检索结果-南通市图书馆

The mini-GWAC optical follow-up of gravitational wave alerts – results from the O2.campaign and prospects for the upcoming O3 run

引用

research in Astronomy and Astrophysics 2020年第1期20卷 107-123页

作者： Damien Turpin Chao Wu Xu-Hui Han Li-Ping Xin Sarah Antier Nicolas Leroy Li Cao Hong-Bo Cai Bertrand Cordier Jin-Song Deng Wen-Long Dong Qi-Chen Feng Lei huang Lei Jia Alain Klotz Cyril Lachaud hua-Li Li En-{2. Liang Shun-Fang Liu Xiao-Meng Lu Xian-Min Meng Yu-Lei Qiu Hui-Juan Wang Jing Wang Shen Wang Xiang-Gao Wang Jian-Yan {2. Bo-Bing Wu Yu-Jie Xiao Da-{2. Xu Yang Xu Yuan-Gui Yang Pin-Pin zhang Ruo-Song zhang Shuang-Nan zhang Ya-Tong zhengandSi-Cheng Zou Key Laboratory of Space Astronomy and Technology National Astronomical ObservatoriesChinese Academy of SciencesBeijing 100101China LAL Univ.Paris-SudCNRS/IN2P3Universite Paris-SaclayF-91898 OrsayFrance APC Univ Paris DiderotCNRS/IN2P3CEA/lrfuObs de ParisSorbonne Paris CiteFrance CEA Saclay DRF/IRFU/Departement d’astrophysique91191 Gif-sur-YvetteFrance School of Astronomy and Space Science University of Chinese Academy of SciencesBeijing 101408China Universite de Toulouse IRAP 14 Av.Edouard BelinF-31000 ToulouseFrance Institut de Recherche en Astrophysique et Planetologie(IRAP) UPS-OMPToulouseFrance Guangxi Key Laboratory for Relativistic Astrophysics School of Physical Science and TechnologyGuangxi UniversityNanning 530004China institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China School of Physics and Electronic Information Huaibei Normal UniversityHuaibei 235000China

The second(O2.observational campaign of gravitational waves(GWs)organized by the LIGO/Virgo Collaborations has led to several breakthroughs such as the detection of GW signals from merger systems involving black holes or neutrons *** O2.1. GW alerts were sent to the astronomical community with sky regions mostly covering over hundreds of square *** them,six were finally confirmed as real astrophysical *** 2.1.,a new set of ground-based robotic telescopes called Ground-based Wide Angle Camera system(GWAC)project and its pathfinder mini-GWAC has been developed to contribute to the various challenges of multi-messenger and time domain *** GWAC system is built up in the framework of the ground-segment system of the SVOM mission that will be devoted to the study of the multi-wavelength transient sky in the next *** O2.only the mini-GWAC telescope network was fully *** to the wide field of view and fast automatic follow-up capabilities of the mini-GWAC telescopes,they were adept to efficiently cover the sky localization areas of GW event *** this paper,we present the mini-GWAC pipeline we have set up to respond to GW alerts and we report our optical follow-up observations of eight GW alerts detected during the O2.*** observations provided the largest coverage of the GW localization areas with a short latency made by any optical *** found tens of optical transient candidates in our images,but none of those could be securely associated with any confirmed black hole-black hole merger *** on this first experience and the near future technical improvements of our network system,we will be more competitive in detecting the optical counterparts from some GW events that will be identified during the upcoming O3 run,especially those emerging from binary neutron star mergers.

关键词： gravitational waves methods:data analysis methods:observational (stars:)gammaray burst:general

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

Excellent long-term reactivity of inhomogeneous nanoscale Fe-based metallic glass in wastewater purification

引用

Science china Materials 2020年第3期63卷 453-466页

作者： Shuang-Qin Chen Ke-Zhen Hui Liang-{1. Dong Zhun Li Qing-hua zhang Lin Gu wei Zhao Si Lan Yubin Ke Yang Shao Horst Hahn Ke-Fu Yao School of Material Science and Engineering Tsinghua UniversityBeijing 100084China Herbert Gleiter institute of Nanoscience Nanjing University of Science and TechnologyNanjing 210094China china Iron&Steel {1. {2. Group Beijing 100081China beijing Laboratory for Electron Microscopy Institute of PhysicsCASBeijing 100190China institute of Nanotechnology Karlsruhe Institute of Technology76344 Eggenstein-LeopoldshafenGermany china Spallation Neutron Source Institute of High Energy PhysicsChinese Academy of SciencesDongguan 523803China

Metallic glasses(MGs)have attracted great attention in wastewater treatment because of their high reactivity arising from amorphous structure,large residual stress and high density of low coordination ***,the reactivity of MGs would gradually slow down with time due to the passivation of active sites by corrosion products,resulting in limited long-term reactivity,which is also an unsolved key issue for established crystalline zero valent iron(ZVI)***,such problems are successfully overcome by introducing nanoscale chemical inhomogeneities in Fe-based MG(Fe-MGI),which apparently contributes to local galvanic cell effect and accelerates electron transfer during degradation *** importantly,the selective depletion of Fe0 causes local volume shrinkage and crack formation,leading to self-peeling of precipitated corrosion products and reacted *** fresh low coordination sites could be continuously provided,counteracting the mass transport and reactivity deteriorating ***,Fe-MGI demonstrates excellent long-term reactivity and self-refreshing properties even in neutral *** present results provide not only a new candidate but also a new route of designing ZVI materials for wastewater treatment.

关键词： Fe-based metallic glass inhomogeneity self-refreshing wastewater treatment catalysis

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

Prospective study of light dark matter search with a newly proposed DarkSHINE experiment

引用

Science china(Physics,Mechanics & Astronomy) 2023年第1期66卷 124-138页

作者： Jing Chen Ji-Yuan Chen Jun-Feng Chen Xiang Chen Chang-Bo Fu Jun Guo Le He zheng-Ting He Kim Siang Khaw Jia-Lin Li Liang Li Shu Li Meng Lv Dan-Ning Liu Han-Qing Liu Kun Liu Qi-Bin Liu Yang Liu Ze-Jia Lu Cen Mo Si-Yuan Song Xiao-Long Wang Yu-Feng Wang Zhen Wang Zi-Rui Wang {1.-Hao Wu Dao Xiang Hai-Jun Yang Jun-{2. zhang Yu-Lei zhang Zhi-Yu Zhao Xu-Liang Zhu Chun-Xiang Zhu Yi-Fan Zhu Tsung-DaoLee institute Shanghai Jiao Tong UniversityShanghai 201210China institute of Nuclear and Particle Physics School of Physics and AstronomyShanghai Jiao Tong UniversityShanghai 200240China Key Laboratory for Particle Astrophysics and Cosmology(MOE) Shanghai Key Laboratory for Particle Physics and Cosmology(SKLPPC)Shanghai 200240China Center for High Energy Physics Peking UniversityBeijing 10087lChina School of Mechanical and Electronic Engineering Suzhou UniversitySuzhou 234000China School of Aeronautics and Astronautics Shanghai Jiao Tong UniversityShanghai 200240China School of Electronics Information and Electrical EngineeringShanghai Jiao Tong UniversityShanghai 200240China R&D Center Shanghai Instituteof CeramicsChinese Academyof SciencesShanghai 20189China Key Laboratory of Nuclear Physics and lon-beam Application(MOE) Fudan UniversityShanghai 200443China institute of Modern Physics Fudan UniversityShanghai 200443China IKey Laboratory for Laser Plasmas(MOE) School of Physics and AstronomyShanghai Jiao Tong UniversityShanghai 200240China zhangjiang {1. for Advanced Study Shanghai JiaoTong UniversityShanghai 200240.China College of Literature Scienceand the ArtsUniversity of MichiganAnn Arbor MI 48109-1040USA Deparment of Physics Swiss Federal Institnute of Technology ZurichZurich 8093Swizerland

Dark photons have been well motivated as strong candidates for dark force carriers and light dark matter in the sub-GeV mass *** with collider experiments,fixed-target experiments provide a complementary approach to searching for dark photons,particularly in the lower mass *** have studied the physics potential of the electron-on-target experiment based on the Shanghai SHINE facility,which provides 1. MHz single electron beam at 8 GeV *** analysis focuses on dark photons being produced via electron and nucleon interaction and then decays to dark matter candidates,which escape detection as missing momentum in the *** experiment takes advantage of using missing momentum to enhance signal versus background separation *** this study,signal samples as a function of dark photon mass and an inclusive background sample with 2.5 billion events are simulated with *** better background estimates,major rare background processes have also been *** paper presents the experiment and detector design,signal and background simulations,analysis strategy,and the prospective study of the experiment *** 9×1.^(1.) electron-on-target events(about three years running),this experiment is expected to rule out most of the sensitive regions predicted by popular dark photon models.

关键词： dark matter dark photon electron-on-target experiment

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

Five-year in-orbit background of Insight-HXMT

引用

Radiation Detection Technology and Methods 2023年第1期7卷 34-47页

作者： Jin-Yuan Liao Shu zhang Juan zhang Gang Li Zhi Chang Yu-Peng Chen Ming-Yu Ge Jing Jin Xue-Feng Lu Yuan You Xue-Lei Cao Yong Chen Yue {2.ng wei-Chun Jiang Xiao-Bo Li Xu-Fang Li zheng-wei Li Cong-Zhan Liu Ying Tan Yan-Ji Yang Yi-Fei zhang Hai-Sheng Zhao Fang-Jun Lu Yu-Peng Xu Jin-Lu Qu Li-Ming Song S{2.ng-Nan zhang Key Laboratory of Particle Astrophysics Institute of High Energy PhysicsChinese Academy of Sciences19B Yuquan RoadShijingshan DistrictBeijing 100049China Key Laboratory of Stellar and Interstellar Physics and School of Physics and Optoelectronics Xiangtan UniversityYuhu DistrictXiangtan 411105China University of chinese academy of sciences 19A Yuquan RoadShijingshan DistrictBeijing 100049China Key Laboratory of Space Astronomy and Technology National Astronomical ObservatoriesChinese Academy of Sciences20A Datun RoadChaoyang DistrictBeijing 100012China

Purpose We present the five-year in-orbit background evolution of Insight-HXMT since the launch,as well as the effects of the background model in data *** The backgrounds of the three main payloads,i.e.,low-energy telescope,medium-energy telescope,and high-energy telescope,are *** evolution of the background over time is obtained by simply comparing the background in every year during the in-orbit operation of *** The major observational characteristics of the Insight-HXMT in-orbit background are presented,including the light curve,spectrum,geographical distribution,and long-term *** systematic error in background estimation is investigated for every *** The observational characteristics of the five-year in-orbit background are consistent with our knowledge of the satellite design and the space environment,and the background model is still valid for the latest observations of Insight-HXMT.

关键词： Instrumentation:detectors Space vehicles:instruments Methods:data analysis X-rays:general

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

Hydrochemical regime and its mechanism in Yamzhog Yumco Basin, South Tibet

引用

Journal of geographical {1. 2017年第9期27卷 1111-1122页

作者： ZHE Meng zhang Xueqin WANG Bu{1. SUN Rui {2. Du Key Laboratory of Land Surface Pattern and Simulation Institute of Geographic Sciences and Natural Resources Research CAS Beijing 100101 China University of chinese academy of sciences Beijing 100049 China Rubber research {1. Chinese Academy of Tropical Agriculture Sciences Danzhou 571737 Hainan China

The hydrochemistry of alpine lakes reflects water characteristic and its response to climatic change. Over 300 water samples had been collected from 52.sites of 5 lakes and 7 inflowing rivers in the Yamzhog Yumco Basin, South Tibet, during 2.09-2.1., basing which the hydrochemical regime and its mechanism were analyzed along with the adoption of hydrological investigations in 1.79 and 1.84 as well. Results revealed that the waters were hard with weak alkalinity for the Yamzhog Yumco Basin. Most of them were fresh, and the rest were slightly saline. The hydrochemical types of 5 lakes （i.e., Lake Yamzhog Yum Co, Puma Yum Co, Bajiu Co, Kongmu Co, and Chert Co） were SO4^2.-HCO3^--Mg^2.-Na^＋, HCO3^-- SO4^2.-Mg^2.-Ca^2., SO4^2.-Mg^2.-Na^＋, SO4^2.-HCO3^--Ca^2., and SO4^2.-Na^＋-Mg^2.-Ca^2., respectively. As for rivers, HCO3^- and SO4^2. were the major anions, and Ca2. was the dominant cation. Lake Yamzhog Yum Co, the largest lake in the basin, exhibited remarkable spatial variations in hydrochemistry at its surface but irregular changes with depth. The weathering of evaporates and carbonates, together with evaporation and crystallization, were the major mechanisms controlling the hydrochemistry of waters in the Yamzhog Yumco Basin. Global warming also had significant impacts on hydrochemical variations.

关键词： hydrochemicai regime control mechanism Piper diagram Gibbs model Yamzhog Yumco Basin alpine lake

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

Advances in nuclear detection and readout techniques

引用

Nuclear Science and Techniques 2023年第12期34卷 281-358页

作者： Rui He Xiao‑Yang Niu Yi Wang Hong‑wei Liang Hong‑Bang Liu Ye Tian Hong‑Lin {1. Chao‑Jie Zou Zhi‑Yi Liu Yun‑Long {1. Hai‑Bo Yang Ju huang Hong‑Kai Wang wei‑Jia Han Bei Cao Gang Chen Cong Dai Li‑Min Duan Rui‑Rui Fan Fang‑Fa Fu Jian‑hua Guo Dong Han wei Jiang Xian‑Qin Li Xin Li Zhuo‑Dai Li Yu‑Tie Liang Shun Liao De‑Xu Lin Cheng‑Ming Liu Guo‑Rui Liu Jun‑Tao Liu Ze Long Meng‑Chen Niu Hao Qiu Hu Ran Xiang‑Ming Sun Bo‑Tan Wang Jia Wang Jin‑Xiang Wang Qi‑Lin Wang Yong‑Sheng Wang Xiao‑Chuan Xia Hao‑Qing Xie He‑Run Yang Hong Yin Hong Yuan Chun‑Hui {1. Rui‑Guang Zhao Ran zheng Cheng‑Xin Zhao institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China School of Nuclear Science and Technology University of Chinese Academy of SciencesBeijing 100049China Advanced Energy Science and Technology Guangdong Laboratory Huizhou 516000China Key Laboratory of Particle and Radiation Imaging Department of Engineering PhysicsTsinghua UniversityBeijing 100084China School of Integrated Circuits Dalian University of TechnologyDalian 116020China Guangxi Key Laboratory for Relativistic Astrophysics School of Physical Science and TechnologyGuangxi UniversityNanning 530004China School of Nuclear Science and Technology Lanzhou UniversityLanzhou 730000China State Key Laboratory of Particle Detection and Electronics University of Science and Technology of ChinaHefei 230026China Department of Radiation Oncology National Cancer Center/National Clinical Research Center for Cancer/Cancer HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100021China Electronic Engineering School Heilongjiang UniversityHarbin 150080China Spallation Neutron Source Science Center Dongguan 523803China Micro‑electronic Department Harbin Institute of TechnologyHarbin 150001China Purple Mountain Observatory Chinese Academy of SciencesNanjing 210034China Liaoning academy of Materials Shenyang 110167China Istituto Nazionale di Fisica Nucleare Sezione di PerugiaPerugiaItaly School of Mathematics and Physics Chengdu University of TechnologyChengdu 620035China PLAC Key Laboratory of Quark and Lepton Physics(MOE)Central China Normal UniversityWuhan 430079China School of Electronics and Information Northwestern Polytechnical UniversityXi’an 710129China State Key Lab of Superhard Materials College of PhysicsJilin UniversityChangchun 130012China School of Computer Science Northwestern Polytechnical UniversityXi’an 710129China

“A Craftsman Must Sharpen His Tools to Do His Job,”said *** detection and readout techniques are the foundation of particle physics,nuclear physics,and particle astrophysics to reveal the nature of the ***,they are being increasingly used in other disciplines like nuclear power generation,life sciences,environmental sciences,medical sciences,*** article reviews the short history,recent development,and trend of nuclear detection and readout techniques,covering Semiconductor Detector,Gaseous Detector,Scintillation Detector,Cherenkov Detector,Transition Radiation Detector,and Readout *** explaining the principle and using examples,we hope to help the interested reader underst and this research field and bring exciting information to the community.

关键词： Silicon detector Wide bandgap detector Time projection chamber(TPC) Multigap resistive plate chamber detector(MRPC) Scintillation detector Calorimeters Cherenkov detector Transition radiation detector Artificial intelligence Trigger-less readout

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

chinese Experts Consensus on Pre-examination and Triage in Dermatology Clinics during the COVID-1. Outbreak

引用

International Journal of Dermatology and Venereology 2020年第2期3卷 65-67页

作者： Ma Lin Wang Gang Mu Qi-Ri Ran Yu-Ping Liu Quan-Zhong Xiao Sheng-Xiang zhang Xue-Jun zhang Jian-Zhong zhang Fu-Ren He Li Chen Ai-Jun Chen Xiang zheng Jie Yang Rong-Ya Yao Zhi-Rong Tu Ping Li Yu-Zhen Gao Xing-hua Xu Jin-hua Gu Heng Cheng Bo Lai wei Lu Qian-Jin chinese Society of Dermatology Department of Dermatology Beijing Children’s HospitalCapital Medical UniversityBeijing 100045China Department of Dermatology Xijing HospitalThe Fourth MilitaryMedical UniversityXi’anShaanxi 710032China Department of Dermatology InnerMongolia Autonomous Region People’s HospitalHohhotInner Mongolia 010017China Department of Dermatovenereology West China HospitalSichuan UniversityChengduSichuan 610000China Department of Dermatology Tianjin Medical UniversityGeneral HospitalTianjin 300052China Department of Dermatology and Venereology TheSecond Affiliated Hospital of Xi’an Jiaotong UniversityXi’anShaanxi 710004China Department of Dermatology Institute of DermatologyAnhui Medical UniversityHefeiAnhui 230032China Department of Dermatology Peking University People’sHospitalBeijing 100044China Skin Disease Hospital Affiliated to Shandong FirstMedical University JinanShandong 250022China Department of Dermatology FirstAffiliated Hospital of Kunming Medical UniversityKunmingYunnan 650032China Department of Dermatology The First Affiliated Hospital of Chongqing MedicalUniversityChongqing 400016China Department of Dermatology Xiangya HospitalCentral South UniversityChangshaHunan 410008China Department of Dermatology Ruijin HospitalShanghai Jiao Tong University School of MedicineShanghai 200025China Department of Dermatology Seventh Medical Center of PLA General HospitalBeijing 100191China Department of Dermatology Xinhua HospitalShanghai Jiao TongUniversity School of MedicineShanghai 200092China Department of Dermatology Peking University First HospitalBeijing 100034China Department of Dermatology TheSecond Affiliated Hospital of Harbin Medical UniversityHarbinHeilongjiang 150001China Department of Dermatology The First Hospital of China Medical UniversityShenyangLiaoning 110001China Department of Dermatology Huashan HospitalFudanUniversityShanghai 200040China Hospital for Skin Diseases(institute ofDermatology) Chinese Academy of Medical Sciences and Peking Union Medical

The SARS-CoV-2.infection has brought a great challenge in prevention and control of the national epidemic of coronavirus disease 2.1.(COVID-1.)in *** the COVID-1. epidemic,properly carrying out pre-examination and triage for patients with skin lesions and fever has become a practical problem encountered in hospitals for skin diseases and dermatology clinics in general *** of the carriers of the SARS-CoV-2.and patients with COVID-1. in the early stage may not present with any symptoms of COVID-1.,while certain other skin diseases can also cause ***,to properly deal with the patients presenting at dermatology clinics,the chinese Society of Dermatology organized experts to formulate principles and procedures for the pre-examination and triage of patients at dermatology clinics during the COVID-1. epidemic.

关键词： SARS-CoV-2 COVID-1. fever skin disease pre-examination triage

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

Experimental study on soil CO_2.emission in the alpine grassland ecosystem on Tibetan Plateau

引用

Science china Earth {1. 2005年第Z1期48卷 218-224页

作者： zhang Xianzhou SHI Peili LIU Yunfen OUYANG {1. institute of Geographic {1. and {2. Resources research Chinese Academy of Sciences Beijing 100101 China Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing 100101 China Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing 100101 China Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing 100101 China

The Tibetan Plateau, the Roof of the World, is the highest plateau with a mean elevation of 4000 m. It is characterized by high levels of solar radiation, low air temperature and low air pressure compared to other regions around the world. The alpine grassland, a typical ecosystem in the Tibetan Plateau, is distributed across regions over the elevation of 4500 m. Few studies for carbon flux in alpine grassland on the Tibetan Plateau were conducted due to rigorous natural conditions. A study of soil respiration under alpine grassland ecosystem on the Tibetan Plateau from October 1.99 to October {1.01.was conducted at Pangkog County, Tibetan Plateau (31.{1.°N, 90.01.E, elevation 4800 m). The measurements were taken using a static closed chamber technique, usually every two weeks during the summer and at other times at monthly intervals. The obvious diurnal variation of CO{1.emissions from soil with higher emission during daytime and lower emission during nighttime was discovered. Diurnal CO{1.flux fluctuated from minimum at 05:00 to maximum at 1.:00 in local time. Seasonal CO{1.fluxes increased in summer and decreased in winter, representing a great variation of seasonal soil respiration. The mean soil CO{1.fluxes in the alpine grassland ecosystem were {1..39 mgCO{1.· m-{1.· h-1. with an average annual amount of soil respiration of 1.7.46 gCO{1.· m-{1.· a-1. Net ecosystem productivity is also estimated, which indicated that the alpine grassland ecosystem is a carbon sink.

关键词： soil CO2 emission, alpine grassland ecosystem, Tibetan Plateau.

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

Vacuum Ultraviolet Free-Electron Laser Photoionization Mass Spectrometry of Alpha-pinene Ozonolysis

引用

chinese Journal of Chemical Physics 2022年第2期35卷 281-288,I0002页

作者： Xiangyu Zang Zhaoyan zhang Chong Wang Tiantong Wang Huijun {1. {2. Xie Jiayue Yang Dongxu Dai Guorong Wu weiqing zhang Gang Li Xueming Yang Ling Jiang zhang Dayu School of Chemistry Dalian University of TechnologyDalian 116024China State Key Laboratory of Molecular Reaction Dynamics Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China University of chinese academy of sciences Beijing 100049China Department of Chemistry School of ScienceSouthern University of Science and TechnologyShenzhen 518055China

α-pinene is the most abundant monoterpene that represents an important family of volatile organic *** identification of key transient compounds during theα-pinene ozonolysis has been proven to be a challenging experimental target because of a large number of intermediates and products *** we exploit the recently developed hybrid instruments that integrate aerosol mass spectrometry with a vacuum ultraviolet free-electron laser to study theα-pinene *** experiments ofα-pinene ozonolysis are performed in an indoor smog chamber,with reactor having a volume of 2.m^(3) which is made of fluorinated ethylene propylene *** mass spectral peaks provide direct experimental signatures of previously unseen compounds produced from the reaction ofα-pinene with O_(3).With the aid of quantum chemical calculations,plausible mechanisms for the formation of these new compounds are *** findings provide crucial information on fundamental understanding of the initial steps ofα-pinene oxidation and the subsequent processes of new particle formation.

关键词： Vacuum ultraviolet free-electron laser Photoionization Mass spectrometry Volatile organic compound Ozonolysis

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

黄河水氢、氧同位素组成特征及其气候变化响应

引用

中国环境科学 2017年第5期37卷 1906-1914页

作者：范百龄张东陶正华赵志琦贵州民族大学贵州贵阳550025 中国科学院地球化学研究所环境地球化学国家重点实验室贵州贵阳550002 河南理工大学资源环境学院河南焦作454000 中国科学院地理科学与资源研究所北京100101

于2.1.0}7~8月采集黄河流域干流和支流河水样品,通过分析水体氢氧同位素组成的时间和空间变化特征,研究了河水主要来源的变化以及其对流域气候变化的响应.结果表明:除源头河水外,黄河干流河水δD值变化范围为-97.2.^-62.9‰,均值为-72.... 详细信息

于2.1.0}7~8月采集黄河流域干流和支流河水样品,通过分析水体氢氧同位素组成的时间和空间变化特征,研究了河水主要来源的变化以及其对流域气候变化的响应.结果表明:除源头河水外,黄河干流河水δD值变化范围为-97.2.^-62.9‰,均值为-72.2.,δ^(1.)O值范围为-1..0‰^-8.7‰,均值为-9.9‰,d盈余值为4.1.~1..0‰,均值为7.0‰;支流河水δD值范围为-1.3.8‰^-30.5‰,均值为-68.9‰,δ^(1.)O值范围为-1..7‰^-1.5‰,均值为-9.2.,d盈余值为-1..5‰~1..2.,均值为4.5‰.黄河干流兰州段以上以及中游河水氢氧同位素均值均偏负,而兰州至头道拐和下游河水氢氧同位素均值偏正,但河水氘盈余均值呈现由上游到下游逐渐降低的趋势.黄河干流和支流河水Na^+/Cl^-摩尔比值范围为0.94~3.02.源头区黄河干流河水Na^+/Cl^-摩尔比均值为1.02.兰州段以上均值为1.58,兰州至头道拐间均值为1.30,中游均值为1.79,下游均值为1.41.河水Na^+/Cl^-摩尔比值与河水δ^(1.)O值呈较好的负相关关系,表明黄河河水受大气降水补给,地下水补给以及蒸发作用等控制.与前人研究结果对比发现,2.00年以来黄河河水年径流量逐渐增加,上游河水受二次蒸发过程影响在降低,中游和下游河水受蒸发作用影响在减弱,显示区域气候干旱状况有所降低.

关键词：黄河流域氢氧同位素大气降水气候变化

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：