Figure 2
From: The pattern, change and driven factors of vegetation cover in the Qin Mountains region
Change trend (a) and abrupt point analysis (b) of maximum NDVI in growing seasons in Qin Mountains (1987–2018). The change trend of maximum NDVI in growing seasons extracted from Google Earth Engine (GEE). The points that transformation from upward to downward has been considered as the abrupt change of data sequence, and the “Statistics Value” in the y-axis refer to the accumulated departure. Besides, considered the implementation of “Grain For Green Project” in 1999 in China, we divided the whole study time into three periods: 1987–1999, 1999–2006, 2006–2018.
