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Local Effective Thermal Inertia Estimated by Cloud Appearance

机译:通过云的外观估算局部有效热惯量

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Heat island intensity approaches the maximum during urban Phase A period, which constitutes a few hours around sunset when radiative cooling primarily determines the temperature decrease. To evaluate the thermal inertia of urban and rural canopy layer, we suggested a local effective thermal inertia (LETI) that corresponds to a canopy layer thermal inertia, excluding advection effects caused by such as heat island circulation, and estimated the value by observing a 30-min temperature variation and radiation flux when clouds appeared during night. The urban area LETI is approximately two times higher than the rural value. LETI has a close relationship to the cooling rate in Phase A and is an important value for urban canopy layer thermal inertia.
机译:在城市A期,热岛强度接近最大值,当辐射冷却主要决定温度下降时,热岛强度大约在日落时数小时。为了评估城乡冠层的热惯性,我们建议了一个与冠层热惯性相对应的局部有效热惯性(LETI),排除了由热岛循环等引起的对流影响,并通过观察30夜间出现云时的最小温度变化和辐射通量。城市LETI大约是农村价值的两倍。 LETI与阶段A的冷却速率有密切关系,并且是城市雨棚层热惯性的重要值。

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