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| 1 | A Diagnostic Study of Explosive Development of Extratropical Cyclone over East Asia and West Pacific Ocean显示文摘ADiagnosticStudyofExplosiveDevelopmentofExtratropicalCycloneoverEastAsiaandWestPacificOcean￥JiaYiqin(贾逸勤)andZhaoSixiong(赵思雄)(... | 贾逸勤 赵思雄 | 1994 | Advances in Atmospheric Sciences1994，11，3： | 13 |
| 2 | A Dynamic Analysis and Numerical Simulation of Explosive Development of an Extratropical Cyclone Over Land显示文摘The present paper has made a dynamic and diagnostic study of the process of explosive deepening of an extratropical cyclone over North China on April 25-26, 1983, in order to gain an insight into the physical mechanism of explosive development of cyclone over land. It turns out that this cyclone occurred in the strong baroclinic zone, and the vorticity and thermal advection triggered the initial development of the cyclone. Subsequently, as the rainfall increased, the effect of condensational heating became more and more important. During the time period of rapid intensification (from 1200GMT 25 to 0000GMT 26 April, 1983, the central surface pressure fell down from 998. 2 to 988. 3 hPa), the peak of diabatic heating profile continuously descended, leading to a rapid increase in heating amount in the lower troposphere. This condition is favorable to the explosive development of rotational circulation or vortex. The numerical simulations have further demonstrated the importance of the lowering of heating | 丁一汇 朱彤 | 1994 | Science China Chemistry1994，37，5： | 3 |
| 3 | Structure Analyses of the Explosive Extratropical Cyclone:A Case Study over the Northwestern Pacific in March 2007显示文摘The synoptic situation and mesoscale structure of an explosive extratropical cyclone over the Northwestern Pacific in March 2007 are investigated through weather station observations and data reanalysis. The cyclone is located beneath the poleward side of the exit of a 200 hPa jet, which is a strong divergent region aloft. At mid-level, the cyclone lies on the downstream side of a well-developed trough, where a strong ascending motion frequently occurs. Cross-section analyses with weather station data show that the cyclone has a warm and moist core. A ‘nose' of the cold front, which is characterized by a low-level protruding structure in the equivalent potential temperature field, forms when the cyclone moves offshore. This ‘nose' structure is hypothesized to have been caused by the heating effect of the Kuroshio Current. Two low-level jet streams are also identified on the western and eastern sides of the cold front. The western jet conveys cold and dry air at 800–900 hPa. The wind in the northern part is northeasterly, and the wind in the southern part is northwesterly. By contrast, the eastern jet carries warm and moist air into the cyclone system, ascending northward from 900 hPa to 600–700 hPa. The southern part is dominated by the southerly wind, and the wind in the northern part is southwesterly. The eastern and western jets significantly increase the air temperature and moisture contrast in the vicinity of the cold front. This increase could play an important role in improving the rapid cyclogenesis process. | WANG Shuai FU Gang PANG Huaji | 2017 | Journal of Ocean University of China2017，16，6： | 1 |
| 4 | ENERGY DISPERSION EFFECTS ON EXPLOSIVE DEVELOPMENT OF MARINE CYCLONES显示文摘A dominant role played by energy dispersion in the explosive development of extratropicalmarine cyclones over the Northwest Pacific has been revealed based on both the eddy energyequations and the energy flux vectors of nonlinear wave packet.At the initial and explosive time.the eddy energy from neighboring upstream systems beyond the radius of Rossby deformation isdispersed into the eddy energy center associated with the cyclone via ageostrophic geopotentialfluxes,and results in the rapid increase of eddy kinetic energy and the occurrence of explosivecyclogenesis.When the cyclone begins to decay,its corresponding eddy energy is exporteddownstream and hence triggers the growth of new perturbation downstream.Through generalizingthe energy flux vectors of quasigeostrophic wave packets to the nonlinear forms and making use ofthe relationship between the energy flux vectors and the total eddy energy,the approximationexpressions of the total group velocity and relative group velocity are derived,and then they areused to compute an explosive case.The normalized ageostrophic geopotential fluxes by dividing thevolume integral of ageostrophic geopotential fluxes by the integral of the total eddy energydetermine the relative group velocity at which the eddy energy is spreading out,and they can beused to evaluate the position of next new disturbance.The nonlinear advective fluxes influenceprimarily the phase speed and translation of the cyclones.The results in this paper facilitate toexpanding the mechanism research on explosive cyclones and have great significance for predictingthe explosive intensification and downstream disturbance growth. | 黄立文 秦曾灏 | 1998 | Acta meteorologica Sinica1998，12，4： | 1 |
| 5 | ANALYSIS OF A CASE OF EAST ASIA COASTAL CYCLOGENESIS显示文摘The evolution of an explosive cyclone off the East Asia coast in March 1979 is described.A shortwave trough in thesouthern branch of upper-level westerlies initiated the incipient cyclone.Later,a polar trough in the north amplified andbecame in phase with the southern shortwave to form a major trough.This major trough was responsible for the rapidintensification of the surface cyclone.In the early development stage,warm and moist air was transported northward tothe developing area by a strong low-level jet.The ageostrophic wind associated with the low-level jet contributed to thefrontogenesis,creating a favorable low-level environment for the rapid deepening.A low-level positive potentialvorticity anomaly was created prior to the onset of rapid deepening.It was a result of frontal cloud condensation.Thecyclone intensified rapidly when stratospheric air with high potential vorticity penetrated to the mid-troposphere.Therapid deepening took place at a location under the left-exit region of an amplifying jet streak behind the major troughand the right-entrance region of another anticyclonically-curved subtropical jet streak in a quasi-stationary ridge overJapan.Due to the blocking effect of the Tibetan Plateau,two shortwave disturbances were observed in the upper-levelwesterlies on the north and south sides of the Plateau.The southern disturbance initiated the incipient surface cyclone,while the amplifying northern disturbance was responsible for the rapid deepening.Thus,the evolution of the explosivecyclone in this case can be regarded as consecutive Petterssen’s 'type-B' cyclogenesis in two separate stages. | 陈受钧 郭英华 白乐生 | 1993 | Acta meteorologica Sinica1993，7，4： | 0 |
| 6 | LOCAL ENERGETICS ON EXPLOSIVE DEVELOPMENT OF EXTRATROPICAL MARINE CYCLONE显示文摘Local energetics on explosive development of extratropical marine cyclone was proposed and adiagnosis of the representative cases was performed from local balance,net volume integrationbudget and vertical distribution using the derived eddy kinetic energy equation and eddy availablepotential energy equation.The results revealed that three primary scenarios are responsible for therapid growth of eddy kinetic energy and explosive cyclogenesis,and that a primary explosivedevelopment mechanism is the enhanced baroclinic instability by eddy heat transport and eddydiabatic heating,and that the explosive eyclogenesis is essentially a product of the peculiarclimatological background bearing strong thermal difference in cold season and its conversionpotential. | 黄立文 秦曾灏 吴秀恒 邹早建 | 1999 | Acta meteorologica Sinica1999，13，1： | 0 |
| 7 | NUMERICAL TEST OF AN EARLY-SUMMER EXPLOSIVE CYCLONE EVENT IN EAST ASIA显示文摘A series of ten numerical tests are carried out using smoothing techniques in the PSU/NACRmesoscale model MM5 initial field in order to study the development reasons of a pre-summeruncommon explosive event which took place in East Asia from 1—2 June.1993.The integrationfields are compared with that of original results obtained by non-smoothed initial field.The resultsshow that:(1)After the northern trough is smoothed,its corresponding cold air can not movedownward and southward.Only a weak cyclone system forms south of 25°N after 24 h integration.(2)After the southern strong moisture transportation channel is smoothed,the northem troughsystem can only form a weak trough along the east coast of China after 24 h integration.(3)Thesetwo separate low trough systems in the southern and northern jet systems,with strong warmmoisture transportation channel and cold air respectively,are both necessary for explosive cyclonedevelopment.In such an unfavorable season and location for explosive cyclone to take place,onlyafter these two low troughs merged into a strong low vortex can the surface cyclone he developedexplosively.Both the northern trough system and the southern moisture transportation channel areall indispensable for the explosive cyclone development.This explosive cyclone event is the resultof the interaction of northern and southern systems. | 杨福全 Isamu YAGAI | 2000 | Acta meteorologica Sinica2000，14，3： | 0 |
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