|
|||||
|
|
| 中国北方荒漠区降水空间结构型及变异性研究 | |
| 引用本文： | 徐利岗,梁川,周宏飞,吴洪相.中国北方荒漠区降水空间结构型及变异性研究[J].中国沙漠,2010,30(6):1433-1441. |
| 作者姓名： | 徐利岗 梁川 周宏飞 吴洪相 |
| 作者单位： | 1. 中国科学院,新疆生态与地理研究所,新疆,乌鲁木齐,830011;四川大学,水利水电学院,四川,成都,610065;宁夏水利科学研究所,宁夏,银川,750021 2. 中国科学院,新疆生态与地理研究所,新疆,乌鲁木齐,830011 3. 宁夏水利科学研究所,宁夏,银川,750021 4. 宁夏水利厅,宁夏,银川,750001 |
| 基金项目： | 国家重点基础研究发展计划项目,国家自然科学基金重点项目,中国科学院重要方向项目 |
| 摘 要： | 依据中国北方荒漠区35个站点1951—2005年降水资料,运用(旋转)经验正交函数分解(EOF/REOF)、主成分分析、分形理论及地统计学等方法探讨了北方荒漠区降水空间结构型及空间变异性。结果表明,降水空间分布以"相间复杂"型和"东西相反"型为主(对总体方差贡献分别为35.8%和20.4%);降水趋势自西向东逐渐减弱,有西部增加、中部地区小幅增大而东部地区趋于干旱的可能。新疆地区对全区降水波动方差贡献率达70.4%。新疆地区及青海-河西-河套地区变异函数曲线符合球状模型,内蒙古高原中东部地区符合指数模型;随机因素引起的空间异质性占0.01%～1.62%。20世纪50年代和70年代青海-河西-河套地区变异性最强,新疆地区次之,内蒙古高原中东部地区最弱,90年代以后新疆地区最强,内蒙古高原中东部地区次之,青海-河西-河套地区最弱。新疆地区、青海-河西-河套地区及内蒙古高原中东部地区降水分别在南北方向、东西方向及东北-西南方向异质性最强。 |
| 关 键 词： | 中国北方荒漠区 降水 空间结构型 空间变异性 EOF/REOF Kriging |
| 收稿时间： | 2009-11-22 |
| 修稿时间： | 2010-2-15 |
Spatial Structural Patterns and Variability of Precipitation over the Desert Region of Northern China |
|
| XU Li-gang,LIANG Chuan,ZHOU Hong-fei,WU Hong-xiang.Spatial Structural Patterns and Variability of Precipitation over the Desert Region of Northern China[J].Journal of Desert Research,2010,30(6):1433-1441. | |
| Authors: | XU Li-gang LIANG Chuan ZHOU Hong-fei WU Hong-xiang |
| Institution: | 1.Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China; 2.College of Water Resource &; Hydropower, Sichuan University, Chengdu 610065, China; 3.The Scientific Research Institute of the Water Conservancy of Ningxia, Yinchuan 750021, China; 4.Water Resources Office of Ningxia Hui Autonomous Region, Yinchuan 750001, China |
| Abstract: | By means of empirical orthogonal function(EOF), rotated empirical orthogonal function(REOF), principal component analysis, fractal theory and geostatistical approach, the spatial distribution pattern, primary effect factors and spatial variability of precipitation are analyzed based on the monthly precipitation data during 1951—2005 for 35 weather stations in desert regions of northern China. Results indicate that: (1) Spatial distribution pattern of precipitation is primarily "complex middle type" and "east-west reversed type" (with the contribution rate of 35.8% and 20.4% to overall variance, respectively). The change trend of precipitation is weakened from west to east. It is possible that the precipitation will increase over the west region, increase in the central region by small range, but get drought in the eastern region. (2) The semivariogram of precipitation fits spherical model in Xinjiang area and Qinhai-Hexi-Hetao Region, and fits exponential model in the mid-east of Inner Mongolia Plateau. The arising of precipitation spatial heterogeneity with 0.01%~1.62% is owing to random factors. (3) In 1950s and 1970s, the spatial variation of precipitation in Qinhai-Hexi-Hetao Region is the biggest, followed by Xinjiang area, and the mid-east of Inner Mongolia Plateau area is the minimum. But since entering 1990s, the spatial variation of precipitation is the biggest in Xinjiang area, Qinhai-Hexi-Hetao Region is the minimum. The precipitation variability is the strongest in north-south direction (0) in Xinjiang area, northeast-southwest (45) in Qinhai-Hexi-Hetao Region, and east-west direction (90) in the mid-east of Inner Mongolia Plateau area. |
| Keywords: | desert regions in northern China precipitation spatial structural patterns spatial variability EOF/ REOF Kriging interpolation method |
| 本文献已被 CNKI 万方数据 等数据库收录！ | |
| 点击此处可从《中国沙漠》浏览原始摘要信息 | |
| 点击此处可从《中国沙漠》下载免费的PDF全文 | |