NDVI-Based Vegetation Change in Inner Mongolia from 1982 to 2006 and Its Relationship to Climate at the Biome Scale
Table 2
Correlation coefficients between monthly mean NDVI and , PET, , , and in the same month for different vegetation types.
Vegetation types
Climate variables
Correlation coefficient
4
5
6
7
8
9
10
Forest
−0.22
−0.25
0.08
−0.38
*
−0.44
**
−0.31
0.06
PET
0.74
***
0.43
**
0.13
0.35
*
0.55
***
0.60
***
−0.05
0.48
**
0.74
***
0.23
−0.21
0.32
−0.02
0.27
0.55
***
0.69
***
0.22
0.06
0.52
***
0.24
0.33
0.28
0.48**
0.25
−0.54
***
−0.23
−0.46
**
0.20
Meadow steppe
0.26
0.30
0.31
−0.14
−0.44
**
−0.03
0.32
PET
0.12
0.02
−0.25
0.07
0.49
**
−0.05
0.08
0.38
*
0.49
**
−0.12
0.03
0.13
0.07
0.33
0.30
0.38*
−0.16
0.07
0.33
−0.03
0.30
0.50
**
0.53
***
0.03
0.01
−0.38
*
0.12
0.38*
Typical steppe
0.30
0.63
***
0.54
***
0.19
0.10
−0.16
0.23
PET
−0.11
−0.38
*
−0.47
**
−0.31
−0.29
0.01
0.05
0.21
0.29
−0.37
*
−0.15
−0.21
0.23
0.25
0.10
0.11
−0.41
**
−0.19
−0.19
0.22
0.22
0.34
0.45**
−0.27
0.02
−0.17
0.22
0.30
Desert steppe
0.22
0.72
***
0.55***
0.60
***
0.56***
0.02
0.20
PET
−0.30
−0.58
***
−0.39*
−0.47
**
−0.55
***
−0.25
−0.30
−0.30
−0.20
−0.50
**
−0.33
−0.30
−0.00
−0.15
−0.34
*
−0.30
−0.49
**
−0.32
−0.32
0.01
−0.14
−0.21
0.19
−0.37
*
−0.160
−0.13
0.00
−0.14
Desert
−0.21
0.01
0.09
−0.36
*
−0.04
−0.09
−0.05
PET
0.10
0.08
0.01
0.24
0.07
−0.16
−0.29
−0.19
−0.04
0.20
0.11
0.11
−0.17
−0.45
**
−0.10
0.11
0.27
0.20
0.18
−0.09
−0.33
−0.24
−0.22
0.11
−0.12
−0.02
−0.24
−0.56
***
Crop
0.21
0.36
*
0.37
*
0.00
−0.21
−0.22
0.17
PET
−0.00
−0.21
0.07
−0.12
0.04
0.08
0.06
−0.07
−0.10
−0.43
**
0.17
0.20
0.40
**
0.16
−0.05
−0.17
−0.45
**
0.12
0.21
0.46
**
0.12
−0.02
−0.01
−0.43
**
0.28
0.12
0.36
*
0.15
, **, and * indicate , and , respectively; Bolded numbers denote larger correlation coefficients between the monthly mean NDVI and the corresponding climate variables in the same month, compared with those for climate variables in the preceding month.
