## 3 Results  
### Forest Productivity during and after the Drought and/or Warming Scenarios  
In general, NPP showed a significant downward trend in the three months (from July to September) when climate extremes occurred (Figure 3). The average NPP when drought and warming happen was 0.83 kgC m\({}^{-2}\) yr\({}^{-1}\), which was significantly lower than that in the B0 scenario (1.05 kgC m\({}^{-2}\) yr\({}^{-1}\)), decreased by 20.78%. In addition, the average NPPs of the warming and drought scenarios were 0.95 kgC m\({}^{-2}\) yr\({}^{-1}\) and 0.96 kgC m\({}^{-2}\) yr\({}^{-1}\), respectively, and the change rates were \(-\)9.04% and \(-\)7.95% (Figure 3). In addition to the W1, W2, W3, D1, and D1 + W1 scenarios, the monthly NPP variation trend for other scenarios is different from that of the B0 scenario. Especially in the D3 and D3 + W3 scenarios, NPP decreased sharply after reaching the peak in May until the end of the disturbance (after September), which was very different from that in the B0 scenario, in which NPP decreased slowly in July after reaching the peak in May. The average monthly NPP for each forest plot is shown in Figure S2. According to the monthly difference, we calculated the difference and relative rate of change of NPP during (July-September) and after (October-December) the drought and/or warming scenarios (Tables 5 and 6). NPP varies over time in different scenarios. In the first month (July) after the disturbance, NPP under drought, warming, and drought-warming scenarios showed a significant downward trend, and NPP in the drought-warming scenario decreased by 17.00% on average. NPP under the warming scenario decreased by 10.75% on average; NPP declined by an average of 5.09% under drought conditions. In August, NPP decreased by 19.40% on average under drought-warming scenarios; NPP under the warming scenario decreased by 8.59% on average; NPP declined by an average of 8.30% under drought conditions. In September, NPP decreased by 25.64% on average under drought-warming scenarios; NPP under the warming scenario decreased by 7.79% on average; and NPP declined by an average of 10.24% under drought conditions. In general, within three months of the setting scenario, the decline rate of NPP under the drought-warming scenario and drought scenario gradually increased, while the decline rate of NPP under the warming scenario gradually slowed down. In the following October, the three scenarios maintained this trend and returned to normal levels in November and December (Table 6). NPP decreased more seriously under the combined drought-warming scenario, \begin{table}
\begin{tabular}{c c c c} \hline \hline
**Type** & **Scenario** & **Precipitation Rate** & **Air Temperature** \\  & & [kg m\({}^{-2}\) s\({}^{-1}\)] & [K] \\ \hline Default & Baseline (B0) & P\({}_{0}\) & T\({}_{0}\) \\ \hline \multirow{3}{*}{\begin{tabular}{c} Drought-only \\ scenario \\ \end{tabular} } & Mild drought (D1) & P\({}_{0}\)\(\times\) 0.6 & T\({}_{0}\) \\  & Moderate drought (D2) & P\({}_{0}\)\(\times\) 0.4 & T\({}_{0}\) \\  & Severe drought (D3) & P\({}_{0}\)\(\times\) 0.2 & T\({}_{0}\) \\ \hline \multirow{3}{*}{\
\begin{tabular}{c} Warming-only \\ scenario \\ \end{tabular} } & Mild warming (W1) & P\({}_{0}\) & T\({}_{0}\) + 1.0 \\  & Moderate warming (W2) & P\({}_{0}\) & T\({}_{0}\) + 1.5 \\  & Severe warming (W3) & P\({}_{0}\) & T\({}_{0}\) + 2.0 \\ \hline \multirow{3}{*}{
\begin{tabular}{c} Drought-warming \\ scenario \\ \end{tabular} } & Mild drought-warming & P\({}_{0}\)\(\times\) 0.6 & T\({}_{0}\) + 1.0 \\  & (D1 + W1) & Moderate & \\  & drought-warming & P\({}_{0}\)\(\times\) 0.4 & T\({}_{0}\) + 1.5 \\  & (D2 + W2) & \\  & Severe drought-warming & P\({}_{0}\)\(\times\) 0.2 & T\({}_{0}\) + 2.0 \\ \cline{1-1}  & (D3 + W3) & P\({}_{0}\)\(\times\) 0.2 & T\({}_{0}\) + 2.0 \\ \hline \hline \end{tabular} P\({}_{0}\) and T\({}_{0}\) are the precipitation rate [kg m\({}^{-2}\) s\({}^{-1}\)] and air temperature [K] under the baseline scenario, respectively.  
\end{table}