中国北方植被水分利用效率的时间变化特征及其影响因子

冯朝阳,王鹤松,孙建新

Temporal changes of vegetation water use efficiency and its influencing factors in Northern China

Chao-Yang FENG,He-Song WANG,Jian-xin SUN

表2 不同时间尺度下逐步回归方程中各气象因子标准回归系数及总体决定系数(R2) (p < 0.05)

Table 2 Standardized regression coefficients of meteorological factors and coefficient of determination (R2) in stepwise regression equations in different time scales (p < 0.05)

台站名 Site 0.5 h R2 1 d R2 8 d R2 逐月 Monthly R2 长白山 Changbaishan Ta (0.97), RH (-0.54), VPD (-0.91), PAR (-0.17) 0.49 Ta (0.83), VPD (-0.27) 0.68 Ta (0.82) 0.67 内蒙古 Nei Mongol Ta (0.29), RH (0.14), PAR (-0.19) 0.14 RH (0.45) 0.20 (无显著因子) (No significant factor) 海北 Haibei Ta (0.90), VPD (-0.42), PAR (-0.27) 0.71 Ta (1.05), VPD (-0.36), PAR (-0.12) 0.93 Ta (0.89), PAR (-0.33) 0.94 大兴 Daxing Ta (0.51), VPD (-0.57), PAR (-0.34) 0.36 Ta (0.80), RH (-0.27), VPD (-0.80), PAR (-0.37) 0.46 RH (0.61) 0.40 PAR (-0.85) 0.73 密云 Miyun Ta (0.18), RH (0.26), VPD (-0.13), PAR (-0.18) 0.20 Ta (0.71), VPD (-0.57), PAR (-0.33) 0.49 RH (0.51), Ta (0.57) 0.69 RH (0.80) 0.65 张掖 Zhangye Ta (0.30), RH (0.50), PAR (-0.39) 0.45 Ta (0.32), RH (0.70), PAR (-0.14) 0.61 Ta (0.36), RH (0.58), PAR (-0.44) 0.69 (无显著因子) (No significant factor) 大满 Daman Ta (0.68), RH (0.37), VPD (-0.52), PAR (-0.21) 0.57 Ta (0.54), RH (0.53), PAR (-0.31) 0.63 Ta (0.94), VPD (-0.46) 0.70 Ta (0.84) 0.71 巴吉滩 Bajitan Ta (-0.36), RH (-0.48), PAR (-0.24) 0.20 Ta (-0.33), RH (-0.58), PAR (-0.12) 0.30 RH (-0.77), VPD (-0.46) 0.70 RH (-0.87) 0.70 花寨子 Huazhaizi RH (-0.27), PAR (-0.27) 0.12 RH (-0.65), PAR (-0.50) 0.31 RH (-0.66) 0.40 (无显著因子) (No significant factor)