Qinghai Province (Tibetan Plateau): Quantifying the Influence of Climate Change and Human Activities on Vegetation Net Primary Productivity and Livestock Carrying Capacity Growth Potential.

The formula for this analysis is as follows: S = n · ∑ i = 1 n ( i · V i ) − ∑ i = 1 n i · ∑ i = 1 n V i n · ∑ i = 1 n i 2 − ( ∑ i = 1 n i ) 2 The formulas provided are as follows: S: Linear trend value; V i : NPP A , NPP P , or NPP H ; i: Year index; n = 37 (referring to the number of years); S > 0 indicates an increasing trend in NPP; S < 0 indicates a decreasing trend in NPP.

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