检索结果-南通市图书馆

Cloud Radiative feedbacks during the ENSO Cycle Simulated by CAMS-CSM

Journal of Meteorological Research 2019年第4期33卷 666-677页

作者： Lin CHEN Lijuan HUA Xinyao RONG Jian LI Lu WANG Guo ZHANG Ming SUN Zi'an GE Key Laboratory of Meteorological Disaster Ministry of Education/Joint International Research Laboratory of Climate and Environmental Change/Collaborative Innovation Center on Forecast and Evaluation of Meteorological DisastersNanjing University of Information Science&Technology(NUIST)Nanjing 210044 State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029 State Key Laboratory of Loess and Quaternary Geology Institute of Earth EnvironmentChinese Academy of SciencesXi'an 710061 State Key Laboratory of Severe Weather Chinese Academy of Meteorological SciencesChina Meteorological AdministrationBeijing 100081

This study evaluated the simulated cloud radiative feedbacks(CRF)during the El Ni?o–Southern Oscillation(ENSO)cycle in the latest version of the Chinese Academy of Meteorological Sciences climate system model(CAMS-CSM).We conducted two experimental model simulations:the Atmospheric Model Intercomparison Project(AMIP),forced by the observed sea surface temperature(SST);and the preindustrial control(PIcontrol),a coupled run without flux *** found that both the experiments generally reproduced the observed features of the shortwave and longwave cloud radiative forcing(SWCRF and LWCRF)*** AMIP run exhibited better simulation performance in the magnitude and spatial distribution than the PIcontrol ***,the simulation biases in SWCRF and LWCRF feedbacks were linked to the biases in the representation of the corresponding total cloud cover and precipitation *** is interesting to further find that the simulation bias originating in the atmospheric component was amplified in the PIcontrol run,indicating that the coupling aggravated the simulation *** the PIcontrol run exhibited an apparent mean SST cold bias over the cold tongue,the precipitation response to the SST anomaly(SSTA)changes during the ENSO cycle occurred towards the relatively warmer western equatorial ***,the corresponding cloud cover and CRF shifted westward and showed a weaker magnitude in the PIcontrol run versus observational *** contrast,the AMIP run was forced by the observational SST,hence representing a more realistic *** results demonstrate the challenges of simulating CRF in coupled *** study also underscores the necessity of realistically representing the climatological mean state when simulating CRF during the ENSO cycle.

关键词： ENSO CAMS climate system model cloud radiative feedbacks ENSO cycle

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

Climate sensitivities of two versions of FGOALS model to idealized radiative forcing

引用

Science China Earth Sciences 2014年第6期57卷 1363-1373页

作者： CHEN XiaoLong ZHOU TianJun GUO Zhun The National Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics Institute of Atmospheric Physics Chinese Academy of Sciences College of Earth Science University of Chinese Academy of Sciences Climate Change Research Center Chinese Academy of Sciences

Projections of future climate change by climate system models depend on the sensitivities of models to specified greenhouse *** reveal and understand the different climate sensitivities of two versions of LASG/IAP climate system model FGOALS-g2 and FGOALS-s2,we investigate the global mean surface air temperature responses to idealized CO2 forcing by using the output of abruptly quadrupling CO2 *** Gregory-style regression method is used to estimate the"radiative forcing"of quadrupled CO2 and equilibrium *** model response is separated into a fast-response stage associated with the CO2 forcing during the first 20 years,and a slow-response stage post the first 20 *** results show that the radiative forcing of CO2 is overestimated due to the positive water-vapor feedback and underestimated due to the fast cloud *** rapid response of water vapor in FGOALS-s2 is responsible for the stronger radiative forcing of *** climate sensitivity,defined as the equilibrium temperature change under doubled CO2 forcing,is about 3.7 K in FGOALS-g2 and4.5 K in *** larger sensitivity of FGOALS-s2 is due mainly to the weaker negative longwave clear-sky feedback and stronger positive shortwave clear-sky feedback at the fast-response stage,because of the more rapid response of water vapor increase and sea-ice decrease in FGOALS-s2 than in *** the slow-response stage,similar to the fast-response stage,net negative clear-sky feedback is weaker in ***,the total negative feedback is larger in FGOALS-s2 due to a larger negative shortwave cloud feedback that involves a larger response of total cloud fraction and condensed water path *** uncertainties of estimated forcing and net feedback mainly come from the shortwave cloud processes.

关键词： climate sensitivity climate response feedbacks FGOALS CMIP5

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

Practical stabilization of a class of uncertain time-varying nonlinear delay systems

引用

控制理论与应用（英文版） 2009年第2期7卷 175-180页

作者： Bassem Ben HAMED Mohamed Ali HAMMAMI Institut Supérieur des Sciences Appliquées et de Technologie de Gabès Département de MathématiquesRue Amor Ben El Khatab 6029 GabèsTunisia Faculté des Sciences de Sfax Département de Mathématiques BP 802 Route Soukra km 4 Sfax 3018Tunisia

In this paper we deal with a class of uncertain time-varying nonlinear systems with a state delay. Under some assumptions, we construct some stabilizing continuous feedback, i.e. linear and nonlinear in the state, which can guarantee global uniform exponential stability and global uniform practical convergence of the considered system. The quadratic Lyapunov function for the nominal stable system is used as a Lyapunov candidate function for the global system. The results developed in this note are applicable to a class of dynamical systems with uncertain time-delay. Our result is illustrated by a numerical example.

关键词： Nonlinear system Time-delay feedbacks Practical convergence Lyapunov function

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

Sustainable Development of Energy Systems and Climate Systems:Key Issues and Perspectives

引用

Energy Engineering 2023年第8期120卷 1763-1773页

作者： Bing Wang Lu Li Xinru Jiang Center for Sustainable Development and Energy Policy Research(SDEP) School of Energy and Mining EngineeringChina University of Mining and Technology(Beijing)Beijing100083China Beijing Key Laboratory for Precise Mining of Intergrown Energy and Resources China University of Mining and Technology(Beijing)Beijing100083China

Climate change and energy security issues are prominent challenges in current energy system management,which should be governed synergistically due to the feedback relationships between ***“Energy Systems Management and Climate Change”Special Collection Issue in the journal of Energy Engineering provide insights into the field of energy systems management and climate *** an extended perspective,this study discusses the key issues,research methods and models for energy system management and climate change *** and accurate prediction of energy supply and demand,the evaluation on the energy system resilience to climate change and the coupling methodology application of both nature and social science field maybe the frontier topics around achieving sustainable development goals of energy systems.

关键词： Energy system management climate change renewable energy feedbacks

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

Time-Fractal in Living Objects

引用

Open Journal of Biophysics 2022年第1期12卷 1-26页

作者： Andras Szasz Department of Biotechnics Szent Istvan University Buda&ouml rs Hungary

Homeostasis creates self-organized synchrony of the body’s reactions, and despite the energetically open system with intensive external and internal interactions, it is robustly stable. Importantly the self-organized system has scaling behaviors in its allometry, internal structures, and dynamic processes. The system works stochastically. Deterministic reductionism has validity only by the great average of the probabilistic processes. The system’s dynamics have a characteristic distribution of signals, which may be characterized by their frequency distribution, creating a particular “noise” 1/f of the power density. The stochastic processes produce resonances pumped by various noise spectra. The chemical processes are mostly driven by enzymatic processes, which also have noise-dependent resonant optimizing. The resonance frequencies are as many as many enzymatic reactions exist in the target.

关键词： Homeostasis Self-Organizing feedbacks Complexity Resonance Stochastic Processes 1/f Noise Dissipation Enzymatic Reactions

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

英语会话中的反馈语

英语会话中的反馈语

引用

作者：刘静浙江大学

学位级别：硕士

The role of two adults in everyday conversation consists of speaker and listener taking turns. One of the frequently -occurring phenomena in conversation is feedbacks. They are a hearer's brief responses to the current speaker's speech in a conversation. However, as one of the most common phenomena in conversations, feedbacks are usually not the focus of attention during conversations. They become noticeable only when they are either absent or too ubiquitous. Although some aspects of feedbacks have been examined by some studies, there has been no attempt to integrate the *** thesis studies feedbacks based on a 12-million-word subcorpus from the British National Corpus (BNC) of Spoken English. With the help of Sara (SGML Aware Retrieval Application), feedbacks are analyzed in terms of forms, positions, functions and sociolinguistic variation (power and context).From the study, we can see that feedbacks sometimes appear in the form of single word, but in most occasions, they appear in the form of more than one-word. If the feedbacks take the form of single-word, usually, they are fulfilling their transactional aims. They can perform the functions of contact, understanding, approval, appraisement/evaluation, acknowledgement, confirmation/ clarification and concession. While when they take the form of more than one word, they not only serve their transactional aims, but also serve their interaction aims. feedbacks occur in two places based on the data from BNC. One is the non-natural pause of the speaker's utterance (which we call overlap feedbacks);the other is the natural pause of the speaker's utterance (which we call In-between feedbacks). When feedbacks occur in the non-natural pause of the speaker's utterance, it means speakers have encountered some difficulties in their utterances. So listeners utter feedbacks not only to show they are listening, but also to encourage speakers to go on their utterance. When feedbacks occur in the natural pause, it just

关键词： feedbacks transactional aim interaction aim forms of feedbacks positions of feedbacks functions of feedbacks sociolinguistic variations and feedbacks in classroom

来源：

同方学位论文库评论

在线全文

同方学位论文库

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

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

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：