检索结果-南通市图书馆

Impact of Sky Conditions on Net Ecosystem Productivity over a “Floating Blanket” Wetland in Southwest China

在线全文

学校读者我要写书评

暂无评论

Advances in Atmospheric Sciences 2024年第2期41卷 355-368页

作者： Yamei SHAO Huizhi LIU Qun DU Yang LIU Jihua SUN Yaohui LI Jinlian LI State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China University of Chinese Academy of Sciences Beijing 100029China Yunnan meteorological Observatory Kunming 530100China College of Aviation Meteorology Civil Aviation Flight University of ChinaGuanghan 618307China meteorological bureau of Tengchong County Baoshan 679100China

Based on eddy covariance(EC) measurements during 2016–20, the effects of sky conditions on the net ecosystem productivity(NEP) over a subtropical “floating blanket ” wetland were investigated. Sky conditions were divided into overcast, cloudy, and sunny conditions. On the half-hourly timescale, the daytime NEP responded more rapidly to the changes in the total photosynthetic active radiation(PARt) under overcast and cloudy skies than that under sunny skies. The increase in the apparent quantum yield under overcast and cloudy conditions was the greatest in spring and the least in summer. Additionally, lower atmospheric vapor pressure deficit(VPD) and moderate air temperature were more conducive to enhancing the apparent quantum yield under cloudy skies. On the daily timescale, NEP and the gross primary production(GPP) were higher under cloudy or sunny conditions than those under overcast conditions across seasons. The daily NEP and GPP during the wet season peaked under cloudy skies. The daily ecosystem light use efficiency(LUE) and water use efficiency(WUE) during the wet season also changed with sky conditions and reached their maximum under overcast and cloudy skies, respectively. The diffuse photosynthetic active radiation(PAR_d) and air temperature were primarily responsible for the variation of daily NEP from half-hourly to monthly timescales, and the direct photosynthetic active radiation(PAR_b) had a secondary effect on NEP. Under sunny conditions, PAR_b and air temperature were the dominant factors controlling daily NEP. While daily NEP was mainly controlled by PAR_d under cloudy and overcast conditions.

关键词： diffuse radiation eddy covariance NEP controlling factors wetland path analysis

Synergistic Impacts of Indian Ocean SST and Indo-China Peninsula Soil Moisture on the 2020 Record-breaking Mei-yu

在线全文

学校读者我要写书评

暂无评论

Advances in Atmospheric Sciences 2024年第9期41卷 1735-1750页

作者： Yinshuo DONG Haishan CHEN Xuan DONG Wenjian HUA Wenjun ZHANG 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 School of Atmospheric Sciences Nanjing University of Information Science and TechnologyNanjing 210044China bureau of Hydrology ChangJiang Water Resources CommissionWuhan 430010China

The Yangtze River basin(YRB)experienced a record-breaking mei-yu season in June‒July *** unique long-lasting extreme event and its origin have attracted considerable *** studies have suggested that the Indian Ocean(IO)SST forcing and soil moisture anomaly over the Indochina Peninsula(ICP)were responsible for this unexpected ***,the relative contributions of IO SST and ICP soil moisture to the 2020 mei-yu rainfall event,especially their linkage with atmospheric circulation changes,remain *** using observations and numerical simulations,this study examines the synergistic impacts of IO SST and ICP soil moisture on the extreme mei-yu in *** show that the prolonged dry soil moisture led to a warmer surface over the ICP in May under strong IO SST *** intensification of the warm condition further magnified the land thermal effects,which in turn facilitated the westward extension of the western North Pacific subtropical high(WNPSH)in June‒*** intensified WNPSH amplified the water vapor convergence and ascending motion over the YRB,thereby contributing to the 2020 *** contrast,the land thermal anomalies diminish during normal IO SST backgrounds due to the limited persistence of soil *** roles of IO SST and ICP soil moisture are verified and quantified using the Community Earth System *** synergistic impacts yield a notable 32%increase in YRB *** findings provide evidence for the combined influences of IO SST forcing and ICP soil moisture variability on the occurrence of the 2020 super mei-yu.

关键词： super mei-yu Indian Ocean SST soil moisture Indochina Peninsula

Characteristics of Dry and Wet Climate in Shandong Province Based on Standardized Precipitation Index

在线全文

学校读者我要写书评

暂无评论

meteorological and Environmental Research 2024年第3期15卷 6-15页

作者： Ningxin ZHANG Fengling ZENG Fang LI Key Laboratory of meteorological Disaster Prevention and Mitigation of Shandong Province Jinan 250031China Qufu meteorological bureau Jining 273199China Chongqing Branch Southwest Air Traffic Management BureauCivil Aviation Administration of ChinaChongqing 401120China Jining meteorological bureau Jining 272000China

Based on the monthly precipitation data of 116 meteorological stations in Shandong Province during 1970-2021,standardized precipitation index(SPI)was calculated,and the methods of linear fitting,mutation test and Morlet wavelet analysis were used to analyze the change trend and temporal and spatial distribution characteristics of SPI index in the past 52 *** results show that there were more normal years in Shandong Province,and the frequency reached 38.46%.There was severe drought in the 1980s and more wet years after *** index showed an upward trend in spring,summer and winter but a weak arid trend in *** addition,intense dry weather was more frequent in ***,the climate was normal or humid in most areas of Shandong *** regions with more wet years were located in the central and northeast Shandong and the peninsula,while the climate was normal in the southwest and north of *** areas with more dry years were mainly located in the northwest of Shandong *** was mainly local and global drought in Shandong Province,and the arid area showed a decreasing *** the past 52 years,Shandong Province experienced quasi-4 times of alternation between dry and wet *** long period of 21 a was the first main period,and the climate would be still wet in Shandong Province in the *** terms of mutation,the climate in Shandong Province became humid after 2003,and 2003 was the mutation *** the abrupt change,the climate changed from gradually drying to wetting.

关键词： Standardized precipitation index Shandong Province Dry and wet climate characteristics Trend analysis

Understanding the factors influencing cloud-core vertical accelerations during deep convection formation in the WRF model

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

Atmospheric and Oceanic Science Letters 2024年第3期17卷 1-7页

作者： Na Li Jin Wang Lingkun Ran Lei Yin Xiba Tang Yuchen Liu Institute of Atmospheric Physics Chinese Academy of SciencesBeijingChina Guizhou meteorological bureau GuiyangChina University of Chinese Academy of Sciences BeijingChina Nanjing University of Posts and Telecommunications NanjingChina Yunnan Key Laboratory of meteorological Disasters and Climate Resources in the Great Mekong Subregion Yunnan UniversityKunmingChina

本文将扰动气压利用一个线性诊断关系代替,重新推导了WRF模式框架地形追随坐标系下的垂直动量方程,建立了垂直加速与对流触发(DCI)影响因子(如温度,水汽等)的直接联系.研究发现,DCI过程与对流核垂直加速相关,三维副散,扰动位势在垂直方... 详细信息

本文将扰动气压利用一个线性诊断关系代替,重新推导了WRF模式框架地形追随坐标系下的垂直动量方程,建立了垂直加速与对流触发(DCI)影响因子(如温度,水汽等)的直接联系.研究发现,DCI过程与对流核垂直加速相关,三维副散,扰动位势在垂直方向的二阶非均匀性,扰动位温垂直梯度,比湿及其垂直梯度,水凝物拖曳,均是能够直接影响垂直加速和对流触发的物理因子,这些量与模式基本预报量相关,通过解析基本预报量对对流发展的直接影响,可能有助于理解模式对DCI过程预测失败的原因.

关键词：垂直加速深对流垂直速度冰雹

Evaluating CMIP6 models in simulating the North Pacific decadal variability in sea surface salinity

在线全文

学校读者我要写书评

暂无评论

Science China Earth Sciences 2024年第8期67卷 2661-2680页

作者： Jian CHEN Hailong LIU Pengfei LIN Wenrong BAI Chengzu BAI Lu WANG Institute of Atmospheric Physics Chinese Academy of SciencesBeijing 100029China State Key Laboratory of Geo-Information Engineering Xi’an 710054China Beijing Municipal Climate Center Beijing Meteorological BureauBeijing 100089China Space System Department Equipment Department Beijing 100096China

The North Pacific sea surface salinity(SSS)decadal variability(NPSDV)and its potential forcing were evaluated from 25 coupled models of the Coupled Model Intercomparison Project phase 6(CMIP6)considering the prospects for decadal climate *** results indicated that the CMIP6 models generally reproduced the spatial patterns of *** large standard deviation of the SSS anomaly over the strong current regions,such as the Kuroshio-Oyashio Extension(KOE),North Pacific Current(NPC),California Current System(CCS),and Alaskan Coastal Current(ACC),is reflected in the two leading modes of NPSDV:a dipole with out-of-phase loadings in the KOE-NPC versus CCS-ACC and a monopole with positive loading over the *** order of modes is sensitive to individual models that exhibit discrepancies,especially in temporal phases and power *** autoregressive model of order-1 was used to reconstruct the NPSDV with several forcing *** generally weaker influence of forcings in an autoregressive model of order-1 is partly related to the overestimated response time of NPSDV relative to *** NPSDV variances originate from the persistence of SSS anomalies,but the dominant forcing factors are diverse among *** model diversity for the NPSDV simulation mainly arises from the influence of the tropical El Ni?o-Southern Oscillation through teleconnection on the North Pacific Oscillation or Aleutian Low with timescale ***,models that can reproduce the NPSDV well are not dependent on those with larger impacts from the North Pacific oceanic processes.

关键词： North Pacific Sea surface salinity Decadal variability CMIP6 Leading mode

同方期刊数据库

Local Torrential Rainfall Event within a Mei-Yu Season Mesoscale Convective System:Importance of Back-Building Processes

在线全文

学校读者我要写书评

暂无评论

Advances in Atmospheric Sciences 2024年第5期41卷 847-863页

作者： Honglei ZHANG Ming XUE Hangfeng SHEN Xiaofan LI Guoqing ZHAI Zhejiang Institute of meteorological Sciences Hangzhou 310017China Center for Analysis and Prediction of Storms and School of MeteorologyUniversity of OklahomaNormanOklahoma 73072USA Department of Atmospheric Science School of Earth SciencesZhejiang UniversityHangzhou 310027China Hangzhou Weather bureau Hangzhou 310007China

An extreme rainfall event occurred over Hangzhou,China,during the afternoon hours on 24 June *** event occurred under suitable synoptic conditions and the maximum 4-h cumulative rainfall amount was over 150 *** rainfall event had two major *** was caused by a quasi-stationary convective line,and the other by a backbuilding convective line related to the interaction of the outflow boundary from the first rainband and an existing low-level mesoscale convergence line associated with a mei-yu frontal *** rainfall event lasted 4 h,while the back-building process occurred in 2 h when the extreme rainfall center *** far,few studies have examined the back-building processes in the mei-yu season that are caused by the interaction of a mesoscale convergence line and a convective cold *** two rainbands are successfully reproduced by the Weather Research and Forecasting(WRF)model with fourlevel,two-way interactive *** the model,new cells repeatedly occur at the west side of older cells,and the backbuilding process occurs in an environment with large CAPE,a low LFC,and plenty of water *** from older cells enhance the low-level convergence that forces new *** precipitation efficiency of the back-building training cells leads to accumulated precipitation of over 150 *** experiments without evaporation of rainwater show that the convective cold pool plays an important role in the organization of the back-building process in the current extreme precipitation case.

关键词： torrential rainfall back-building processes numerical simulation trigger mechanism convergence line convective cold pool

Decadal prediction skill for Eurasian surface air temperature in CMIP6 models

在线全文

学校读者我要写书评

暂无评论

Atmospheric and Oceanic Science Letters 2024年第1期17卷 9-13页

作者： Yanyan Huang Ni Huang Qianfei Zhao Collaborative Innovation Center on Forecast and Evaluation of meteorological Disasters Nanjing University of Information Science&TechnologyNanjingChina Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai) ZhuhaiChina Nansen–Zhu International Research Centre Institute of Atmospheric PhysicsChinese Academy of SciencesBeijingChina Dalian meteorological bureau of Liaoning Province DalianChina

评估CMIP6年代际预测试验对季节平均SAT的预测技巧的结果表明:模式不能有效预测冬季和秋季SAT的年代际变率.IPSL-CM6A-LR和多模式集合平均对于春季SAT展现了预测技巧,其中对于变率的预测技巧好于振幅的结果.基于蒙古和我国华北地区的显... 详细信息

评估CMIP6年代际预测试验对季节平均SAT的预测技巧的结果表明:模式不能有效预测冬季和秋季SAT的年代际变率.IPSL-CM6A-LR和多模式集合平均对于春季SAT展现了预测技巧,其中对于变率的预测技巧好于振幅的结果.基于蒙古和我国华北地区的显著预测技巧,模式对于夏季SAT表现出最佳的预测水平.与外部强迫相比,模式对于SAT的预测技巧可能来自初始化.模式中的一个明显系统性误差值得注意,即模式中冬季SAT的变率可以持续到其他季节,而在观测中其他季节的SAT变化与冬季SAT相对独立.

关键词：欧亚地表温度年代际预测 CMIP6 DCPP

Analysis of Characteristics of a Heavy Rainstorm Process in Nanchang City on July 7,2020

在线全文

学校读者我要写书评

暂无评论

meteorological and Environmental Research 2024年第1期15卷 1-7,11页

作者： Fengling ZENG Landi ZHONG Minghua MENG Chongqing Branch Southwest Air Traffic Management BureauCivil Aviation Administration of ChinaChongqing 401120China Nanchang meteorological bureau Nanchang 330038China

Based on the conventional observation data,dual polarization radar data and NCEP reanalysis data,the large-scale circulation background field,mesoscale conditions and formation causes of a heavy rainstorm in Nanchang on July 7,2020 were *** was found that this heavy rainstorm occurred under the weather background of the confrontation between the northward air flow behind the trough and the strong southwest warm and humid air flow to the northwest of the subtropical *** divergence at the upper level,the shear in the middle and low levels,the southward movement of cold air at the low level,unusually abundant water vapor and high unstable energy caused the heavy rainstorm *** this process,under the influence of continuous eastward movement of several strong echo cells,an obvious"train effect"was formed in Nanchang,so that the local rainfall was continuous and ***,the average of VIL was about 17 kg/m 2,and its variation characteristics were consistent with the variation trend of 5-min rainfall intensity,which had a certain indicator effect on short-term heavy *** topography of the Meiling Mountain in the west of Nanchang had a great influence on the formation and precipitation distribution of the heavy rain *** was a strong rainstorm center near the mountain,and the precipitation was obviously larger than that in the plain area.

关键词： Short-term heavy precipitation Mesoscale system Train effect Meiling landform

Avian influenza and gut microbiome in poultry and humans:A“One Health”perspective

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

Fundamental Research 2024年第3期4卷 455-462页

作者： Ling Zhang Erkai Zhou Ce Liu Xiaoyu Tian Baode Xue Kai Zhang Bin Luo Institute of Occupational Health and Environmental Health School of Public HealthLanzhou UniversityLanzhouGansu 730000China Department of Environmental Health Sciences School of Public HealthUniversity at AlbanyState University of New YorkRensselaerNY 12144USA Shanghai Key Laboratory of Meteorology and Health Shanghai Meteorological BureauShanghai 200030China Shanghai Typhoon Institute China Meteorological AdministrationShanghai 200030China

A gradual increase in avian influenza outbreaks has been found in recent *** is highly possible to trigger the next human pandemic due to the characteristics of antigenic drift and antigenic shift in avian influenza virus(AIV).Although great improvements in understanding influenza viruses and the associated diseases have been unraveled,our knowledge of how these viruses impact the gut microbiome of both poultry and humans,as well as the underlying mechanisms,is still ***“One Health”approach shows better vitality in monitoring and mitigating the risk of avian influenza,which requires a multi-sectoral effort and highlights the interconnection of human health with environmental sustainability and animal ***,monitoring the gut microbiome may serve as a sentinel for protecting the common health of the environment,animals,and *** review summarizes the interactions between AIV infection and the gut microbiome of poultry and humans and their potential *** the presented suggestions,we hope to address the current major challenges in the surveillance and prevention of microbiome-related avian influenza with the“One Health”approach.

关键词： Avian influenza AIV Poultry Gutmicrobiome One Health Poultry-Environment-Human Interface