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Diagnostic Study of an Extreme Explosive Cyclone over the Kuroshio/Kuroshio Extension Region

Journal of Ocean University of China 2024年第3期23卷 605-617页

作者： ZHANG Shuqin liAO Qinghua liU Chunlei GAO Xiaoyu LONG Jingchao li pengyuan XU Jianjun College of Ocean and Meteorology Guangdong Ocean UniversityZhanjiang 524088China South China Sea Institute of Marine Meteorology Guangdong Ocean UniversityZhanjiang 524088China CMA-GDOU Joint Laboratory for Marine Meteorology Guangdong Ocean UniversityZhanjiang 524088China Key Laboratory of Climate Resources and Environment in Continental Shelf Sea and Deep Sea of Department of Education of Guangdong ProvinceGuangdong Ocean UniversityZhanjiang 524088China State Key Laboratory of Severe Weather Chinese Academy of Meteorological SciencesBeijing 100081China Department of Marine Meteorology Ocean-Atmosphere Interaction and Climate LaboratoryKey Laboratory of Physical OceanographyOcean University of ChinaQingdao 266100China

Explosive cyclones(ECs)occur frequently over the Kuroshio/Kuroshio Extension *** most rapidly intensified EC over the Kuroshio/Kuroshio Extension region during the 42 years(1979-2020)of cold seasons(October-April)was studied to reveal the variations of the key factors at different explosive-developing *** EC had weak low-level baroclinicity,mid-level cyclonic-vorticity advection,and strong low-level water vapor convergence at the initial explosive-developing *** low-level baroclinicity and mid-level cyclonic-vorticity advection increased substantially during the maximum-deepening-rate *** diagnostic analyses using the Zwack-Okossi equation showed that diabatic heating was the main contributor to the initial rapid intensification of this *** cyclonic-vorticity advection and warm-air advection enhanced rapidly in the middle and upper troposphere and contributed to the maximum rapid intensification,whereas the diabatic heating weakened slightly in the mid-low *** relative contribution of the diabatic heating decreased from the initial explosive-developing stage to the maximum-deepening-rate stage due to the enhancement of other factors(the cyclonic-vorticity advection and warm-air advection).Furthermore,the physical factors contributing to this EC varied with the explosive-developing *** non-key factors at the initial explosive-developing stage need attention to forecast the rapid intensification.

关键词： explosive cyclone diabatic heating cyclonic-vorticity advection rapid intensification the Kuroshio/Kuroshio Extension region

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基于非下降线搜索的改进PRP共轭梯度方法及在图像恢复中的应用

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现代信息科技 2024年第17期8卷 62-67页

作者：李朋原郑州警察学院图像与网络侦查系河南郑州450000

PRP方法是最有效的非线性共轭梯度优化方法之一,然而该方法不能保证产生目标函数的下降方向,这给一般函数的全局收敛带来了困难。为了保证PRP方法的全局收敛性,提出了一种改进的PRP共轭梯度方法。文章以非凸优化问题为目标,简要介绍了... 详细信息

PRP方法是最有效的非线性共轭梯度优化方法之一,然而该方法不能保证产生目标函数的下降方向,这给一般函数的全局收敛带来了困难。为了保证PRP方法的全局收敛性,提出了一种改进的PRP共轭梯度方法。文章以非凸优化问题为目标,简要介绍了非下降线搜索技术以及一些适当的假设条件,探讨了改进PRP方法的全局收敛性。基于MATLAB软件工具,验证了新方法在处理无约束优化和图像恢复问题时的有效性和实用性。

关键词：共轭梯度方法非下降线搜索全局收敛性无约束优化图像修复

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辅广《诗童子问》版本考

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图书馆界 2024年第3期 29-37,70页

作者：李鹏远四川大学文学与新闻学院四川成都610207

《诗童子问》是宋儒辅广的著作,其在《诗集传》基础上疏解、发挥朱熹之说而成。此书今存最早版本为元至正四年崇化余志安勤有堂刊刻二十卷本,明末又有毛氏汲古阁刻十卷本,后世诸本皆源出此两本。其中,中国国家图书馆藏明抄本、日本国立... 详细信息

《诗童子问》是宋儒辅广的著作,其在《诗集传》基础上疏解、发挥朱熹之说而成。此书今存最早版本为元至正四年崇化余志安勤有堂刊刻二十卷本,明末又有毛氏汲古阁刻十卷本,后世诸本皆源出此两本。其中,中国国家图书馆藏明抄本、日本国立公文书馆藏抄本皆影抄写自前者,四库全书本、复旦大学藏清抄本以及日本文化十二年官刻本则属后者版本系统。

关键词：诗童子问辅广版本版本流变

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爆发性气旋研究进展

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中国海洋大学学报（自然科学版） 2024年第10期54卷 1-12页

作者：傅刚鄢珅倪晶李鹏远陈莅佳中国海洋大学海洋与大气学院海洋气象学系山东青岛266100 青岛海洋科技中心海洋动力过程与气候功能实验室山东青岛266237 青岛市气象局山东青岛266003 青岛海洋气象研究院山东青岛266000

温带气旋是在副热带地区形成的低压天气系统,与热带气旋不同,温带气旋常伴有锋面系统,被认为是中纬度地区日常天气变化舞台上最重要的“演员”,与强风、暴雨和暴雪等极端天气关系密切。在北半球和南半球,它们分别呈逆时针和顺时针方向旋... 详细信息

温带气旋是在副热带地区形成的低压天气系统,与热带气旋不同,温带气旋常伴有锋面系统,被认为是中纬度地区日常天气变化舞台上最重要的“演员”,与强风、暴雨和暴雪等极端天气关系密切。在北半球和南半球,它们分别呈逆时针和顺时针方向旋转,在秋冬季节中高纬度海域上空经常出现大量快速增强的温带气旋,被称为“爆发性气旋”。本文是在2017年《爆发性气旋研究的回顾》一文的基础上,综述了2017年以后国内外在爆发性气旋研究领域的最新进展,并对未来研究方向进行了展望。

关键词：温带气旋爆发性气旋逆时针旋转顺时针旋转

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The 9–11 November 2013 Explosive Cyclone over the Japan Sea- Okhotsk Sea: Observations and WRF Modeling Analyses

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Journal of Ocean University of China 2020年第5期19卷 989-1004页

作者： FU Gang JING Miaomiao li pengyuan Department of Marine Meteorology Ocean-Atmosphere Interaction and Climate LaboratoryKey Laboratory of Physical OceanographyOcean University of ChinaQingdao 266100China Division of Oceanic Dynamics and Climate Qingdao National Laboratory for Marine Science and TechnologyQingdao 266100China Qingdao Hatran Ocean Intelligence Technology Company limited Qingdao 266404China

During the period from 9 to 11 November 2013,an explosive cyclone(EC)occurred over the Japan Sea-Okhotsk *** EC initially formed around 18 UTC 9 November over the Japan Sea and developed over the Okhotsk Sea when moving *** had a minimum sea level pressure of 959.0 hPa,a significant deepening rate of central pressure of 2.9 Bergeron,and a maximum instantaneous wind speed of 42.7 m s−*** paper aims to investigate the conditions that contributed to the rapid development of this low-pressure system through analyses of both observations and the Weather Research Forecasting(WRF)modeling *** evolutionary processes of this EC were examined by using Final Analyses(FNL)data,Multi-Functional Transport Satellites-1R(MTSAT-1R)data,upper observation data and surface observation ***-3.5 modeling results were also used to examine the development mechanism of this *** is shown that the interaction between upper-level and low-level potential vorticity seemed to be very essential to the rapid development of this EC.

关键词： explosive cyclone the Japan Sea-Okhotsk Sea observations WRF-3.5 modeling results potential vorticity

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Effects of Electron Donating Ability of Substituents and Molecular Conjugation on the Electronic Structures of Organic Radicals

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Chemical Research in Chinese Universities 2023年第2期39卷 202-207页

作者： li pengyuan FENG Lu li Guangyue BAI Fuquan International Joint Research Laboratory of Nano-Micro Architecture Chemistry Institute of Theoretical Chemistry and College of ChemistryJilin UniversityChangchun130021P.R.China College of Chemical Engineering North China University of Science and TechnologyTangshan063210P.R.China International Innovation Center for Forest Chemicals and Materials Nanjing Forestry UniversityNanjing210037P.R.China

The geometries and electronic structures of a series of electron donor-acceptor radical molecules have been studied *** computational results show that the introduction of substituents with strong electron donating ability into tri-(2,4,6-trichlorophenyl)methyl(TTM)radicals enables the radical molecules to form the non-Aufbau electronic *** difficulty of forming the non-Aufbau electronic structure decreases with the enhancement of the electron donating ability of the substituent,but the expansion of the molecular conjugated system is not conducive to the *** hybridization of different fragments in molecular orbitals results in the disproportionation of orbital energy level and forms a staggered energy level *** electronic structure of radical molecules can be adjusted by substituents and molecular skeleton profoundly,which is a very effective means for molecular design.

关键词： Radical emitter Non-Aufbau electronic structure Molecular orbital characteristics Density functional theory and time-dependent density functional theory(DFT and TDDFT)

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Diagnostic Analyses and Numerical Modeling of Explosive Cyclone over Northwestern Pacific on January 11-13,2012

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Journal of Ocean University of China 2022年第4期21卷 935-945页

作者： WANG Guanlan SUN Baitang SUN Yawen li pengyuan National Meteorological Center Beijing 100081China College of Oceanic and Atmospheric Sciences Ocean University of ChinaQingdao 266100China

In this paper,we use FNL grid data obtained from the National Centers for Environmental Prediction(NCEP)to analyze an explosive cyclone(EC)that occurred over the northwestern Pacific Ocean from January 11 to 13,*** simulate the EC,we used the Weather Research and Forecasting model(WRFV3.5).The cyclone outbreak occurred east of Japan from January 11 to 12 and weakened near the Kamchatka Peninsula on January *** analysis results show a distinct frontal structure,in which the high potential vorticity(PV)of the upper troposphere extends downward to the surface,which can facilitate EC development.A low-level jet stream develops with the EC,which can lead to more distinct *** results of sea surface temperature(SST)sensitivity tests suggest that changes in the SST can affect cyclone intensity,but have little effect on its *** small changes are made to the SST,the air pressure at the cyclonic center responds more distinctly to an increased SST than a decreased *** results of our latent heat release test suggest that diabatic heating processes lead to maximum PV values in the lower *** heat is also one of the important factors influencing EC development.

关键词： northwestern Pacific explosive cyclone diagnostic analyses SST sensitivity tests latent heat release test

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A 38-Year Climatology of Explosive Cyclones over the Northern Hemisphere

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Advances in Atmospheric Sciences 2020年第2期37卷 143-159页

作者： Gang FU Yawen SUN Jilin SUN pengyuan li Department of Marine Meteorology Ocean−Atmosphere Interaction and Climate LaboratoryKey Laboratory of Physical OceanographyOcean University of ChinaQingdao 266100China Division of Oceanic Dynamics and Climate Qingdao National Laboratory for Marine Science and TechnologyQingdao 266100China North China Sea Marine Forecasting Center Qingdao 266100China Shandong Provincial Key Laboratory of Marine Ecological Environment and Disaster Prevention and Mitigation Qingdao 266100China

Explosive cyclones(ECs)over two basins in the Northern Hemisphere(20°-90°N)from January 1979 to December2016 are investigated using ERA-Interim and Optimum Interpolation Sea Surface Temperature(OISST)*** classical definition of an EC is modified considering not only the rapid drop of the central sea level pressure of the cyclone,but also the strong wind speed at the height of 10 m in which maximum wind speeds greater than 17.2 m s^-1are *** to the locations of the northern Atlantic and northern Pacific,the whole Northern Hemisphere is divided into the"A region"(20°-90°N,90°W-90°E)and"P region"(20°-90°N,90°E-90°W).Over both the A and P regions,the climatological features of ECs,such as their spatial distribution,intensity,seasonal variation,interannual variation,and moving tracks,are documented.

关键词： explosive cyclone Atlantic basin Pacific basin Northern Hemisphere annual climatology seasonal climatology spatial distribution moving track

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Characteristics of Atmospheric Rivers over the East Asia in Middle Summers from 2001 to 2016

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Journal of Ocean University of China 2021年第2期20卷 235-243页

作者： FU Gang liU Shan li Xiaodong li pengyuan CHEN lijia Department of Marine Meteorology Ocean-Atmosphere Interaction and Climate LaboratoryKey Laboratory of Physical OceanographyOcean University of ChinaQingdao 266100China Division of Oceanic Dynamics and Climate Qingdao National Laboratory for Marine Science and TechnologyQingdao 266100China Qingdao Meteorological Bureau Qingdao 266003China Qingdao Engineering Technology Research Center for Meteorological Disaster Prevention Qingdao 266003China

Atmospheric Rivers(ARs) are narrow and elongated water vapor belts in troposphere with meridional transport across the mid-latitudes towards high-latitudes. Compared with ARs occurred over the northeastern Pacific, the western coast of North America and Europe, the ARs over the East Asia have received less attention. In this paper, the characteristics of ARs which affected China in the area 20?–60?N, 95?–165?E in the middle summer season from 2001 to 2016 were investigated by using European Center for Medium-Range Weather Forecasts(ECMWF) ERA-Interim reanalysis data and Multi-functional Transport Satellites-1 R(MTSAT-1 R) infrared data. Totally, 134 ARs occurred during that period, and averagely 8.4 ARs occurred per year. Statistically, 101 ARs were in east-west orientation, and 33 ARs were in north-south orientation, which accounts for about 75% and 25%, respectively. Herein we report the occurrence number, duration time, intensity, length, width, ratio of length to width, and extension orientation of these ARs, which provide the basic information for those who have interest in ARs over the East Asia.

关键词： narrow and elongated water vapor belt East Asia middle summer season Meiyu/Baiu front characteristics of atmospheric rivers infrared satellite data

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An Observational and Modeling Study of Extratropical Transition of Hurricane Sandy in 2012

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Journal of Ocean University of China 2015年第5期14卷 783-794页

作者： FU Dan li pengyuan FU Gang Department of Meteorology Ocean University of China

Around 30 October 2012, Hurricane Sandy made landfall along the New Jersey shoreline after its completion of extratropical transition and transformation into an extratropical cyclone. The strong gale induced a catastrophic storm surge, and caused 72 death and damage of more than $50 billion. In this paper, the evolutionary process and spatial structure of the Hurricane Sandy during its extratropical transition were investigated by using Weather Research and Forecasting （WRF） version 3.3.1 modeling resuits and National Center for Environmental Prediction （NCEP） Coupled Forecast System model version 2 reanalysis datasets （CFSv2）. It is found that during the upper-level trough interaction on 29 October, Sandy gradually fused with a pre-existing mid-latitude low-pressure system, and finished the re-intensification. WRF modeling results showed that the second peak occurred mainly due to the enhanced vertical motion, reduced vertical wind shear as well as the supplement of potential vorticity resulting from trough interaction over the southeast of Great Lakes. The cold continental air from the back of trough was encircled within the warm core system cyclonically, forming the characteristic of warm seclusion.

关键词： Hurricane Sandy extratropical transition mid latitude trough WRF modeling

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