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首页> 外文会议>International Conference on Agro-Geoinformatics >Spatio-temporal change of vegetation NDVI and its relations with regional climate in Northern Shaanxi Province since implementation of returning farmland to forests project
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Spatio-temporal change of vegetation NDVI and its relations with regional climate in Northern Shaanxi Province since implementation of returning farmland to forests project

机译：退耕还林工程实施以来陕北植被NDVI的时空变化及其与区域气候的关系

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Correlation analysis, spatial statistical and overlay analysis are adopted to investigate spatial distribution pattern and variation characteristics of vegetation NDVI, and to analyze the relations between vegetation NDVI and regional climate from the views of temperature and precipitation respectively. It is found from the research that the vegetation NDVI change undergoes three stages: relatively-rapid growth stage from 2000 to 2002, slightly fluctuating stage from 2003 to 2005, and steady growth stage from 2006 to 2010. Vegetation NDVI change varies in different space: in loess hilly area in the central and eastern region of Northern Shaanxi Province, the vegetation cover increased significantly.in the wind drift sand area in the northern region, the change in vegetation cover was small. in low-mountain hilly area in the southern region, the vegetation cover slightly decreased. The precipitation was going on a declining curve from 2000 to 2010, while the temperature was undergoing an upward trend in the same period, but this dry-heating climate has been slightly restrained over the past years. The vegetation cover is positively related to precipitation and temperature in some areas,while in other areas it is negative. The linear relation is not obvious.
机译：采用相关分析，空间统计和覆盖分析的方法研究植被NDVI的空间分布格局和变化特征，分别从温度和降水的角度分析植被NDVI与区域气候的关系。从研究中可以发现，植被NDVI的变化经历了三个阶段：2000-2002年的相对快速生长期，2003-2005年的小幅波动阶段以及2006-2010年的稳定生长期。植被NDVI的变化在不同的空间上是不同的：陕北中东部黄土丘陵区植被盖度明显增加。北部风沙区植被盖度变化较小。在南部低山丘陵地区，植被覆盖度略有下降。从2000年到2010年，降水量呈下降趋势，而同期温度却呈上升趋势，但这种干热气候在过去几年中受到了一定程度的限制。在某些地区，植被覆盖与降水和温度成正相关，而在另一些地区，则与植被成负相关。线性关系不明显。

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