Carbon flux simulation and meteorological factor data set of southern poplar plantation from 2019 to 2023

Table 1 is the daily carbon flux observation value, default parameter simulation value and optimized parameter simulation value of poplar plantation in Sihong Forest Farm of Jiangsu Province from 2019 to 2020 in Figure 1. Table 2 shows the daily carbon flux observations and optimized parameter simulations in Figure 2 from 2021 to 2023, with the observations missing from January to February 2023.

The unit is g C · m-2 · d-1. Table 3 shows the first-order and global sensitivity index values of each parameter in Fig.3. Table 4 is the source data used for path analysis in Figure 4, where Srad : shortwave radiation flux density W · m-2 ; ta : temperature °C ; prcp : precipitation mm ; vPD : saturated vapor pressure difference kPa