Introduction
植被的动态通常是指在植被组成和结构不发生显著改变情况下的周期性变化,如植被的物候变化、植被覆盖度的变化、初级生产力的变化等。植被的演变通常是指植被组成和结构发生显著改变情况下的非周期性变化或长期变化,主要变现为植被的演替和植被带的移动等。
植被覆盖度的三个半经验公式:
\[f = 1 - {\left( {\frac{{NDV{I_\infty } - NDVI}}{{NDV{I_\infty } - NDV{I_S}}}} \right)^{0.6175}}\]
where NDVI∞ and NDVIS are the NDVI for vegetation with infinite LAI and bare soil, respectively.
\[f = {\left( {\frac{{NDVI - NDV{I_S}}}{{NDV{I_\infty } - NDV{I_S}}}} \right)^2}\]
\[f = \frac{{NDVI - NDV{I_S}}}{{NDV{I_\infty } - NDV{I_S}}}\]
Reference
[1] 陈效逑, 王恒. 1982~2003年内蒙古植被带和植被覆盖度的时空变化[J]. 地理学报, 2009, 64(1): 84~94.
[2] Zhangyan Jiang, Alfredo R. Huete, Jin Chen, et al.. Analysis of NDVI and scaled difference vegetation index retrievals of vegetation fraction[J]. Remote Sensing of Environment, 2006, 101(3): 366~378.
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