Seasonal and diurnal fluxes of radiation, heat, water vapor, and carbon dioxide over a suburban area
Seasonal and diurnal fluxes of radiation, heat, water vapor, and carbon dioxide over a suburban area
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DOI：
10.1175/jam2153.1
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发表时间：
2004-11-01
期刊：
影响因子：
--
通讯作者：
Kanda, M
中科院分区：
文献类型：
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作者：
Moriwaki, R;Kanda, M
根据一年的现场测量，描述了日本东京一个住宅区的每日、季节性和年度能量和二氧化碳 (CO2) 通量。主要调查结果如下。 1) 尽管净全波辐射Rn有显着的季节变化，但白天的蓄热热通量G的季节变化很小。 2）尽管自然覆盖面积（树木和裸土）较小，但夏季白天的潜热通量很大。估计当地单位自然覆盖度潜热通量为可利用能量（Rn - G）的2倍，表明“绿洲效应”显着。3）全年CO2通量始终向上，且冬季幅度更大，主要是由于化石燃料消耗的增加。典型温带落叶林年总CO2通量是向下CO2通量的6倍。
Based on 1 yr of field measurements, the diurnal, seasonal, and annual fluxes of energy and carbon dioxide (CO2) at a residential area of Tokyo, Japan, are described. The major findings are as follows. 1) The storage heat flux G in the daytime had little seasonal variation, irrespective of significant seasonal change of net all-wave radiation Rn. 2) The latent heat flux in the summer daytime was large despite the small areal fraction of natural coverage ( trees and bare soil). The estimated local latent heat flux per unit natural coverage was 2 times the available energy (Rn - G), which indicates that the "oasis effect'' was significant. 3) The CO2 flux was always upward throughout the year and the magnitude was larger in winter, mainly because of an increase of fossil fuel consumption. The annual total CO2 flux was 6 times the downward CO2 flux at a typical temperate deciduous forest.