Monotonic Greening Tend and Browning Trend on the Loess Plateau from 2006 to 2015

The Loess Plateau(LP) is one of the regions with the most vulnerable environment and the most serious ecological degradation and soil erosion in China. The paper used the 16-day MODIS NDVI time series spanning 2006 to 2015, and employed Empirical Mode Decomposition (EMD) combined with Mann-Kendall (M-K) significance test to detect the monotonic trend of vegetation in the LP. The result showed that the vegetation in the LP exhibited a “greening” trend in general. the area with “greening” and browning trend accounting for 80.94% and 14.87%, respectively, and area without significant change accounting for 4.46%.