作者简介：陈京华（1989-）,女,陕西富平人,硕士研究生,主要从事全球变化与水文生态研究.E-mail:fengxinzi0336@163.com
网络出版日期: 2015-07-20
基金资助
国家自然科学基金项目“祁连山植被变化及其对气候响应的敏感性研究”(编号： 41161017);甘肃省自然科学基金计划项目“祁连山地区极端气候变化与气象灾害预警研究”(编号：1107RJZA248)资助
版权
Research on Temporal and Spatial Variation Characteristics of Vegetation Cover in Qilian Mountains from 1982 to 2006
Online published: 2015-07-20
Copyright
基于祁连山地区1982—2006年的GIMMS NDVI数据,采用最大值合成法、均值法、斜率分析法、相关分析法,研究了祁连山植被覆盖的时空变化及其与气候因子的相关性。结果表明:①祁连山植被NDVI总体上自西向东递增,呈现东多西少的分布格局;②25a间植被NDVI变化存在明显的空间差异,表现为中西部地区植被NDVI增加,植被覆盖整体上呈增加趋势;③25a间祁连山不同季节植被NDVI变化存在明显的空间差异,夏季植被NDVI增加面积最大,其次为秋季、春季,植被NDVI减少面积最多的为冬季,而各季节植被NDVI增加区集中分布在青海南山、布哈河流域等地,植被NDVI减少区集中分布在乌鞘岭、冷龙岭及达坂山等地;④祁连山月平均NDVI与气温和降水的相关性极显著,可见气温和降水是影响祁连山植被NDVI变化的主要因子,局部地区密集的人类活动也是影响植被NDVI变化的重要因素。
关键词： GIMMS NDVI; 植被覆盖; 时空变化; 祁连山
陈京华 , 贾文雄* , 赵珍 , 张禹舜 , 刘亚荣 . 1982—2006年祁连山植被覆盖的时空变化特征研究[J]. 地球科学进展, 2015 , 30(7) : 834 -845 . DOI: 10.11867/j.issn.1001-8166.2015.07.0834
Based on GIMMS NDVI data of Qilian Mountains region during 1982-2006, using the maximum synthesis, mean method, slope analysis and correlation analysis, the spatial and temporal changes of vegetation cover and its correlations with climatic factors were studied in Qilian Mountains. The results showed that: ①Vegetation NDVI of Qilian Mountains increases from west to east in general, showing the distribution pattern of much more vegetation in east regions than in west regions; ②Vegetation NDVI of Qilian Mountains has generally increased in the past twenty five years, but there are obvious spatial differences, especially vegetation NDVI of middle and east regions increase obviously; ③There have been obvious differences on spatial variation of seasonal NDVI in the past twenty five years in Qilian Mountains, and the increased area of vegetation NDVI is the largest in summer, followed by autumn, spring, but the most reduced area of vegetation NDVI is in winter. The regions of increased vegetation NDVI concentrate on southern mountain of Qinghai Province and in Buha River Basin, while the regions of reduced vegetation NDVI concentrate on Wushaoling, Lenglongling and Daban mountain in each season; ④The correlations between monthly average vegetation NDVI and temperature and precipitation are very significant, which indicates that temperature and precipitation are the main factors affecting the change of vegetation NDVI in Qilian Mountains, but intensive human activities are also important factors affecting the change of vegetation NDVI in some areas.
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