检索结果-南通市图书馆

New Progress and Challenges in Cloud–Aerosol–Radiation–Precipitation Interactions:Preface for a Special Issue※

在线全文

学校读者我要写书评

暂无评论

Advances in Atmospheric Sciences 2022年第12期39卷 1983-1985页

作者： chuanfeng zhao Yuan WANG Husi LETU Department of Atmospheric and Oceanic Sciences School of PhysicsPeking UniversityBeijing 100871China Department of Earth Atmosphericand Planetary SciencesPurdue UniversityWest LafayetteIN 47907USA State Key Laboratory of Remote Sensing Science The Aerospace Information Research InstituteChinese Academy of Sciences(CAS)Beijing 100101China

Clouds play essential roles in the Earth’s radiative energy balance and global hydrological ***,the particles suspended in the air,can change cloud properties by interacting with radiation or serving as cloud condensation ***,the variations in cloud properties subjected to aerosol context,and their impacts on radiation and precipitation,are related to many complicating factors such as land types,meteorological conditions,cloud types,aerosol properties,and their co-varied *** of cloud-aerosol-radiation-precipitation interactions makes representation of clouds one of the largest uncertainties in climate models for future climate *** has also become a prevailing topic in atmospheric sciences over the past several decades.

关键词： Cloud aerosol prevailing

Compensating Errors in Cloud Radiative and Physical Properties over the Southern Ocean in the CMIP6 Climate Models

在线全文

学校读者我要写书评

暂无评论

Advances in Atmospheric Sciences 2022年第12期39卷 2156-2171页

作者： Lijun zhao Yuan WANG chuanfeng zhao Xiquan DONG Yuk L.YUNG Division of Geology and Planetary Science California Institute of TechnologyPasadenaCA 91125USA College of Global Change and Earth System Science Beijing Normal UniversityBeijing 100875China Department of Hydrology and Atmospheric Sciences University of ArizonaTucsonAZ 85710USA Department of Earth Atmosphericand Planetary SciencesPurdue UniversityWest Lafayette 47907USA Department of Atmospheric and Oceanic Sciences School of PhysicsPeking UniversityBeijing 100871China

The Southern Ocean is covered by a large amount of clouds with high cloud ***,as reported by previous climate model intercomparison projects,underestimated cloudiness and overestimated absorption of solar radiation(ASR)over the Southern Ocean lead to substantial biases in climate *** present study revisits this long-standing issue and explores the uncertainty sources in the latest CMIP6 *** employ 10-year satellite observations to evaluate cloud radiative effect(CRE)and cloud physical properties in five CMIP6 models that provide comprehensive output of cloud,radiation,and *** simulated longwave,shortwave,and net CRE at the top of atmosphere in CMIP6 are comparable with the CERES satellite *** cloud fraction(CF)is also reasonably simulated in CMIP6,but the comparison of liquid cloud fraction(LCF)reveals marked biases in spatial pattern and seasonal *** discrepancies between the CMIP6 models and the MODIS satellite observations become even larger in other cloud macroand micro-physical properties,including liquid water path(LWP),cloud optical depth(COD),and cloud effective radius,as well as aerosol optical depth(AOD).However,the large underestimation of both LWP and cloud effective radius(regional means~20%and 11%,respectively)results in relatively smaller bias in COD,and the impacts of the biases in COD and LCF also cancel out with each other,leaving CRE and ASR reasonably predicted in *** error estimation framework is employed,and the different signs of the sensitivity errors and biases from CF and LWP corroborate the notions that there are compensating errors in the modeled shortwave *** correlation analyses of the geospatial patterns reveal that CF is the most relevant factor in determining CRE in observations,while the modeled CRE is too sensitive to LWP and *** relationships between cloud effective radius,LWP,and COD are also analyzed to explore the possible uncertainty sources in dif

关键词： cloud radiative effect cloud physics the Southern Ocean global climate models

Growth Rates of Fine Aerosol Particles at a Site near Beijing in June 2013

在线全文

学校读者我要写书评

暂无评论

Advances in Atmospheric Sciences 2018年第2期35卷 209-217页

作者： chuanfeng zhao Yanan LI Fang ZHANG Yele SUN Pucai WANG State Key Laboratory of Earth Surface Processes and Resource Ecology and College of Global Change and Earth System Science Beijing Normal University Beijing 100875 China Joint Center for Global Change Studies Beijing 100875 China Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100875 China

Growth of fine aerosol particles is investigated during the Aerosol-CCN-Cloud Closure Experiment campaign in June 2013 at an urban site near Beijing. Analyses show a high frequency （- 50%） of fine aerosol particle growth events, and show that the growth rates range from 2.1 to 6.5 nm h-1 with a mean value of - 5.1 nm h-1. A review of previous studies indicates that at least four mechanisms can affect the growth of fine aerosol particles： vapor condensation, intramodal coagulation, extramodal coagulation, and multi-phase chemical reaction. At the initial stage of fine aerosol particle growth, condensational growth usually plays a major role and coagulation efficiency generally increases with particle sizes. An overview of previous studies shows higher growth rates over megacity, urban and boreal forest regions than over rural and oceanic regions. This is most likely due to the higher condensational vapor, which can cause strong condensational growth of fine aerosol particles. Associated with these multiple factors of influence, there are large uncertainties for the aerosol particle growth rates, even at the same location.

关键词： growth rate fine aerosol particle Xianghe

Synthesis of multicore-shell FeS_(2)@C nanocapsules for stable potassiumion batteries

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2022年第10期31卷 126-132,I0004页

作者： Zhuangzhuang Zhang Liping Duan Yifan Xu chuanfeng zhao Jianchun Bao Jian Shen Xiaosi Zhou Jiangsu Key Laboratory of New Power Batteries Jiangsu Collaborative Innovation Center of Biomedical Functional MaterialsSchool of Chemistry and Materials ScienceNanjing Normal UniversityNanjing 210023JiangsuChina

Transition-metal sulfides are widely used as anodes for potassium-ion batteries(PIBs) due to their low cost and high theoretical *** practical application of such materials,however,is still impeded by their inherent low conductivity and obvious volume change during ***,a flexible etchassisted sulfidation strategy is *** to the strategy,the multicore-shell(MCS) nanocapsule structure is constructed,and then mesoporous FeS2 nanoparticles are encapsulated in the hollow carbon shell with adjustable interior *** product,MCS-FeS2@C-20,not only features optimized inner space,but also delivers a large reversible capacity(519 mAh g^(-1) at a current density of 50 mA g^(-1)),good rate capability(107 mAh g^(-1) at a high current density of 5 A g^(-1)) and excellent cycling stability(capacity retention rate of 84.2% over 500 cycles at 0.5 A g^(-1)),making it the promising anode material for ***,potassium-ion full cells(MCS-FeS_(2)@C-20//K_(0.4)CoO_(2)) also show an improved potassium storage performance.

关键词： Potassium-ion battery Anode FeS_(2) Yolk-shell structure Carbon protection

Comparison of the Anthropogenic Emission Inventory for CMIP6 Models with a Country-Level Inventory over China and the Simulations of the Aerosol Properties

在线全文

学校读者我要写书评

暂无评论

Advances in Atmospheric Sciences 2022年第1期39卷 80-96页

作者： Tianyi FAN Xiaohong LIU Chenglai WU Qiang ZHANG chuanfeng zhao Xin YANG Yanglian LI College of Global Change and Earth System Science Beijing Normal UniversityBeijing 100875China Department of Atmospheric Sciences Texas A&M UniversityCollege StationTexas 77843USA International Center for Climate and Environment Sciences Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China Department of Earth System Science Tsinghua UniversityBeijing 100091China

Anthropogenic emission inventory for aerosols and reactive gases is crucial to the estimation of aerosol radiative forcing and climate ***,the anthropogenic emission inventory for AerChemMIP,endorsed by CMIP6,is briefly *** CMIP6 inventory is compared with a country-level inventory(i.e.,MEIC)over China from 1986 to *** are found in the yearly trends of the two inventories,especially after *** yearly trends of the aerosol burdens simulated by CESM2 using the two inventories follow their emission trends and deviate after the mid-2000s,while the simulated aerosol optical depths(AODs)show similar *** difference between the simulated AODs is much smaller than the difference between model and *** the simulated AODs agree with the MODIS satellite retrievals for country-wide average,the good agreement is an offset between the underestimation in eastern China and the overestimation in western ***-biased precursor gas of SO_(2),overly strong convergence of the wind field,overly strong dilution and transport by summer monsoon circulation,too much wet scavenging by precipitation,and overly weak aerosol swelling due to low-biased relative humidity are suggested to be responsible for the underestimated AOD in eastern *** indicates that the influence of the emission inventory uncertainties on simulated aerosol properties can be overwhelmed by model biases of meteorology and aerosol *** is necessary for climate models to perform reasonably well in the dynamical,physical,and chemical processes that would influence aerosol simulations.

关键词： anthropogenic emission inventory AerChemMIP CMIP6 MEIC aerosol CESM2

Understanding Third Pole Atmospheric Dynamics and Land Surface Processes and Their Associations with the Cryosphere,Air Quality,and Climate Change--Preface to the Special Issue on Third Pole Atmospheric Physics,Chemistry,and Hydrology

在线全文

学校读者我要写书评

暂无评论

Advances in Atmospheric Sciences 2022年第7期39卷 1017-1020页

作者： Yun Qian Hailong Wang chuanfeng zhao Chun zhao Siyu Chen Xiao-Ming Hu Shichang Kang Pacific Northwest National Laboratory RichlandWA 99354USA College of Global Change and Earth System Science Beijing Normal UniversityBeijing 100875China School of Earth and Space Sciences University of Science and Technology of ChinaHefei 230026China College of Atmospheric Sciences Lanzhou UniversityLanzhou 730000China Center for Analysis and Prediction of Storms University of OklahomaNorman 73019OKUSA State Key Laboratory of Cryospheric Science Northwest Institute of Eco-Environment and ResourcesChinese Academy of Sciences(CAS)Lanzhou 730000China

The Tibetan Plateau(TP),widely known as the Third Pole,is the highest and largest plateau on *** TP not only plays an important role in influencing the atmospheric circulation,surface energy budget,ecology,weather,and climate but also acts as the Asian Water Tower by holding the largest ice mass outside the polar regions to supply fresh water to over 1.4 billion people downstream in Asia(Qin et al.,2006).The observed historical warming and projected future warming over the TP are much stronger than the corresponding global average(Wang et al.,2008).Glaciers on the TP have been retreating extensively in recent decades,driven by atmospheric warming and circulation changes associated with increasing concentrations of greenhouse gases and aerosols in the atmosphere,light-absorbing particles(e.g.,black carbon,dust)on snow,and other factors(Duan et al.,2012;Qian et al.,2011;zhao et al.,2020).In addition,due to the thermal and dynam-ical effects of the TP,as well as its proximity to the stratosphere,unique atmospheric boundary layer structures often develop over the TP and in the surrounding areas,which have important impacts on local weather,climate,and mixing and transport of atmospheric constituents(zhao et al.,2020).The TP is considered a natural laboratory to study multi-sphere inter-actions.A systematic mechanistic understanding of the atmospheric chemical and microphysical processes,climate change,cryospheric variability,and the subsequent environmental impacts is particularly important in the context of the unpreceden-ted warming over the TP(Yao et al.,2019).

关键词： warming weather plateau

Macro-and Micro-physical Characteristics of Different Parts of Mixed Convective-stratiform Clouds and Differences in Their Responses to Seeding

在线全文

学校读者我要写书评

暂无评论

Advances in Atmospheric Sciences 2022年第12期39卷 2040-2055页

作者： Dejun LI chuanfeng zhao Peiren LI Cao Liu Dianli GONG Siyao LIU Zhengteng YUAN Yingying CHEN Hubei Meteorological Service Center Wuhan 430205China College of Global Change and Earth System Science Beijing Normal UniversityBeijing 100875China Weather Modification Office of Shanxi Province Taiyuan 030032China Wuhan Central Meteorological Observatory Wuhan 430074China Weather Modification Office of Shandong Province Jinan 250031China

This study investigates the cloud macro-and micro-physical characteristics in the convective and stratiform regions and their different responses to the seeding for mixed convective-stratiform clouds that occurred in Shandong province on 21 May 2018,based on the observations from the aircraft,the Suomi National Polar-Orbiting Partnership(NPP)satellite,and the high-resolution Himawari-8(H8)*** aircraft observations show that convection was deeper and radar echoes were significantly enhanced with higher tops in response to seeding in the convective *** is linked with the conversion of supercooled liquid droplets to ice crystals with released latent heat,resulting in strengthened updrafts,enhanced radar echoes,higher cloud tops,and more and larger precipitation *** contrast,in the stratiform cloud region,after the Silver Iodide(AgI)seeding,the radar echoes become significantly weaker at heights close to the seeding layer,with the echo tops lowered by 1.4–1.7 *** addition,a hollow structure appears at the height of 6.2–7.8 km with a depth of about 1.6 km and a diameter of about 5.5 km,and features such as icing seeding tracks *** suggest that the transformation between droplets and ice particles was accelerated by the seeding in the stratiform *** NPP and H8 satellites also show that convective activity was stronger in the convective region after seeding;while in the stratiform region,a cloud seeding track with a width of 1–3 km appears 10 km downstream of the seeding layer 15 minutes after the AgI seeding,which moves along the wind direction as width increases.

关键词： airborne Ka-band Precipitation Radar(KPR) mixed convective-stratiform clouds convective region stratiform region cloud seeding cloud microphysical properties

Aerosol characteristics and impacts on weather and climate over the Tibetan Plateau

在线全文

学校读者我要写书评

暂无评论

National Science Review 2020年第3期7卷 492-495页

作者： chuanfeng zhao Yikun Yang Hao Fan Jianping Huang Yunfei Fu Xiaoye Zhang Shichang Kang Zhiyuan Cong Husi Letu Massimo Menenti State Key Laboratory of Earth Surface Processes and Resource Ecology and College of Global Change and Earth System Science Beijing Normal University Collaborative Innovation Center for Western Ecological Safety College of Atmospheric Sciences Lanzhou University School of Earth and Space Sciences University of Science and Technology of China Institute of Atmospheric Composition Chinese Academy of Meteorological Sciences State Key Laboratory of Cryospheric Sciences Northwest Institute of Eco-Environment and Resources Chinese Academy of Sciences Institute of Remote Sensing and Digital Earth Chinese Academy of Sciences

With the most massive snow and ice globally between 60°S and 60°N, the Tibetan Plateau (TP), also called the third pole of the world, plays significant roles in the weather, climate and lives in South Asia and East Asia and even the world [1–3].Investigating the variation of weather and the climate system over the TP has long been carried out, which is signif-

关键词： Aerosol characteristics and impacts on weather and climate over the Tibetan Plateau

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

臭氧卫星遥感反演进展及挑战

光学学报 2023年第18期43卷 64-81页

作者：迟雨蕾赵传峰北京师范大学全球变化与地球系统科学研究院北京100875 北京大学物理学院大气与海洋科学系北京100871

臭氧是大气中重要的痕量气体,可影响对流层与平流层大气状态和过程。约90%的臭氧集中在平流层,可吸收下行紫外太阳辐射,保护地球生命系统;约10%的臭氧位于对流层,其空间分布多受局地生成和跨区域输送的影响。目前,臭氧已逐渐成为我国甚... 详细信息

臭氧是大气中重要的痕量气体,可影响对流层与平流层大气状态和过程。约90%的臭氧集中在平流层,可吸收下行紫外太阳辐射,保护地球生命系统;约10%的臭氧位于对流层,其空间分布多受局地生成和跨区域输送的影响。目前,臭氧已逐渐成为我国甚至全球首要污染物,臭氧污染防治也相应地成为我国未来大气污染防治的重点。本文回顾了卫星遥感臭氧的发展进程,包括臭氧卫星探测传感器、反演算法和应用进展,并着重分析了臭氧污染相关内容,包括臭氧污染时空特征分析、典型污染事件分析、臭氧污染与气象条件相互作用等。多种卫星探测载荷的仪器设计和反演技术的不断发展,使得卫星遥感臭氧反演和监测应用成为可能。卫星可通过紫外谱段和红外谱段而获取臭氧整层信息和垂直分布信息,目前臭氧柱总量监测精度较高,但对流层下层和近地面臭氧浓度反演精度还有待提高。根据现阶段的技术水平,可采用多种技术方法相结合来提升中低层臭氧的探测能力。臭氧污染的监管和防控需要摸清来源,准确评估污染的成因,可从前体物排放、化学转化、气象影响、三维传输等方面逐步进行解析。此外,氮氧化物(NO_(x))和挥发性有机物(VOC_(s))的协同减排是我国臭氧治理的根本所在,也是下一步的重点研究方向。

关键词：大气光学臭氧卫星遥感反演算法精度验证空气质量平流层侵入