| 近25年山西植被指数时空变化特征分析 |
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| 引用本文： | 武永利,栾青,赵永强,王志伟. 近25年山西植被指数时空变化特征分析[J]. 生态环境, 2008, 17(6) |
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| 作者姓名： | 武永利 栾青 赵永强 王志伟 |
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| 作者单位： | 山西省气候中心,山西,太原,030006 |
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| 基金项目： | 山西省科技攻关项目 |
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| 摘 要： | 在遥感及地理信息系统技术支持下,利用1982-2006年8 km×8 km的NASA/GIMMs植被指数(NDVI)数据,采用多种方法分析了山西高原近25 a来植被指数的时空动态变化规律.结果表明:①25 a来,山西省年均NDVI基本在0.33上下呈波动中上升趋势,表明山西高原植被活动在增强;②从季节变化来看,山西省春季和秋季的植被都在增加,冬季上升趋势较弱,夏季变化很小,呈现极弱的递减趋势;③空间上,植被指数南部好于北部,山区好于平原;④从植被变化趋势图中也可以看出植被呈现总体变好趋势,其中北部变好趋势明显,其次是南部;⑤植被年际变化表现出较为一致的变化趋势以及较为明显中部和南北反相的局地变化特征.
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| 关 键 词： | 山西 时空变化 |
Analyses on spatial-temporal change characteristics of NDVI during the past 25 years in Shanxi |
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| Wu Yongli,Luan Qing,Zhao Yongqiang,Wang Zhiwei. Analyses on spatial-temporal change characteristics of NDVI during the past 25 years in Shanxi[J]. Ecology and Environmnet, 2008, 17(6) |
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| Authors: | Wu Yongli Luan Qing Zhao Yongqiang Wang Zhiwei |
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| Affiliation: | Wu Yongli,Luan Qing,Zhao Yongqiang,Wang Zhiwei Climate Center of Shanxi Province,Taiyuan 030006,China |
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| Abstract: | The vegetation spatial-temporal change characters were analyzed in Shanxi, using the NASA/GIMMS(Global Inventory Modeling and Mapping Studies) NDVI data set, which was collected at a spatial resolution of 8 km and 15 days interval, for the pe- riod from 1982 to 2006.The result showed that: in the past 25 years, the annual average NDVI were around 0.33, and it follows a fluctuating ascending trend. The NDVI variation trends of spring and autumn were increased, the trends of winter were increased infirmness, ... |
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| Keywords: | GIMMS NDVI |
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