检索结果-南通市图书馆

reconstructing mean maximum temperature of growing season from the maximum density of the Schrenk Spruce in Yili,Xinjiang,China

引用

Chinese Science Bulletin 2009年第13期54卷 2300-2308页

To study the historical temperature variation in Yili of Xinjiang,the tree-ring chronologies of maximum density(MXD) and tree-ring width(TrW) were established with the Schrenk Spruce(Picea schrenkiana *** Mey) collected from six sites to analyze the characteristics and ability of response to climate *** results suggest that the MXD chronology of the Schrenk Spruce from different sampling sites responded to climate change well and were positively correlated with the mean maximum temperature and the mean temperature from April to August in the study *** mean maximum temperature anomaly from April to August,spanning the years from 1848 to 2000,was reconstructed by three MXD chronologies which were selected by stepwise *** reconstructed function was stable and explained 5..2% of the *** reconstructed results indicated a cold span of 15. years in spring and summer from the beginning of the 195.s to the beginning of the 1970s in the Yili *** strongly increasing tendency was detected in the mean maximum temperature anomaly from April to August during this reconstructed period.

关键词：平均最高气温伊犁谷地最大密度云杉胡杨生长季节新疆树木年轮宽度

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

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

引用

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, Chinese Academy of Sciences, Beijing 100101, China 2 institute of Tibetan Plateau research, Chinese Academy of Sciences, Beijing 100085. China 3 institute of desert and meteorology, China {5. administration, Urumqi 830002, China 4 Graduate University of Chinese Academy of Sciences, Beijing 100049, China 5.institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, Beijing 100044, China 6 School of Life and Geography Sciences, Qinghai Normal University, Xining 810008, 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

An Examination of Boundary Layer Structure under the Influence of the Gap Winds in Urumqi,China,during Air Pollution Episode in Winter

An Examination of Boundary Layer Structure under the Influen...

引用

强化科技基础推进气象现代化——第29届中国气象学会年会

作者： Xia Li institute of desert meteorology,Urumqi,China meteorology {5.,China LAGEO,institute of Atmospheric Physics,Chinese Academy of Sciences,Beijing,China Mailing address:No.46,Jianguo road,Urumqi,Xinjiang,China,830002 Xiangao Xia LAGEO,institute of Atmospheric Physics,Chinese Academy of Sciences,Beijing,China Yu Xin Xinjiang Climatic Center,Urumqi,China Yufen Ma institute of desert meteorology,Urumqi,China meteorology {5.,China Jing Yang Xinjiang meteorological Science and Technological Service Center Jinglin Li Xinjiang Information Center of Developing Agriculture Network,Urumqi,China Xinghua Yang institute of desert meteorology,Urumqi,China meteorology {5.,China

Tethered-sonde measurements of atmospheric profiles were performed at Urumuqi,capital of the Xinjiang Uyghur Autonomous region of China,from 29 December 2008 to 14 January *** data were used to examine the boundary layer structure during this severe air pollution *** evolution of local wind flow near Urumqi was simulated using the fifth-generation Pennsylvania State University-NCAr Mesoscale Model(MM5..Measurements from Operational radiosonde data showed that a southeasterly elevated low-level jet often intruded upon Urumqi through the middle Tianshan Mountain pass to the south of the *** tethered-sonde measurements showed that calm and northwesterly winds prevailed near the surface in Urumqi,while the southeasterly winds of relatively higher speed were dominant above 00 *** temperature inversion and humidity inversion frequently occur during day and *** inversion intensity could sharply rise as the stronger elevated southeasterly gales(ESEGs) *** simulations showed that the winds near the surface around Urumqi remained calm during nighttime and developed toward the mountains during *** cool air flow in the basin confronted the southeasterly winds from the pass in the lower layer,they formed a convergence line around Urumqi city,which was not favor for dilution of air pollutants.

关键词： middle Tianshan Mountain pass gap wind elevated southeasterly gale (ESEG) tethered-sonde severe air pollution episodes

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

三工河流域40年来气温、降水变化特征分析

引用

水土保持研究 2005年第6期12卷 54-57页

作者：刘新春杨金龙杨青中国气象局乌鲁木齐沙漠气象研究所乌鲁木齐830002 新疆大学资源与环境科学学院乌鲁木齐830046

分析了三工河流域40 a来气温、降水变化的基本特征,所得的主要结果如下:(1)阜康、天池的气温和降水的变化有线性增加的趋势,气候由暖干向暖湿转变。(2)阜康、天池各季平均气温的变幅以冬季最大,夏季最小;各季的降水以夏季最大,冬季最小... 详细信息

分析了三工河流域40 a来气温、降水变化的基本特征,所得的主要结果如下:(1)阜康、天池的气温和降水的变化有线性增加的趋势,气候由暖干向暖湿转变。(2)阜康、天池各季平均气温的变幅以冬季最大,夏季最小;各季的降水以夏季最大,冬季最小,总体趋势是温度升高、降水增多。(3)自60年代来气温基本上呈上升趋势,每年代增幅都在0.3℃以上;降水没有气温变化明显,但降水量在增加。(4)阜康的气温和降水分别具有5.0年左右和3.3年左右的周期;天池的气温具有2.7年左右的主周期和8年左右的次周期,降水则存在2.9年左右的主周期和4.4年左右的次周期。

关键词：气温降水气候变化三工河流域

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

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

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：