|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | 1960-2013年南北疆风速变化特征分析显示文摘利用较为均匀分布在新疆的45个气象站1960-2013年平均风速数据,通过气候趋势分析、气候突变分析、Morlet小波分析、Pearson相关分析等方法,研究近50 a来南北疆平均风速变化特征,结果表明:(1)1960-2013年南北疆地区年平均风速分别以0.15 m·s-1·(10 a)-1和0.14 m·s-1·(10 a)-1的速率显著降低,1960-1990年南北疆年均风速分别以0.21 m·s-1·(10 a)-1和0.18 m·s-1·(10 a)-1速率降低;1991-2013年北疆以0.01 m·s-1·(10 a)-1的速率下降,而南疆却以0.17 m·s-1·(10 a)-1的速率上升,各季节风速变化趋势与年序列相似。(2)四季中,南北疆的年递减率均是夏季最为显著,北疆是冬季变化不明显,而南疆其余各季节相差不大。(3)从空间分布上显示,北疆各站点总体较南疆明显,低海拔区递减幅度较大。(4)风速的长期变化具有一定的突变性,南北疆的平均风速均在1980年前后出现明显的突变点,从各季节平均风速来看,北疆春、夏、秋季突变出现的时间稍早于冬季,南疆春季突变出现的时间稍早于夏、秋和冬季。(5)Morlet小波分析结果显示,南北疆风速变化均存在4 a、8 a及15~20 a左右的变化周期,春夏秋冬各季节表现出强弱不一致,体现出季节性变化。(6)城市化发展对风速的变化产生了一定影响,但不是风速显著下降的主要原因,大气环流变化和气候变暖才是造成风速减小的可能原因。 | 何毅 杨太保 陈杰 冀琴 王凯 | 2015 | 干旱区地理2015，38，2： | 40 |
| 2 | 南方丘陵山地带NDVI时空变化及其驱动因子分析显示文摘本文利用MODIS归一化植被指数(Normailized Difference Vegetation Index,NDVI)数据对南方丘陵山地带2000-2010年间植被覆盖的年际动态、季相变化和空间差异进行研究,并结合气象因子和土地利用/覆被数据分析植被覆盖变化的原因。研究表明:南方丘陵山地带植被NDVI值较高,属高植被覆盖区。2000-2010年间植被NDVI整体呈上升趋势,但并不显著(p=0.45)。从不同植被类型的季相变化来看,草地的变化幅度最大,其次为灌丛,森林植被变化幅度最小,生长峰值主要出现在8、9月份。植被覆盖变化存在显著的空间差异,封山育林、退耕还林还草生态恢复区和石漠化综合治理区的植被覆盖度显著提高,城镇化迅速发展区植被明显退化。植被覆盖变化是气候和人类活动共同作用的结果。植被覆盖年际变化与气候因子年际变化的相关系数区域分异比较明显。降水量对植被覆盖的影响主要表现在对植被生长年内变动的控制,大部分植被生长对降水存在1个月滞后现象。农业生产的提高、城市化进程的加速及生态建设的重视等人类活动是影响植被覆盖变化空间差异的另一重要因素。 | 王静 王克林 张明阳 段亚锋 | 2014 | 资源科学2014，36，8： | 30 |
| 3 | 生态建设对陕北植被变化的影响分析显示文摘运用趋势分析法及相关系数检验法,分析了陕北大规模生态建设工程实施以来植被NDVI变化趋势,检验了NDVI变化与降雨量、温度以及造林面积之间的关系。结果表明:陕北大部分地区植被明显转好(通过α=0.05检验),尤其是丘陵沟壑农耕区植被改善最为显著,12 a间NDVI净增0.123 3,提高24.90%,南部森林植被区,NDVI净增最低,只有0.045 0,增加率5.56%。NDVI变化格局与生态退耕格局在空间上呈现高度吻合的特征。NDVI变化与降雨量和温度没有显著的回归关系(R2<0.15),但与造林率(造林面积占县土地面积的比)回归关系显著(R2=0.560 8),说明降雨量、温度变化对陕北NDVI变化没有明显的影响,而以退耕和植树造林为主的生态建设才是导致NDVI变化的主导因素。结论认为过去12 a的生态建设明显促进了陕北植被的恢复,改善了区域环境状况。 | 李旺君 吕昌河 | 2014 | 干旱区地理2014，37，2： | 5 |
| 4 | Aridity trend and response to vegetation restoration in the loess hilly region of northern Shaanxi Province显示文摘处于干燥湿的条件检测变化趋势能为开发战略措施减轻全球温暖的影响提供信息,特别地在干燥区域。作为一个盒子区域在黄土高原上拿北 Shaanxi 的多山的区域,这研究在 19812012 期间分析了干旱变化的趋势,并且探索了在 1999 实现的 Grain-for-Green (GFG ) 节目支持的植被恢复的效果。结果显示在这个区域的干旱被 0.88% 非显著地在 19812012 期间每年增加,显示出一个弄干的趋势。这个弄干的趋势和振幅被 GFG 节目支持的植被恢复的影响改变,基于二调查结果。第一是干旱变化趋于在 19811999 期间增加当它转弯了在 20002012 期间减少时,与从 2.45% ~ 1.06% 改变的地区性的吝啬的相对变化率。这区别在黄土溪谷区域是更显著的,在植被更显然被改进的地方。第二是由 EVI 显示了的吝啬的植被范围在县水平每年增加了 0.90% ~ 4.32% ,当干旱在 20002012 期间每年在 0.14% ~ 2.32% 减少了时。用吝啬的县数据的回归分析显示变化干旱评价,在干旱衰落的一半附近说明那是否定地与有决心的系数的 EVI 的有关(R < 啜 class= “ a-plus-plus ” > 0.56 的 2 ) 被 EVI 变化解释。这效果的机制是复杂的,但是植被改进导致的风速度衰落能是一个重要贡献者,这被发现。这个区域在 19812012 期间变得更干燥,这被结束,但是 eco 恢复减少了弄干的速度。然而,这个结论涉及无常,并且进一步的学习基于实验被需要证实支持 GFG 的植被恢复的效果。 | LI Wangjun LU Changhe | 2015 | Journal of Geographical Sciences2015，25，3： | 4 |
| 5 | 地形位指数模型改进及其在植被覆盖评价中的应用显示文摘地形作为影响植被覆盖的重要因素,对植被恢复评价以及生态修复规划意义重大。地形位作为测度地形因子综合效应的指标,具有单一地形因子难以比拟的优势。然而,现有地形位指数算法以整个研究区为参照,未考虑空间异质性,难以反映植被生长的局部环境特征。基于地理学第三定律对地理环境相似的强调,融合“空间位置邻近”和“环境特征相似”,对传统地形位模型进行改进:①引入局部窗口算法,以突出局部地形特征;②在不同生境因子组合下测算地形位指数,以排除环境差异对地形位作用的干扰。案例研究表明,新模型有效提升了地形位指数对植被覆盖水平的解释力度;当考虑生境因子组合,且采用最优窗口时,局部窗口地形位指数与植被覆盖度之间的相关性最高。此外,通过观察不同生境组合下的地形位指数发现,在高热少水阴坡和高热少水阳坡条件下,植被覆盖度与局部窗口地形位指数具有更高相关性;可见,越是水资源相对匮乏区域,植被覆盖对局部窗口地形位的响应越敏感。本文有望为植被恢复评价与规划提供新的指标。 | 张玉 张道军 | 2022 | 地理学报2022，77，11： | 3 |
| 6 | Coupling between the Grain for Green Program and a household level-based agricultural eco-economic system in Ansai,Shaanxi Province of China显示文摘The implementation of the Grain for Green Program(GGP)has changed the development track of the agricultural eco-economic system in China.In response to the results of a lag study that investigated the coupling between the GGP and the agricultural eco-economic system in a loess hilly region,we used a structural equation model to analyze the survey data from 494 households in Ansai,a district of Yan’an City in Shaanxi Province of China in 2015.The model clarified the direction and intensity of the coupling between the GGP and the agricultural eco-economic system.The coupling benefits were derived through linkages between the program and various chains in the agricultural eco-economic system.The GGP,the agroecosystem of Ansai and their potential coupling effects were in a state of general coordination.The agroecosystem directly affected the coupling effect,with the standardized path coefficient of 0.87,indicating that the agroecosystem in Ansai at this stage provided basic material support for the coupling between the GGP and the agricultural eco-economic system.The direct path coefficient of agroeconomic system impacted on the coupling effect was-0.76,indicating that partial contradictions occurred between the agroeconomic system and the coupling effect.Therefore,although the current agroecosystem in Ansai should be provided sufficient agroecological resources for the benign coupling between the program and the agricultural eco-economic system,agricultural development failed to effectively transform agroecological resources into agricultural economic advantages in this region,which resulted in a relative lag in the development of the agricultural economic system.Thus,the coupling between the GGP and the agricultural eco-economic system was poor.To improve the coupling and the sustainable development of the agricultural eco-economic system in cropland retirement areas,the industrial structure needs to be diversified,the agricultural resources(including agroecological resources,agricultural economic resources and agricultural social resources)need to be rationally allocated,and the chain structure of the agricultural eco-economic system needs to be continuously improved. | LI Yue WANG Jijun HAN Xiaojia GUO Mancai CHENG Simin QIAO Mei ZHAO Xiaocui | 2020 | Journal of Arid Land2020，12，2： | 2 |
| 7 | Application of the InVEST model for assessing water yield and its response to precipitation and land use in the Weihe River Basin, China显示文摘With realizing the importance of ecosystem services to society, the efforts to evaluate the ecosystem services have increased. As the largest tributary of the Yellow River, the Weihe River has been endowed with many ecological service functions. Among which, water yield can be a measure of local availability of water and an index for evaluating the conservation function of the region. This study aimed to explore the temporal and spatial variation of water yield and its influencing factors in the Weihe River Basin(WRB), and provide basis for formulating reasonable water resources utilization schemes. Based on the InVEST(integrated valuation of ecosystem services and tradeoffs) model, this study simulated the water yield in the WRB from 1985 to 2019, and discussed the impacts of climatic factors and land use change on water yield by spatial autocorrelation analysis and scenario analysis methods. The results showed that there was a slight increasing trend in water yield in the WRB over the study period with the increasing rate of 4.84 mm/10a and an average depth of 83.14 mm. The main water-producing areas were concentrated along the mainstream of the Weihe River and in the southern basin. Changes in water yield were comprehensively affected by climate and underlying surface factors. Precipitation was the main factor affecting water yield, which was consistent with water yield in time. And there existed significant spatial agglomeration between water yield and precipitation. Land use had little impact on the amount of water yield, but had an impact on its spatial distribution. Water yield was higher in areas with wide distribution of construction land and grassland. Water yield of different land use types were different. Unused land showed the largest water yield capacity, whereas grassland and farmland contributed most to the total water yield. The increasing water yield in the basin indicates an enhanced water supply service function of the ecosystem. These results are of great significance to the water resources management of the WRB. | WU Changxue QIU Dexun GAO Peng MU Xingmin ZHAO Guangju | 2022 | Journal of Arid Land2022，14，4： | 2 |
您所在的机构暂未开通此部分的功能，请联系管理员