Estimation of Effective Thermal Property Parameter on a Heterogeneous Urban Surface

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概要

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• A thermal property parameter for expressing the ground heat flux(cρλ ; product of the heat capacity and the thermal conductivity)of urban complex terrain was estimated. The surface temperature time series was observed during nocturnal radiative cooling, and employed in the estimation. The surface temperature was obtained using the airborne-measured upward longwave radiation in order to consider the directional anisotropy of radiometric surface temperature. The effective thermal property parameter for a town-scale urban area was found to be two to four times larger than that of the surface material component. The explanation for this, shown by several model simulations and other radiometric observations, was total surface area increased due to urban canyon structure. The parameter cρλ on the town-scale was expressed by the canyon shape, and the cρλ of its component material.

• 社団法人日本気象学会の論文
• 2001-12-25

著者

• Mikami Takehiko

  Dept.geography Tokyo Metropolitan University

• Narita Ken-ichi

  Dept.architecture Nippon Institute Of Technology

• Sugawara Hirofumi

  Dept.Geoscience, National Defense Academy of Japan

• Sugawara Hirofumi

  Dept.geoscience National Defense Academy Of Japan

関連論文

• Estimation of Effective Thermal Property Parameter on a Heterogeneous Urban Surface

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