【摘 要】
：
This study examines spatial and temporal changes in 16 extreme temperature indices at 37 weather stations in Xinjiang and their associations with changes in climate means during 1961-2008.Linear regre
【出 处】
：
Sciences in Cold and Arid Regions
论文部分内容阅读
This study examines spatial and temporal changes in 16 extreme temperature indices at 37 weather stations in Xinjiang and their associations with changes in climate means during 1961-2008.Linear regression analyses reveal that significant increasing tr
其他文献
利用美国冰雪资料中心(National Snow and Ice Data Center)提供的前苏联1948~1994年逐日积雪深度资料,定义了冬季雪深增量的概念,探讨了欧亚大陆秋末雪深、冬季雪深、冬季雪深增量的时空演变规律,通过比较分析三者的异常变化特征,揭示了三者之间可能存在的联系。经验正交函数分解(EOF)结果表明:欧亚大陆冬季雪深、冬季雪深增量的第一模态的空间分布特征均为大致以50°N为
自隋唐以来,广大东南地区社会经济发展迅速,其在全国的区位优势日益明显。东南地区的崛起,除了人口大迁移带来的经济大发展外,与其优越的地理环境密切相关。关于历史时期东南地区的地理环境与社会发展的关系,一直是学界关注的热点问题,近期出版的吴洲先生的《唐代东南的历史地理》(中国社会科学出版社2011年出版)一书是作者对这一课题持久关注与深入研究的成果。该书40余万字,内容涉及唐代东南地区的地质地貌、山川形
甘青地区齐家文化较前期的马家窑分布北界南缩,整体海拔变低,是对4 ka B.P.事件中气候干旱和气温降低的响应。齐家遗址较马家窑分布更为稀疏,遗址最短距离变大,对河流的依赖性降低,这一变化与齐家文化时期畜牧业比重的增加相关。密度分析表明4 ka B.P.前后,马家窑聚落的单核心凝聚模式演变为齐家的多核心模式,极端气候事件使得农业生产能力和资源状况恶化,部落间战争频发,战争可能对父权制度的形成和冶炼
We studied a soil seed bank in the Stipa breviflora desert steppe under three grassland management systems,namely continuous grazing,rotational grazing,and no grazing,from 1999 until 2007.The germinab
对采自中国东部亚热带地区的浙江天目山、江西庐山及江苏南京紫金山地区的金钱松(Pseudolarix kaemp feri)、冷杉(Abiesfab ricraib)及马尾松(Pinus massoniana)树轮,分别测定它们不同方位10 a、20 a及3 a树轮δ13C序列,探讨不同树种树轮δ13C存在的方位差异与年际变化普遍性。结果表明,在中国东部亚热带地区,树轮δ13C方位差异与年际变化存在
This paper obtained a set of consecutive and long-recorded observational snow depth data from 51 observation stations by choosing,removing and interpolating original observation data over the Tibetan
The content characteristics of 16 elements(Al,Ca,Cr,Cu,Fe,K,Li,Mg,Mn,Mo,Na,Ni,P,Pb,Sr,and Zn) in 23 plant species collected from the Qinghai-Tibetan Plateau permafrost region were investigated using I
Using series of daily average temperature observations over the period of 1961-1999 of 701 meteorological stations in China,and simulated results of 20 global climate models(such as BCCR_BCM2.0,CGCM3T
Based on an Ensemble Prediction System with the BGM method on the regional numerical prediction model AREM,Static State Perturbation(SSP,including Initial Random Perturbation and Perturbation Restrict
Under the condition of freeze-thaw cycles,two types of rocks(granite and andesite),used as slope protection for the Qinghai-Tibet Railway,were tested according to the special climatic conditions in th