检索结果-南通市图书馆

Growth characteristics and response to climate change of Larix Miller tree-ring in China

Science China Earth sciences 2010年第6期53卷 871-879页

作者： SUN Yu1,4, WANG LiLi1,2,3, CHEN Jin5, DUAN JianPing1,4, SHAO XueMei1,2 & CHEN KeLong6 1 institute of Geographic sciences.and Natural Resources Research, {2. academy of sciences. Beijing 100101, China 2 institute of Tibetan Plateau Research, {2. academy of sciences. Beijing 100085, China 3 institute of Desert and Meteorology, China Meteorological Administration, Urumqi 830002, China 4 Graduate University of {2. academy of sciences. Beijing 100049, China 5 institute of Vertebrate Paleontology and Paleoanthropology, {2. academy of sciences. Beijing 100044, China 6 School of Life and Geography sciences. qinghai Normal University, xining {2.}, China 1. institute of Geographic sciences.and Natural Resources Research Chinese Academy of Sciences Beijing 100101 China4. Graduate University of Chinese Academy of Sciences Beijing 100049 China2. Institute of Tibetan Plateau Research Chinese Academy of Sciences Beijing 100085 China3. Institute of Desert and Meteorology China Meteorological Administration Urumqi 830002 China5. Institute of Vertebrate Paleontology and Paleoanthropology Chinese Academy of Sciences Beijing 100044 China6. School of Life and Geography Sciences Qinghai Normal University Xining 810008 China

As one of the earliest species used in dendrochronological studies, Larix responds sensitively to climate change. In this study, nine larch species and one variety from eleven sites were collected to study the growth characteristics of tree-ring width using dendrochronological methods. Ten residual tree-ring chronologies were developed to analyze their relationships with regional standardized anomaly series by Pearson’s correlation analysis. The results suggest that most of the chronologies had significantly positive correlations with the mean temperature and mean maximum temperature in May. The spring temperature evidently limited the radial growth of the larch species without precipitation control. The largest mean tree-ring width was found in Himalayan Larch in Jilong, whereas Master Larch in Si’er reflected the smallest mean value. Both species presented little climate information in this study. chinese, Potanin, and Tibetan larches are significantly correlated with climate change, implying a huge potential for climate history reconstruction. The elevation of the sampling sites appears to be an important condition for tree-ring growth of larches responding to climate factors.

关键词： Larix Miller tree-ring climate change mean temperature in May

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

Origin of the Red Earth sequence on the northeastern Tibetan Plateau and its implications for regional aridity since the middle Miocene

引用

Science China Earth sciences 2006年第5期49卷 505-517页

作者： WANG Xianyan1,7, LU Huayu1,2. JI Junfeg3, WANG Xiaoyong1,7, ZHAO Jingbo4, HUANG Baochun5 & LI Zhen6 1. SKLLQG, institute of Earth Environment, chinese {2. of sciences. Xi’an 710075, China 2. Department of Urban and Resources sciences. Nanjing University, Nanjing 2.0093, China 3. Department of Earth sciences. Nanjing University, Nanjing 2.0093, China 4. Department of Geography, Shaanxi Normal University, Xi’an 710062. China 5. institute of Geology and Geophysics, chinese {2. of sciences. Beijing 10002., China 6 Department of Geography, qinghai Normal University, xining {12., China 7. Graduate School of the chinese {2. of sciences. Beijing 100039, China 1. SKLLQG Institute of Earth Environment Chinese Academy of Sciences Xi’an 710075 China 7. Graduate School of the chinese academy of {2. Beijing 100039 China 2. Department of Urban and Resources sciences Nanjing University Nanjing 210093 China 3. Department of Earth sciences Nanjing University Nanjing 210093 China 4. Department of Geography Shaanxi Normal University Xi’an 710062 China 5. institute of Geology and Geophysics Chinese Academy of Sciences Beijing 100029 China 6. Department of Geography Qinghai Normal University Xining 810008 China

The Red Earth deposit around xining, northeastern Tibetan Plateau, has beenstudied in terms of soil micro-structure, grain-size distribution, major- and trace-elementchemistry and magne-tostratigraphy. Field investigations indicate that the Red Earth sequenceconsists of 2. visually definable yellow-brown and weakly-developed soils interbedded with reddishstrongly-developed soils, and has a similar structure to the aeolian Red Clay deposit on the chineseLoess Plateau. Grain-size analysis shows that the Red Earth deposit is very fine-grained with anegligible sand fraction ( > 63 μm). Thin-section observations under light microscopy show that thedeposit has a clayey texture and the coarse fraction ( > 10 μm) mainly consists of quartz,feldspar and micas. Pyroxene and hornblende were also observed. This mineralogical composition ofthe coarse fraction is similar to that of the Quaternary loess. In addition, all of the mineralgrains are semi angular semi-angular and are generally finer than 63 μm. There is a good agreementbetween the major and minor trace element chemistry of loess-soil units and the Red Earth *** REE distributions of the loess-soil and the Red Earth deposit are similar in shape, withenriched LREE and fairly flat HREE profiles and a clear negative Eu anomaly. The geochemicalcharacteristics of the Red Earth deposit are also identical to those of upper continental crust,thus indicating a wind-blown origin. Magnetostratigraphic investigation shows that onset of the RedEarth deposition predates 11.4 Ma BP (13.6 Ma at a nearby site). The distribution of the reportedMiocene aeolian loess at Qin''an of the Loess Plateau is still unknown. Our results indicate thatthis aeolian deposit had extended to the northeastern Tibetan Plateau by at least the middleMiocene. The similarity of the element geochemistry between the Red Earth deposit and the overlyingloess shows that they may have similar sources and dynamic transport system, and may indicate thatthe

关键词： Red Earth deposit, Northeastern Tibetan Plateau, aeolian deposit, aridity of Asia, the middle Miocene.

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

STUDY ON THE POLYMER ELECTROLYTES OF(PMA/PEG)n:LiClO_4 SYSTEM

引用

chinese Chemical Letters 1991年第9期2卷 713-716页

作者： Yan LIU (Department of Chemistry,qinghai Medical Colleng,xining,810001) Zeng Liang CAI Chang Ming FANG Yi ZHANG Hai Chun GAO (qinghai institute of salt lakes,chinese academy of Science,xining,810008)

Lithium ion conducting polymer electrolytes were prepared by blending poly(methyl acrylate)[PMA] with poly(ethylene glycol)[PEG]and coordinating them with LiC10_*** highest conductivity was above 1×10^(-6)S/cm at roo... 详细信息

关键词： PEG Li PMA/PEG)n STUDY ON THE POLYMER ELECTROLYTES OF

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

Early tectonic uplift of the northern Tibetan Plateau

引用

Science Bulletin 2005年第15期 108-118页

作者： DAI Shuang1, FANG Xiaomin2.1, SONG Chunhui1, GAO Junping1, GAO Donglin3 & LI Jijun1 1. Key Laboratory of Western China’s Environmental Systems, Ministry of Education of China, and College of Resources and Environment, Lanzhou University, Lanzhou 730000, China 2. institute of Tibetan Plateau Research, chinese {2. of sciences. Beijing 100085, China 3. qinghai institute of salt lakes, chinese academy of sciences. xining 810008, China

The Hexi Corridor is the northmost foreland basin of the Tibetan Plateau and its formation is controlled by the northern marginal fault of Tibet, Altyn Tagh Fault （ATF）-North Qilian Shan marginal Fault （NQF）, and the southern Kuantan Shan-Longshou Shan Fault （KLF）. So its study is important to understanding the mechanism of Tibet formation and its influence on global climate change. The oldest Cenozoic sediments in the Corridor is the Huoshaogou Formation which consists of terrigenous fine conglomerate, sandstone, sandy mudstone and mudstone, depositing in al-luvial to lacustrine and fan delta sedimentary environments. Detailed paleomagnetic measurements of this sequence at Yumen clearly reveal eleven pairs of normal and reversed polarities. Fossil mammals found around the section support that most of the observed polarities can be well correlated with chrons between 13n and 18r of the standard geomag-netic polarity time scale, yielding ages of 40.2.33.35 Ma. The mean declinations of this sequence and its immediately above stratigraphy indicate an 18.3° rapid clockwise rotation of the Hexi Corridor. Since this sequence has been strongly folded and is capped by an angular unconformity, we think that the presence of the thick alluvial fan conglomeration at the bottom of the foreland basin may indicate the initial de-formation and uplift of the northern Qilian Shan. This proc-ess could occur at latest at 40.2.Ma, driven by the faults NQF and KLF that thrust onto the Hexi corridor respectively from its southern and northern margins. These faults are in an early response to the collision of India with Asia, while the unconformable termination and rotation of the Huoshaogou Formation at33.35 Ma indicate other early episode of rapid tectonic deformation and uplift of the northern Tibet.

关键词： Hexi Corridor Huoshaogou Formation Cenozoic mag-netostratigraphy Tibet uplift.

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

X-ray Diffraction Study on the Structure of Super-saturated Aqueous Potassium Metaborate Solutions

X-ray Diffraction Study on the Structure of Super-saturated ...

引用

中国化学会第十五届全国化学热力学和热分析学术会议

作者： Fayan ZHU,Chunhui FANG,Yan FANG,Yongquan ZHOU,Lingdi CAO qinghai institute of {2. lakes,chinese academy of sciences.xining,810008,China

Structure of KBO·RHO(R=5.0 and 10.0) solutions has been performed by a rapid liquid X-ray diffractometry at 2.8 and *** distribution function analysis and model calculation reveal that octahydrated K,with an average ... 详细信息

关键词： Potassium Metaborate X-Ray Diffraction Aqueous Solution RDF

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Environmental geochemistry of arsenic in sediment-water interface of Poyang Lake, China

引用

Acta Geochimica 2006年第S1期 142-143页

作者： Mengxia LIAO1, Tianlong DENG1,2.1 College of Chemistry and Chemical Engineering, Chengdu University of Technology, Chengdu 610059, China2.qinghai institute of {2. lakes, chinese academy of sciences.xining 810008, China

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Solubility Diagrams of Aqueous Na+,Rb+,Cs+ // SO42.-H2.,Rb+,Cs+,Mg2.//SO42.-H2. and Rb+,Cs+ //Cl-,SO42.-H2. Systems at 2.8.15K

Solubility Diagrams of Aqueous Na+,Rb+,Cs+ // SO42--H2O,Rb+,...

引用

第十六届全国化学热力学和热分析学术会议

作者： Bin Hu,Hong-Jun Yang,Bing Li,Yan Yao institute of salt {2.,chinese academy of sciences.xining 810008,

＜正＞Calculation of phase diagrams in multicomponent electrolytes systems from subsystem information are of theoretical as well as of practical *** ion-interaction model advanced by Pitzer et *** been successfully ap... 详细信息

关键词： Solubility diagram salt lake brine Pitzer model Rubidium,Cesium

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

X-ray Diffraction Study on the Structure of Super-saturated Aqueous Potassium Metaborate Solutions

X-ray Diffraction Study on the Structure of Super-saturated ...

引用

中国化学会第十五届全国化学热力学和热分析学术会议

作者： Fayan ZHU Chunhui FANG Yan FANG Yongquan ZHOU Lingdi CAO qinghai institute of {2. lakes chinese academy of sciences.xining 810008 China

Structure of KBO2.RH2.（R=5.0 and 10.0） solutions has been performed by a rapid liquid X-ray diffractometry at 2.8 and *** distribution function analysis and model calculation reveal that

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Study on the Metastable Zone Property of Borax Decahydrate in Different Concentrations of LiCl and Li2.O4 Solutions

Study on the Metastable Zone Property of Borax Decahydrate i...

引用

第十六届全国化学热力学和热分析学术会议

作者： J.Y.Peng~(1,2.,Y.P.Dong~(2.),L.L.Li~(1,2.,Q.F.Meng~2.W.Li~2.1 qinghai institute of {2. lakes,chinese academy of sciences.810008,xining, 2.Graduate University of chinese academy of sciences.100039,Beijing.

＜正＞Supersaturation is the driving force for the nucleation and the crystal growth during a crystallization *** extent of the supersaturation is defined as the metastable zone *** knowledge of metastable zone width ... 详细信息

关键词： metastable zone width borax impurities

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Structure of Aqueous Sodium Metaborate Solution by X-ray Diffraction

Structure of Aqueous Sodium Metaborate Solution by X-ray Dif...

引用

中国化学会第十五届全国化学热力学和热分析学术会议

作者： Yan FANG,Yongquan ZHOU,Fayan ZHU,Lingdi CAO,Chunhui FANG qinghai institute of {2. lakes,chinese academy of sciences.xining 810008,P.R.China

The distribution equilibria and relevant interactions among polyborates in aqueous borate solutions are affected by temperature,pH,total boron concentration,and coexisted *** studies have been done in this field,inclu... 详细信息

关键词： Sodium Metaborate X-Ray diffraction Solution Structure Aqueous Solution RDF

来源： cnki会议评论

在线全文

cnki会议

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：