Changes of NDVI and Its Responses to Temperature and Precipitation on Loess Plateau over Last Ten Year

Chen An-an; Sun Lin; Hu Bei; Luo Long-cheng; Wang Jun

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Changes of NDVI and Its Responses to Temperature and Precipitation on Loess Plateau over Last Ten Year

- Changes of NDVI and Its Responses to Temperature and Precipitation on Loess Plateau over Last Ten Year
- Bulletin of Soiland Water Conservation Vol. 30, Issue 5, Pages: 215-219(2011)
- 作者机构：
  
  西北大学城市与环境学院
- 作者简介：
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- Published：2011
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Chen An-an, Sun Lin, Hu Bei, et al. Changes of NDVI and Its Responses to Temperature and Precipitation on Loess Plateau over Last Ten Year[J]. Bulletin of Soiland Water Conservation, 2011, 30(5): 215-219.
DOI：

Chen An-an, Sun Lin, Hu Bei, et al. Changes of NDVI and Its Responses to Temperature and Precipitation on Loess Plateau over Last Ten Year[J]. Bulletin of Soiland Water Conservation, 2011, 30(5): 215-219. DOI：

摘要

植被变化及其对气候的响应是当前全球变化研究的关键领域之一。基于SPOT-VGTNDVI数据集和黄土高原气象资料

应用最大化合成法和Kriging插值等地理空间分析方法

对黄土高原地区植被变化特征及其对气温和降水的响应过程进行了多时间尺度分析。结果表明

1999—2008年期间黄土高原地区植被覆盖整体呈上升趋势

线性增速为9.9%/10a

NDVI在旬、月和季尺度的变化曲线均呈单峰型

8月份达到最大值

2月为全年的最低值。研究黄土高原地区植被NDVI对气温和降水变化响应的最优尺度为月尺度。黄土高原地区NDVI在旬、月尺度上与温度的相关程度强于降水

而季尺度上与降水的相关程度强于气温。

Abstract

Land cover change and its response to climatic variations is an essential part of researches on global climate change.Based on SPOT normalized difference vegetation index(NDVI)

the land cover changes of the loess plateau during the last ten years were analyzed at multi temporal scales using several geo-statistical methods

as well as the response of NDVI to the precipitation and temperature.The results show that the vegetation cover increased substantially during 1999—2008.All the NDVIs at the scales of 10-day

month and season showed single-peak curves with the maximum in August and the minimum in February.Monthly scale was found the appropriate scale for the study addressing the response of NDVI to precipitation and temperature on the loess plateau.The responses of NDVI to temperature and precipitation varied at different scales on loess plateau.The coefficients of correlations between NDVI with temperature were greater than that with precipitation at 10-day or month scale

while lower at season scale.

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