.Whilst research frontier topics were"nerve regeneration","functional connectivity","neural regeneration","brain network","fMRI"and"manual acupuncture".展开更多
基金National(Key)Basic Research,Development(973)Program of China(2013CB430202)National Natural Science Foundation of China(41130960)Special Project in Climate Change of China Meteorological Administration(CCSF201701)
文摘A heavy rainstorm named Beijing "7.21"heavy rainstorm hit Beijing on 21 to 22 July 2012, which is recorded as the most severe rainstorm since 1951. The daily precipitation amount in many stations in Beijing has broken the history record. Based on the NCAR/NCEP reanalysis data and precipitation observation,the large-scale conditions which caused the "7.21"heavy rainstorm are investigated, with the emphasis on the relationship between it and an equatorial convergence zone, Asian summer monsoon as well as the tropical cyclone over the ocean from the Philippines to the South China Sea(SCS). The results indicated that a great deal of southerly warm and wet moisture carried by northward migrating Asian summer monsoon provided plenty of moisture supplying for the "7.21"heavy rainstorm. When the warm and wet moisture met with the strong cold temperature advection induced by cold troughs or vortexes, an obviously unstable stratification formed, thus leading to the occurrence of heavy precipitation. Without this kind of intense moisture transport, the rainstorm only relying on the role of the cold air from mid-and higher-latitudes could not reach the record-breaking intensity. Further research suggested that the northward movement of an Asian monsoonal warm and wet moisture transport conveyor(MWWTC) was closely related with the active phase of a 30-60 day intra-seasonal oscillation of the Asian summer monsoon. During this time, the monsoon surge triggered and maintained the northward movement of the MWWTC. In addition, compared with another heavy rainstorm named"63.8"heavy rainstorm, which occurred over the Huaihe River Basin in the mid-August 1963 and seriously affected North China, a similar MWWTC was also observed. It was just the intense interaction of the MWWTC with strong cold air from the north that caused this severe rainstorm.
基金Supported by the Leading Talents of Traditional Chinese Medicine in Jiangsu(No.k2018j06)。
文摘Objective:To identify topics attracting growing research attention as well as frontier trends of acupuncture-neuroimaging research over the past two decades.Methods:This paper reviewed data in the published literature on acupuncture neuroimaging from 2000 to 2020,which was retrieved from the Web of Science database.Cite Space was used to analyze the publication years,countries,institutions,authors,keywords,co-citation of authors,journals,and references.Results:A total of 981 publications were included in the final review.The number of publications has increased in the recent 20 years accompanied by some fluctuations.Notably,the most productive country was China,while Harvard University ranked first among institutions in this field.The most productive author was Tian J with the highest number of articles(50),whereas the most co-cited author was Hui KKS(325).Evidence-Based Complementary and Alternative Medicine(92)was the most prolific journal,while Neuroimage was the most co-cited journal(538).An article written by Hui KKS(2005)exhibited the highest co-citation number(112).The keywords"acupuncture"(475)and"electroacupuncture"(0.10)had the highest frequency and centrality,respectively.Functional magnetic resonance imaging(fMRI)ranked first with the highest citation burst(6.76).Conclusion:The most active research topics in the field of acupuncture-neuroimaging over the past two decades included research type,acupoint specificity,neuroimaging methods,brain regions,acupuncture modality,acupoint specificity,diseases and symptoms treated,and research type.Whilst research frontier topics were"nerve regeneration","functional connectivity","neural regeneration","brain network","fMRI"and"manual acupuncture".
