1961-2013年华北晋冀山地和黄土高原区树木生长季变化趋势
郭媛媛, 江源, 董满宇, 文岩, 王明昌, 焦亮

Trends in the tree growing season throughout the Hebei and Shanxi mountainous region and Loess Plateau of North China from 1961 to 2013
GUO Yuanyuan,JIANG Yuan,DONG Manyu,WEN Yan,WANG Mingchang,JIAO Liang
表1 1961-2013年研究区春季和秋季空气温度与树木生长季指标的线性回归分析结果
Table 1 Results of linear regression analyses between the air temperature of March to May,September to November and three tree growing season indices (GSS,GSE,and GSL)in the study area from 1961 to 2013
晋冀山区 黄土高原区
Tmean Tmax Tmin Tmean Tmax Tmin Tmean Tmax Tmin Tmean Tmax Tmin
生长季
开始
回归系数(斜率) -5.60 -6.17 -4.28 -3.74 -2.61 -4.74
决定系数(R2 0.92*** 0.87*** 0.88*** 0.84*** 0.62*** 0.94***
生长季
结束
回归系数(斜率) 4.12 5.56 3.30 4.40 3.32 4.15
决定系数(R2 0.98*** 0.95*** 0.97*** 0.95*** 0.84*** 0.75***
生长季
长度
回归系数(斜率) 9.92 10.56 7.79 8.94 12.12 7.23 7.31 5.28 8.89 9.14 6.61 8.96
决定系数(R2 0.95*** 0.83*** 0.95*** 0.91*** 0.90*** 0.93*** 0.88*** 0.69*** 0.90*** 0.97*** 0.78*** 0.83***