A Comparison of Two Methods on the Climatic Effects of Urbanization in the Beijing-Tianjin-Hebei Metropolitan Area

Table 4

Linear trends of regional average annual, rural, and UMR temperature (°C decade⁻¹) and the contribution of urban warming to the total warming for different time periods. Statistical significance is 0.05 (single asterisk) and 0.01 (double asterisk).

	Total	Rural	UMR	UHI contribution
1960–1969	−1.10	−1.13	0.03	0.30%
1970–1979	0.39	0.25	0.16	41.03%
1980–1989	0.46	0.33	0.15	32.61%
1990–1999	1.28	1.14	0.16	12.50%
2000–2009	0.26	0.21	0.09	34.62%
1960–2009	0.30	0.19	0.12	40.00%