Spatio-Temporal Changes of Vegetation Based on MODIS NDVI Data during 2001-2014 in Hainan, China
文献类型: 外文期刊
第一作者: Luo, Hongxia
作者: Luo, Hongxia;Wang, Lingling;Fang, Jihua;Li, Yuping;Li, Hailiang;Li, Maofen
作者机构:
关键词: the modulus of change vector;Hainan island;Vegetation cover
期刊名称:2015 4TH INTERNATIONAL CONFERENCE ON ENERGY AND ENVIRONMENTAL PROTECTION (ICEEP 2015)
ISSN:
年卷期: 2015 年
页码:
收录情况: SCI
摘要: Access to information of changing vegetation cover in time and accurately is critical in revealing vegetation cover time-space change laws and making assessment of global and local ecological environment change. In this paper, Differential method and MVC is used to study vegetation dynamic changes in Hainan by MODIS NDVI data from 2001 to 2014. Modulus of change vector was adopted to fix the change intensity and stability of vegetation. The change intensity can describe by the modulus of change vector mean, and the stability of vegetation can be represented with the modulus of change vector standard deviation. As a result, for the past 14 years, the overall vegetation cover increased linearly in Hainan (R-2=0.7111). The city with the biggest change intensity in vegetation cover is Wanning (the modulus of change vector mean is 0.989), while the smallest Dongfang (the modulus of change vector mean is 0.691). The city with the highest stability in vegetation cover is is Ding'an Country (the modulus of change vector standard deviation is 0.17), while the least stability Wuzhishan (the modulus of change vector standard deviation is 0.278). It shows that the overall vegetation growth situation run smooth, benefited from favorable natural conditions in Hainan, which incidated that along with the construction of the international tourism island, the vegetation cover changed a lot due to human activity.
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