期刊
THEORETICAL AND APPLIED CLIMATOLOGY
卷 95, 期 3-4, 页码 291-299出版社
SPRINGER WIEN
DOI: 10.1007/s00704-008-0007-7
关键词
-
资金
- Core Research for Evolutional Science and Technology of The Japan Science and Technology Cooperation
The roughness length for heat z(T) was evaluated over an urban canopy, using the measured sensible heat flux and radiometric temperature. To overcome thermal heterogeneity in the urban area, the measured radiometric temperature was transformed into the equivalent temperature of an upward longwave radiation flux. The equivalent temperature was found to provide an effective parameterization of the radiometric temperature. The daytime average of the resulting ln(z(T)/z(0)) was 10, where z(0) is the aerodynamic roughness length. This result generally agrees with previous studies; however, the anthropogenic heat is a large uncertainty, which could cause an error at least 240% in z(T).
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