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Diagnosing the Dynamic and Thermodynamic Effects for the Exceptional 2020 Summer Rainy Season in the Yangtze River Valley

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Journal of Meteorological Research 2022年第1期36卷 26-36页

作者： Na WEN Shujie liU laurent Z.X.li College of Atmospheric Sciences Nanjing University of Information Science&TechnologyNanjing 210044China Key Laboratory of Meteorological Disaster of Ministry of Education Nanjing University of Information Science&TechnologyNanjing 210044China Qingdao Engineering Technology Research Center for Meteorological Disaster Prevention Qingdao Meteorological BureauQingdao 266003China Laboratoire de Météorologie Dynamique Centre National de la Recherche ScientifiqueSorbonne UniversitéEcole Normale SupérieureEcole PolytechniqueParis 75252France

An exceptional rainy season occurred in the Yangtze River valley of eastern China in June-July *** relative importance of the dynamic and thermodynamic effects on this unusual event is evaluated through the budget equations of moisture and moist static energy(MSE).The moisture budget analysis suggests that the thermodynamic effect contributes to the precipitation anomaly by 8.5%through the advection of abnormal water vapor by mean vertical motion,while the dynamic effect,related to water vapor advection by anomalous vertical motion,has the dominant *** MSE budget analysis further reveals that the anomalous vertical motion is both constrained by the dynamic effect related to changes in atmospheric circulation and the thermodynamic effect related to changes of the atmospheric thermal state,with a ratio of thermodynamic versus total effects estimated at 45.3%.The dynamic effect is linked to the advection of warm and humid air by the abnormal southwesterly wind,which is related with an anomalous anticyclone over the Philippine *** thermodynamic effect is partly induced by the positive advection of anomalous MSE(mainly latent energy)by the mean vertical *** analysis of the dynamic and thermodynamic effects is useful to understand the underlying physical mechanisms leading to the unusual rainy season in the Yangtze River valley in summer *** is also helpful to put forward a few speculations on the potential role of global warming whose primary effect is,after all,to change the thermal state of the atmosphere.

关键词： exceptional rainfall Yangtze River valley global warming dynamic and thermodynamic effects

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Detection and Attribution of Changes in Summer Compound Hot and Dry Events over Northeastern China with CMIP6 Models

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Journal of Meteorological Research 2022年第1期36卷 37-48页

作者： Wei li Zhihong JIANG laurent ZXli Jing-Jia LUO Panmao ZHAI Key Laboratory of Meteorological Disaster of Ministry of Education/Joint International Research Laboratory of Climate and Environment Change/Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters Nanjing University of Information Science&TechnologyNanjing 210044China Laboratory of Severe Weather Fujian Institute of Meteorological SciencesFuzhou 350001China Laboratoire de Météorologie Dynamique Centre National de la Recherche ScientifiqueSorbonne UniversitéEcole Normale SupérieureEcole PolytechniqueParis 75252France State Key Laboratory of Severe Weather Chinese Academy of Meteorological SciencesChina Meteorological AdministrationBeijing 100081China

Northeastern China has experienced a significant increase in summer compound hot and dry events(CHDEs),posing a threat to local agricultural production and sustainable *** study investigates the detectable anthropogenic signal in the long-term trend of CHDE and quantifies the contribution of different external forcings.A probability-based index(PI)is constructed through the joint probability distribution to measure the severity of CHDE,with lower values representing more severe *** of CHDE to external forcing was assessed with simulations from the Coupled Model Intercomparison Project phase 6(CMIP6).The results show a significant increase in the severity of CHDE over northeastern China during the past *** trend of regional averaged PI is-0.28(90%confidence interval:-0.43 to-0.13)per 54 yr and it is well reproduced in the historical forcing *** attribution method of optimal fingerprinting was firstly applied to a two-signal configuration with anthropogenic forcing and natural forcing;the anthropogenic impact was robustly detected and it explains most of the observed trend of ***,three-signal analysis further demonstrated that the anthropogenic greenhouse gases dominantly contribute to the observed change,while the anthropogenic aerosol and natural forcing have almost no contribution to the observed *** a compound event concurrently exceeding the 95 th percentile of surface air temperature and precipitation reversal in the current period,its likelihood exhibits little change at 1.5℃global warming,but almost doubled at 2.0℃global warming.

关键词： compound hot and dry event(CHDE) detection and attribution northeastern China future projection

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Tuberculosis Prevalence Trends from a Predictive Modelling Study-10 High-Burden Countries,1980-2035

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China CDC weekly 2024年第12期6卷 225-229,I0001,I0002页

作者： Qiuping Chen Qiao liu Kangguo li laurent Gavotte Roger Frutos Tianmu Chen CIRAD IntertrypMontpellierFrance Universitéde Montpellier MontpellierFrance State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics National Innovation Platform for Industry-Education Integration in Vaccine ResearchXiamen UniversityXiamen CityFujian ProvinceChina State Key Laboratory of Vaccines for Infectious Diseases Xiang An Biomedicine LaboratorySchool of Public HealthXiamen UniversityXiamen CityFujian ProvinceChina Espace-Dev Universitéde MontpellierMontpellierFrance

What is already known about this topic?Given the challenges presented by drug-resistant strains of tuberculosis(TB)and the rising mobility of the population,achieving the objective of eradicating TB appears *** is added by this report?The examination of TB incidence trends in 10 highburden countries(HBCs)indicated a steady rise in cases,with India and China jointly accounting for nearly 70%of the *** for the future show diverse trajectories in these countries,with potential difficulties in reaching the TB elimination target,especially in Nigeria,Congo,and South *** are the implications for public health practice?The number of TB cases is on the *** is crucial to learn from successful strategies to improve TB prevention and control worldwide through collaborative efforts.

关键词： tuberculosis uncertain Tuberculosis

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Are Sc-C and Sc-P Bonds Reactive in Scandium Phosphinoalkylidene Complex？ Insights on a Versatile Reactivity

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Chinese Journal of Chemistry 2018年第10期36卷 904-908页

作者： Weiqing Mao li Xiang Carlos Alvarez Lamsfus laurent Maron Xuebing Leng Yaofeng Chen State Key Laboratory of Organometallic Chemistry Center for Excellence in Molecular Synthesis Shanghai Institute of Organic Chemistry Univer- sity of Chinese Academy of Sciences Chinese Academy of Sciences 345 Lingling Road Shanghai 200032 China LPCNO CNRS & INSA Universite Paul Sabatier 135 Avenue de Rangueil 31077 Toulouse France

The peculiar electronic structure of scandium phosphinoalkylidene complex [LSc{C（SiMe3）PPh2}THF] （L=[MeC（NDIPP）CHC（NDIPP）Me]-）, DIPP= 2,6-（Pr）2C6H3） leads to an interesting versatile reactivity, which is demonstrated both experimentally and computationally. The complex undergoes [2＋2] cycloaddition reactions with alkynes, and easily activates various X-O bonds such as C-O of propylene oxide, N-O of 3,5-dimethylisoxazole, B-O of pinacolborane and Si-O of triethoxysilane. These reactions occur on the Sc-C bond of the phosphinoalkylidene complex. Interestingly, the Sc-P bond can also be activated as the presence of a Sc-C-P three center π interaction in the complex allows performing C-F activation of 2,6-difluoro- pyridine and 1,2 addition with imine or ketone. The complex also reacts with metal complexes, [（COD）RhCl]2 and （Ph3P）AuCl, to form structural intriguing heterobimetallic complexes.

关键词： alkylidene density functional calculations multiple bonds phosphorus scandium

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Updated Inventory of Carbon Monoxide in the Taurus Molecular Cloud

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Research in Astronomy and Astrophysics 2023年第9期23卷 56-65页

作者： Yan Duan Di li laurent Pagani Paul F.Goldsmith Tao-Chung Ching Chen Wang Jinjin Xie National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China University of Chinese Academy of Sciences Beijing 100049China Research Center for Intelligent Computing Platforms Zhejiang LaboratoryHangzhou 311100China NAOC-UKZN Computational Astrophysics Centre University of KwaZulu-NatalDurban4000South Africa LERMA&UMR 8112 du CNRS Observatoire de ParisPSL UniversitySorbonne UniversitésCNRSF-75014 ParisFrance Jet Propulsion Laboratory California Institute of Technology4800 Oak Grove DrivePasadenaCA91109USA Jansky Fellow National Radio Astronomy Observatory1003 Lopezville RoadSocorroNM 87801USA Shanghai Astronomical Observatory Chinese Academy of Sciences National Astronomical ObservatoriesChinese Academy of SciencesShanghai 200030China

The most extensive survey of carbon monoxide(CO)gas in the Taurus molecular cloud relied on ^(12)CO and ^(13)CO J=1→0 emission only,distinguishing the region where ^(12)CO is detected without ^(13)CO(named mask 1 region)from the one where both are detected(mask 2 region)(Goldsmith et al.2008;Pineda et al.2010).We have taken advantage of recent ^(12)CO J=3→2 James Clerk Maxwell Telescope observations,where they include mask 1regions to estimate density,temperature,and N(CO)with a large velocity gradient *** represents 1395 pixels out of~1.2 million in the mark 1 *** to Pineda et al.(2010)results and assuming a Tkin of 30 K,we find a higher volume density of molecular hydrogen of 3.3×10^(3) cm^(-3),compared to their 250-700 cm^(-3),and a CO column density of 5.7×10^(15)cm^(-2),about a quarter of their *** differences are important and show the necessity to observe several CO transitions to better describe the intermediate region between the dense cloud and the diffuse atomic *** observations to extend the ^(12)CO J=3→2 mapping further away from the ^(13)COdetected region comprising mask 1 are needed to revisit our understanding of the diffuse portions of dark clouds.

关键词： submillimeter ISM-ISM clouds-ISM molecules

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Unraveling giant Cu（110） surface restructuring induced by a non-planar phthalocyanine

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Nano Research 2018年第5期11卷 2605-2611页

作者： Nataliya Kalashnyk Luke A. Rochford Dongzhe li Alexander Smogunov Yannick J. Dappe Tim S. Jones laurent Guillemot Institut des Sciences Moleculaires d'Orsay CNRS Universite Paris-Sud 11 Orsay 91405 France School of Chemistry The University of Birmingham Birmingham B15 2TT UK Department of Physics University ofKonstanz Konstanz 78457 Germany SPEC CEA CNRS Universite Paris-Saclay CEA Saclay Gif-sur-Yvette Cedex 91191 France

The surface stability of coinage metals is paramount when they are used as electrode materials for functional electronic devices incorporating organic semiconductors. In this work, it is shown that the adsorption of non-planar vanadyl phthalocyanine molecules on Cu（110） drastically restructured the metal surface at room temperature, which was further enhanced upon moderate annealing. Scanning tunneling microscopy imaging demonstrated that the surface was restructured at step edges into sawtooth features that gradually replaced the （110） terraces. The edges of the modified steps were preferentially composed of chiral （1×6） kink sites decorated with vanadyl phthalocyanine molecules adsorbed in a tilted configuration with the oxygen atom pointing downwards. These results can have a strong impact on the optimization of the performance of organic devices integrated with phthalocyanine molecules.

关键词： surface restructuring step-etching chiral kink phthalocyanine

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Genomic consequences of population decline in critically endangered pangolins and their demographic histories

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National Science Review 2020年第4期7卷 798-814页

作者： Jing-Yang Hu Zi-Qian Hao laurent Frantz Shi-Fang Wu Wu Chen Yun-Fang Jiang Hong Wu Wei-Min Kuang Haipeng li Ya-Ping Zhang li Yu State Key Laboratory for Conservation and Utilization of Bio-Resource in Yunnan School of Life Sciences Yunnan University State Key Laboratory of Genetic Resources and Evolution Kunming Institute of Zoology Chinese Academy of Sciences Kunming College of life Science University of Chinese Academy of Sciences CAS Key Laboratory of Computational Biology CAS-MPG Partner Institute for Computational Biology Shanghai Institute of Nutrition and Health Chinese Academy of Sciences University of Chinese Academy of Sciences School of Biological and Chemical Sciences Queen Mary University of London The Palaeogenomics and Bio-Archaeology Research Network Department of Archaeology University of Oxford Guangzhou Zoo Lushui Management and Conservation Branch of Gaoligong Mountain National Nature Reserve Center for Excellence in Animal Evolution and Genetics Chinese Academy of Sciences

Pangolins are among the most critically endangered animals due to heavy poaching and worldwide trafficking. However, their demographic histories and the genomic consequences of their recent population declines remain unknown. We generated high-quality de novo reference genomes for critically endangered Malayan(Manis javanica, MJ) and Chinese(M. pentadactyla, MP) pangolins and re-sequencing population genomic data from 74 MJs and 23 MPs. We recovered the population identities of illegally traded pangolins and previously unrecognized genetic populations that should be protected as evolutionarily distinct conservation units. Demographic reconstruction suggested environmental changes have resulted in a population size fluctuation of pangolins. Additionally, recent population size declines due to human activities have resulted in an increase in inbreeding and genetic load. Deleterious mutations were enriched in genes related to cancer/diseases and cholesterol homeostasis, which may have increased their susceptibility to diseases and decreased their survival potential to adapt to environmental changes and high-cholesterol diets. This comprehensive study provides not only high-quality pangolin reference genomes, but also valuable information concerning the driving factors of long-term population size fluctuations and the genomic impact of recent population size declines due to human activities, which is essential for pangolin conservation management and global action planning.

关键词： pangolins population genomics population declines genetic diversity inbreeding genetic load demographic history

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遥感图像的显著-概要特征提取与目标检测

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北京航空航天大学学报 2010年第6期36卷 659-662页

作者：李志成秦世引 Itti laurent 北京航空航天大学自动化科学与电气工程学院北京100191 美国南加州大学计算机科学系洛杉矶90089

针对巨幅遥感图像的目标检测问题,提出了一种基于显著-概要特征的遥感图像自动目标检测算法.采用滑动窗口将巨幅遥感图像划分为若干个小尺度的区域,针对各个小尺度分块图像,借鉴人类视觉生理功能特性之原理,提取其显著特征和概要特征,... 详细信息

针对巨幅遥感图像的目标检测问题,提出了一种基于显著-概要特征的遥感图像自动目标检测算法.采用滑动窗口将巨幅遥感图像划分为若干个小尺度的区域,针对各个小尺度分块图像,借鉴人类视觉生理功能特性之原理,提取其显著特征和概要特征,其中的显著特征代表了图像中的显著信息及显著区域空间分布和关联信息,概要特征可从整体上反映该区域的背景/目标关联信息.通过对分块区域图像的分类鉴别以实现目标检测.实验结果表明:此方法能以高可靠性和高精确度检测出巨幅遥感图像中的目标.

关键词：目标检测显著特征概要特征遥感图像

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Interplay between Kitaev interaction and single ion anisotropy in ferromagnetic CrI_(3) and CrGeTe_(3) monolayers

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npj Computational Materials 2018年第1期4卷 185-190页

作者： Changsong Xu Junsheng Feng Hongjun Xiang laurent Bellaiche Physics Department and Institute for Nanoscience and Engineering University of ArkansasFayettevilleAR 72701USA Key Laboratory of Computational Physical Sciences(Ministry of Education) State Key Laboratory of Surface Physicsand Department of PhysicsFudan University200433 ShanghaiChina School of Physics and Materials Engineering Hefei Normal University230601 HefeiChina Collaborative Innovation Center of Advanced Microstructures 210093 NanjingChina

Magnetic anisotropy is crucially important for the stabilization of two-dimensional(2D)magnetism,which is rare in nature but highly desirable in spintronics and for advancing fundamental *** works on CrI3 and CrGeTe_(3) monolayers not only led to observations of the long-time-sought 2D ferromagnetism,but also revealed distinct magnetic anisotropy in the two systems,namely Ising behavior for CrI3 versus Heisenberg behavior for CrGeTe_(3).Such magnetic difference strongly contrasts with structural and electronic similarities of these two materials,and understanding it at a microscopic scale should be of large ***,firstprinciples calculations are performed and analyzed to develop a simple Hamiltonian,to investigate magnetic anisotropy of CrI3 and CrGeTe_(3) *** anisotropic exchange coupling in both systems is surprisingly determined to be of ***,the interplay between this Kitaev interaction and single ion anisotropy(SIA)is found to naturally explain the different magnetic behaviors of CrI3 and CrGeTe_(3).Finally,both the Kitaev interaction and SIA are further found to be induced by spin–orbit coupling of the heavy ligands(I of CrI3 or Te of CrGeTe_(3))rather than the commonly believed 3d magnetic Cr ions.

关键词： anisotropy interaction coupling

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Generation,bonding and reactivity of transient zinc-substituted silylenes

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Science China Chemistry 2024年第4期67卷 1256-1262页

作者： Cheng Xu Thayalan Rajeshkumar laurent Maron Xuebing Leng Yaofeng Chen State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic ChemistryUniversity of Chinese Academy of SciencesChinese Academy of SciencesShanghai 200032China Spin-X Institute School of Chemistry and Chemical EngineeringState Key Laboratory of Luminescent Materials and DevicesGuangdong-Hong Kong-Macao Joint Laboratory of Optoelectronic and Magnetic Functional MaterialsSouth China University of TechnologyGuangzhou 510641China LPCNO CNRS&INSAUniversitéPaul SabatierToulous 31077France

The metal-substituted silylenes are of high interest,as the theoretical studies indicated that the silylenes with electropositive substituents have a small ΔE_(S-T)(singlet-triplet energy gap)or even the ground-state ***,such compounds are highly unstable,and only two transient alkali metal-substituted silylenes M(^(t)Bu_(3)Si)Si:(M=li,K)were generated by photoextrusion of the alkali metal-substituted silacyclopropenes and merely studied by spectroscopic method(EPR)at low temperature(14 to 50 K).Herein,we report the generation of transient zinc-substituted silylenes from zinc silacyclopropanyl complexes under very mild and convenient *** generated transient zinc-substituted silylenes are highly reactive and undergo intermolecular cycloaddition with alkenes for the synthesis of zinc-substituted Si-heterocyclic *** there is no substrate,the zinc-substituted silylenes attack the C-C bonds of the β-diketiminato ligands and break the C-C *** studies further highlight the silylene nature of the zinc-substituted silylene and a very small ΔE_(S-T)(4.4 kcal/mol).

关键词： zinc complex silylene C-C bond cleavage cycloaddition DFT calculations

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