CONUS VPD and soil moisture thresholds for suboptimal vegetation function

The dataset contains minimum and maximum vapor pressure deficit (VPD) and soil moisture parameters that define the range of suboptimal vegetation function (i.e., between uninhibited photosynthesis and complete shutdown). The ranges were estimated using the Dynamic Canopy Biophysical Properties model (DCBP; Lowman & Barros 2018), which consists of a phenology forecasting model based on the growing season index (GSI), which provides a unitless measure of the potential phenologic state of vegetation based on the concurrent meteorological conditions (Jolly et al. 2005).本数据集包含水汽压亏缺（Vapor Pressure Deficit, VPD）与土壤湿度的极值参数，用于界定植被功能次优的区间，即未受抑制的光合作用与光合完全停止之间的范围。该区间的参数范围通过动态冠层生物物理特性模型（Dynamic Canopy Biophysical Properties Model, DCBP；Lowman & Barros, 2018）估算得到；该模型包含基于生长季指数（Growing Season Index, GSI）的物候预测模型，生长季指数可基于同期气象条件对植被潜在物候状态进行无量纲量化（Jolly et al., 2005）。