Research Article
Influences of Urban Expansion on Urban Heat Island in Beijing during 1989–2010
Table 1
The thresholds of different thermodynamic levels (unit: °C).
| Level | 1989 | 2000 | 2010 |
| Low | 21–23.46 | 21–22.33 | 21–23.82 | Submedium | 23.46–24.75 | 22.33–23.35 | 23.82–25.85 | Medium | 24.75–25.60 | 23.35–24.87 | 25.85–27.10 | Subhigh | 25.60–26.87 | 24.87–26.85 | 27.10–28.91 | High | 26.87–30 | 26.85–31 | 28.91–32 |
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