Heat Budget Analysis of Nocturnal Cooling and Daytime Heating in a Basin
Heat Budget Analysis of Nocturnal Cooling and Daytime Heating in a Basin
复制标题
盆地夜间制冷和白天供暖的热收支分析
DOI：
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发表时间：
1989
期刊：
影响因子：
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通讯作者：
S. Haginoya
中科院分区：
文献类型：
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作者：
J. Kondo;T. Kuwagata;S. Haginoya
Abstract Nocturnal cooling and daytime heating in a basin were studied on clear and calm days by means of heat budget observations. In the nighttime, drainage flow occurs along the basin sideslope and advects cold air to the boundary layer over the basin bottom (BBL), intensifying the cooling rate of the layer. A nocturnal cold air lake develops in the basin, attaining a depth nearly equal to the topographical depth of the basin. Heat budget analysis of the whole basin surface shows that net radiative flux closely balances with sensible heat flux and ground heat conduction. In the daytime, the BBL is warmed not only by sensible heat flux from the surface of the basin bottom, but also by local subsidence heating. This local subsidence above the basin bottom depresses development of the convective boundary layer until the nocturnal cold air lake vanishes completely. The subsidence velocity increases with time after sunrise. Over the whole basin surface, net radiative flux closely balances with sensible and ...
