**3.4 Responses of aboveground productivity to climate variation**

Regression analysis showed that ANPP was significantly correlated with MAT (**Figure 5b**) but was little influenced by AP variations (**Figure 5a**).

The VIP and standardised model coefficients of the PLS analysis showed that impacts of warming on grassland productivity varied with season periods (**Figure 6a**). Different with the clear-cut impacts of temperature on ANPP, precipitation showed more complex impacts (**Figure 6b**).
