Influences of Urban Expansion on Urban Heat Island in Beijing during 1989–2010

Table 4

Gravity center transfer distances and angles of urban land and UHI in 1989–2010 in Beijing.

Zones	1989–2000				2000–2010
	Urban land		UHI		Urban land		UHI
	Distance	Angle	Distance	Angle	Distance	Angle	Distance	Angle
N	3712.84	72.25	2398.79	74.45	3589.19	71.21	2750.61	18.07
NE	1365.69	61.48	1998.14	163.51	1194.50	61.22	1719.09	67.13
E	4276.40	331.52	480.08	337.33	2361.49	336.04	1483.85	296.58
SE	3731.79	294.68	309.74	328.47	1839.50	300.80	3887.52	276.94
S	7791.64	259.82	2753.14	252.52	2998.27	234.34	2661.15	234.30
SW	773.61	254.10	660.58	331.22	1699.14	198.00	1974.41	271.16
W	1368.30	169.64	4358.77	172.06	1499.32	159.14	1679.55	159.58
NW	3425.77	100.07	1589.25	114.34	2329.85	95.27	693.19	108.85