Spatial and temporal air temperature variability in Berlin, Germany, during the years 2001-2010
Spatial and temporal air temperature variability in Berlin, Germany, during the years 2001-2010
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DOI：
10.1016/j.uclim.2014.02.004
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发表时间：
2014-12-01
期刊：
影响因子：
6.4
通讯作者：
Polze, Albert
中科院分区：
文献类型：
--
作者：
Fenner, Daniel;Meier, Fred;Polze, Albert
研究了长期数据（2001-2010），以分析德国柏林气温 (T) 的空间和时间变化。使用五个地点来研究空间气温差异（Delta T）。这些地点根据当地气候区概念进行分类。研究了气温 (T') 和气温差 (Delta T') 的时间异常，即每小时值与十年平均值之间的差异。与夏季的参考地点（“分散的树木”- LCZ B）相比，城市内夜间的年代际 Delta T 呈强烈正值。冬季，Delta T 全天呈轻微正值。比较城市内外两个具有 LCZ“密集树木”的地点，发现温度超出了 0.3 K。与建筑结构外的 T' 相比，城市内部的 T' 至少减弱了 10%。城市树冠在阻尼 T' 方面的反应类似于森林树冠。炎热的天气条件会导致白天的 Delta T' 为负值，而夜间的 Delta T' 值为正值。夜间值与空间平均植被分数和包括植被在内的天空视野因子（SVF）有关。没有植被的 SVF 没有显示出这种关系，突出了在空间平均 SVF 计算中包含树木的重要性。 (C) 2014 年由 Elsevier B.V. 出版
Long-term data (2001-2010) were studied to analyse the spatial and temporal variability of air temperatures (T) in Berlin, Germany. Five sites were used to investigate spatial air temperature differences (Delta T). The sites were classified according to the Local Climate Zone concept. Temporal anomalies, being the differences between hourly values and the decadal average at that time, were investigated for air temperatures (T') and air temperature differences (Delta T'). Decadal Delta T was strongly positive during night-time inside the city compared to the reference site ("scattered trees'' - LCZ B) during summer. During winter Delta T was slightly positive throughout the whole day. Comparing two sites with LCZ "dense trees'' inside and outside the city revealed a temperature excess of 0.3 K. T' inside the city compared to T' outside the built-up structures was damped by at least 10%. The urban canopy responded similar to a forest canopy in damping T'. Hot weather conditions lead to negative Delta T' during daytime and positive Delta T' at night. The nocturnal values were related to spatial mean vegetation fractions and sky view factors (SVF) including vegetation. SVF without vegetation did not show this relationship, highlighting the importance of including trees in spatially averaged SVF computation. (C) 2014 Published by Elsevier B.V.