检索结果-南通市图书馆

The evolution of hollow symmetric-PV tower during the landfall of Typhoon Mujigae(2015)

Frontiers of Earth Science 2019年第4期13卷 817-828页

作者： Baofeng JIAO Lingkun RAN xinyong shen Key Laboratory of Meteorological Disaster Ministry of EducationNanjing University of Information Science and TechnologyNanjing 210044China Joint International Research Laboratory of Climate and Environment Change Nanjing University of Information Science and TechnologyNanjing 210044China Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters Nanjing University of Information Science and TechnologyNanjing 210044China Institute of Atmospheric Physics Chinese Academy of SciencesBeijing 100029China University of Chinese Academy of Sciences Beijing 100029China Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai) Zhuhai 519082China

The evolution of Typhoon Mujigae(2015)during the landfall period is determined using potential vorticity(PV)based on a high-resolution numerical *** heating from deep moist convections in the eyewall produces a hollow PV tower extending from the lower troposphere to the middle *** the potential temperature and wind fields could be highly asymmetric during landfall,the fields are divided into symmetric and asymmetric ***,PV is split into three parts:symmetric PV,first-order asymmetric PV,and quadratic-order asymmetric *** calculating the azimuth mean,the first-order term *** symmetric PV is at least one order of magnitude larger than the azimuthal mean quadratic-order term,nearly accounting for the mean ***,the symmetric PV tendency equation is derived in cylindrical *** budget terms include the symmetric heating term,flux divergence of symmetric PV advection due to symmetric flow,flux divergence of partial first-order PV advection due to asymmetric flow,and the conversion term between the symmetric PV and quadratic-order asymmetric *** diagnostic results indicate that the symmetric heating term is responsible for the hollow PV tower generation and *** symmetric flux divergence largely offsets the symmetric heating contribution,resulting in a horizontal narrow ring and vertical extension *** conversion term contribution is comparable to the mean term contributions,while the contribution of the partial first-order PV asymmetric flux divergence is apparently *** conversion term implicitly contains the combined effects of processes that result in asymmetric *** term tends to counteract the contribution of symmetric terms before landfall and favor horizontal PV mixing after landfall.

关键词： landfall typhoon potential vorticity hollow PV tower asymmetric features

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Effects of Doubled Carbon Dioxide on Rainfall Responses to Large-Scale Forcing:A Two-Dimensional Cloud-Resolving Modeling Study

引用

Advances in Atmospheric Sciences 2014年第3期31卷 525-531页

作者： LI Xiaofan shen xinyong LIU Jia Department of Earth Sciences Zhejiang University Key Laboratory of Meteorological Disaster of the Ministry of Education Nanjing University of Information Science and Technology

ABSTRACT Rainfall responses to doubled atmospheric carbon dioxide concentration were investigated through the analysis of two pairs of two-dimensional cloud-resolving model sensitivity experiments. One pair of experiments simulated pre-summer heavy rainfall over southern China around the summer solstice, whereas the other pair of experiments simulated tropical rainfall around the winter solstice. The analysis of the time and model domain mean heat budget revealed that the enhanced local atmospheric warming was associated with doubled carbon dioxide through the weakened infrared radiative cooling during the summer solstice. The weakened mean pre-summer rainfall corresponded to the weakened mean infrared radiative cooling. Doubled carbon dioxide increased the mean tropical atmospheric warming via the enhanced mean latent heat in correspondence with the strengthened mean infrared radiative cooling during the winter solstice. The enhanced mean tropical rainfall was associated with the increased mean latent heat.

关键词： doubled carbon dioxide radiation latent heat condensation rainfall cloud-resolving model simulation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Three-Dimensional Wind Field Retrieved from Dual-Doppler Radar Based on a Variational Method:Refinement of Vertical Velocity Estimates

引用

Advances in Atmospheric Sciences 2022年第1期39卷 145-160页

作者： Chenbin XUE Zhiying DING xinyong shen Xian CHEN Key Laboratory of Meteorological Disaster Ministry of Education/Joint International Research Laboratory of Climate and Environment Change/Collaborative Innovation Center on Forecast and Evaluation of Meteorological DisastersNanjing University of Information Science and TechnologyNanjing 210044China Jiangxi Meteorological Observatory Nanchang 330096China Guangdong Province Key Laboratory of Regional Numerical Weather Prediction Institute of Tropical and Marine MeteorologyCMAGuangzhou 510080China Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai) Zhuhai 519082China Jiangxi Institute of Land and Space Survey and Planning/Jiangxi Geomatics Center Nanchang 330000China

In this paper,a scheme of dual-Doppler radar wind analysis based on a three-dimensional variational method is proposed and performed in two ***,the horizontal wind field is simultaneously recovered through minimizing a cost function defined as a radial observation term with the standard conjugate gradient method,avoiding a weighting parameter specification *** with conventional dual-Doppler wind synthesis approaches,this variational method minimizes errors caused by interpolation from radar observation to analysis grid in the iterative solution process,which is one of the main sources of ***,through the accelerated Liebmann method,the vertical velocity is further reestimated as an extra step by solving the Poisson equation with impermeable conditions imposed at the ground and near the *** Poisson equation defined by the second derivative of the vertical velocity is derived from the mass continuity *** with the method proposed by O’Brien,this method is less sensitive to the uncertainty of the boundary conditions and has better stability and ***,the method proposed in this paper is applied to Doppler radar observation of a squall line *** is shown that the retrieved vertical wind profile agrees well with the vertical profile obtained with the velocity–azimuth display(VAD)method,and the retrieved radial velocity as well as the analyzed positive and negative velocity centers and horizontal wind shear of the squall line are in accord with radar *** is a good correspondence between the divergence field of the derived wind field and the vertical ***,the horizontal and vertical circulations within and around the squall line,as well as strong updrafts,the associated downdrafts,and associated rear inflow of the bow echo,are analyzed *** is worth mentioning that the variational method in this paper can be applied to simultaneously synthesize the three-dimensional wind fiel

关键词： dual-Doppler radar three-dimensional wind a variational method vertical velocity wind synthesis

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

On the Mechanism of a Terrain-Influenced Snow Burst Event during Midwinter in Northeast China

引用

Advances in Atmospheric Sciences 2021年第5期38卷 800-816页

作者： Na LI Baofeng JIAO Lingkun RAN xinyong shen Yanbin QI Institute of Atmospheric Physics Chinese Academy of SciencesBeijing 100029China Key Laboratory of Meteorological Disaster Ministry of Education/Joint International Research Laboratory of Climate and Environment Change/Collaborative Innovation Center on Forecast and Evaluation of Meteorological DisastersNanjing University of Information Science and TechnologyNanjing 210044China Jilin Weather Modification Office Changchun 130062China

Short-duration snow bursts with heavy snow represent one type of hazardous weather in winter which can be easily missed by the winter weather warnings but often results in great *** this paper,the mechanism for the occurrence of such events was investigated with the aid of a localized terrain-influenced snow burst event in Northeast *** snow burst was produced by an eastward-moving cold-frontal snowband which encountered the downstream complex terrain of the Changbai Mountains and *** ascertain the role of orography on the snow burst,numerical experiments,together with a parallel sensitivity experiment removing Changbai Mountains,were performed to attempt to distinguish the contributions of cold-frontal system and orographic effects to produce the heavy *** showed that without the influence of Changbai Mountains,the release of conditional instability(CI)and inertial instability(II)within a weak frontogenetical environment was responsible for the snowband *** effects played important roles in enhancing the snowband and increasing the snowfall *** enhancement mechanism was related to the interactions of the cold-frontal snowband and the *** the one hand,orographic frontogenesis and persistent ascent,created by orographic gravity waves over the terrain,greatly enhanced the orographic *** intensification of the lifting promoted the release of CI and thus enhanced the *** the other hand,pre-existing orographic instabilities were released due to the passing of the cold-frontal snowband,which could also serve to intensify the snowband over terrain and thus increase the snowfall.

关键词： terrain-influenced snow burst snowband instability lifting

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Precipitation Responses to Radiative Effects of Ice Clouds:A Cloud-Resolving Modeling Study of a Pre-Summer Torrential Precipitation Event

引用

Advances in Atmospheric Sciences 2016年第10期33卷 1137-1142页

作者： xinyong shen Wenyan HUANG Chunyan GUO Xiaocen JIANG Key Laboratory of Meteorological Disaster Ministry of Education/Joint International Research Laboratory ofClimate and Environment Change/Collaborative Innovation Center on Forecast and Evaluation of Meteorological DisastersNanjing University of Information Science and TechnologyNanjingJiangsu 210044China Changzhou Meteorological Bureau ChangzhouJiangsu 213022China Inner Mongolia Meteorological Service Center HohhotInner Mongolia 010051China

The precipitation responses to the radiative effects of ice clouds are investigated through analysis of five-day and hori- zontally averaged data from 2D cumulus ensemble model experiments of a pre-summer torrential precipitation event. The exclusion of the radiative effects of ice clouds lowered the precipitation rate through a substantial reduction in the decrease of hydrometeors when the radiative effects of water clouds were switched on, whereas it increased the precipitation rate through hydrometeor change from an increase to a decrease when the radiative effects of ice clouds were turned off. The weakened hydrometeor decrease was associated with the enhanced longwave radiative cooling mainly through the decreases in the melt- ing of non-precipitating ice to non-precipitating water. The hydrometeor change from an increase to a decrease corresponded to the strengthened longwave radiative cooling in the upper troposphere through the weakened collection of non-precipitating water by precipitation water.

关键词： hydrometeor change precipitation rate longwave radiative cooling local atmospheric cooling

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Long-term trend of water vapor over the Tibetan Plateau in boreal summer under global warming

引用

Science China Earth Sciences 2022年第4期65卷 662-674页

作者： Jingwen YU Qingquan LI Yihui DING Jie ZHANG Qingyuan WU xinyong shen Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters/Key Laboratory of Meteorological Disaster Ministry of Education/Joint International Research Laboratory on Climate and Environment ChangeNanjing University of Information Science&TechnologyNanjing 210044China Laboratory for Climate Studies National Climate CenterChina Meteorological AdministrationBeijing 100081China Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai) Zhuhai 519082China

In this study,the long-term trend of water vapor over the Tibetan Plateau(TP)in boreal summer is investigated by using observation and reanalysis data from 1979 to *** historical experiment simulations of 19 models that participated in the Coupled Model Intercomparison Project phase 6(CMIP6)are evaluated,and the future variation tendency under four emission scenarios is *** results indicate that the water vapor content and the net water vapor budget over the TP show notable increasing trends,which are mainly manifested by a significant increase in the net water vapor import and a significant decrease in the water vapor export on the eastern boundary of the *** is mainly due to an anomalous anticyclone from Lake Baikal to the Mongolian *** CMIP6 multi-model ensemble can well simulate the variation characteristics of the TP net water vapor *** projection results indicate that by the end of the twenty-first century,the water vapor content,the net water vapor import and precipitation over the TP will *** a high-emissions scenario and compared with the current period(1991–2014),these three variables will increase by 47.99%,59.77%and 18.59%in the long term(2081–2100),*** significant enhancement of meridional water vapor transport over the northern TP may be the main reason for the increase in humidity over the TP.

关键词： Tibetan Plateau Boreal summer Water vapor transport Long-term trend Projection

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Temporal and Spatial Scale Dependence of Precipitation Analysis over the Tropical Deep Convective Regime

引用

Advances in Atmospheric Sciences 2012年第6期29卷 1390-1394页

作者：沈新勇 Key Laboratory of Meteorological Disaster of Ministry of Education Nanjing University of Information Science and Technology

Data from Goddard cumulus ensemble model experiment are used to study temporal and spatial scale dependence of tropical rainfall separation analysis based on cloud budget during Tropical Ocean Global Atmosphere Coupled Ocean Atmosphere Response Experiment （TOGA COARE）. The analysis shows that the calculations of model domain mean or time-mean grid-scale mean simulation data overestimate the rain rates of the two rainfall types associated with net condensation but they severely underestimate the rain rate of the rainfall type associated with net evaporation and hydrometeor convergence.

关键词： cloud microphysical budget temporal and spatial scale rainfall partitioning analysis

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

The Warm Arctic-Cold Eurasia Pattern and Its Key Region in Winter in CMIP6 Model Simulations

引用

Advances in Atmospheric Sciences 2023年第12期40卷 2138-2153,I0002-I0006页

作者： Liang ZHAO Yunwen LIU Yihui DING Qingquan LI Wei DONG xinyong shen Wei CHENG Haoxin YAO Ziniu XIAO State Key Laboratory of Numerical Modeling for Atmosphere Sciences and Geophysical Fluid Dynamics(LASG) Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China Key Laboratory of Meteorological Disaster Ministry of Education/Joint International Research Laboratory of Climate and Environment Change/Collaborative Innovation Center on Forecast and Evaluation of Meteorological DisastersNanjing University of Information Science and TechnologyNanjing 210044China Neijiang Meteorological Bureau Neijiang 641000China China Meteorological Administration National Climate CenterBeijing 100081China Key Laboratory of Geoscience Big Data and Deep Resource of Zhejiang Province School of Earth SciencesZhejiang UniversityHangzhou 310058China Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai) Zhuhai 519082China Beijing Institute of the Applied Meteorology Beijing 100029China

An enhanced Warm Arctic-Cold Eurasia(WACE)pattern has been a notable feature in recent winters of the Northern ***,divergent results between model and observational studies of the WACE still *** study evaluates the performance of 39 climate models participating in the Coupled Model Intercomparison Project Phase 6(CMIP6)in simulating the WACE pattern in winter of 1980-2014 and explores the key factors causing the differences in the simulation capability among the *** results show that the multimodel ensemble(MME)can better simulate the spatial distribution of the WACE pattern than most single *** that can/cannot simulate both the climatology and the standard deviation of the Eurasian winter surface air temperature well,especially the latter,usually can/cannot simulate the WACE pattern *** mainly results from the different abilities of the models to simulate the range and intensity of the warm anomaly in the Barents Sea-Kara seas(BKS)*** analysis shows that a good performance of the models in the BKS area is usually related to their ability to simulate location and persistence of Ural blocking(UB),which can transport heat to the BKS region,causing the warm Arctic,and strengthen the westerly trough downstream,cooling central ***,simulation of UB is key and significantly affects the model’s performance in simulating the WACE.

关键词： warm Arctic-cold Eurasia pattern Arctic amplification CMIP6 simulation evaluation extreme climate blocking highs

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Trigger mechanism of a snow burst event in Northeast China

引用

Atmospheric and Oceanic Science Letters 2021年第2期14卷 13-20页

作者： Baofeng Jiao Lingkun Ran xinyong shen Yanbin Qi Key Laboratory of Meteorological Disaster Ministry of Education/Joint International Research Laboratory of Climate and Environment Change/Collaborative Innovation Center on Forecast and Evaluation of Meteorological DisastersNanjing University of Information Science and TechnologyNanjingChina Institute of Atmospheric Physics Chinese Academy of SciencesBeijingChina Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai) ZhuhaiChina Jilin Weather Modification Office ChangchunChina

A snow burst event characterized by brief heavy snowfall affected Northeast China and caused serious social impact on 26 January 2017,with the snowband generally aligned with a northeast–southwest-oriented cold *** reanalysis data were used to diagnose the possible trigger *** showed there were two stages:(a)an initial stage far away from the Changbai Mountains,and(b)an enhancement stage under the influence of high *** the initial stage,the coupling of low-level frontogenesis and a favorable convergence pattern caused strong upward motion,contributing to the release of *** the snowband approached the high terrain during the enhancement stage,the various instabilities were triggered by the low-level frontogenesis,terrain circulation,and strong wind shear associated with the low-level ***,a modified Q-vector divergence including generalized potential temperature was calculated to diagnose the vertical *** showed that the frontogenesis terms contributed greatly to the negative Q-vector divergence along the moist isentropes,while the pseudo-vorticity terms played a role in the regions with strong wind shear associated with the low-level jet in the warm section,suggesting both were important in stimulating the ascending *** regions with negative Q-vector divergence had a close relationship with the vertical structure of convection,indicating the potential to track the development of the snowband in the next few hours.

关键词： Snow burst Frontogenesis Q-vector

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

两种类型中尺度涡旋Rossby波的相速度及其物理机制

引用

气象科学 2006年第4期26卷 355-364页

作者：沈新勇南京信息工程大学江苏省气象灾害重点实验室南京210044

本文使用正压浅水方程组以及纬向切变基流下二维中尺度横波型扰动的Bouss-inesq近似方程组,分析了这种沿着基本气流方向传播的中尺度扰动的波动传播物理过程。研究结果表明,中尺度涡旋Rossby波划分为两种类型。由于纬向基本气流的方向... 详细信息

本文使用正压浅水方程组以及纬向切变基流下二维中尺度横波型扰动的Bouss-inesq近似方程组,分析了这种沿着基本气流方向传播的中尺度扰动的波动传播物理过程。研究结果表明,中尺度涡旋Rossby波划分为两种类型。由于纬向基本气流的方向的二阶水平切变或者基本气流的垂直涡度在南北方向的变化(β*因子)所导致的涡旋Rossby波称之为第一类涡旋Rossby波(正压涡旋Rossby波),它产生的根本原因是β*因子的作用。这种第一类涡旋Rossby波相对于基本气流-U0是单向传播的,其传播方向则与β*因子的正负符号有关。基本气流在垂直方向上的风速切变对于中尺度横波型的扰动起着不稳定的作用。如果考虑基流的二次垂直切变时,可以得到第二类涡旋Rossby波(斜压涡旋Rossby波)的相速度表达式,第二类涡旋Rossby波产生的物理根源是基本流场的风速-U的二次垂直切变或者基本流场y方向的平均涡度在空间z方向上的不均匀性(亦即β**因子)。第二类涡旋Rossby波相对于基本气流-U0也是单向传播的,其相速度与纬向波数k有关,能量是频散的,在纬向x方向存在群速度。在基本流场的风速-U存在二次垂直切变时,横波型不稳定可能是混合的涡旋Rossby-重力波的不稳定;而当基本流场的风速-U仅仅存在线性切变,不存在二次垂直切变时,此时根本不存在涡旋Rossby波,横波型扰动的不稳定则仅仅是重力惯性波的不稳定。最后利用横波型扰动的总涡度守恒方程对第二类涡旋Rossby波形成的物理机制做出了解释。

关键词：横波不稳定第一类涡旋Rossby波第二类涡旋Rossby波基流二次切变涡度守恒方程

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：