Table 2.

Spearman rank correlation coefficients (p-values) between satellite-derived LST and SI measurements, with ground-based temperature measurements.

Measurement	Concentric radii distances (m) around monitoring point used to calculate an average	Ground-based temperature measurements
		Instantaneous temperature, 1205 hours, 19 August 2009	Average temperature, 0920–1210 hours	Average temperature, 0400–0500 hours, 19 August 2009	Average temperature from 1205 hours, 18 August 2009 to 1210 hours, 19 August 2009	August average monthly temperature
LST	At point (0 m)	0.0018 (0.99)	–0.11 (0.66)	0.22 (0.36)	0.47 (0.043)	0.47 (0.041)
100	0.026 (0.91)	–0.10 (0.68)	0.21 (0.38)	0.44 (0.060)	0.44 (0.053)
300	0.0070 (0.98)	–0.0070 (0.98)	0.28 (0.24)	0.48 (0.038)	0.51 (0.027)
400	0.030 (0.90)	0.084 (0.73)	0.33 (0.17)	0.55 (0.015)	0.59 (0.0084)
500	0.068 (0.78)	0.18 (0.45)	0.32 (0.18)	0.55 (0.014)	0.61 (0.0057)
800	0.13 (0.60)	0.25 (0.30)	0.41 (0.085)	0.62 (0.0048)	0.68 (0.0014)
SI	At point (0 m)	0.058 (0.81)	–0.39 (0.098)	–0.0097 (0.97)	0.17 (0.47)	0.71 (0.48)
100	0.16 (0.50)	0.019 (0.94)	0.59 (0.0075)	0.72 (0.0005)	0.69 (0.001)
300	0.081 (0.74)	0.15 (0.54)	0.66 (0.002)	0.83 (< 0.0001)	0.81 (< 0.0001)
400	0.17 (0.48)	0.20 (0.40)	0.59 (0.0077)	0.76 (0.0001)	0.77 (0.0001)
500	0.22 (0.36)	0.22 (0.36)	0.62 (0.0043)	0.81 (< 0.0001)	0.82 (< 0.0001)
800	0.22 (0.37)	0.17 (0.48)	0.60 (0.0062)	0.75 (0.0002)	0.77 (0.0001)
Spearman correlation statistical test was used to calculate a correlation coefficient; p < 0.05.